CN111483925B - Asynchronous basket of hanging of wave form steel web bridge - Google Patents
Asynchronous basket of hanging of wave form steel web bridge Download PDFInfo
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- CN111483925B CN111483925B CN202010310327.4A CN202010310327A CN111483925B CN 111483925 B CN111483925 B CN 111483925B CN 202010310327 A CN202010310327 A CN 202010310327A CN 111483925 B CN111483925 B CN 111483925B
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- steel web
- corrugated steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
- B66C17/06—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports specially adapted for particular purposes, e.g. in foundries, forges; combined with auxiliary apparatus serving particular purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C7/00—Runways, tracks or trackways for trolleys or cranes
- B66C7/08—Constructional features of runway rails or rail mountings
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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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- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The invention solves the defects that the existing corrugated steel web bridge adopts a tower crane to hoist the corrugated steel web, the tower crane occupies long time and the use of the tower crane is limited, and provides an asynchronous hanging basket of the corrugated steel web bridge, which comprises a movable supporting lower layer and a corrugated steel web hoisting upper layer which are fixed with each other, wherein the movable supporting lower layer comprises four supporting legs supported in steel plate grooves of an upper wing of the corrugated steel web, two lower layer cross beams transversely connected with the supporