CN110396942B - Steel arch frame assembling and traversing system and method for upper bearing arch bridge construction - Google Patents
Steel arch frame assembling and traversing system and method for upper bearing arch bridge construction Download PDFInfo
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- CN110396942B CN110396942B CN201910779411.8A CN201910779411A CN110396942B CN 110396942 B CN110396942 B CN 110396942B CN 201910779411 A CN201910779411 A CN 201910779411A CN 110396942 B CN110396942 B CN 110396942B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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Abstract
The invention discloses a steel arch frame assembling and traversing system and a method for upper bearing arch bridge construction, wherein the system comprises an arch frame assembling device for assembling a steel arch frame and an arch frame supporting and traversing device for supporting and traversing the assembled steel arch frame; the method comprises the following steps: 1. the lower support structure of the bridge is constructed with the steel arch support and the translational slideway is installed with the lifting device; 2. constructing a cable crane and an arch frame sectional transferring device; 3. assembling a steel arch; 4. jacking an arch-shaped supporting frame; 5. the arch-shaped supporting frame is put down; 6. the transverse movement driving device is installed; 7. the arched support frame transversely moves; 8. the arch-shaped supporting frame is jacked up. The steel arch splicing device is reasonable in design, convenient and simple to realize and good in using effect, the arch splicing device and the arch support and the traversing device are matched for use, the steel arch splicing process can be simply, conveniently and rapidly completed, the steel arch can be traversed through the arch support and the traversing device, and the aim of constructing two arch ribs through one steel arch is fulfilled.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a steel arch frame assembling and traversing system and method for upper bearing arch bridge construction.
Background
The upper bearing arch bridge is a bridge with bridge deck system set on the main bearing structure of bridge span, and the arch base transmits the thrust of the arch rib end to the bedrock. The abutment for supporting the rib is a permanent abutment, typically a reinforced concrete structure supported on bedrock. When constructing an upper-bearing box-type arch bridge with the arch rib being a reinforced concrete arch ring, the arch rib is usually constructed by adopting a pre-erected steel arch frame in place in a cast-in-situ manner; and after the arch rib is cast and formed, dismantling the steel arch. After the steel arch is erected in place and before the steel arch is adopted to cast the arch rib, in order to accurately master the conditions of stress, strain and displacement of the steel arch under the influence of factors such as load and temperature, the steel arch is ensured to be cast safely and smoothly, the steel arch erected in place is required to be pre-pressed, full-section pre-pressing is required to be carried out on the steel arch, and the main aim of pre-pressing of the steel arch is as follows: firstly, checking the strength and stability of the steel arch and the support, and eliminating the inelastic deformation of the steel arch before the pouring construction of the arch rib concrete, mainly eliminating the settlement deformation amount of the steel arch and the deformation of each contact part of the arch; secondly, testing the stress condition and the elastic deformation condition of the steel arch, and measuring the elastic deformation of the steel arch. And after the arch rib is cast and formed, dismantling the steel arch.
In the actual construction process, the upper-bearing arch bridge is generally provided with two arch ribs which are symmetrically arranged left and right, and is comprehensively considered in combination with site topography conditions, construction sites, construction periods and economy, and generally only one set of steel arch is put into, specifically, one arch rib is poured by adopting the pre-pressed steel arch, the steel arch is transversely moved to the construction position of the other arch rib after the pouring is completed, and the steel arch is removed after the construction of the two arch ribs is completed. In particular, under the conditions of limited construction sites, serious traffic jam and the like of the constructed upper-bearing arch bridge, in order to ensure smooth traffic, the left arch rib and the right arch rib cannot be constructed simultaneously, a steel arch frame is generally adopted to pour one arch rib, and then the steel arch frame is transversely moved to the construction position of the other arch rib. In addition, the space between the bottoms of the arch legs is not changed in the whole transverse moving process of the steel arch, the deformation of the steel arch is negligible, and the inelastic deformation is eliminated, so that the transverse moving steel arch is not required to be pre-pressed when another arch rib is constructed, the arch rib can be directly constructed, the construction cost can be greatly saved, and the labor and time are saved.
However, when the steel arch is transversely moved at present, construction operation is more random, a set of unified and standard transverse equipment and a transverse moving method are not available, in addition, the steel truss is large in size and weight, the transverse moving difficulty of the steel truss is high, the problems that the transverse moving process is complex, the steel truss is unstable, the transverse moving speed is low and the like are inevitably caused in the transverse moving process, and the steel truss is not easy to support after the steel truss is transversely moved in place. Meanwhile, when the steel arch is moved out from the lower part of the poured arch rib, the steel truss is firmly supported at the bottom of the poured arch rib, so that when the steel truss is moved out from the lower part of the arch rib, the moving-out difficulty is very high, the steel truss is inevitably deformed in the moving-out process, and even the steel truss is damaged.
In addition, because the steel arch is generally a three-dimensional steel truss formed by assembling a plurality of straight rods. The cable crane is a special type of hoisting equipment, has a plurality of unique advantages, is not limited by climate and topography, can play roles which cannot be played by other hoisting machinery under specific conditions, and is widely applied to engineering construction. The expressway and railway bridges often meet the conditions that brackets cannot be erected or hoisting machinery cannot be used for construction when crossing heavy mountain areas, and because the cost for building temporary roads in mountain areas is too high, the construction technology for erecting brackets in rivers and lakes is difficult, the factors such as inconvenient traffic guidance and the like brought by crossing existing lines are caused, and cable hoisting becomes the most economical and reasonable scheme selection in road and railway construction, and particularly, the construction technology research on the bridge crossing large rivers, cliffs, rivers, lakes and the like and crossing the existing lines has larger development space.
When the steel arch of the upper bearing arch bridge is assembled and erected by adopting a cable hoisting method, the construction operation is more random, no set of unified and standard construction method can be followed, and the steel truss has large volume and large weight and is difficult to assemble. Meanwhile, because the hoisting range of the cable crane is limited, hoisting equipment is required to be equipped on site to hoist the steel truss section which is assembled and formed in advance into the hoisting range of the cable crane, but because the constructed upper bearing arch bridge spans a heavy mountain area, the construction environment is unfavorable and the construction space is limited, the normal use of the hoisting equipment is greatly limited.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a steel arch splicing and traversing system for the construction of an upper-bearing arch bridge, which has reasonable structural design, simple and convenient use and operation and good use effect, and the arch splicing device and the arch support are matched with each other for use, so that the arch splicing sections can be simply, conveniently and rapidly moved to the hoisting area of a cable crane by an arch segmentation transferring device, and the cable crane can hoist the arch splicing sections which are moved in place, thereby being capable of simply, conveniently and rapidly completing the steel arch splicing process; and the assembled steel arch can be transversely moved by adopting the arch support and transverse moving device, so that the aim of constructing two arch ribs by one steel arch is fulfilled.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a steel bow member is assembled and sideslip system for construction of upper supporting arch bridge which characterized in that: the device comprises an arch frame assembling device for assembling the steel arch frames and an arch frame supporting and traversing device for supporting and traversing the assembled steel arch frames;
the steel arch frame is an arch support frame for constructing an arch rib of the constructed upper bearing arch bridge, the front end and the rear end of the arch rib are respectively supported on a permanent support, and the permanent support is a reinforced concrete support; the arch ribs are arranged along the longitudinal bridge direction and are reinforced concrete arch rings, the arch ribs are supported right above the arch support frames, and the arch support frames are arranged along the longitudinal bridge direction;
The constructed upper-bearing arch bridge comprises a left arch rib and a right arch rib which are symmetrically arranged, and a main beam is uniformly distributed right above each arch rib; one arch rib in the constructed upper-bearing arch bridge is a pre-construction arch rib, and the other arch rib is a post-construction arch rib which is constructed after the construction of the pre-construction arch rib is completed;
the front end and the rear end of each girder are respectively supported on a bridge abutment, the girders are horizontally arranged and comprise a middle girder section supported on arch ribs and two side girder sections respectively positioned on the front side and the rear side of the middle girder section, the middle girder section is connected between the two side girder sections, the middle girder section and the arch ribs are all arranged along the longitudinal bridge direction, and the middle girder section is fixedly connected with the arch ribs through a plurality of vertical upright posts arranged along the longitudinal bridge direction from front to rear; each side beam Duan Xiafang is provided with a plurality of support piers which are vertically arranged from front to back along the longitudinal bridge, the support piers are reinforced concrete piers, each side beam Duan Jun is supported on one abutment and a plurality of support piers, and one abutment and a plurality of support piers supported by each side beam Duan Xiafang form a side beam section support structure; the two side beam section supporting structures below each main beam are respectively a front side beam section supporting structure positioned at the front side of the arch rib and a rear side beam section supporting structure positioned at the rear side of the arch rib, and the two permanent supports are respectively a front permanent support positioned below the front end of the arch rib and a rear permanent support positioned below the rear end of the arch rib;
The arch support frames are assembled by an assembled steel arch or an assembled steel arch arranged from left to right along a transverse bridge, each assembled steel arch is an arch, each assembled steel arch is arranged along a longitudinal bridge direction and is formed by splicing a plurality of arch assembled sections arranged from front to back along the longitudinal bridge direction;
the arch frame assembling device comprises a cable crane for hoisting the arch frame assembling sections of the assembled steel arch frame and an arch frame sectional transferring device for moving the arch frame assembling sections one by one;
the arch frame sectional transferring device comprises an assembling segment moving device for horizontally moving the assembling segments of the arch frame one by one and a horizontal moving channel for horizontally moving the assembling segment moving device, wherein the horizontal moving channel is horizontally arranged and is arranged along a longitudinal bridge direction;
the horizontal moving channel is arranged on the rear side beam section supporting structure right behind the pre-construction arch rib, and the rear side beam section supporting structure right behind the pre-construction arch rib is a moving channel supporting structure; the horizontal moving channel comprises a longitudinal supporting beam supported on the moving channel supporting structure, the assembly segment moving device is a horizontal moving device which can drive the assembly segments of the moved arch frame to synchronously move in the process of moving the longitudinal supporting beam forwards and backwards, and the longitudinal supporting beam is horizontally arranged and is arranged along the longitudinal bridge direction; the horizontal moving device is arranged on the longitudinal supporting beam, and the movable arch frame assembly section is horizontally supported on the horizontal moving device; the rear end of the longitudinal supporting beam is an abutment supporting end supported on an abutment in the moving channel supporting structure, and the front end of the longitudinal supporting beam is a hoisting end; a horizontal limiting piece for limiting the horizontal moving device is arranged on the lifting end of the longitudinal supporting beam;
The cable crane comprises a front tower and a rear tower, working cables arranged on the two towers and a lifting trolley capable of moving back and forth along the working cables and lifting the arch frame assembly sections, the lifting trolley is arranged on the working cables and positioned between the two towers, and the lifting trolley is positioned above the pre-construction arch ribs; the two towers, the pre-construction arch rib and the longitudinal supporting beams are positioned on the same vertical surface, and the two towers are respectively a front tower positioned at the front side of the pre-construction arch rib and a rear tower positioned at the rear side of the pre-construction arch rib;
the front side beam section supporting structure comprises a front side beam section supporting structure, a rear side beam section supporting structure and a rear side beam section supporting structure, wherein a supporting pier column positioned at the forefront side in the rear side beam section supporting structure is a front pier column, a lifting end of a longitudinal supporting beam is positioned at the front side of the rear tower, the lifting end of the longitudinal supporting beam is supported on the front pier column, and the longitudinal supporting beam is a horizontal supporting beam penetrating through the middle part of the rear tower; the rear tower and the front pier stud are both supported on the rear permanent support, and the front pier stud is positioned at the front side of the rear tower;
the arch support and traversing device comprises a translation device for translating the arch support frame along a transverse bridge, a left lifting device and a right lifting device which are symmetrically arranged and move the arch support frame up and down, and a left steel arch support and a right steel arch support which are symmetrically arranged and support the arch support frame, wherein each steel arch support is positioned under one arch rib; a transverse distribution beam is arranged below the front end and the rear end of the arched support frame, and is horizontally arranged and arranged along the transverse bridge direction; the bottoms of the front end and the rear end of the arched support frame are respectively provided with a transverse installation seat, the transverse installation seats are horizontally arranged and are arranged along the transverse bridge direction, and each transverse distribution beam is arranged at the bottom of one transverse installation seat;
Each steel arch support comprises a front temporary arch seat and a rear temporary arch seat which are symmetrically distributed, wherein the two temporary arch seats are distributed along the transverse bridge direction and are respectively a front support for supporting the front end of the arch support frame and a rear support for supporting the rear end of the arch support frame;
each temporary arch seat is an L-shaped support; the L-shaped support comprises a horizontal support and a vertical support arranged above the outer side of the horizontal support, the horizontal support and the vertical support are both arranged along the transverse bridge direction and are reinforced concrete supports, and the horizontal support and the vertical support in each temporary arch seat are poured into a whole; each horizontal support is provided with M vertical grooves which are distributed on the same vertical surface, and the structures and the sizes of the M vertical grooves are the same and are distributed from left to right along a transverse bridge; wherein M is a positive integer and M is more than or equal to 3; each vertical groove is a cube groove; m vertical grooves in each temporary arch seat are positioned on the inner side of the vertical support;
the front supports of the two steel arch supports form a front support, and the rear supports of the two steel arch supports form a rear support; all vertical grooves in the front side support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all vertical grooves in the rear side support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction;
Each lifting device is uniformly distributed on one steel arch support; each lifting device comprises a front lifting mechanism and a rear lifting mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one lifting mechanism; each lifting mechanism comprises N vertical jacks which are distributed on the same vertical surface from left to right along the transverse bridge direction, the N vertical jacks are identical in structure and size and are uniformly distributed on the same horizontal surface, and the vertical jacks are hydraulic jacks distributed in the vertical direction; wherein N is a positive integer, and N is more than or equal to 2 and less than or equal to M; each vertical jack is uniformly arranged in one vertical groove;
all the vertical jacks on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical jacks on the front support form a front jacking device; all the vertical jacks on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and the rear lifting device is formed by all the vertical jacks on the rear support; the front side jacking device is positioned right below one transverse distribution beam, and the rear side jacking device is positioned right below the other transverse distribution beam; all the vertical jacks on each steel arch support form a steel arch jacking device for synchronously jacking the arch support frame;
The translation device comprises a front translation slideway and a rear translation slideway which are symmetrically arranged and used for the translation of the transverse installation seat, and a front transverse translation driving device and a rear transverse translation driving device which synchronously drive the arched support frame to translate along the transverse bridge direction, wherein the two transverse translation driving devices are symmetrically arranged, and the translation slideway is horizontally arranged and is arranged along the transverse bridge direction; each transverse moving driving device comprises a pushing jack for horizontally pushing the transverse distribution beam along the transverse bridge direction, wherein the pushing jacks are horizontally arranged and are arranged along the transverse bridge direction; each pushing jack and one transverse distribution beam are arranged on the same vertical surface, and the pushing jacks prop up on the transverse distribution beams positioned on the same vertical surface;
the two translation slideways are respectively a front slideway arranged on the front support and a rear slideway arranged on the rear support; a horizontal slideway for the horizontal installation seat to translate is arranged on the inner side wall of each vertical support, and the horizontal slideway is arranged along the transverse bridge direction and is positioned below the horizontal installation seat; the horizontal slides installed on the vertical supports are arranged on the same horizontal straight line and form the front side slide, the horizontal slides installed on the vertical supports are arranged on the same horizontal straight line and form the rear side slide.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: each transverse movement driving device further comprises a counter-force frame for providing counter-force for the pushing jack, each counter-force frame and one pushing jack are arranged on the same vertical surface, and each pushing jack is located between one counter-force frame and the steel arch frame.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: the arch support and traversing device also comprises left and right symmetrically arranged girder dropping devices, and each girder dropping device is uniformly distributed on one steel arch support; each beam falling device comprises a front beam falling mechanism and a rear beam falling mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one beam falling mechanism; each beam falling mechanism comprises H temporary supports which are arranged on the same vertical surface from left to right along the transverse bridge direction and used for supporting the steel arch in the descending process, the temporary supports are vertically arranged, the structures and the sizes of the H temporary supports are the same, and the H temporary supports are uniformly arranged on the same horizontal plane; wherein H is a positive integer and H is less than or equal to M; each temporary support is uniformly distributed in one vertical groove;
All temporary supports on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the front support form a front girder falling support; all temporary supports on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the rear support form a rear girder falling support; the front side drop beam support is positioned right below one transverse distribution beam, and the rear side drop beam support is positioned right below the other transverse distribution beam; all temporary supports on each steel arch support form a steel arch girder falling support for synchronously supporting the steel arch;
the temporary support is a sand cylinder or a sand box.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: the front arch leg and the rear arch leg of the arch support frame are respectively supported on an arch frame hinge seat, the arch frame hinge seat is the transverse installation seat, and the transverse distribution beam is an arch seat beam arranged at the bottom of the arch frame hinge seat; the arch-shaped supporting frames are vertically distributed and are distributed along the longitudinal bridge direction;
The arch support frame comprises a front arch leg section and a rear arch leg section which are symmetrically arranged, and a bearing steel arch frame connected between the two arch leg sections, wherein the bearing steel arch frame and the two arch leg sections are arranged along the longitudinal bridge direction;
the bottoms of the two arch leg sections are respectively provided with a transverse steel pipe horizontally supported on an arch frame hinging seat, the transverse steel pipes are horizontally distributed and distributed along the transverse bridge direction, and the transverse steel pipes are round steel pipes; each transverse steel pipe is supported on one arch frame hinging seat, and each transverse steel pipe is connected with the arch frame hinging seat supported by the transverse steel pipe in a hinging manner;
the arch centering hinging seat comprises a horizontal supporting seat supported on the arch seat beam and a supporting steel plate supported on the horizontal supporting seat, wherein the horizontal supporting seat and the supporting steel plate are horizontally arranged and are both arranged along the transverse bridge direction; the cross section of the supporting steel plate is arc-shaped, each transverse steel pipe is supported on one supporting steel plate, each transverse steel pipe and the supporting steel plate supported by the transverse steel pipe are coaxially arranged, and the supporting steel plate is located below the outer side of the supported transverse steel pipe.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: the two bridge abutments below the pre-construction arch rib are respectively a front bridge abutment supported below the front end of the main beam and a rear bridge abutment supported below the rear end of the main beam, a front anchor ingot is arranged right in front of the front bridge abutment, and a rear anchor ingot is arranged right behind the rear bridge abutment;
Each tower is provided with an arch temporary fixing mechanism, each arch temporary fixing mechanism comprises a left group of buckling ropes and a right group of buckling ropes which are symmetrically distributed and temporarily fix the arch assembling sections which are hoisted in place, and each group of buckling ropes and one vertical supporting frame are distributed on the same vertical surface; each group of buckling ropes comprises a plurality of buckling ropes which are distributed on the same vertical surface from top to bottom, and the plurality of buckling ropes are distributed along the longitudinal bridge direction;
each vertical supporting frame in the cable crane is provided with a plurality of buckling rope pulleys for buckling rope installation from top to bottom, all buckling rope pulleys arranged on each vertical supporting frame are positioned on the same vertical surface, and each buckling rope is arranged on one buckling rope pulley;
the front end of each buckling rope in the rear tower is fixed on an arch frame assembling section which is hoisted in place, and the rear end of each buckling rope in the rear tower is fixed on a rear anchor;
the rear end of each buckling rope in the front tower is fixed on one arch frame assembly section, and the front end of each buckling rope in the front tower is fixed on a front anchor ingot.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: each tower comprises an assembled frame body, and each assembled frame body comprises a left vertical support frame and a right vertical support frame which are symmetrically distributed; the two vertical support frames in the rear tower are supported on the rear permanent support, the two vertical support frames in the rear tower are symmetrically arranged on the left side and the right side of the horizontal moving channel, and the clear distance between the two vertical support frames in the rear tower is larger than the width of the horizontal moving channel;
Each tower also comprises a tower base for mounting the bottom of the assembled frame body, wherein the tower base is horizontally arranged and is arranged along the transverse bridge direction, and the assembled frame body is positioned right above the tower base;
the bottom of each vertical support frame is provided with a tripod which is arranged on the tower base, and the bottom of the tripod is connected with the tower base positioned below the tripod in a hinging manner; a bottom distribution beam is arranged right below each tower base, and is horizontally arranged and arranged along the transverse bridge direction; the bottom distribution beam at the bottom of the rear tower is fixed on the rear permanent support, and the bottom distribution beam at the bottom of the front tower is fixed on the front permanent support.
Above-mentioned steel bow member is assembled and sideslip system for construction of upper supporting arch bridge, characterized by: a cable saddle for installing a working cable is arranged on each vertical supporting frame in the tower;
the number of the working ropes is two, the two working ropes are distributed along the longitudinal bridge direction and are symmetrically distributed above the left side and the right side of the pre-construction arch rib; each working cable is provided with a front lifting trolley and a rear lifting trolley, and the two lifting trolleys are positioned between the two towers; the hoisting device is used for hoisting the assembled segments of the paired arches of the four hoisting trolley groups in the cable crane;
The two working ropes are respectively a left working rope and a right working rope positioned on the right side of the left working rope, and the two vertical support frames in each tower are respectively a left support frame and a right support frame positioned on the right side of the left support frame; the left working cable is supported on the left supporting frames of the two towers, and the right working cable is supported on the right supporting frames of the two towers.
Meanwhile, the invention discloses a steel arch frame assembling and traversing method for the construction of the upper bearing arch bridge, which has the advantages of simple steps, reasonable design, convenient realization and good use effect, and is characterized in that: each spliced steel arch frame in the spliced steel arch frames comprises a vault splicing section and front and rear symmetrically arranged side splicing frames, the vault splicing section is connected between the two side splicing frames, each side splicing frame is formed by splicing a plurality of arch frame splicing sections arranged from bottom to top, and the vault splicing section is one arch frame splicing section; the assembled steel arch frame is an arch support frame;
when assembling and traversing the assembled steel arch, the method comprises the following steps:
Step one, constructing a bridge lower support structure and a steel arch support, and installing a translation slideway and a lifting device: respectively constructing two permanent supports and two side beam section supporting structures below each main beam in the constructed upper arch bridge to obtain a front side beam section supporting structure, a rear side beam section supporting structure, a front permanent support and a rear permanent support which are formed by construction;
simultaneously, constructing two steel arch supports in the arch support and traversing device to obtain a front support and a rear support which are formed by construction;
after the construction of the front side support and the rear side support is completed, respectively installing a translation slideway on the front side support and the rear side support which are formed by construction; simultaneously, installing one lifting device on each of the two steel arch supports formed by construction;
step two, construction of a cable crane and an arch frame sectional transferring device: constructing the horizontal moving channel on the rear side beam section supporting structure right behind the pre-constructed arch rib, and installing the assembling section moving device on the horizontal moving channel to obtain the arch frame sectional transferring device with the construction completed; simultaneously, constructing the cable crane, and supporting the rear tower in the cable crane on the rear permanent support at the rear side of the pre-construction arch rib;
Step three, assembling the steel arch frame: assembling the arch support frames, enabling the assembled arch support frames to be located under the pre-construction arch ribs, enabling the assembled arch support frames to be supported on one lifting device under the pre-construction arch ribs, and enabling the front end and the rear end of the arch support frames to be respectively supported on one lifting mechanism;
when the arched support frames are assembled, all the assembled steel arches in the arched support frames are assembled from first to second, and the assembling methods of all the assembled steel arches in the arched support frames are the same;
when assembling the arch support frame, the method comprises the following steps:
step 301, splicing the side splicing frames: symmetrically splicing the two side splicing frames of one splicing type steel arch frame in the arch support frame;
when any side splicing frame is assembled, a plurality of arch frame assembly sections forming the side splicing frame are assembled from bottom to top, and the process is as follows:
step 3011, assembling a first arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the currently assembled arch frame assembling sections to the position above the front end of the horizontal moving channel, and then the hoisting trolley of the cable crane is adopted to hoist and lower the arch frame assembling sections in place, so that the assembling process of the currently assembled arch frame assembling sections is completed;
In the step, the currently spliced arch frame splicing section is the lowest arch frame splicing section in the side splicing frame;
step 3012, assembling the last arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the last spliced arch frame splicing section to the position above the front end of the horizontal moving channel, then the hoisting trolley of the cable crane is adopted to hoist and lower the arch frame splicing section in place, and meanwhile, the arch frame splicing section which is put in place is connected with the arch frame splicing section which is positioned below the arch frame splicing section and is spliced, so that the splicing process of the current spliced arch frame splicing section is completed;
step 3013, repeating step 3012 one or more times, completing the assembling process of all arch frame assembling sections in the side splicing frames, and obtaining the side splicing frames after assembling;
step 302, splicing vault splicing sections: after the two side splicing frames of the spliced steel arch are spliced, adopting the arch frame segmentation transfer device to forward translate the arch crown splicing section to the position above the front end of the horizontal moving channel, then adopting the crane trolley of the cable crane to hoist and lower the arch crown splicing section in place, and simultaneously connecting the lower arch crown splicing section with the spliced two side splicing frames to finish the folding process of one spliced steel arch to obtain the spliced steel arch;
Step 303, judging the assembly completion of the arched support frame: judging whether the arched support frames are assembled or not, and when the arched support frames are assembled, completing the assembling process of the arched support frames, and entering a step four; otherwise, go to step 304;
step 304, splicing the next spliced steel arch frame: assembling the next assembled steel arch in the arch support frame according to the method in the steps 301 to 302, and connecting each arch assembling section in the assembled steel arch assembled at present with the assembled steel arch assembled at the moment;
step 305, assembling completion judgment of the arch support frame: judging whether the arched support frames are assembled or not, and when the arched support frames are assembled, completing the assembling process of the arched support frames, and entering a step four; otherwise, returning to step 304;
step four, jacking an arch support frame: the arch support frame is vertically lifted upwards by adopting the lifting device supported below the arch support frame until the arch support frame is lifted to the construction position of the arch rib firstly constructed;
step five, the arch support frame is lowered: the lifting device or the vertical moving device supported below the arch-shaped supporting frame is adopted to vertically downwards put the arch-shaped supporting frame in the fourth step until the front end and the rear end of the arch-shaped supporting frame are respectively supported on one translation slideway;
Step six, mounting a transverse movement driving device: the front transverse moving driving device and the rear transverse moving driving device are respectively installed to obtain the translation device with the installation completed, each pushing jack in the translation device and one transverse distribution beam in the arched support frame are arranged on the same vertical surface, and the pushing jacks prop against the transverse distribution beams on the same vertical surface;
seventh, transversely moving the arched support frame: synchronously driving the arch support frame to translate to one side of the rear construction arch rib along the transverse bridge by utilizing the front and rear transverse movement driving devices in the seventh step until the arch support frame is moved to the position right below the rear construction arch rib, simultaneously supporting the arch support frame on one lifting device right below the rear construction arch rib, and respectively supporting the front and rear ends of the arch support frame on one lifting mechanism;
step eight, jacking an arch support frame: and the lifting device supported below the arch support frame is adopted to vertically lift the arch support frame upwards until the arch support frame is lifted to the construction position of the rear construction arch rib.
The method is characterized in that: the two side splicing frames are respectively a front splicing frame positioned at the front side of the vault splicing section and a rear splicing frame positioned at the rear side of the vault splicing section;
The two bridge decks are respectively a front bridge deck supported below the front end of the main beam and a rear bridge deck supported below the rear end of the main beam, a front anchor ingot is arranged right in front of the front bridge deck, and a rear anchor ingot is arranged right behind the rear bridge deck;
each tower is provided with an arch temporary fixing mechanism, each arch temporary fixing mechanism comprises a left group of buckling ropes and a right group of buckling ropes which are symmetrically distributed and temporarily fix the arch assembling sections which are hoisted in place, and each group of buckling ropes and one vertical supporting frame are distributed on the same vertical surface; each group of buckling ropes comprises a plurality of buckling ropes which are distributed on the same vertical surface from top to bottom, and the plurality of buckling ropes are distributed along the longitudinal bridge direction;
each vertical supporting frame in the cable crane is provided with a plurality of buckling rope pulleys for buckling rope installation from top to bottom, all buckling rope pulleys arranged on each vertical supporting frame are positioned on the same vertical surface, and each buckling rope is arranged on one buckling rope pulley;
the front end of each buckling rope in the rear tower is fixed on an arch frame assembling section which is hoisted in place in the rear side assembling frame, and the rear end of each buckling rope in the rear tower is fixed on a rear anchor;
The rear end of each buckling rope in the front tower is fixed on one arch frame assembly section in the front side assembly frame, and the front end of each buckling rope in the front tower is fixed on a front anchor;
in step 3012, after the arch frame assembling section which is put in place is connected with the arch frame assembling section which is positioned below the arch frame assembling section and is assembled, the arch frame assembling section assembled in the step is also required to be temporarily fixed through one buckling rope;
the arch support and traversing device also comprises left and right symmetrically arranged girder dropping devices, and each girder dropping device is uniformly distributed on one steel arch support; each beam falling device comprises a front beam falling mechanism and a rear beam falling mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one beam falling mechanism; each beam falling mechanism comprises H temporary supports which are arranged on the same vertical surface from left to right along the transverse bridge direction and used for supporting the steel arch in the descending process, the temporary supports are vertically arranged, the structures and the sizes of the H temporary supports are the same, and the H temporary supports are uniformly arranged on the same horizontal plane; wherein H is a positive integer and H is less than or equal to M; each temporary support is uniformly distributed in one vertical groove;
All temporary supports on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the front support form a front girder falling support; all temporary supports on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the rear support form a rear girder falling support; the front side drop beam support is positioned right below one transverse distribution beam, and the rear side drop beam support is positioned right below the other transverse distribution beam; all temporary supports on each steel arch support form a steel arch girder falling support for synchronously supporting the steel arch;
the temporary support is a sand cylinder or a sand box;
after the jacking of the arch support frame is completed, installing the girder dropping device positioned right below the pre-construction arch rib, and respectively supporting the front end and the rear end of the arch support frame on one girder dropping mechanism; then, the lifting device supported below the arch-shaped supporting frame is removed;
in the fifth step, the vertical moving device is the beam falling device;
When the arch support frame is lowered in the fifth step, the arch support frame in the fourth step is vertically lowered by utilizing the beam falling device supported below the arch support frame;
after the jacking of the arch-shaped support frame is completed, installing the girder dropping device positioned right below the rear construction arch rib, and respectively supporting the front end and the rear end of the arch-shaped support frame on one girder dropping mechanism; and then, the lifting device supported below the arch-shaped supporting frame is removed.
The method is characterized in that: the number of the working ropes is two, the two working ropes are distributed along the longitudinal bridge direction and are symmetrically distributed above the left side and the right side of the pre-construction arch rib; each working cable is provided with a front lifting trolley and a rear lifting trolley, the two lifting trolleys are positioned between the two towers, and the two lifting trolleys are respectively a front sports car and a rear sports car positioned at the rear side of the front sports car; the hoisting device is used for hoisting the assembled segments of the paired arches of the four hoisting trolley groups in the cable crane;
the two working ropes are respectively a left working rope and a right working rope positioned on the right side of the left working rope, and the two vertical support frames in each tower are respectively a left support frame and a right support frame positioned on the right side of the left support frame; the left working cable is supported on the left supporting frames of the two towers, and the right working cable is supported on the right supporting frames of the two towers;
When the first arch frame assembling section is assembled in the step 3011 and the last arch frame assembling section is assembled in the step 3012, the arch frame sectional transferring device is adopted to move the currently assembled arch frame assembling section forward in a translation mode; when the front end of the arch frame assembly section moves above the front pier stud, the moved arch frame assembly section enters a hoisting area of the cable crane, and at the moment, the front sports car is connected with the front end of the moved arch frame assembly section to finish hoisting of the front end of the moved arch frame assembly section by the front sports car; then the arch frame sectional transferring device is utilized to continuously move the arch frame assembly sections forwards along the longitudinal bridge direction until the front ends of the moved arch frame assembly sections are moved to the position above the front pier stud, a rear sports car is connected with the rear ends of the moved arch frame assembly sections, and the rear sports car is used for hoisting the rear ends of the moved arch frame assembly sections; after the rear roadster is connected with the rear end of the movable arch frame assembling section, the hoisting process of the hoisting device of the cable crane on the arch frame assembling section is completed, and the arch frame assembling section is hoisted and lowered into place through the hoisting device of the cable crane.
Compared with the prior art, the invention has the following advantages:
1. The adopted segmental moving and hoisting system has reasonable structural design, simple and convenient construction and lower input construction cost.
2. The adopted tower has simple structure, reasonable design and lower investment and construction cost. The assembly type frame body is simple and convenient to install, and only the bottom distribution beam at the bottom of the frame body base is fixed on a permanent support (namely a tower foundation), and then the assembly type frame body is hinged with the frame body base.
3. The frame body base that adopts simple structure, processing preparation are convenient and input cost is lower to the frame body base can translate along the horizontal bridge to on the bottom distribution roof beam, thereby can adjust the laying position of pylon on permanent support through the frame body base is simple and convenient, and pylon position is adjustable and the adjustment is convenient, can satisfy the simple and convenient, the quick hoist and mount demand of cable crane.
4. The temporary arch frame fixing mechanism is arranged on the tower frame, so that the arch frame assembling sections which are hoisted in place in the assembled steel arch frames can be fastened and fixed, and the assembly and disassembly are simple and convenient, and the fixing is reliable.
5. The adopted tower is simple and convenient to use and operate and good in use effect, the permanent support can be installed on the permanent support after the construction of the permanent support is completed, the permanent support is used as a tower foundation, the support is stable and reliable, the additional construction of the tower foundation is not needed, the labor and time are saved, and meanwhile, the occupied construction space is small. The arch base of the constructed upper-bearing arch bridge arch rib is used as a tower foundation, the bottom of the assembled frame body is hinged to the frame body base, the frame body base is only required to be stably mounted on the tower foundation during actual mounting, and the installation is simple, convenient and stable and has low installation difficulty.
6. The arch frame sectional transferring device has the advantages of simple structure, reasonable design and lower investment and construction cost.
7. The adopted arch frame sectional transferring device utilizes a side beam section supporting structure for supporting the side beam section as a lower supporting structure of the horizontal moving channel, can directly and quickly move the arch frame assembly section to the lifting area of the cable crane, has small occupied space, is simple and convenient and quick to construct, does not need to specially construct the moving channel, saves labor and time, can greatly save cost, is not limited by construction occasions and site construction conditions, and has good using effect.
8. The horizontal moving channel has reasonable design, simple construction and good use effect, and only a longitudinal supporting beam is required to be erected on the supporting structure of the moving channel. For the horizontal migration device of being convenient for steadily, carry out horizontal migration fast, for the direction to horizontal migration device simultaneously, set up horizontal migration track at vertical supporting beam, the dismouting is simple and convenient and the input cost is lower.
9. The horizontal moving device is simple in structure, reasonable in design, convenient to use and operate, good in using effect, low in input cost and capable of being used repeatedly, the horizontal moving device comprises left and right groups of horizontal moving mechanisms which are symmetrically distributed, the movable arch frame assembly sections can be stably moved, and meanwhile the horizontal moving device is matched with the horizontal limiting piece, so that the moving process of the movable arch frame assembly sections is ensured to be safe and reliable.
10. The arch frame sectional transferring device is simple and convenient to use and operate and good in using effect, the horizontal moving channel is erected on the side beam section supporting structure, the horizontal moving device is arranged on the horizontal moving channel to enable the arch frame assembly sections to move stably, meanwhile, the front end of the horizontal moving channel is located on the front side of the rear tower of the cable crane, and the horizontal moving channel can penetrate through the rear tower, so that the arch frame assembly sections can be simply, conveniently and rapidly moved to the lifting area of the cable crane, the arch frame assembly section moving process is safe and reliable, the arch frame assembly sections can be simply, conveniently and rapidly moved into the lifting range of the cable crane one by one, the lifting difficulty of the cable crane is greatly reduced, and the lifting efficiency of the cable crane is accelerated.
11. The arch frame assembling device is reasonable in mechanism design, simple and convenient to use and operate and good in using effect, the arch frame sectional transferring device is matched with the cable crane, the two towers in the cable crane are reasonable in arrangement position and simple and convenient to construct, a horizontal moving channel is erected on a lateral beam section supporting structure, the horizontal moving device is arranged on the horizontal moving channel, the arch frame assembling sections can be stably moved, the arch frame assembling sections can be simply, conveniently and rapidly moved to the hoisting area of the cable crane, and the arch frame assembling section moving process is safe and reliable. And the cable crane is matched with the arch frame subsection transferring device to hoist and lower the moved arch frame splicing section in place, so that the steel arch frame splicing process can be completed simply, conveniently and rapidly.
12. The adopted steel arch frame has the advantages of simple structure, reasonable design, simple and convenient use and operation and good use effect, and the transverse steel pipes arranged at the front end and the rear end of the arch support frame are connected with the supported arch frame hinging seats in a hinging manner, so that the deformation requirement of the arch support frame can be effectively met; and simultaneously pushing the two arch abutment beams along the transverse bridge can simply and conveniently remove the arch support frame from the position right below the constructed arch rib so as to facilitate subsequent use or dismantling.
13. The adopted arch frame hinging seat is simple and convenient to use and good in use effect, the arch frame hinging seat is composed of a horizontal supporting seat and a supporting steel plate, the front end and the rear end of the arch support frame are respectively supported on the arch frame hinging seat, the front end and the rear end of the arch support frame are respectively provided with a transverse steel pipe, and the transverse steel pipes are connected with the supported arch frame hinging seat in a hinging mode, so that the deformation requirement of the arch support frame can be effectively met.
14. The arch frame hinge seat adopted has good using effect, huge horizontal force and vertical force born on the arch frame hinge seat are transmitted to the horizontal support and vertical force is transmitted to the vertical support, the arch frame hinge seat is hinged with the steel arch frame, and acting force born on the arch frame hinge seat can be transmitted to the arch frame.
15. The arch support and traversing device has the advantages of simple structure, reasonable design and lower investment and construction cost.
16. The steel arch support has reasonable structural design and good use effect, one steel arch support is respectively arranged under two constructed arch ribs, the steel arch support adopts two L-shaped supports which are symmetrically arranged front and back as temporary arch seats of steel arch feet, the L-shaped supports are arranged on permanent supports of the arch ribs, and the support is stable and reliable; and a plurality of vertical grooves are formed in the horizontal support of the L-shaped support, vertical jacks are placed in the vertical grooves to form a lifting mechanism, and the steel arch is adjusted to be in a supporting state or a transverse moving state through the lifting mechanism, so that the steel arch can be lifted and translated simply and conveniently.
17. The translation slide way is simple in structure, reasonable in design, simple and convenient to construct and good in using effect, and can be matched with a transverse mounting seat of the steel arch centering for use, so that the steel arch can be simply, conveniently and rapidly moved transversely.
18. The transverse moving device is simple in structure, reasonable in design, convenient to use and operate and good in using effect, the transverse moving distribution beam is arranged on the temporary arch base, the arch frame hinging base is firmly fixed at the top of the transverse distribution beam, the transverse distribution beam and the arch frame hinging base are integrally moved transversely during transverse moving, the transverse distribution beam is pushed by the transverse moving device to realize integral transverse moving, the practical operation is simple and convenient, the time is convenient, and the transverse moving process can be ensured to be simple, quick and stable.
19. The steel arch assembling and traversing system has reasonable structural design, simple and convenient use and operation and good use effect, the arch assembling device and the arch supporting and traversing device are matched for use, the arch segmentation transferring device in the arch assembling device simply, conveniently and rapidly moves the arch assembling sections to the hoisting area of the cable crane, and the cable crane lifts the moved arch assembling sections in place, so that the steel arch assembling process can be simply and rapidly completed; a steel arch support is respectively arranged right below two constructed arch ribs in the arch support and traversing device, an L-shaped support is adopted in the steel arch support as a temporary arch seat of a steel arch foot, a plurality of vertical grooves are formed in the horizontal support of the L-shaped support, vertical jacks are placed in the vertical grooves to form a lifting mechanism, the steel arch is adjusted to be in a supporting state or a traversing state through the lifting mechanism, and simultaneously the steel arch is traversed through the translating device, so that the purpose of constructing two arch ribs through one steel arch is achieved.
20. The construction method has the advantages of simple steps, reasonable design, simple and convenient construction, good use effect, safe and reliable construction process, and can simply, conveniently and rapidly complete the assembly and transverse movement processes of the steel arch.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic view of a longitudinal bridge structure of a steel arch splicing and traversing system of the present invention.
Fig. 2 is a schematic view of the transverse bridge direction structure of the arch frame sectional transferring device of the present invention.
Fig. 3 is an enlarged partial schematic view at a in fig. 2.
Fig. 4 is a schematic view of a longitudinal bridge structure of an upper arch bridge constructed in accordance with the present invention.
Fig. 5 is a view showing a longitudinal bridge usage state of the arch frame sectional transferring device according to the present invention.
Fig. 6 is a reference view of the rear end of the assembled arch segment of the present invention in use as it moves over the front abutment.
FIG. 7 is a schematic view of the layout positions of the arch segment transfer apparatus and the tower of the present invention.
Fig. 8 is a schematic view of the longitudinal bridge structure of the arch according to the invention.
Fig. 9 is a schematic view of the transverse bridge structure of the arch of the present invention.
Fig. 10 is a schematic diagram of a connection state between a tripod at the bottom of a vertical support frame and a base of a frame body according to the present invention.
Fig. 11 is a schematic view of a longitudinal bridge connection of the inventive leg segments to the steel arch segments.
Fig. 12 is a schematic plan view of an assembled frame according to the present invention.
FIG. 13 is a block flow diagram of a method of the present invention for assembling and traversing a steel arch.
Fig. 14 is a schematic view showing a longitudinal bridge supporting state of the steel truss of the present invention.
Fig. 15 is a schematic view of the structure of the inventive abutment segments, the arch bridge, the abutment beams and the temporary abutment.
Fig. 16 is a schematic view of the structure of the arch hinge base, the transverse steel tube and the temporary arch base of the present invention.
Fig. 17 is a schematic structural view of an arch hinge base of the present invention.
Fig. 18 is a schematic structural view of the horizontal support base of the present invention.
Fig. 19 is a schematic structural view of the steel pipe limiting mechanism of the present invention.
Fig. 20 is a schematic view of the transverse bridge structure of the load-bearing steel arch of the present invention.
Fig. 21 is a schematic view of the longitudinal bridge construction of the inventive rib segment.
Fig. 22 is a schematic plan view of an arch support and traversing apparatus of the present invention.
Fig. 23 is a schematic elevation view of the L-shaped support, lifting mechanism and beam dropping mechanism of the present invention.
Fig. 24 is a schematic view showing the structure of the front side bracket of the steel truss of the present invention in a supported state.
Fig. 25 is a schematic view showing the structure of the front side bracket during the traversing process of the steel truss according to the present invention.
Reference numerals illustrate:
100-an arched support frame; 1-assembling steel arch frames; 1-arch frame assembling sections;
1-10-arch springing segments; 1-11, a transverse steel pipe; 1-12-lower connecting rod;
1-13-upper connecting rod; 1-14-middle connecting rod; 1-2-steel arch segments;
1-21—a bottom chord; 1-22-upper chord; 1-23-web members;
2-arch ribs; 3-a middle beam section; 3-1-a longitudinal support beam;
4-side beam sections; 5-vertical upright posts; 6-permanent support;
7, supporting pier columns; 7-1, vertical pier studs; 7-2, a capping beam;
8-abutment; 9-a horizontal limiting piece; 10-a horizontal movement mechanism;
10-1, a frame; 10-2, a travelling wheel; 10-3-upper support plate;
11-a horizontal movement track; 12-a track support beam; 13, a support pad steel plate;
14-limiting ropes; 15-1-front anchor; 15-2-rear anchor ingot;
16-a vertical connecting bolt; 17-tower;
17-1, a vertical supporting frame; 17-2-transverse connecting beams; 17-3, a frame base;
17-31-a horizontal base; 17-32, a hinge seat; 17-4-tripod;
17-41-vertical columns; 17-42-side brackets; 17-5-inner cable;
17-6-cable saddle; 17-7—a bottom distribution beam; 17-8, working rope;
17-10-buckling rope; 17-11, a buckling rope pulley;
17-12 horizontal guiding steel plates; 17-13-diagonal stiffening plates; 17-14-outer cable;
17-15-a scissors support; 18-lower support steel plate; 19-a leveling layer;
20-an arch hinging seat; 20-1-supporting steel plates; 20-2-a horizontal bottom plate;
20-3, a vertical supporting plate; 20-4 parts of vertical steel plates; 20-5, a transverse steel plate;
20-6, oblique steel plates; 20-7, arc limiting depression bars; 20-8, limiting steel plate strips;
21-front sports car; 22-rear sports car; 23-arch bridge;
24-adjusting bolts; 25-a bolt mounting seat; 26-lower ear plate;
27-upper ear plate; 28-a horizontal connecting bolt; 29-a horizontal hinge shaft;
30-L-shaped support; 30-1, a horizontal support; 30-2, a vertical support;
31-a vertical groove; 32-vertical jack; 33-a translation slide;
34-a sand cylinder; 35-a traction mechanism; 36-a traction rope;
37-a reaction frame; 38-a vertical baffle; 39—front side foundation;
40—a rear foundation; 41-pushing jack; 42-embedding steel plates;
43-triangular stiffening plates.
Detailed Description
The steel arch assembling and traversing system for the construction of the upper-bearing arch bridge shown in fig. 1 comprises an arch assembling device for assembling the steel arch and an arch supporting and traversing device for supporting and traversing the assembled steel arch;
referring to fig. 4, the steel arch is an arch support 100 for constructing an arch rib 2 of the constructed upper arch bridge, the front end and the rear end of the arch rib 2 are respectively supported on a permanent support 6, and the permanent support 6 is a reinforced concrete support; the arch rib 2 is arranged along the longitudinal bridge direction and is a reinforced concrete arch ring, the arch rib 2 is supported right above the arch support frame 100, and the arch support frame 100 is arranged along the longitudinal bridge direction;
the constructed upper-bearing arch bridge comprises a left arch rib 2 and a right arch rib 2 which are symmetrically arranged, wherein a main beam is uniformly distributed right above each arch rib 2; one arch rib 2 in the constructed upper-bearing arch bridge is a pre-construction arch rib, and the other arch rib 2 is a post-construction arch rib which is constructed after the pre-construction arch rib is constructed;
As shown in fig. 4, the front and rear ends of each main girder are respectively supported on a bridge abutment 8, the main girders are horizontally arranged and comprise a middle girder section 3 supported on an arch rib 2 and two side girder sections 4 respectively positioned on the front and rear sides of the middle girder section 3, the middle girder section 3 is connected between the two side girder sections 4 and all the three are arranged along the longitudinal bridge direction, and the middle girder section 3 is fixedly connected with the arch rib 2 through a plurality of vertical upright posts 5 arranged along the longitudinal bridge direction from front to rear; a plurality of support piers 7 which are vertically distributed are distributed from front to back along the longitudinal bridge direction below each side beam section 4, the support piers 7 are reinforced concrete piers, each side beam section 4 is supported on one abutment 8 and a plurality of support piers 7, and one abutment 8 and a plurality of support piers 7 supported below each side beam section 4 form a side beam section support structure; the two side beam section supporting structures below each main beam are respectively a front side beam section supporting structure positioned at the front side of the arch rib 2 and a rear side beam section supporting structure positioned at the rear side of the arch rib 2, and the two permanent supports 6 are respectively a front permanent support positioned below the front end of the arch rib 2 and a rear permanent support positioned below the rear end of the arch rib 2;
The arch support 100 is an assembled steel arch 1 or is formed by assembling a plurality of assembled steel arches 1 which are arranged from left to right along a transverse bridge direction, each assembled steel arch 1 is an arch, each assembled steel arch 1 is arranged along a longitudinal bridge direction, and each assembled steel arch 1 is formed by splicing a plurality of arch assembling sections 1-1 which are arranged from front to back along the longitudinal bridge direction;
the arch frame assembling device comprises a cable crane for hoisting the arch frame assembling sections 1-1 of the assembled steel arch frame 1 and an arch frame sectional transferring device for moving the arch frame assembling sections 1-1 one by one;
as shown in fig. 1, 2 and 3, the arch frame sectional transferring device comprises an assembling section moving device for horizontally moving the arch frame assembling sections 1-1 one by one and a horizontal moving channel for horizontally moving the assembling section moving device, wherein the horizontal moving channel is horizontally arranged and is arranged along a longitudinal bridge direction;
the horizontal moving channel is arranged on the rear side beam section supporting structure right behind the pre-construction arch rib, and the rear side beam section supporting structure right behind the pre-construction arch rib is a moving channel supporting structure; the horizontal moving channel comprises a longitudinal supporting beam 3-1 supported on the moving channel supporting structure, the assembly section moving device is a horizontal moving device which can drive the moved arch frame assembly section 1-1 to synchronously move in the process of moving the longitudinal supporting beam 3-1 forwards and backwards, and the longitudinal supporting beam 3-1 is horizontally arranged and is arranged along the longitudinal bridge direction; the horizontal moving device is arranged on the longitudinal supporting beam 3-1, and the movable arch frame assembly section 1-1 is horizontally supported on the horizontal moving device; the rear end of the longitudinal support beam 3-1 is an abutment support end supported on an abutment 8 in the moving channel support structure, and the front end of the longitudinal support beam 3-1 is a hoisting end; a horizontal limiting piece 9 for limiting the horizontal moving device is arranged on the lifting end of the longitudinal supporting beam 3-1;
The cable crane comprises a front tower 17, a rear tower 17, working cables 17-8 arranged on the two towers 17 and a trolley capable of moving back and forth along the working cables 17-8 and hoisting the arch frame assembly section 1-1, wherein the trolley is arranged on the working cables 17-8 and is positioned between the two towers 17, and the trolley is positioned above the pre-construction arch rib; the two towers 17, the pre-construction arch rib and the longitudinal supporting beams 3-1 are positioned on the same vertical surface, and the two towers 17 are respectively a front tower positioned at the front side of the pre-construction arch rib and a rear tower positioned at the rear side of the pre-construction arch rib;
the support pier column 7 at the forefront side in the rear side beam section support structure is a front pier column, the lifting end of the longitudinal support beam 3-1 is positioned at the front side of the rear tower, the lifting end of the longitudinal support beam 3-1 is supported on the front pier column, and the longitudinal support beam 3-1 is a horizontal support beam penetrating through the middle of the rear tower; the rear tower and the front pier stud are both supported on the rear permanent support, and the front pier stud is positioned at the front side of the rear tower;
as shown in fig. 14, 15, 22, 23, 24 and 25, the arch support and traversing device includes a translation device for translating the arch support 100 along a transverse bridge, two lifting devices symmetrically arranged on the left and right and for moving the arch support 100 up and down, and two steel arch supports symmetrically arranged on the left and right and for supporting the arch support 100, each of which is located under one of the arch ribs 2; a transverse distribution beam is arranged below the front end and the rear end of the arched support frame 100, and is horizontally arranged and is arranged along the transverse bridge direction; the bottoms of the front end and the rear end of the arched support frame 100 are respectively provided with a transverse installation seat, the transverse installation seats are horizontally distributed and are distributed along the transverse bridge direction, and each transverse distribution beam is arranged at the bottom of one transverse installation seat;
Each steel arch support comprises a front temporary arch seat and a rear temporary arch seat which are symmetrically distributed, wherein the two temporary arch seats are distributed along the transverse bridge direction and are respectively a front support for supporting the front end of the arch support 100 and a rear support for supporting the rear end of the arch support 100;
each of the temporary abutments being an L-shaped abutment 30; the L-shaped support 30 comprises a horizontal support 30-1 and a vertical support 30-2 which is arranged above the outer side of the horizontal support 30-1, the horizontal support 30-1 and the vertical support 30-2 are both arranged along the transverse bridge direction and are reinforced concrete supports, and the horizontal support 30-1 and the vertical support 30-2 in each temporary arch support are cast into a whole; m vertical grooves 31 distributed on the same vertical surface are formed in each horizontal support 30-1, and the M vertical grooves 31 are identical in structure and size and distributed from left to right along a transverse bridge; wherein M is a positive integer and M is more than or equal to 3; each of the vertical grooves 31 is a cubic groove; m vertical grooves 31 in each temporary abutment are located inside the vertical supports 30-2;
the front supports of the two steel arch supports form a front support, and the rear supports of the two steel arch supports form a rear support; all the vertical grooves 31 in the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical grooves 31 in the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction;
Each lifting device is uniformly distributed on one steel arch support; each lifting device comprises a front lifting mechanism and a rear lifting mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one lifting mechanism; each lifting mechanism comprises N vertical jacks 32 which are distributed on the same vertical surface from left to right along the transverse bridge direction, the N vertical jacks 32 are identical in structure and size and are uniformly distributed on the same horizontal surface, and the vertical jacks 32 are hydraulic jacks distributed vertically; wherein N is a positive integer, and N is more than or equal to 2 and less than or equal to M; each vertical jack 32 is uniformly distributed in one vertical groove 31;
all the vertical jacks 32 on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical jacks 32 on the front support form a front jacking device; all the vertical jacks 32 on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical jacks 32 on the rear support form a rear jacking device; the front side jacking device is positioned right below one transverse distribution beam, and the rear side jacking device is positioned right below the other transverse distribution beam; all the vertical jacks 32 on each steel arch support form a steel arch jacking device for synchronously jacking the arch support 100;
The translation device comprises a front translation slideway 33 and a rear translation slideway which are symmetrically arranged and used for the translation of the transverse installation seat, and a front transverse driving device and a rear transverse driving device which synchronously drive the arched support frame 100 to translate along the transverse bridge direction, the two transverse driving devices are symmetrically arranged, and the translation slideway 33 is horizontally arranged and is arranged along the transverse bridge direction; each transverse moving driving device comprises a pushing jack 41 for horizontally pushing the transverse distribution beam along the transverse bridge direction, wherein the pushing jacks 41 are horizontally arranged and are arranged along the transverse bridge direction; each pushing jack 41 and one transverse distribution beam are arranged on the same vertical surface, and the pushing jacks 41 prop against the transverse distribution beams on the same vertical surface;
the two translation slides 33 are respectively a front slide mounted on the front support and a rear slide mounted on the rear support; a horizontal slideway for the horizontal installation seat to translate is arranged on the inner side wall of each vertical support 30-2, and the horizontal slideway is arranged along the transverse bridge direction and is positioned below the horizontal installation seat; the horizontal slides mounted on the two vertical supports 30-2 in the front support are arranged on the same horizontal line and form the front slide, and the horizontal slides mounted on the two vertical supports 30-2 in the rear support are arranged on the same horizontal line and form the rear slide.
Wherein the permanent support 6 is a abutment for supporting the rib 2.
In this embodiment, the two bridge abutments 8 below the pre-construction arch rib are respectively a front bridge abutment supported below the front end of the main beam and a rear bridge abutment supported below the rear end of the main beam, a front anchor 15-1 is arranged right in front of the front bridge abutment, and a rear anchor 15-2 is arranged right behind the rear bridge abutment;
each tower 17 is provided with an arch temporary fixing mechanism, each arch temporary fixing mechanism comprises a left group of buckling ropes 17-10 and a right group of buckling ropes which are symmetrically distributed and temporarily fix the suspended arch assembling section 1-1, and each group of buckling ropes 17-10 and one vertical supporting frame 17-1 are distributed on the same vertical surface; each group of buckling ropes 17-10 comprises a plurality of buckling ropes 17-10 which are distributed on the same vertical surface from top to bottom, and the plurality of buckling ropes 17-10 are distributed along the longitudinal bridge direction;
a plurality of buckling rope pulleys 17-11 for installing buckling ropes 17-10 are arranged on each vertical supporting frame 17-1 in the cable crane from top to bottom, all the buckling rope pulleys 17-11 arranged on each vertical supporting frame 17-1 are positioned on the same vertical plane, and each buckling rope 17-10 is arranged on one buckling rope pulley 17-11;
The front end of each buckling rope 17-10 in the rear tower is fixed on an arch frame assembling section 1-1 which is hoisted in place, and the rear end of each buckling rope 17-10 in the rear tower is fixed on a rear anchor 15-2;
the rear end of each buckling rope 17-10 in the front tower is fixed on one arch frame assembly section 1-1, and the front end of each buckling rope 17-10 in the front tower is fixed on a front anchor 15-1.
In this embodiment, the rear anchor 15-2 and the front anchor 15-1 are reinforced concrete anchors.
As shown in fig. 8, 9 and 10, each tower 17 includes an assembled frame body, and the assembled frame body includes two vertical supporting frames 17-1 symmetrically arranged left and right; two vertical support frames 17-1 in the rear tower are supported on the rear permanent support, the two vertical support frames 17-1 in the rear tower are symmetrically arranged on the left side and the right side of the horizontal moving channel, and the clear distance between the two vertical support frames 17-1 in the rear tower is larger than the width of the horizontal moving channel.
In this embodiment, two vertical supports 17-1 of the front tower are supported on the front permanent support.
In this embodiment, two ends of each buckling rope 17-10 are respectively located at the front side and the rear side of the assembled frame body;
the heights of the two ends of each buckling rope 17-10 are lower than the installation height of the buckling rope pulley 17-11 on which the buckling rope 17-10 is installed. Therefore, each buckling rope 17-10 is in an inverted V shape, and the two groups of buckling ropes 17-10 can fasten and fix the arch frame assembling sections 1-1 which are hoisted in place in the assembled steel arch frame 1, and the assembly and disassembly are simple and convenient, and the fixation is reliable.
In this embodiment, each tower 17 further includes a tower base 17-3 for mounting at the bottom of the assembled frame, where the tower base 17-3 is horizontally disposed and is disposed along the transverse bridge direction, and the assembled frame is located right above the tower base 17-3.
With reference to fig. 1 and 4, the front and rear ends of the arch rib 2 are respectively supported on a permanent support 6, and the permanent support 6 is a reinforced concrete support; the frame base 17-3 is horizontally supported on one of the permanent supports 6, and the permanent support 6 supported by the frame base 17-3 is a tower foundation. In this embodiment, the front permanent support and the rear permanent support are both tower foundations.
During actual installation, the bottoms of the two vertical support frames 17-1 in the assembled frame body are supported on the frame body base 17-3, and the bottoms of the vertical support frames 17-1 are connected with the frame body base 17-3 in a hinged mode.
As shown in fig. 9, the assembled beam body further includes a plurality of transverse connection beams 17-2 arranged from top to bottom, and the two vertical supports 17-1 are integrally connected by the plurality of transverse connection beams 17-2.
In this embodiment, the two vertical supporting frames 17-1 are integrally connected by the upper and lower transverse connecting beams 17-2.
The two transverse connection beams 17-2 are respectively an upper connection beam connected between the upper parts of the two vertical support frames 17-1 and a middle connection beam connected between the middle parts of the two vertical support frames 17-1. In this embodiment, a scissor support 17-15 is further disposed between the two vertical support frames 17-1, and the scissor support 17-15 is located at the bottom of the upper connecting beam.
As shown in fig. 12, in order to improve the bearing capacity of the vertical supporting frame 17-1, the vertical supporting frame 17-1 is a supporting column formed by assembling a plurality of straight rods, and the supporting column is a cubic column. The transverse connecting beam 17-2 is a horizontal connecting beam formed by assembling a plurality of straight rods. In this embodiment, the transverse connection beam 17-2 is a cubic beam.
As shown in fig. 8 and 10, the bottom of each vertical supporting frame 17-1 is provided with a tripod 17-4 mounted on the tower base 17-3, and the bottom of the tripod 17-4 is connected with the tower base 17-3 below the tripod in a hinged manner; a bottom distribution beam 17-7 is arranged right below each tower base 17-3, and the bottom distribution beams 17-7 are horizontally arranged and are arranged along the transverse bridge direction; the bottom distribution beam 17-7 at the bottom of the rear tower is fixed to the rear permanent support and the bottom distribution beam 17-7 at the bottom of the front tower is fixed to the front permanent support.
In this embodiment, the tripod 17-4 is disposed vertically and its longitudinal width gradually decreases from top to bottom. The bottom of the vertical support frame 17-1 can be simply, conveniently and rapidly connected with the frame base 17-3 through the tripod 17-4, the bottom of the tripod 17-4 is simply and conveniently connected with the frame base 17-3, and meanwhile, the structure of the frame base 17-3 can be simplified.
In actual use, the tripod 17-4 is a triangular support frame formed by assembling a plurality of straight rods.
For the purpose of stable structure and simple connection, each tripod 17-4 comprises a vertical support fixed below the middle part of the vertical support 17-1 and front and rear side supports 17-42 symmetrically arranged on two sides of the vertical support, wherein the vertical support consists of a plurality of vertical columns 17-41 arranged on the same vertical surface from left to right. In this embodiment, the vertical support is composed of two vertical columns 17-41 symmetrically arranged at the bottom of the same vertical support frame 17-1. Both side brackets 17-42 are plane trusses, the upper parts of which are fixed to the bottom of the vertical supporting frame 17-1 and the bottoms of which are fixed to the vertical brackets.
In this embodiment, each vertical column 17-41 is connected with the frame base 17-3 in a hinged manner. When the connection is actually carried out, the connection between the bottom of the vertical support frame 17-1 and the frame base 17-3 can be completed only by hinging each vertical upright post 17-41 with the frame base 17-3, so that the connection is simple and convenient, and the structure of the vertical support frame 17-1 and the frame base 17-3 can be effectively simplified.
As shown in fig. 9 and 10, a bottom distribution beam 17-7 is arranged right below the frame base 17-3, and the bottom distribution beam 17-7 is horizontally arranged and is arranged along the transverse bridge direction; the bottom distribution beams 17-7 are fixed to the tower foundation.
In order to ensure simple and reliable connection, the bottom distribution beam 17-7 is fixed on the tower foundation by a plurality of anchor bolts, and the anchor bolts are vertically distributed. Wherein the bottom distribution beam 17-7 at the bottom of the rear tower is fixed to the rear permanent support by a plurality of anchors, and the bottom distribution beam 17-7 at the bottom of the front tower is fixed to the front permanent support by a plurality of anchors.
In this embodiment, the bottom distribution beam 17-7 is formed by splicing a plurality of i-beams arranged side by side on the same horizontal plane. Each I-steel is horizontally arranged and is arranged along the transverse bridge direction.
In order to further increase the stability and the bearing effect of the bottom distribution beam 17-7, the front and rear sides of the bottom distribution beam 17-7 are symmetrically arranged on the inclined stiffening plates 17-13.
In this embodiment, the frame base 17-3 includes a horizontal base 17-31 and a hinge base 17-32 mounted on the horizontal base 17-31, the horizontal base 17-31 is horizontally supported on the bottom distribution beam 17-7, the bottom of the tripod 17-4 is connected with the hinge base 17-32 located below the tripod in a hinge manner, and specifically, the bottom of each vertical upright 17-41 in the tripod 17-4 is connected with the hinge base 17-32 located below the tripod in a hinge manner.
Therefore, the frame base 17-3 has simple and convenient structure and stable support, and the frame base 17-3 is connected with the tripod 17-4 conveniently.
In this embodiment, as shown in fig. 9 and 10, the horizontal base 17-31 is an i-steel that is arranged horizontally, the web of the horizontal base 17-31 is arranged horizontally, and the hinge base 17-32 is fixed on the web of the horizontal base 17-31. I-steel is adopted as the horizontal base 17-31, so that the structure of the horizontal base 17-31 can be effectively simplified, and the stability and the supporting strength of the horizontal base 17-31 can be ensured.
In this embodiment, the horizontal base 17-31 is a sliding seat capable of horizontally moving along the transverse bridge direction at the bottom distribution beam 17-7, and the bottom distribution beam 17-7 is provided with a guide member for guiding the horizontal base 17-31, and the guide member is horizontally arranged and is arranged along the transverse bridge direction. Therefore, in the actual use process, the invention can simply, conveniently and rapidly adjust the arrangement position of the tower frame on the basis, and the adjustment process is safe and reliable.
In this embodiment, the guide member is a horizontal guide steel plate 17-12 horizontally fixed to the bottom distribution beam 17-7, and the horizontal guide steel plate 17-12 is a rectangular steel plate.
And, the said horizontal guiding steel plate 17-12 is welded and fixed on the bottom distributing beam 17-7, thus the actual fixed connection, firm.
In this embodiment, the horizontal base 17-31 includes a web plate that is horizontally arranged and two wing plates that are symmetrically arranged on two sides of the web plate, and both the wing plates are vertically arranged. The horizontal guide steel plates 17-12 are clamped between two wing plates of the horizontal base 17-31, so that the actual installation is simple and convenient, and the guide effect is good.
As shown in fig. 8 and 9, each of the vertical supports 17-1 is provided with a cable saddle 17-6 for mounting the working cable 17-8, and the cable saddle 17-6 is provided with a working cable pulley for mounting the working cable 17-8. For reliable connection, two cable saddles 17-6 in the assembled frame body are fastened and connected through a top connecting beam.
In order to further improve the connection strength between the two vertical supporting frames 17-1 in the assembled frame body, the assembled frame body further comprises two inner cable ropes 17-5 which are distributed in a crossed mode, the two inner cable ropes 17-5 are located below the middle connecting beam and between the two vertical supporting frames 17-1, the upper portion of each inner cable rope 17-5 is fixed on the inner side wall of the vertical supporting frame 17-1, and the bottom of each inner cable rope 17-5 is fixed on the horizontal base 17-31, so that stable connection between the assembled frame body and the frame body base 17-3 can be further ensured, and connection reliability between the assembled frame body and the frame body base 17-3 is ensured.
As shown in fig. 4, the constructed upper-bearing arch bridge comprises an arch rib 2 and a main beam positioned right above the arch rib 2, wherein the arch rib 2 and the main beam are arranged along the longitudinal bridge direction, the front end and the rear end of the main beam are respectively supported on a bridge abutment 8, the main beam is horizontally arranged and comprises a middle beam section 3 supported on the arch rib 2 and two side beam sections 4 respectively positioned on the front side and the rear side of the middle beam section 3, the middle beam section 3 is connected between the two side beam sections 4 and is arranged along the longitudinal bridge direction, and the middle beam section 3 and the arch rib 2 are fixedly connected through a plurality of vertical upright posts 5 arranged along the longitudinal bridge direction from front to rear; every lateral beam section 4 below has all laid a plurality of support pier studs 7 that are vertical to laying from front to back along the longitudinal bridge direction, support pier stud 7 is reinforced concrete pier stud, every lateral beam section 4 all supports in one abutment 8 and a plurality of on supporting pier stud 7, every abutment 8 and a plurality of that lateral beam section 4 below supported support pier stud 7 all constitutes a lateral beam section bearing structure.
During actual construction, two permanent supports 6 are constructed, an assembled steel arch 1 is erected between the two permanent supports 6, an arch frame assembled section 1-1 of the assembled steel arch 1 is hoisted by adopting a cable crane, and a tower 17 is a crane tower of the cable crane.
After the construction of the permanent support 6 is completed, the tower 17 can be mounted on the permanent support 6. When the tower 17 is installed, only the bottom distribution beam 17-7 at the bottom of the frame base 17-3 is fixed on the permanent support 6, and then the assembled frame is hinged with the frame base 17-3, so that the actual installation is very simple and convenient, and the arrangement position of the tower 17 on the permanent support 6 can be adjusted simply and conveniently through the frame base 17-3. Meanwhile, in the process of hoisting the arch frame assembly sections 1-1 of the assembled steel arch frame 1 by adopting the cable crane, the arch frame assembly sections 1-1 which are hoisted in place in the assembled steel arch frame 1 can be fastened and fixed by two groups of buckling cables 17-10, and the assembled steel arch frame is simple and convenient to assemble and disassemble and reliable to fix. In addition, the tower 17 takes the permanent support 6 as a tower foundation, so that the support is stable and reliable, the additional construction of the tower foundation is not needed, the labor and time are saved, and the occupied construction space is small.
In order to further improve the stability of the tower 17, the top of each vertical supporting frame 17-1 is fixed with the anchor ingot 15 through an outer cable 17-14, the outer cable 17-14 and the inner cable 17-5 are fixed cables, and the cable saddle 17-6 is provided with a fixed cable pulley for installing the outer cable 17-14.
In this embodiment, the support pier 7 located at the rearmost side of the front side beam section support structure is a rear pier, and both the rear pier and the front tower are supported on the front permanent support; the rear pier is located at the rear side of the front tower.
The rear pier stud and the front permanent support are integrally cast, and the front pier stud and the rear permanent support are integrally cast.
The two side beam sections 4 are respectively a front side beam section positioned on the front side of the middle beam section 3 and a rear side beam section positioned on the rear side of the middle beam section 3, the front pier is supported below the joint between the middle beam section 3 and the rear side beam section, and the rear pier is supported below the joint between the middle beam section 3 and the front side beam section.
In this embodiment, the abutment 8 is a reinforced concrete abutment, the vertical columns 5 are reinforced concrete columns, each side beam section 4 and the side beam section supporting structure supported below form an approach bridge of the constructed upper arch bridge, the middle beam section 3 and the arch rib 2 and a plurality of vertical columns 5 connected between the two form a main bridge of the constructed upper arch bridge, and the constructed upper arch bridge is formed by connecting the main bridge with the approach bridges connected with the front and rear main bridges. One supporting pier 7 is arranged below the connecting position between each side beam section 4 and the middle beam section 3. Abutment 8 and a plurality of in every lateral beam section bearing structure support pier 7 equipartition locate on same vertical face.
As shown in fig. 5, in this embodiment, the moving walkway support structure is the side beam segment support structure, i.e., the rear side beam segment support structure, located at the rear side of the middle beam segment 3. In actual use, the movement channel support structure may also be the side beam section support structure located on the front side of the middle beam section 3.
In this embodiment, the horizontal limiting member 9 is a limiting stop arranged horizontally.
In order to ensure that the horizontal limiting piece 9 limits the horizontal moving device and does not influence the horizontal moving process of the moved arch assembling section 1-1, the horizontal limiting piece 9 is positioned below the moved arch assembling section 1-1.
In this embodiment, the limit stop is a cube stop fixed above the lifting end of the longitudinal support beam 3-1.
As shown in fig. 2, in order to ensure smooth movement of the moved arch frame assembly segments 1-1 and smooth placement of the moved arch frame assembly segments 1-1 on the horizontal movement device during movement, the horizontal movement device includes two sets of horizontal movement mechanisms 10 symmetrically arranged left and right, each set of horizontal movement mechanisms 10 includes a plurality of horizontal movement mechanisms 10 arranged front to back along a longitudinal bridge; the two groups of horizontal moving mechanisms 10 are symmetrically supported below the left side and the right side of the moved arch frame assembling segment 1-1.
When the moving is actually performed, the moved arch frame assembly segments 1-1 are stably placed on the two groups of horizontal moving mechanisms 10.
In this embodiment, each group of horizontal moving mechanisms 10 includes two front and rear horizontal moving mechanisms 10, and the two horizontal moving mechanisms 10 are respectively supported below the front and rear sides of the moved arch frame assembly section 1-1. In actual use, the number of the horizontal moving mechanisms 10 included in each group of the horizontal moving mechanisms 10 and the layout positions of the horizontal moving mechanisms 10 can be respectively adjusted according to specific needs.
As shown in fig. 2 and 3, in order to facilitate the smooth and rapid horizontal movement of the horizontal movement mechanism 10 and guide the horizontal movement mechanism 10, the horizontal movement channel further includes two horizontal movement rails 11 symmetrically disposed on the left and right and horizontally moving the horizontal movement mechanism 10, and the horizontal movement rails 11 are horizontally disposed and are disposed along the longitudinal bridge direction; the two horizontal moving rails 11 are symmetrically arranged above the left side and the right side of the longitudinal support beam 3-1;
each group of the horizontal moving mechanisms 10 in the horizontal moving device is mounted on the same horizontal moving rail 11.
In this embodiment, the longitudinal support beam 3-1 is formed by splicing a plurality of horizontal support plates, wherein the plurality of horizontal support plates are all horizontally arranged and are all arranged along the longitudinal bridge direction, and the plurality of horizontal support plates are arranged on the same horizontal plane from left to right along the transverse bridge direction; the plurality of horizontal support plates are supported on the moving channel support structure. In actual construction, the horizontal support plates are small in width, light in weight and convenient to assemble and disassemble.
In order to ensure the supporting strength, the horizontal moving channel further comprises two rail supporting beams 12 which are symmetrically arranged at left and right and are used for supporting the horizontal moving rail 11, wherein the rail supporting beams 12 are horizontally arranged and are arranged along the longitudinal bridge direction; each of the rail support beams 12 is supported directly under one of the horizontal moving rails 11.
In this embodiment, the number of the horizontal limiting members 9 is two, and each horizontal limiting member 9 is located right in front of one horizontal moving rail 11.
In order to ensure the safety and reliability of the moving process, the movable arch frame assembling section 1-1 is prevented from moving forward to the outer side of the horizontal moving channel, the arch frame segmented transferring device further comprises a limiting rope 14 for limiting the movable arch frame assembling section 1-1, the limiting rope 14 is positioned above the horizontal moving channel, the limiting rope 14 is positioned behind the assembling section moving device, the rear end of the limiting rope 14 is fixed on a rear anchor 15-2 or an anchoring foundation positioned right behind the horizontal moving channel, and the front end of the limiting rope 14 is fixed on the movable arch frame assembling section 1-1. In actual use, the movable arch centering assembly segment 1-1 can be effectively prevented from running forward out of control by the limiting ropes 14, and the horizontal moving channel is punched out.
In this embodiment, the rear end of the limiting rope 14 is fixed on the rear anchor 15-2. An anchor for binding and fixing the rear end of the limiting rope 14 is arranged on the rear anchor rod 15-2.
In this embodiment, the support pier 7 supported by the front end of the longitudinal support beam 3-1 is a front pier; the two permanent supports 6 are respectively a front permanent support supported below the front end of the arch rib 2 and a rear permanent support supported below the rear end of the arch rib 2, the front end of the longitudinal support beam 3-1 is positioned above the rear permanent support, and the front pier is supported on the rear permanent support.
The two permanent supports 6 are arch seats for supporting the arch rib 2, the front pier column is supported on the rear permanent support, so that the support stability of the front pier column can be effectively ensured, meanwhile, as the front pier column is supported below the joint between the middle beam section 3 and one side beam section 4, the support strength of the supported middle beam section 3 and side beam section 4 can be effectively ensured, and the rear permanent support is directly used as a support foundation of the front pier column, the construction of the foundation of the front pier column is omitted, and the labor and time are saved.
When the assembly type steel arch 1 is assembled in actual construction, the arch frame assembly sections 1-1 of the assembly type steel arch 1 are hoisted in place one by adopting a cable crane for assembly.
As shown in fig. 5 and 7, a tower 17 is arranged on the rear permanent support, and the tower 17 is a crane tower of a cable crane for hoisting the movable arch assembly section 1-1; the tower 17 is positioned right behind the front pier column;
the tower 17 comprises a left vertical supporting frame 17-1 and a right vertical supporting frame 17-1 which are symmetrically arranged, the two vertical supporting frames 17-1 are both supported on the rear permanent support, and the two vertical supporting frames 17-1 are symmetrically arranged on the left side and the right side of the horizontal moving channel.
Meanwhile, each tower 17 further comprises a plurality of transverse connecting beams 17-2 which are arranged from top to bottom, and two vertical supports 17-1 in each tower 17 are connected into a whole through the plurality of transverse connecting beams 17-2.
In this embodiment, the vertical supporting frame 17-1 is a supporting column formed by assembling a plurality of straight rods, and the supporting column is a cubic column.
The transverse connecting beam 17-2 is a horizontal connecting beam formed by assembling a plurality of straight rods.
In actual construction, a tower foundation for supporting the tower 17 does not need to be specially constructed, and only the tower 17 needs to be directly supported on the rear permanent support, so that the support is firm, and labor and time are saved. Meanwhile, as the tower 17 and the front pier column are both supported on the rear permanent support, after the construction of the rear permanent support is completed, the construction can be carried out on the tower 17 and the front pier column respectively, the construction efficiency can be effectively improved, and the cable crane is more convenient to hoist the arch frame assembly section 1-1 which is moved to the upper part of the front pier column. The area above the front pier column is the hoisting area of the cable crane, and the hoisting area is positioned on the front side of the tower 17.
In actual construction, the two towers 17, the arch rib 2 and the longitudinal supporting beam 3-1 are all positioned on the same vertical surface, the two towers 17 are respectively a front tower positioned at the front side of the arch rib 2 and a rear tower positioned at the rear side of the arch rib 2, and the tower 17 supported on the rear permanent support is the rear tower. . Wherein the trolley is also called a sports car or a crane sports car.
In this embodiment, each supporting pier 7 includes two vertical piers 7-1 symmetrically arranged left and right and a capping beam 7-2 horizontally supported on the two vertical piers 7-1, the capping beams 7-2 are horizontally arranged and are arranged along the transverse bridge direction, and the longitudinal supporting beams 3-1 are supported on a plurality of capping beams 7-2 in the moving channel supporting structure.
In actual construction, the capping beam 7-2 is a reinforced concrete beam, and the vertical pier column 7-1 is a reinforced concrete column.
In this embodiment, the horizontal support plate is a flat steel plate, and the horizontal support plate is connected with each bent cap 7-2 in the moving channel support structure through a plurality of vertical connecting bolts 16. Therefore, the practical disassembly and assembly are simple and convenient, and the stable supporting requirement can be met.
In order to ensure the stability of the support, a lower support steel plate 18 is arranged between the horizontal support plate and each cover beam 7-2 in the support structure of the moving channel in a cushioning manner, and each lower support steel plate 18 is fixed with the horizontal support plate through a vertical connecting bolt 16.
In this embodiment, a leveling layer 19 is disposed between the lower support steel plate 18 and the capping beam 7-2 supported by the lower support steel plate, and the leveling layer 19 is a mortar leveling layer or a concrete leveling layer.
In this embodiment, the horizontal moving rail 11 is a channel steel with an upward notch. The horizontal movement mechanism 10 is mounted in the channel steel.
The horizontal movement rail 11 is simple and convenient to actually install, convenient to use and operate and good in use effect, and the channel steel can stably guide the horizontal movement mechanism 10, so that the simple and convenient and quick movement process is ensured.
In this embodiment, the horizontal movement mechanism 10 is a horizontal movement vehicle, and the horizontal movement vehicle includes a frame 10-1, an upper support plate 10-3 mounted on the frame 10-1, and two sets of travelling wheels 10-2 symmetrically mounted at bottoms of left and right sides of the frame 10-1, where each set of travelling wheels 10-2 includes a plurality of travelling wheels 10-2 arranged from front to back along a longitudinal bridge direction; the moved arch-assembling segments 1-1 are supported on the upper support plate 10-3.
Each track supporting beam 12 is formed by splicing a plurality of I-beams, the I-beams are horizontally distributed and distributed along the longitudinal bridge direction, and the I-beams are distributed from left to right along the transverse bridge direction. In order to ensure the stability of the support, each of the rail support beam 12 and the longitudinal support beam 3-1 is provided with a support steel plate 13, and the support steel plate 13 is a flat steel plate horizontally arranged and is arranged along the longitudinal bridge direction.
In this embodiment, each of the rail support beams 12 is welded and fixed to one of the support-pad steel plates 13. Each of the horizontal moving rails 11 is welded and fixed to one of the rail support beams 12. The actual construction is simple and convenient, and the connection is firm.
When in actual use, the side beam section supporting structure for supporting the side beam section 4 is utilized to move the arch frame assembly section 1-1, the arch frame assembly section 1-1 can be directly and rapidly moved to the hoisting area of the cable crane, the occupied space is small, the construction is simple and rapid, a special construction moving channel is not needed, labor and time are saved, the cost can be greatly saved, and meanwhile, the use effect is good, and the construction situation and the site construction condition are not limited. As shown in fig. 5 and 6, the working rope 17-8 is provided with a front trolley and a rear trolley, and the two trolleys are respectively a front trolley 21 and a rear trolley 22 positioned at the rear side of the front trolley 21.
In this embodiment, the number of the working cables 17-8 is two, both the two working cables 17-8 are arranged along the longitudinal bridge direction and are symmetrically arranged above the left and right sides of the pre-construction arch rib; each working cable 17-8 is provided with a front lifting trolley and a rear lifting trolley, and the two lifting trolleys are positioned between the two towers 17; the hoisting device is used for hoisting the paired arch frame assembly segments 1-1 of the four hoisting trolley groups in the cable crane;
The two working cables 17-8 are respectively a left working cable and a right working cable positioned on the right side of the left working cable, and the two vertical supporting frames 17-1 in each tower 17 are respectively a left supporting frame and a right supporting frame positioned on the right side of the left supporting frame; the left working cable is supported on the left support frames of the two towers 17, and the right working cable is supported on the right support frames of the two towers 17.
The lifting trolleys are sports cars, and the two lifting trolleys are respectively a front sports car 21 and a rear sports car 22 positioned at the rear side of the front sports car 21. The cable saddle 17-6 is provided with a cable pulley to which the cable 17-8 is attached.
In this embodiment, a vertical baffle 38 is installed on the inner side wall of each vertical support 30-2, and the vertical baffle 38 is located above the horizontal slideway; the vertical baffle plates 38 are distributed along the transverse bridge direction, the vertical baffle plates 38 are rectangular flat steel plates and are positioned above the horizontal support 30-1, and the outer side walls of the horizontal support seats are clung to the vertical baffle plates 38;
the two vertical baffles 38 on the front support are arranged on the same horizontal plane and the same vertical plane, and the two vertical baffles 38 on the rear support are arranged on the same horizontal plane and the same vertical plane.
As shown in fig. 15, each of the vertical baffles 38 is located directly above the vertical right-angle side below it, and the bottom of each of the vertical baffles 38 is in close contact with the vertical right-angle side below it and both form a side guide plate.
In the actual use process, in the concrete pouring process of the constructed arch rib, the steel arch support supporting the steel arch (namely the arch support frame 100) bears the dead weight of the whole steel arch, the weight of an arch rib forming template, construction load and the like, each temporary arch seat is uniformly distributed on the permanent support 6 of the constructed arch rib, the permanent support 6 is a reinforced concrete support, the support foundation of the reinforced concrete support is a reinforced concrete support which is horizontally distributed, and the temporary arch seat is fixed on the support foundation and is fixedly connected with the permanent support 6 into a whole, so that the bearing effect and the stress performance of the temporary arch seat can be effectively ensured. And when the support foundation is poured, the temporary arch abutment is synchronously poured, the temporary arch abutment and the support foundation are integrally poured, and the temporary arch abutment is a support formed by C40 concrete pouring.
Each temporary arch abutment comprises a horizontal abutment 30-1 (i.e. a base) and a vertical abutment 30-2 (a back abutment), the arch centering hinge abutment 20 on the horizontal abutment 30-1 (i.e. the base) is a hinge pivot of the steel arch centering, huge horizontal force and vertical force born by the arch centering hinge abutment 20 are transmitted to the back abutment, and vertical force is transmitted to the base, so that the temporary arch abutment is reasonable in structural design and good in stress effect. The arch frame hinging seat 20 is hinged with the steel arch frame, and considering the transverse movement of the steel arch frame, a transverse movement distribution beam is arranged on the horizontal support 30-1, the arch frame hinging seat 20 is firmly fixed at the top of the transverse movement distribution beam, and the transverse movement distribution beam, the arch frame hinging seat 20 and the steel arch frame integrally move transversely during the transverse movement.
In this embodiment, the front support is supported on the front foundation 39, the rear support is supported on the rear foundation 40, and the front foundation 39 and the rear foundation 40 are reinforced concrete platforms horizontally arranged. The two lateral movement driving devices are respectively arranged on the front side foundation 39 and the rear side foundation 40, and the two reaction frames 37 are respectively arranged on the front side foundation 39 and the rear side foundation 40. The front foundation 39 and the rear foundation are both the abutment foundations.
In this embodiment, the temporary abutment is 1m in longitudinal width and 22m in lateral width.
During actual construction, the size of the temporary arch abutment can be correspondingly adjusted according to specific requirements.
In this embodiment, the vertical baffle 38 is a steel plate with a thickness of 1 cm.
In actual use, the vertical baffle 38 may be used as a limiting plate for limiting the transverse installation seat, or may be used as a guide plate in the transverse bridge translation process of the transverse installation seat, so as to further ensure the stability of the transverse moving process of the steel arch. Meanwhile, the vertical baffle 38 can effectively reduce the friction between the transverse mounting seat and the vertical support 30-2, so that the transverse moving process of the transverse mounting seat is simpler, more convenient and faster. The vertical baffle 38 is smoothly connected with the horizontal slideway below the vertical baffle, so that friction force in the sliding process can be effectively reduced.
To ensure that the steel truss (i.e., arch support 100) translates smoothly in the cross-bridge direction, the clear distance between two of the horizontal slides 33 is less than the length of the transverse mount. The length of the transverse installation seat is the same as the transverse bridge width of the steel truss, and the length of the transverse distribution beam is the same as the length of the transverse installation seat, so that the transverse installation seat can be stably and firmly supported on the transverse distribution beam, and the two transverse distribution beams can be ensured to stably and reliably support the steel truss.
In this embodiment, the vertical jack 32 and the pushing jack 41 are hydraulic jacks, and the hydraulic jacks use plungers or hydraulic cylinders as rigid lifting members (i.e., lifting members).
In the actual use process, when the steel arch (arch support frame 100) is adopted to construct the constructed arch rib (namely the arch rib 2), the steel arch is in a supporting state; when the steel arch is transversely moved by the translation device, the steel arch is in a transversely moving state. When the steel arch is in a supporting state, the steel arch is stably and upwards lifted by the steel arch lifting device positioned right below the steel arch until the steel arch is lifted in place, and at the moment, the upper ends of the rigid lifting pieces of all the vertical jacks 32 in the steel arch lifting device for lifting the steel arch extend above the horizontal support 30-1. When the steel arch is in a transverse movement state, all the vertical jacks 32 in the steel arch jacking device for jacking the steel arch are retracted, and the upper ends of the rigid jacking pieces of all the vertical jacks 32 in the steel arch jacking device are positioned below the upper surface of the horizontal support 30-1.
In this embodiment, as shown in fig. 15, the horizontal slideway is a right angle steel fixed on the inner side wall of the vertical support 30-2.
In practice, the translational chute 33 may be another type of chute, such as a channel with an upward slot.
For the convenience and firmness of fixing, the embedded steel plates 42 for fixing the horizontal slide ways are arranged in the vertical support 30-2, the embedded steel plates 42 are vertically distributed along the transverse bridge direction, the outer side walls of the embedded steel plates 42 are flush with the inner side walls of the vertical support 30-2, and the horizontal slide ways are welded and fixed on the embedded steel plates 42. And, one right-angle side of the translation slide 33 is a vertical right-angle side welded and fixed with the embedded steel plate 42 into a whole, and the other right-angle side of the translation slide 33 is a horizontal right-angle side arranged horizontally. When the steel arch is transversely moved, the transverse installation seat is horizontally supported on the horizontal right-angle side, so that the horizontal right-angle side is a sliding channel of the transverse installation seat.
In order to further enhance the stability of the horizontal right-angle side, a plurality of triangular stiffening plates 23 are arranged at the bottom of the horizontal right-angle side along the transverse bridge from left to right, the triangular stiffening plates 23 are vertically arranged and welded and fixed at the bottom of the horizontal right-angle side, and the triangular stiffening plates 23 are welded and fixed on the embedded steel plates 42.
As shown in fig. 1, 22 and 25, each of the traverse driving devices further includes a reaction frame 37 for providing a reaction force to the pushing jack 41, each reaction frame 37 and one pushing jack 41 are disposed on the same vertical plane, and each pushing jack 41 is disposed between one reaction frame 37 and the steel arch. Thus, the rigid jacking members of each of the jacking jacks 41 bear against one of the transverse distribution beams.
In the actual construction process, the steel arch is lowered after the construction of the constructed arch rib is completed and before the steel arch is transversely moved. In this embodiment, as shown in fig. 23, 24 and 25, the arch support and traversing device further includes two beam dropping devices symmetrically arranged on the left and right, each beam dropping device is uniformly arranged on one steel arch support; each beam falling device comprises a front beam falling mechanism and a rear beam falling mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one beam falling mechanism; each beam falling mechanism comprises H temporary supports which are arranged on the same vertical surface from left to right along the transverse bridge direction and used for supporting the steel arch in the descending process, the temporary supports are vertically arranged, the structures and the sizes of the H temporary supports are the same, and the H temporary supports are uniformly arranged on the same horizontal plane; wherein H is a positive integer and H is less than or equal to M; each temporary support is uniformly distributed in one vertical groove 31;
All temporary supports on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the front support form a front girder falling support; all temporary supports on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the rear support form a rear girder falling support; the front side drop beam support is positioned right below one transverse distribution beam, and the rear side drop beam support is positioned right below the other transverse distribution beam; all temporary supports on each steel arch support form a steel arch girder falling support for synchronously supporting the steel arch.
When the steel arch is lowered, all temporary supports arranged on the steel arch supports right below the steel arch synchronously lower the steel arch. And, before the steel arch is lowered, the temporary support is arranged on the steel arch support right below the steel arch. The temporary support is a sand cylinder 34 or a sand box.
In this embodiment, the temporary support is a sand cylinder 34, and the sand cylinder 34 is an unloading support.
In this embodiment, n=5.
When in actual use, the value of N can be correspondingly adjusted according to specific needs. Thus, each vertical groove 31 in the temporary arch support is uniformly provided with a vertical jack 32.
In this embodiment, h=5. Thus, each of the vertical grooves 31 in the temporary abutment is uniformly provided with one of the temporary abutments.
When in actual use, the value of H can be correspondingly adjusted according to specific needs.
In this embodiment, each lateral movement driving device further includes a traction mechanism 35 for driving the lateral distribution beams to move forward horizontally, each traction mechanism 35 is disposed on the same vertical plane with one lateral distribution beam, and the traction mechanism 35 is connected with the lateral distribution beams on the same vertical plane through a traction rope 36;
the pushing jack 41 and the traction mechanism 35 in each transverse movement driving device are respectively arranged on two sides of the steel arch. In actual use, the pushing jack 41 cooperates with the traction mechanism 35 to translate the steel arch.
In this embodiment, the traction mechanism 35 is a winch.
In practice, other types of traction devices may be used for the traction mechanism 35.
In this embodiment, the constructed arch ribs are arch ribs of an upper-bearing box-shaped arch bridge, the number of the constructed arch ribs is two, two arch ribs are symmetrically distributed in a left-right mode, and each steel arch support is located under one arch rib.
When the transverse width of the arched support frame 100 is smaller than the clear distance between the two vertical support frames 17-1 in the rear tower, the arched support frame 100 is one spliced steel arch frame 1; otherwise, when the transverse width of the arch support 100 is not smaller than the clear distance between the two vertical supports 17-1 in the rear tower, the arch support 100 needs to be divided into a plurality of arches from left to right, each assembled steel arch 1 is one arch in the arch support 100, each arch is formed by splicing a plurality of arch assembling sections 1-1 distributed from front to back along the longitudinal bridge direction, and at this time, each arch in the arch support 100 is an assembled steel arch 1.
As shown in fig. 14, 15 and 16, in this embodiment, the front and rear arches of the arch support 100 are respectively supported on an arch hinge seat 20, the arch hinge seat 20 is a transverse mounting seat for mounting the arches of the arch support 100, a transverse distribution beam is mounted at the bottom of the arch hinge seat 20, and the transverse distribution beam is an arch seat beam 23 mounted at the bottom of the arch hinge seat 20; the arch support 100 is disposed vertically and along a longitudinal bridge. The arch bridge 23 is supported on the lifting device or the girder dropping device. When the arch support 100 is translated, the arch bridge 23 is supported on the translation slide 33.
In this embodiment, each of the abutment beams 23 is supported on a temporary abutment, which is an L-shaped abutment 30 arranged inside the permanent abutment 6. And, the L-shaped support 30 is provided with a vertical support (i.e., the lifting device or the girder dropping device) for supporting the arch-seat girder 23.
As shown in fig. 11 and 21, the arch support 100 includes two arch leg segments 1-100 symmetrically arranged in front and back, and a bearing steel arch connected between the two arch leg segments 1-100, where the bearing steel arch and the two arch leg segments 1-100 are arranged along a longitudinal bridge direction; the bearing steel arch is formed by splicing a plurality of steel arch segments 1-2, and the steel arch segments 1-2 are arranged from front to back along a longitudinal bridge; the lower parts of the front end and the rear end of the bearing steel arch frame are connected with the lower parts of the two arch leg sections 1-100 and the lower parts of the front and rear adjacent two steel arch frame sections 1-2 in a hinged mode, and the upper parts of the front end and the rear end of the bearing steel arch frame are connected with the upper parts of the two arch leg sections 1-100 and the upper parts of the front and rear adjacent two steel arch frame sections 1-2 through adjustable connecting pieces; the two arch leg sections 1-100 and the plurality of steel arch frame sections 1-2 are steel trusses assembled by a plurality of straight rods;
The bottoms of the two arch leg sections 1-100 are respectively provided with a transverse steel pipe 1-11 horizontally supported on an arch frame hinging seat 20, the transverse steel pipes 1-11 are horizontally arranged and are arranged along a transverse bridge direction, and the transverse steel pipes 1-11 are round steel pipes; each of the transverse steel pipes 1-11 is supported on one of the arch hinge bases 20, and each of the transverse steel pipes 1-11 is connected with the arch hinge base 20 supported by the transverse steel pipe in a hinged manner. The articulation between the steel arch and the arch abutment 20 is thus easily achieved by means of the transverse steel tubes 1-11.
In this embodiment, the straight rod is a straight steel pipe.
As shown in fig. 17 and 18, the arch hinge base 20 includes a horizontal support base supported on the arch bridge 23 and a support steel plate 20-1 supported on the horizontal support base, where the horizontal support base and the support steel plate 20-1 are both horizontally arranged and both are arranged along the transverse bridge direction; the cross section of each supporting steel plate 20-1 is arc-shaped, each transverse steel pipe 1-11 is supported on one supporting steel plate 20-1, each transverse steel pipe 1-11 and the supporting steel plate 20-1 supported by the transverse steel pipe are coaxially arranged, and the supporting steel plate 20-1 is positioned below the outer side of the supported transverse steel pipe 1-11.
In this embodiment, each of the transverse distribution beams is supported on a temporary abutment, which is an L-shaped abutment 30 arranged inside the permanent abutment 6.
In this embodiment, as shown in fig. 21, each of the arch leg segments 1-100 is formed by assembling M arch leg steel trusses, where the structures of the M arch leg steel trusses are the same and the M arch leg steel trusses are arranged from left to right along a transverse bridge;
as shown in fig. 11 and 21, each steel arch segment 1-2 is formed by assembling M arched steel trusses, wherein the M arched steel trusses have the same structure and are distributed from left to right along a transverse bridge;
each arch steel truss in the steel arch segments 1-2 and one arch steel truss in the arch leg segments 1-100 are arranged on the same vertical surface;
two arch foot steel trusses and all arch steel trusses positioned on the same vertical surface of the arch support frame 100 form an assembled steel arch, the arch support frame 100 comprises M assembled steel arches which are distributed from left to right along a transverse bridge, and the M assembled steel arches have the same structure and size and are distributed along a longitudinal bridge;
each vertical groove 31 in each temporary abutment is located directly below one of the assembled steel arches.
In actual construction, the number of the vertical grooves 31 in each temporary abutment is determined according to the number of the assembled steel arches in the arch support 100.
In this embodiment, the front and rear arch leg segments 1-100 and the plurality of steel arch segments 1-2 in the arch support 100 are uniformly distributed on the same vertical plane.
For easy connection and convenient disassembly, the lower parts of the front end and the rear end of the bearing steel arch are connected with the lower parts of the two arch foot sections 1-100 and the lower parts of the front and rear adjacent two steel arch frame sections 1-2 through horizontal hinge shafts 29, and the horizontal hinge shafts 29 are distributed along the transverse bridge direction.
As shown in fig. 11 and 21, the upper portions of the two arch segments 1 to 100 and the upper portions of the front and rear sides of each of the steel arch segments 1 to 2 are provided with bolt mounts 25 for mounting the adjusting bolts 24. In this embodiment, the distance between the upper part of the bearing steel arch and the upper parts of the two arch leg segments 1-100 and the distance between the upper parts of the two adjacent steel arch segments 1-2 are adjusted by adjusting bolts 24.
For firm fixation and stable support, the arch support beam 23 is a steel box beam welded and fixed at the bottom of the horizontal support base.
In this embodiment, the steel box girder is formed by splicing two I-beams symmetrically arranged in front and back directions, wherein the two I-beams are horizontally arranged and uniformly arranged on the same horizontal plane, and the two I-beams are arranged along the transverse bridge direction.
In order to further improve the supporting strength of the steel box girder, two I-steel beams are fastened and connected through a plurality of transverse connecting plates, and the transverse connecting plates are fastened and connected through a plurality of pull rods horizontally distributed along the transverse bridge.
In the process of transversely moving the steel arch, the transverse distribution beam is supported on the horizontal support 30-1, so that the steel arch is always in a stable state in the transversely moving process, and the vertical acting force born by the steel arch directly acts on the horizontal support 30-1, so that the vertical acting force born by the steel arch is prevented from acting on the horizontal slideway and causing the horizontal slideway to be damaged. Meanwhile, in the process of transversely moving the steel arch, the outer side of the transverse installation seat is tightly attached to the vertical baffle 38, so that the horizontal force born by the steel arch can be ensured to act on the horizontal slideway and cause the horizontal slideway to be damaged. And moreover, the steel arch can be ensured to be convenient and fast to transversely move.
In order to ensure that the transverse distribution beam can simply, conveniently, rapidly and stably move on the horizontal support 30-1, the bottoms of the front end and the rear end of the transverse distribution beam are cut to form a ship shape, and sliding steel plates are welded at the bottoms of the front end and the rear end of the transverse distribution beam, so that the damage of the vertical grooves 31 caused by the concentrated end stress in the transverse distribution beam transverse moving process is prevented.
As shown in fig. 18, the horizontal support base includes an L-shaped support base supported below the outer side of the support steel plate 20-1, the cross section of the L-shaped support base is L-shaped and is distributed along the transverse bridge direction, the L-shaped support base is composed of a horizontal bottom plate 20-2 horizontally supported on an arch support beam 23 and a vertical support plate 20-3 fixed above the outer side of the horizontal bottom plate 20-2, the horizontal bottom plate 20-2 is connected with the support steel plate 20-1 through a plurality of vertical steel plates 20-4 distributed from outside to inside, the vertical support plate 20-3 is connected with the support steel plate 20-1 through a plurality of transverse steel plates 20-5 distributed from bottom to top, and the transverse steel plates 20-5 are horizontally distributed; the horizontal bottom plate 20-2, the vertical supporting plate 20-3, the vertical steel plate 20-4 and the horizontal steel plate 20-5 are all flat steel plates and are distributed along the transverse bridge direction, the vertical steel plate 20-4 is fixedly connected with the horizontal bottom plate 20-2 and the supporting steel plate 20-1 in a welding mode, and the horizontal steel plate 20-5 is fixedly connected with the vertical supporting plate 20-3 and the supporting steel plate 20-1 in a welding mode.
In this embodiment, the number of the vertical steel plates 20-4 and the number of the horizontal steel plates 20-5 in the horizontal supporting seat are two. During actual processing, the number of the vertical steel plates 20-4 and the transverse steel plates 20-5 in the horizontal supporting seat and the arrangement positions of the vertical steel plates 20-4 and the transverse steel plates 20-5 can be respectively and correspondingly adjusted according to specific requirements.
Meanwhile, the horizontal supporting seat further comprises an inclined steel plate 20-6, the inclined steel plate 20-6 gradually inclines outwards from top to bottom and is a flat steel plate distributed along the transverse bridge direction, the upper portion of the inclined steel plate 20-6 is fixedly welded on the supporting steel plate 20-1, and the bottom of the inclined steel plate is fixedly welded at the joint between the horizontal bottom plate 20-2 and the vertical supporting plate 20-3.
As shown in fig. 19, to ensure that the arch support 100 can be stably and stably supported on the arch hinge base 20, the arch hinge base 20 further includes a plurality of steel pipe limiting mechanisms for limiting the transverse steel pipes 1-11, wherein the plurality of steel pipe limiting mechanisms have the same structure and are arranged from left to right along the transverse bridge, and the plurality of steel pipe limiting mechanisms are arranged vertically;
the steel pipe limiting mechanism comprises an arc limiting pressing strip 20-7 which is arranged above the inner side of a transverse steel pipe 1-11, the arc limiting pressing strip 20-7 is vertically arranged, the upper end and the lower end of the arc limiting pressing strip are both fixed on the horizontal supporting seat, a limiting steel strip 20-8 is arranged between the arc limiting pressing strip 20-7 and the transverse steel pipe 1-11 in a cushioning mode, and the cross section of the limiting steel strip 20-8 is arc-shaped and is fixed under the arc limiting pressing strip 20-7.
In this embodiment, the arc-shaped limiting bead 20-7 is a steel bar bead formed by bending a steel bar, and the limiting steel plate strip 20-8 is formed by bending a rectangular flat steel plate and is welded and fixed on the arc-shaped limiting bead 20-7.
For the convenience of fixing, the upper section of the arc limiting depression bar 20-7 is an upper connecting section, the lower section of the arc limiting depression bar is a lower connecting section, a lower lug plate 26 for fixing the lower connecting section is fixedly welded on the horizontal bottom plate 20-2, an upper lug plate 27 for fixing the upper connecting section is fixedly welded on the inner side of the upper part of the vertical supporting plate 20-3, and the lower lug plate 26 and the upper lug plate 27 are straight steel plates distributed vertically. When the steel pipe limiting mechanism is actually fixed, the upper connecting section and the upper lug plate 27 and the lower connecting section and the lower lug plate 26 are fixedly connected through the horizontal connecting bolts 28, so that the steel pipe limiting mechanism is simple and convenient to connect and convenient to disassemble and assemble, and the steel pipe limiting mechanism can effectively limit the transverse steel pipes 1-11, prevent the transverse steel pipes 1-11 from being separated from the horizontal supporting seat, and ensure the supporting stability of the transverse steel pipes 1-11; meanwhile, the steel pipe limiting mechanism does not limit the transverse steel pipe 1-11 to rotate on the supporting steel plate 20-1.
As shown in fig. 21, each arch foot steel truss is a triangular steel truss, each arch foot steel truss comprises two triangular plane trusses which are symmetrically distributed left and right, the two triangular plane trusses are vertically distributed and are distributed along a longitudinal bridge, and the two triangular plane trusses are connected through a plurality of connecting rods; each triangular plane truss is formed by connecting a lower connecting rod 1-12, an upper connecting rod 1-13 positioned right above the lower connecting rod 1-12 and a middle connecting rod 1-14 connected between the lower connecting rod 1-12 and the upper connecting rod 1-13, the lower ends of the lower connecting rod 1-12 and the upper connecting rod 1-13 are both fixed on a transverse steel pipe 1-11, and the upper ends of the lower connecting rod 1-12 and the upper end of the upper connecting rod 1-13 are connected through the middle connecting rod 1-14.
In this embodiment, the lower connecting rods 1-12, the upper connecting rods 1-13 and the middle connecting rods 1-14 are straight steel pipes, the lower ends of the lower connecting rods 1-12 and the lower ends of the upper connecting rods 1-13 are welded and fixed on the transverse steel pipes 1-11, and the middle connecting rods 1-14 are fixedly connected with the lower connecting rods 1-12 and the upper connecting rods 1-13 in a welding manner. The connecting rods are flat steel pipes and are fixedly connected with the triangular plane trusses in a welding mode.
As shown in fig. 11 and 20, two adjacent arch steel trusses in each arch segment 1-100 and two adjacent arch steel trusses in each steel arch segment 1-2 are fastened and connected into a whole through a transverse connecting frame;
each arch steel truss comprises two arch plane trusses which are symmetrically distributed left and right, the two arch plane trusses are vertically distributed and are distributed along the longitudinal bridge direction, and the two arch plane trusses are connected through a plurality of connecting rod pieces; each arched plane truss is formed by connecting a lower chord member 1-21, an upper chord member 1-22 positioned right above the lower chord member 1-21 and a plurality of web members 1-23 connected between the lower chord member 1-21 and the upper chord member 1-22.
In this embodiment, m=5.
In actual processing, the value of M can be correspondingly adjusted according to specific requirements.
In this embodiment, the lower chord member 1-21, the upper chord member 1-22 and the web member 1-23 are all flat steel plates, and the web member 1-23 is fixedly connected with the lower chord member 1-21 and the upper chord member 1-22 in a welding manner. The connecting rod piece is a straight steel pipe and is fixedly connected with the arched plane truss in a welding mode.
In this embodiment, each of the lower connecting rods 1-12 is connected with the lower chord member 1-21 adjacent to the lower connecting rod and the lower chord member 1-21 adjacent to the lower connecting rod in the front-back direction through a horizontal hinge shaft 29, each of the upper connecting rods 1-13 is connected with the upper chord member 1-22 adjacent to the upper connecting rod and the upper chord member 1-22 adjacent to the upper connecting rod in the front-back direction through the adjustable connecting piece, and the adjustable connecting piece is arranged along the longitudinal bridge direction.
In actual use, the front end and the rear end of the arch support frame 100 are respectively supported on the arch frame hinging seat 20, the front end and the rear end of the arch support frame 100 are respectively provided with a transverse steel pipe 1-11, and the transverse steel pipes 1-11 are connected with the supported arch frame hinging seat 20 in a hinging manner, so that the deformation requirement of the arch support frame 100 can be effectively met. And, each of the arch hinge bases 20 is stably supported by one arch base beam 23. In the actual construction process, the arch support frame 100 can be simply and conveniently pushed to move along the transverse bridge by synchronously pushing the two arch abutment beams 23 along the transverse bridge, so that the arch support frame 100 can be moved out from the position right below the constructed arch rib for subsequent use or dismantling.
In this embodiment, as shown in fig. 22, the middle arch includes 3 steel arches arranged from left to right along the transverse bridge, and the left arch and the right arch each include one steel arch.
The method for assembling and traversing the steel arch for the construction of the over-supported arch bridge is shown in fig. 13, wherein each assembled steel arch 1 in the assembled steel arch comprises a vault splicing section 1-01 and two side splicing frames which are symmetrically arranged front and back, the vault splicing section 1-01 is connected between the two side splicing frames, each side splicing frame is formed by splicing a plurality of arch splicing sections 1-1 which are arranged from bottom to top, and each vault splicing section is one arch splicing section 1-1; the assembled steel arch is an arch support 100;
when assembling and traversing the assembled steel arch, the method comprises the following steps:
step one, constructing a bridge lower support structure and a steel arch support, and installing a translation slideway and a lifting device: respectively constructing two permanent supports 6 and two side beam section supporting structures below each main beam in the constructed upper arch bridge to obtain a front side beam section supporting structure, a rear side beam section supporting structure, a front permanent support and a rear permanent support which are formed by construction;
simultaneously, constructing two steel arch supports in the arch support and traversing device to obtain a front support and a rear support which are formed by construction;
After the construction of the front support and the rear support is completed, respectively installing a translation slideway 33 on the front support and the rear support which are formed by construction; simultaneously, installing one lifting device on each of the two steel arch supports formed by construction;
step two, construction of a cable crane and an arch frame sectional transferring device: constructing the horizontal moving channel on the rear side beam section supporting structure right behind the pre-constructed arch rib, and installing the assembling section moving device on the horizontal moving channel to obtain the arch frame sectional transferring device with the construction completed; simultaneously, constructing the cable crane, and supporting the rear tower in the cable crane on the rear permanent support at the rear side of the pre-construction arch rib;
step three, assembling the steel arch frame: assembling the arch support frame 100, positioning the assembled arch support frame 100 under the pre-construction arch rib, supporting the assembled arch support frame 100 on one lifting device under the pre-construction arch rib, and respectively supporting the front end and the rear end of the arch support frame 100 on one lifting mechanism;
When the arch support frames 100 are assembled, all the assembled steel arches 1 in the arch support frames 100 are assembled from first to second, and the assembling methods of all the assembled steel arches 1 in the arch support frames 100 are the same;
when assembling the arch support 100, the method comprises the following steps:
step 301, splicing the side splicing frames: symmetrically splicing the two side splicing frames of one splicing type steel arch 1 in the arch support 100;
when any side splicing frame is spliced, a plurality of arch frame splicing sections 1-1 forming the side splicing frame are spliced from bottom to top, and the process is as follows:
step 3011, assembling a first arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the currently assembled arch frame assembling section 1-1 to the position above the front end of the horizontal moving channel, and then the hoisting trolley of the cable crane is adopted to hoist and lower the arch frame assembling section 1-1 in place, so that the assembling process of the currently assembled arch frame assembling section 1-1 is completed;
in the step, the currently spliced arch frame splicing section 1-1 is the lowest one of the arch frame splicing sections 1-1 in the side splicing frames;
Step 3012, assembling the last arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the last spliced arch frame splicing section 1-1 to the position above the front end of the horizontal moving channel, then the trolley of the cable crane is adopted to hoist and lower the arch frame splicing section 1-1 in place, and meanwhile, the arch frame splicing section 1-1 which is put in place is connected with the arch frame splicing section 1-1 which is positioned below the arch frame splicing section and is spliced, so that the splicing process of the current spliced arch frame splicing section 1-1 is completed;
step 3013, repeating step 3012 one or more times, completing the assembling process of all arch frame assembling segments 1-1 in the side splicing frames, and obtaining the assembled side splicing frames;
step 302, splicing vault splicing sections: after the two side splicing frames of the spliced steel arch 1 are spliced, adopting the arch segmentation transfer device to forward translate the arch splicing section 1-01 to the position above the front end of the horizontal moving channel, then adopting the crane trolley of the cable crane to hoist and lower the arch splicing section 1-01 in place, and simultaneously connecting the arch splicing section 1-01 which is lowered in place with the spliced two side splicing frames to finish the folding process of one spliced steel arch 1 to obtain the spliced steel arch 1;
Step 303, judging the assembly completion of the arched support frame: judging whether the arched support frames 100 are assembled or not, when the arched support frames 100 are assembled, completing the assembling process of the arched support frames 100, and entering a step four; otherwise, go to step 304;
step 304, splicing the next spliced steel arch frame: assembling the next assembled steel arch 1 in the arch support 100 according to the method described in the steps 301 to 302, and connecting each arch assembly section 1-1 in the assembled steel arch 1 with the assembled steel arch 1 assembled at the moment;
step 305, assembling completion judgment of the arch support frame: judging whether the arched support frames 100 are assembled or not, when the arched support frames 100 are assembled, completing the assembling process of the arched support frames 100, and entering a step four; otherwise, returning to step 304;
step four, jacking an arch support frame: the arch support frame 100 is vertically lifted upwards by adopting the lifting device supported below the arch support frame 100 until the arch support frame 100 is lifted to the construction position of the arch rib firstly constructed;
step five, the arch support frame is lowered: vertically lowering the arch-shaped support 100 in the fourth step by adopting the lifting device or the vertical moving device supported below the arch-shaped support 100 until the front end and the rear end of the arch-shaped support 100 are respectively supported on one translation slideway 33;
Step six, mounting a transverse movement driving device: the front transverse moving driving device and the rear transverse moving driving device are respectively installed to obtain the translation device with the installation completed, each pushing jack 41 in the translation device and one transverse distribution beam in the arched support frame 100 are arranged on the same vertical surface, and the pushing jacks 41 prop against the transverse distribution beams on the same vertical surface;
seventh, transversely moving the arched support frame: synchronously driving the arch support frame 100 to translate towards one side of the rear construction arch rib along the transverse bridge by utilizing the front and rear transverse movement driving devices in the seventh step until the arch support frame 100 is moved to the position right below the rear construction arch rib, simultaneously supporting the arch support frame 100 on one lifting device right below the rear construction arch rib, and respectively supporting the front and rear ends of the arch support frame 100 on one lifting mechanism;
step eight, jacking an arch support frame: the arch support 100 is vertically lifted up by using the lifting device supported below the arch support 100 until the arch support 100 is lifted up to the construction position of the post-construction arch rib.
In step 301, symmetrically assembling the two side splicing frames of the assembled steel arch 1 refers to staggered assembling of arch assembling segments 1-1 in the two side splicing frames.
In the embodiment, the two side splicing frames are respectively a front splicing frame positioned at the front side of the vault splicing section 1-01 and a rear splicing frame positioned at the rear side of the vault splicing section 1-01;
the two bridge decks 8 are respectively a front bridge deck supported below the front end of the main beam and a rear bridge deck supported below the rear end of the main beam, a front anchor ingot 15-1 is arranged right in front of the front bridge deck, and a rear anchor ingot 15-2 is arranged right behind the rear bridge deck;
the front end of each buckling rope 17-10 in the rear tower is fixed on an arch frame assembling section 1-1 which is hoisted in place in the rear side assembling frame, and the rear end of each buckling rope 17-10 in the rear tower is fixed on a rear anchor 15-2;
the rear end of each buckling rope 17-10 in the front tower is fixed on one arch frame assembly section 1-1 in the front side assembly frame, and the front end of each buckling rope 17-10 in the front tower is fixed on a front anchor 15-1;
after the arch frame assembling section 1-1 put down in place is connected with the arch frame assembling section 1-1 positioned below the arch frame assembling section and assembled in step 3012, the arch frame assembling section 1-1 assembled in the step is also required to be temporarily fixed through one buckling rope 17-10. Therefore, in the assembling process, the stability of the assembled arch frame assembling section 1-1 can be ensured through the two groups of buckling ropes 17-10.
From the above, it can be seen that the suspended arch frame assembling segment 1-1 in place is temporarily fixed by adopting a suspension manner of cable-stayed buckling (namely buckling cable 17-10), and before the arch frame assembling segment is assembled in step 302, the line shapes of the two side frame assembling frames can be respectively adjusted through the two groups of buckling cables 17-10, so that the line shape of the assembled steel arch frame 1 after being folded is further ensured.
And (2) after the splicing of the arch roof splicing sections is completed in the step (302), the two groups of buckling ropes 17-10 are removed step by step in batches.
In this embodiment, when the first arch frame assembling segment is assembled in step 3011 and when the last arch frame assembling segment is assembled in step 3012, the arch frame segment transferring device is used to translate the currently assembled arch frame assembling segment 1-1 forward; when the front end of the arch frame assembly section 1-1 moves above the front pier stud, the moved arch frame assembly section 1-1 enters a hoisting area of the cable crane, and at the moment, the front sports car 21 is connected with the front end of the moved arch frame assembly section 1-1 to finish hoisting the front end of the moved arch frame assembly section 1-1 by the front sports car 21; then the arch frame sectional transferring device is utilized to continuously move the arch frame assembling section 1-1 forwards along the longitudinal bridge until the front end of the moved arch frame assembling section 1-1 is moved above the front pier stud, the rear sports car 22 is connected with the rear end of the moved arch frame assembling section 1-1, and the rear sports car 22 is used for hoisting the rear end of the moved arch frame assembling section 1-1; after the rear sports car 22 is connected with the rear end of the moved arch frame assembling section 1-1, the hoisting process of the hoisting device of the cable crane on the arch frame assembling section 1-1 is completed, and the arch frame assembling section 1-1 is hoisted and lowered into place through the hoisting device of the cable crane.
After the moved arch frame assembly segment 1-1 enters the hoisting area of the cable crane, the horizontal limiting piece 9 is used for limiting the horizontal moving device, so that the horizontal moving device can be prevented from moving out to the outer side of the horizontal moving channel, the safe and reliable construction process is ensured, and meanwhile, the arch frame assembly segment 1-1 can not be influenced in any way when continuing to move forwards. In addition, the limiting rope 14 is a brake rope, so that the safety and stability of the moving process of the arch frame assembling segment 1-1 can be further ensured.
In this embodiment, as shown in fig. 1, when the vault splicing section is assembled in step 302, because the length of the vault splicing section 1-01 is shorter, when the cable crane is used to hoist the vault splicing section 1-01, two rear runners 22 in the cable crane are used to hoist the vault splicing section.
When the vault splicing sections are assembled in the step 302, the vault splicing sections 1-01 are translated forwards by adopting the arch frame sectional transferring device; when the vault splicing section 1-01 is translated above the front pier stud, the vault splicing section 1-01 enters a hoisting area of the cable crane, and at the moment, the rear sports car 22 is connected with the middle part of the vault splicing section 1-01, so that the rear sports car 22 hoists the vault splicing section 1-01; and (3) completing the hoisting process of the hoisting device of the cable crane on the arch-top splicing section 1-01, hoisting and lowering the arch-top splicing section 1-01 in place through the hoisting device of the cable crane.
In actual construction, when the vault splicing sections are assembled in step 302, the vault splicing sections 1-01 can also be hoisted synchronously by adopting the two front sports cars 21 and the two rear sports cars 22 according to the method described in step 3011.
As shown in fig. 5, when the arch frame sectional transferring device is adopted to forward translate the currently assembled arch frame assembly section 1-1, the arch frame assembly section 1-1 is moved forward along the longitudinal bridge by utilizing the horizontal moving device, and the horizontal moving device is used for horizontally supporting the front side and the rear side of the arch frame assembly section 1-1 in the moving process, so that the moved arch frame assembly section 1-1 is in a stable state and the moving process is safe and reliable; when the front end of the moved arch frame assembling section 1-1 moves above the front pier stud, the moved arch frame assembling section 1-1 enters a hoisting area of the cable crane, at the moment, the front sports car 21 is connected with the front end of the moved arch frame assembling section 1-1, and the front sports car 21 is used for hoisting the front end of the moved arch frame assembling section 1-1. Then, the horizontal moving device is utilized to continuously move the arch frame assembly section 1-1 forwards along the longitudinal bridge until the front end of the moved arch frame assembly section 1-1 is moved above the front pier stud, and the hoisting action of the front sports car 21 is matched with the horizontal supporting action of the horizontal moving device in the moving process, so that the moved arch frame assembly section 1-1 can be effectively ensured to be in a stable state, and the moving process is ensured to be safe and reliable; as shown in fig. 6, when the front end of the moved arch assembling segment 1-1 moves above the front pier, the rear sports car 22 is connected with the rear end of the moved arch assembling segment 1-1, and the rear sports car 22 is completed to hoist the rear end of the moved arch assembling segment 1-1. After the rear sports car 22 is connected with the rear end of the moved arch frame assembly section 1-1, the moved arch frame assembly section 1-1 is stably hoisted through the front sports car 21 and the rear sports car 22, so that the hoisting process of the cable crane is completed, the practical construction is simple and convenient, and the construction process is safe and reliable.
After the moved arch frame assembly segment 1-1 enters the hoisting area of the cable crane, the horizontal limiting piece 9 is used for limiting the horizontal moving device, so that the horizontal moving device can be prevented from moving out to the outer side of the horizontal moving channel, the safe and reliable construction process is ensured, and meanwhile, the arch frame assembly segment 1-1 can not be influenced in any way when continuing to move forwards. In addition, the limiting rope 14 is a brake rope, so that the safety and stability of the moving process of the arch frame assembling segment 1-1 can be further ensured.
In actual construction, the steel arch for constructing the arch rib 2 is an arch support 100. The assembled steel arch 1 is an arch support 100 or a middle arch in the arch support 100.
When the transverse width of the arched support frame 100 is smaller than the clear distance between the two vertical support frames 17-1 in the rear tower, the assembled steel arch frame 1 is the arched support frame 100; otherwise, when the transverse width of the arch support 100 is not smaller than the clear distance between the two vertical supports 17-1 in the rear tower, the arch support 100 is required to be divided into a plurality of arches from left to right, the assembled steel arch 1 is one arch in the arch support 100, each arch is formed by splicing a plurality of arch assembled sections 1-1 distributed from front to back along the longitudinal bridge direction, and at this time, each arch in the arch support 100 is an assembled steel arch 1.
In the third step, when the steel arch frame is assembled, a plurality of arch frames in the arch support frame 100 are assembled respectively from front to back, each arch frame is an assembled steel arch frame 1, and the assembling methods of the arch frames are the same; when any one of the arches of the arch support 100 is assembled, the assembly is performed according to the method described in steps 301 to 302.
In this embodiment, the width of the arched support 100 in the transverse direction is not smaller than the clear distance between the two vertical supports 17-1 in the rear tower, the arched support 100 is divided into 3 arches from left to right, and the 3 arches are respectively a left arch, a middle arch and a right arch from left to right along the transverse direction.
When steel arch assembly is carried out in the third step, firstly, the middle arch frame is spliced according to the methods from the step 301 to the step 302, then the left arch frame is spliced according to the methods from the step 301 to the step 302, and each arch assembly section 1-1 in the left arch frame is fixedly connected with the middle arch frame into a whole; finally, the right side arches are spliced according to the method described in the steps 301 to 302, and each arch splicing section 1-1 in the right side arches is fastened and connected with the middle arch as a whole.
In this embodiment, after the jacking of the arch support frame in the fourth step is completed, the beam dropping device located right below the arch rib constructed first is installed, and the front end and the rear end of the arch support frame 100 are respectively supported on one beam dropping mechanism; then, the lifting device supported below the arch-shaped supporting frame 100 is removed;
in the fifth step, the vertical moving device is the beam falling device;
when the arch support frame is lowered in the fifth step, the arch support frame 100 in the fourth step is vertically lowered by using the beam falling device supported below the arch support frame 100;
after the arch support frame is lifted, installing the beam falling device positioned right below the rear construction arch rib, and respectively supporting the front end and the rear end of the arch support frame 100 on one beam falling mechanism; the lifting device supported below the arched support frame 100 is then removed.
When the construction is performed on the pre-construction arch rib, firstly, vertically jacking the assembled steel arch (namely the arch support 100) through the steel arch jacking device on the steel arch support until the steel arch is jacked in place, wherein the steel arch is in a supporting state; then, constructing the pre-construction arch rib by using the steel arch frame which is jacked in place; after the construction of the pre-construction arch rib is completed, adopting all temporary supports on the steel arch support to stably lower the steel arch until the transverse distribution beams below the front end and the rear end of the steel arch are horizontally supported on a horizontal support 30-1, so that the steel arch is in a transverse moving state and the transverse installation seat of the steel arch is supported on the horizontal slideway; subsequently, the steel arch is transversely moved by adopting the transverse moving device until the steel arch is moved to a steel arch support right below the rear construction arch rib; and finally, vertically jacking the steel arch moving in place through the steel arch jacking device until the steel arch is jacked in place, and constructing the post-construction arch rib by utilizing the steel arch jacked in place.
All the vertical jacks 32 on the steel arch support are retracted during or before the steel arch is stably lowered by adopting all the temporary supports on the steel arch support. All vertical jacks 32 on the steel arch support directly below the post-construction arch rib are retracted before the steel arch is traversed by the traversing device.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a steel bow member is assembled and sideslip system for construction of upper supporting arch bridge which characterized in that: the device comprises an arch frame assembling device for assembling the steel arch frames and an arch frame supporting and traversing device for supporting and traversing the assembled steel arch frames;
the steel arch is an arch support frame (100) for constructing an arch rib (2) of a constructed upper bearing arch bridge, the front end and the rear end of the arch rib (2) are respectively supported on a permanent support (6), and the permanent support (6) is a reinforced concrete support; the arch ribs (2) are distributed along the longitudinal bridge direction and are reinforced concrete arch rings, the arch ribs (2) are supported right above the arch support frames (100), and the arch support frames (100) are distributed along the longitudinal bridge direction;
The constructed upper-bearing arch bridge comprises a left arch rib (2) and a right arch rib (2) which are symmetrically arranged, wherein a main beam is uniformly distributed right above each arch rib (2); one arch rib (2) in the constructed upper-bearing arch bridge is a first constructed arch rib, and the other arch rib (2) is a later constructed arch rib which is constructed after the construction of the first constructed arch rib is completed;
the front end and the rear end of each girder are respectively supported on a bridge abutment (8), the girders are horizontally arranged and comprise a middle girder section (3) supported on an arch rib (2) and two side girder sections (4) respectively positioned on the front side and the rear side of the middle girder section (3), the middle girder section (3) is connected between the two side girder sections (4) and is arranged along the longitudinal bridge direction, and the middle girder section (3) is fixedly connected with the arch rib (2) through a plurality of vertical upright posts (5) arranged along the longitudinal bridge direction from front to rear; a plurality of supporting pier columns (7) which are vertically distributed are distributed below each side beam section (4) from front to back along the longitudinal bridge direction, the supporting pier columns (7) are reinforced concrete pier columns, each side beam section (4) is supported on one bridge abutment (8) and a plurality of supporting pier columns (7), and one bridge abutment (8) and a plurality of supporting pier columns (7) supported below each side beam section (4) form a side beam section supporting structure; the two side beam section supporting structures below each main beam are respectively a front side beam section supporting structure positioned at the front side of the arch rib (2) and a rear side beam section supporting structure positioned at the rear side of the arch rib (2), and the two permanent supports (6) are respectively a front side permanent support positioned below the front end of the arch rib (2) and a rear side permanent support positioned below the rear end of the arch rib (2);
The arch support frame (100) is formed by splicing a spliced steel arch (1) or a plurality of spliced steel arches (1) which are arranged from left to right along a transverse bridge direction, each spliced steel arch (1) is an arch, each spliced steel arch (1) is arranged along a longitudinal bridge direction and is formed by splicing a plurality of arch splicing sections (1-1) which are arranged from front to back along the longitudinal bridge direction;
the arch frame assembling device comprises a cable crane for hoisting arch frame assembling sections (1-1) of the assembled steel arch frame (1) and an arch frame sectional transferring device for moving the arch frame assembling sections (1-1) one by one;
the arch frame sectional transferring device comprises an assembling section moving device for horizontally moving the arch frame assembling sections (1-1) one by one and a horizontal moving channel for horizontally moving the assembling section moving device, wherein the horizontal moving channel is horizontally arranged and is arranged along a longitudinal bridge direction;
the horizontal moving channel is arranged on the rear side beam section supporting structure right behind the pre-construction arch rib, and the rear side beam section supporting structure right behind the pre-construction arch rib is a moving channel supporting structure; the horizontal moving channel comprises a longitudinal supporting beam (3-1) supported on the moving channel supporting structure, the assembly section moving device is a horizontal moving device which can move back and forth on the longitudinal supporting beam (3-1) and drive the assembly section (1-1) of the moved arch to synchronously move in the moving process, and the longitudinal supporting beam (3-1) is horizontally arranged and is arranged along the longitudinal bridge direction; the horizontal moving device is arranged on the longitudinal supporting beam (3-1), and the movable arch frame assembly section (1-1) is horizontally supported on the horizontal moving device; the rear end of the longitudinal support beam (3-1) is a bridge abutment supporting end supported on a bridge abutment (8) in the moving channel supporting structure, and the front end of the longitudinal support beam (3-1) is a hoisting end; a horizontal limiting piece (9) for limiting the horizontal moving device is arranged on the lifting end of the longitudinal supporting beam (3-1);
The cable crane comprises a front tower (17) and a rear tower (17), working cables (17-8) arranged on the two towers (17) and a trolley capable of moving back and forth along the working cables (17-8) and hoisting the arch frame assembly section (1-1), wherein the trolley is arranged on the working cables (17-8) and is positioned between the two towers (17), and the trolley is positioned above the pre-construction arch rib; the two towers (17), the pre-construction arch rib and the longitudinal supporting beam (3-1) are positioned on the same vertical surface, and the two towers (17) are respectively a front tower positioned at the front side of the pre-construction arch rib and a rear tower positioned at the rear side of the pre-construction arch rib;
the support pier column (7) at the forefront side in the rear side beam section support structure is a front pier column, the lifting end of the longitudinal support beam (3-1) is positioned at the front side of the rear tower, the lifting end of the longitudinal support beam (3-1) is supported on the front pier column, and the longitudinal support beam (3-1) is a horizontal support beam penetrating through the middle of the rear tower; the rear tower and the front pier stud are both supported on the rear permanent support, and the front pier stud is positioned at the front side of the rear tower;
the arch support and traversing device comprises a translation device for translating the arch support frame (100) along a transverse bridge, a left lifting device and a right lifting device which are symmetrically arranged and move the arch support frame (100) up and down, and two steel arch supports which are symmetrically arranged and support the arch support frame (100), wherein each steel arch support is positioned under one arch rib (2); a transverse distribution beam is arranged below the front end and the rear end of the arched support frame (100), and is horizontally distributed along the transverse bridge direction; the bottoms of the front end and the rear end of the arched support frame (100) are respectively provided with a transverse installation seat, the transverse installation seats are horizontally distributed and are distributed along the transverse bridge direction, and each transverse distribution beam is arranged at the bottom of one transverse installation seat;
Each steel arch support comprises a front temporary arch seat and a rear temporary arch seat which are symmetrically distributed, wherein the two temporary arch seats are distributed along the transverse bridge direction and are respectively a front support for supporting the front end of an arch support frame (100) and a rear support for supporting the rear end of the arch support frame (100);
each temporary arch abutment is an L-shaped support (30); the L-shaped support (30) comprises a horizontal support (30-1) and a vertical support (30-2) arranged above the outer side of the horizontal support (30-1), the horizontal support (30-1) and the vertical support (30-2) are both arranged along the transverse bridge direction and are reinforced concrete supports, and the horizontal support (30-1) and the vertical support (30-2) in each temporary arch support are cast into a whole; m vertical grooves (31) which are distributed on the same vertical surface are formed in each horizontal support (30-1), the structures and the sizes of the M vertical grooves (31) are the same, and the M vertical grooves are distributed from left to right along a transverse bridge; wherein M is a positive integer and M is more than or equal to 3; each vertical groove (31) is a cube groove; m vertical grooves (31) in each temporary arch seat are positioned on the inner side of the vertical support (30-2);
the front supports of the two steel arch supports form a front support, and the rear supports of the two steel arch supports form a rear support; all vertical grooves (31) in the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all vertical grooves (31) in the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction;
Each lifting device is uniformly distributed on one steel arch support; each lifting device comprises a front lifting mechanism and a rear lifting mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one lifting mechanism; each lifting mechanism comprises N vertical jacks (32) which are distributed on the same vertical surface from left to right along the transverse bridge direction, the structures and the sizes of the N vertical jacks (32) are the same, the N vertical jacks are uniformly distributed on the same horizontal surface, and the vertical jacks (32) are hydraulic jacks distributed vertically; wherein N is a positive integer, and N is more than or equal to 2 and less than or equal to M; each vertical jack (32) is uniformly distributed in one vertical groove (31);
all the vertical jacks (32) on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical jacks (32) on the front support form a front jacking device; all the vertical jacks (32) on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along the transverse bridge direction, and all the vertical jacks (32) on the rear support form a rear jacking device; the front side jacking device is positioned right below one transverse distribution beam, and the rear side jacking device is positioned right below the other transverse distribution beam; all the vertical jacks (32) on each steel arch support form a steel arch jacking device for synchronously jacking the arch support frame (100);
The translation device comprises a front translation slideway (33) and a rear translation slideway which are symmetrically arranged and used for the translation of the transverse installation seat, and a front transverse driving device and a rear transverse driving device which synchronously drive the arched support frame (100) to translate along the transverse bridge direction, wherein the two transverse driving devices are symmetrically arranged, and the translation slideway (33) is horizontally arranged and is arranged along the transverse bridge direction; each transverse moving driving device comprises a pushing jack (41) for horizontally pushing the transverse distribution beam along the transverse bridge direction, and the pushing jacks (41) are horizontally arranged and are arranged along the transverse bridge direction; each pushing jack (41) and one transverse distribution beam are arranged on the same vertical surface, and the pushing jacks (41) prop against the transverse distribution beams on the same vertical surface;
the two translation slideways (33) are respectively a front slideway arranged on the front support and a rear slideway arranged on the rear support; a horizontal slideway for the horizontal installation seat to translate is arranged on the inner side wall of each vertical support (30-2), and the horizontal slideway is arranged along the transverse bridge direction and is positioned below the horizontal installation seat; the horizontal slides installed on the two vertical supports (30-2) in the front side support are arranged on the same horizontal straight line and form the front side slide, and the horizontal slides installed on the two vertical supports (30-2) in the rear side support are arranged on the same horizontal straight line and form the rear side slide.
2. The steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1, wherein: each transverse movement driving device further comprises a counter-force frame (37) for providing counter-force for the pushing jack (41), each counter-force frame (37) and one pushing jack (41) are arranged on the same vertical surface, and each pushing jack (41) is located between one counter-force frame (37) and the steel arch.
3. A steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1 or 2, wherein: the arch support and traversing device also comprises left and right symmetrically arranged girder dropping devices, and each girder dropping device is uniformly distributed on one steel arch support; each beam falling device comprises a front beam falling mechanism and a rear beam falling mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one beam falling mechanism; each beam falling mechanism comprises H temporary supports which are arranged on the same vertical surface from left to right along the transverse bridge direction and used for supporting the steel arch in the descending process, the temporary supports are vertically arranged, the structures and the sizes of the H temporary supports are the same, and the H temporary supports are uniformly arranged on the same horizontal plane; wherein H is a positive integer and H is less than or equal to M; each temporary support is uniformly distributed in one vertical groove (31);
All temporary supports on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the front support form a front girder falling support; all temporary supports on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the rear support form a rear girder falling support; the front side drop beam support is positioned right below one transverse distribution beam, and the rear side drop beam support is positioned right below the other transverse distribution beam; all temporary supports on each steel arch support form a steel arch girder falling support for synchronously supporting the steel arch;
the temporary support is a sand cylinder (34) or a sand box.
4. A steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1 or 2, wherein: the front arch leg and the rear arch leg of the arch support frame (100) are respectively supported on an arch frame hinging seat (20), the arch frame hinging seat (20) is the transverse installation seat, and the transverse distribution beam is an arch frame beam (23) arranged at the bottom of the arch frame hinging seat (20); the arch-shaped supporting frames (100) are vertically distributed and are distributed along the longitudinal bridge direction;
The arch support frame (100) comprises a front arch leg section (1-100) and a rear arch leg section (1-100) which are symmetrically arranged, and a bearing steel arch frame connected between the two arch leg sections (1-100), wherein the bearing steel arch frame and the two arch leg sections (1-100) are arranged along the longitudinal bridge direction;
the bottoms of the two arch leg sections (1-100) are respectively provided with a transverse steel pipe (1-11) horizontally supported on an arch frame hinging seat (20), the transverse steel pipes (1-11) are horizontally arranged and are arranged along the transverse bridge direction, and the transverse steel pipes (1-11) are round steel pipes; each transverse steel pipe (1-11) is supported on one arch frame hinging seat (20), and each transverse steel pipe (1-11) is connected with the arch frame hinging seat (20) supported by the transverse steel pipe in a hinging manner;
the arch centering hinging seat (20) comprises a horizontal supporting seat supported on an arch centering beam (23) and a supporting steel plate (20-1) supported on the horizontal supporting seat, wherein the horizontal supporting seat and the supporting steel plate (20-1) are horizontally arranged and are arranged along the transverse bridge direction; the cross section of each supporting steel plate (20-1) is arc-shaped, each transverse steel pipe (1-11) is supported on one supporting steel plate (20-1), each transverse steel pipe (1-11) and the supporting steel plate (20-1) supported by the transverse steel pipe are coaxially distributed, and the supporting steel plate (20-1) is positioned below the outer side of the supported transverse steel pipe (1-11).
5. A steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1 or 2, wherein: the two bridge abutments (8) below the pre-construction arch rib are respectively a front bridge abutment supported below the front end of the main beam and a rear bridge abutment supported below the rear end of the main beam, a front anchor ingot (15-1) is arranged right in front of the front bridge abutment, and a rear anchor ingot (15-2) is arranged right behind the rear bridge abutment;
each tower (17) is provided with an arch temporary fixing mechanism, each arch temporary fixing mechanism comprises a left group of buckling ropes (17-10) and a right group of buckling ropes, wherein the buckling ropes are symmetrically distributed, and temporarily fix the arch assembling sections (1-1) which are hoisted in place, and each group of buckling ropes (17-10) and one vertical supporting frame (17-1) are distributed on the same vertical plane; each group of buckling ropes (17-10) comprises a plurality of buckling ropes (17-10) which are arranged on the same vertical surface from top to bottom, and the plurality of buckling ropes (17-10) are arranged along the longitudinal bridge direction;
a plurality of buckling rope pulleys (17-11) for installing buckling ropes (17-10) are arranged on each vertical supporting frame (17-1) in the cable crane from top to bottom, all the buckling rope pulleys (17-11) arranged on each vertical supporting frame (17-1) are positioned on the same vertical plane, and each buckling rope (17-10) is arranged on one buckling rope pulley (17-11);
The front end of each buckling rope (17-10) in the rear tower is fixed on an arch frame assembling section (1-1) which is hoisted in place, and the rear end of each buckling rope (17-10) in the rear tower is fixed on a rear anchor (15-2);
the rear end of each buckling rope (17-10) in the front tower is fixed on one arch frame assembly section (1-1), and the front end of each buckling rope (17-10) in the front tower is fixed on a front anchor block (15-1).
6. A steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1 or 2, wherein: each tower (17) comprises an assembled frame body, and the assembled frame body comprises a left vertical support frame (17-1) and a right vertical support frame which are symmetrically distributed; two vertical support frames (17-1) in the rear tower are supported on the rear permanent support, the two vertical support frames (17-1) in the rear tower are symmetrically arranged on the left side and the right side of the horizontal moving channel, and the clear distance between the two vertical support frames (17-1) in the rear tower is larger than the width of the horizontal moving channel;
each tower (17) further comprises a tower base (17-3) for mounting at the bottom of the assembled frame body, the tower bases (17-3) are horizontally arranged and are arranged along the transverse bridge direction, and the assembled frame body is positioned right above the tower bases (17-3);
The bottom of each vertical supporting frame (17-1) is provided with a tripod (17-4) arranged on the tower base (17-3), and the bottoms of the tripod (17-4) are connected with the tower base (17-3) positioned below the tripod in a hinged manner; a bottom distribution beam (17-7) is arranged right below each tower base (17-3), and the bottom distribution beams (17-7) are horizontally arranged and are arranged along the transverse bridge direction; a bottom distribution beam (17-7) at the bottom of the rear tower is fixed to the rear permanent support, and a bottom distribution beam (17-7) at the bottom of the front tower is fixed to the front permanent support.
7. A steel arch assembling and traversing system for constructing an upper-bearing arch bridge according to claim 1 or 2, wherein: a cable saddle (21) for installing a working cable (17-8) is arranged on each vertical supporting frame (17-1) in the tower (17);
the number of the working ropes (17-8) is two, the two working ropes (17-8) are distributed along the longitudinal bridge direction and are symmetrically distributed above the left side and the right side of the pre-construction arch rib; each working cable (17-8) is provided with a front lifting trolley and a rear lifting trolley, and the two lifting trolleys are positioned between the two towers (17); the hoisting device is used for hoisting the paired arch frame assembly sections (1-1) of the four hoisting trolley groups in the cable crane;
The two working ropes (17-8) are respectively a left working rope and a right working rope positioned on the right side of the left working rope, and the two vertical supporting frames (17-1) in each tower (17) are respectively a left supporting frame and a right supporting frame positioned on the right side of the left supporting frame; the left working cable is supported on the left support frames of the two towers (17), and the right working cable is supported on the right support frames of the two towers (17).
8. A method for assembling and traversing a steel arch for constructing an upper-bearing arch bridge by using the system of claim 1, which is characterized in that: each spliced steel arch (1) in the spliced steel arch comprises a vault splicing section (1-01) and front and rear symmetrically arranged side splicing frames, the vault splicing section (1-01) is connected between the two side splicing frames, each side splicing frame is formed by splicing a plurality of arch splicing sections (1-1) arranged from bottom to top, and each vault splicing section is one arch splicing section (1-1); the assembled steel arch is an arch support frame (100);
when assembling and traversing the assembled steel arch, the method comprises the following steps:
Step one, constructing a bridge lower support structure and a steel arch support, and installing a translation slideway and a lifting device: respectively constructing two permanent supports (6) and two side beam section supporting structures below each main beam in the constructed upper arch bridge to obtain a front side beam section supporting structure, a rear side beam section supporting structure, a front permanent support and a rear permanent support which are formed by construction;
simultaneously, constructing two steel arch supports in the arch support and traversing device to obtain a front support and a rear support which are formed by construction;
after the construction of the front side support and the rear side support is completed, respectively installing a translation slideway (33) on the front side support and the rear side support which are formed by construction; simultaneously, installing one lifting device on each of the two steel arch supports formed by construction;
step two, construction of a cable crane and an arch frame sectional transferring device: constructing the horizontal moving channel on the rear side beam section supporting structure right behind the pre-constructed arch rib, and installing the assembling section moving device on the horizontal moving channel to obtain the arch frame sectional transferring device with the construction completed; simultaneously, constructing the cable crane, and supporting the rear tower in the cable crane on the rear permanent support at the rear side of the pre-construction arch rib;
Step three, assembling the steel arch frame: assembling the arch support frames (100), enabling the assembled arch support frames (100) to be located under the pre-construction arch ribs, enabling the assembled arch support frames (100) to be supported on one lifting device under the pre-construction arch ribs, and enabling the front end and the rear end of each arch support frame (100) to be respectively supported on one lifting mechanism;
when the arch support frames (100) are assembled, all the assembled steel arches (1) in the arch support frames (100) are assembled from first to second, and the assembling methods of all the assembled steel arches (1) in the arch support frames (100) are the same;
when assembling the arch support frame (100), the method comprises the following steps:
step 301, splicing the side splicing frames: symmetrically splicing the two side splicing frames of one splicing type steel arch (1) in the arch support frame (100);
when any side splicing frame is spliced, a plurality of arch frame splicing sections (1-1) forming the side splicing frame are spliced from bottom to top, and the process is as follows:
step 3011, assembling a first arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the currently assembled arch frame assembling section (1-1) to the position above the front end of the horizontal moving channel, and then the hoisting trolley of the cable crane is adopted to hoist and lower the arch frame assembling section (1-1) in place, so that the assembling process of the currently assembled arch frame assembling section (1-1) is completed;
In the step, the currently spliced arch frame splicing section (1-1) is the lowest arch frame splicing section (1-1) of the side splicing frame;
step 3012, assembling the last arch frame assembling section: the arch frame sectional transferring device is adopted to forward translate the last spliced arch frame splicing section (1-1) to the position above the front end of the horizontal moving channel, then the hoisting trolley of the cable crane is adopted to hoist and lower the arch frame splicing section (1-1) in place, and meanwhile the arch frame splicing section (1-1) which is put in place is connected with the arch frame splicing section (1-1) which is positioned below the arch frame splicing section and is spliced, so that the splicing process of the current spliced arch frame splicing section (1-1) is completed;
step 3013, repeating step 3012 one or more times, completing the assembling process of all arch frame assembling sections (1-1) in the side splicing frames, and obtaining the assembled side splicing frames;
step 302, splicing vault splicing sections: after the two side splicing frames of the assembled steel arch frame (1) are assembled, adopting the arch frame segmentation transfer device to forward translate the arch frame splicing section (1-01) to the position above the front end of the horizontal moving channel, then adopting the crane trolley of the cable crane to hoist and lower the arch frame splicing section (1-01) in place, and simultaneously connecting the arch frame splicing section (1-01) which is lowered in place with the two assembled side splicing frames to finish the folding process of the assembled steel arch frame (1) to obtain the assembled steel arch frame (1);
Step 303, judging the assembly completion of the arched support frame: judging whether the arched support frames (100) are assembled or not, and when the arched support frames (100) are assembled, completing the assembling process of the arched support frames (100) and entering a step four; otherwise, go to step 304;
step 304, splicing the next spliced steel arch frame: assembling the next assembled steel arch (1) in the arch support frame (100) according to the method in the steps 301 to 302, and connecting each arch assembly section (1-1) in the assembled steel arch (1) assembled at present with the assembled steel arch (1) assembled at the moment;
step 305, assembling completion judgment of the arch support frame: judging whether the arched support frames (100) are assembled or not, and entering a step four when the arched support frames (100) are assembled; otherwise, returning to step 304;
step four, jacking an arch support frame: the arch support frame (100) is vertically lifted upwards by adopting the lifting device supported below the arch support frame (100) until the arch support frame (100) is lifted to the construction position of the arch rib firstly constructed;
step five, the arch support frame is lowered: the arched support frame (100) in the fourth step is vertically lowered by adopting the lifting device or the vertical moving device supported below the arched support frame (100) until the front end and the rear end of the arched support frame (100) are respectively supported on one translation slideway (33);
Step six, mounting a transverse movement driving device: the front transverse driving device and the rear transverse driving device are respectively installed to obtain the translation device with the installation completed, each pushing jack (41) in the translation device and one transverse distribution beam in the arched support frame (100) are arranged on the same vertical surface, and the pushing jacks (41) prop up on the transverse distribution beams positioned on the same vertical surface;
seventh, transversely moving the arched support frame: synchronously driving the arch support frame (100) to translate towards one side of the rear construction arch rib along the transverse bridge by utilizing the front and rear transverse movement driving devices in the step six until the arch support frame (100) is moved to the position right below the rear construction arch rib, simultaneously enabling the arch support frame (100) to be supported on one lifting device right below the rear construction arch rib, and enabling the front and rear ends of the arch support frame (100) to be respectively supported on one lifting mechanism;
step eight, jacking an arch support frame: and the arch support frame (100) is vertically lifted upwards by adopting the lifting device supported below the arch support frame (100) until the arch support frame (100) is lifted to the construction position of the rear construction arch rib.
9. The method according to claim 8, wherein: the two side splicing frames are respectively a front splicing frame positioned at the front side of the vault splicing section (1-01) and a rear splicing frame positioned at the rear side of the vault splicing section (1-01);
the two bridge decks (8) are respectively a front bridge deck supported below the front end of the main beam and a rear bridge deck supported below the rear end of the main beam, a front anchor ingot (15-1) is arranged right in front of the front bridge deck, and a rear anchor ingot (15-2) is arranged right behind the rear bridge deck;
each tower (17) is provided with an arch temporary fixing mechanism, each arch temporary fixing mechanism comprises a left group of buckling ropes (17-10) and a right group of buckling ropes, wherein the buckling ropes are symmetrically distributed, and temporarily fix the arch assembling sections (1-1) which are hoisted in place, and each group of buckling ropes (17-10) and one vertical supporting frame (17-1) are distributed on the same vertical plane; each group of buckling ropes (17-10) comprises a plurality of buckling ropes (17-10) which are arranged on the same vertical surface from top to bottom, and the plurality of buckling ropes (17-10) are arranged along the longitudinal bridge direction;
a plurality of buckling rope pulleys (17-11) for installing buckling ropes (17-10) are arranged on the vertical supporting frames (17-1) in the cable crane from top to bottom, all the buckling rope pulleys (17-11) arranged on each vertical supporting frame (17-1) are positioned on the same vertical plane, and each buckling rope (17-10) is arranged on one buckling rope pulley (17-11);
The front end of each buckling rope (17-10) in the rear tower is fixed on an arch frame assembling section (1-1) which is hoisted in place in the rear side assembling frame, and the rear end of each buckling rope (17-10) in the rear tower is fixed on a rear anchor ingot (15-2);
the rear end of each buckling rope (17-10) in the front tower is fixed on one arch frame assembly section (1-1) in the front side assembly frame, and the front end of each buckling rope (17-10) in the front tower is fixed on a front anchor ingot (15-1);
in step 3012, after the arch frame assembly section (1-1) which is put in place is connected with the arch frame assembly section (1-1) which is positioned below the arch frame assembly section and is assembled, the arch frame assembly section (1-1) assembled in the step is also required to be temporarily fixed through one buckling rope (17-10);
the arch support and traversing device also comprises left and right symmetrically arranged girder dropping devices, and each girder dropping device is uniformly distributed on one steel arch support; each beam falling device comprises a front beam falling mechanism and a rear beam falling mechanism which are symmetrically arranged, and each temporary arch seat is uniformly provided with one beam falling mechanism; each beam falling mechanism comprises H temporary supports which are arranged on the same vertical surface from left to right along the transverse bridge direction and used for supporting the steel arch in the descending process, the temporary supports are vertically arranged, the structures and the sizes of the H temporary supports are the same, and the H temporary supports are uniformly arranged on the same horizontal plane; wherein H is a positive integer and H is less than or equal to M; each temporary support is uniformly distributed in one vertical groove (31);
All temporary supports on the front support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the front support form a front girder falling support; all temporary supports on the rear support are uniformly distributed on the same horizontal plane and are distributed on the same vertical plane from left to right along a transverse bridge, and all temporary supports on the rear support form a rear girder falling support; the front side drop beam support is positioned right below one transverse distribution beam, and the rear side drop beam support is positioned right below the other transverse distribution beam; all temporary supports on each steel arch support form a steel arch girder falling support for synchronously supporting the steel arch;
the temporary support is a sand cylinder (34) or a sand box;
after the jacking of the arch support frame is completed, installing the girder dropping device positioned right below the pre-construction arch rib, and respectively supporting the front end and the rear end of the arch support frame (100) on one girder dropping mechanism; then, the lifting device supported below the arch-shaped supporting frame (100) is removed;
in the fifth step, the vertical moving device is the beam falling device;
When the arch support frame is lowered in the fifth step, the arch support frame (100) in the fourth step is vertically lowered by utilizing the beam falling device supported below the arch support frame (100);
after the jacking of the arch support frame is completed, installing the beam falling device positioned right below the rear construction arch rib, and respectively supporting the front end and the rear end of the arch support frame (100) on one beam falling mechanism; the lifting device supported below the arch support (100) is then removed.
10. A method according to claim 8 or 9, characterized in that: the number of the working cables (17-8) is two, the two working cables (17-8) are distributed along the longitudinal bridge direction and are symmetrically distributed above the left side and the right side of the assembled steel arch (1); each working cable (17-8) is provided with a front lifting trolley and a rear lifting trolley, the two lifting trolleys are positioned between the two towers (17), and the two lifting trolleys are respectively a front running trolley (21) and a rear running trolley (22) positioned at the rear side of the front running trolley (21); the hoisting device is used for hoisting the paired arch frame assembly sections (1-1) of the four hoisting trolley groups in the cable crane;
the two working ropes (17-8) are respectively a left working rope and a right working rope positioned on the right side of the left working rope, and the two vertical supporting frames (17-1) in each tower (17) are respectively a left supporting frame and a right supporting frame positioned on the right side of the left supporting frame; the left working cable is supported on the left supporting frames of the two towers (17), and the right working cable is supported on the right supporting frames of the two towers (17);
When the first arch frame assembling section is assembled in the step 3011 and the last arch frame assembling section is assembled in the step 3012, the arch frame sectional transferring device is adopted to move the currently assembled arch frame assembling section (1-1) forward in a translation mode; when the front end of the arch frame assembly section (1-1) moves above the front pier stud, the moved arch frame assembly section (1-1) enters a hoisting area of the cable crane, at the moment, a front sports car (21) is connected with the front end of the moved arch frame assembly section (1-1), and the front sports car (21) is used for hoisting the front end of the moved arch frame assembly section (1-1); then, the arch frame sectional transferring device is utilized to continuously move the arch frame assembly section (1-1) forwards along the longitudinal bridge direction until the front end of the moved arch frame assembly section (1-1) is moved to the position above the front pier column, a rear sports car (22) is connected with the rear end of the moved arch frame assembly section (1-1), and the rear sports car (22) is used for hoisting the rear end of the moved arch frame assembly section (1-1); after the rear sports car (22) is connected with the rear end of the movable arch frame assembling section (1-1), the hoisting process of the arch frame assembling section (1-1) by the hoisting device of the cable crane is completed, and the arch frame assembling section (1-1) is hoisted and lowered into place by the hoisting device of the cable crane.
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| CN113215992B (en) * | 2021-04-27 | 2022-09-09 | 中铁建大桥工程局集团南方工程有限公司 | Assembling control method for sling tower frame for construction of steel truss arch bridge by inclined pulling buckling hanging method |
| CN114319131B (en) * | 2022-01-14 | 2024-03-26 | 上海天演建筑物移位工程股份有限公司 | Arch bridge jacking device and jacking method thereof |
| CN114351570A (en) * | 2022-01-27 | 2022-04-15 | 北京交通大学 | Transverse equivalent TMD damping control system |
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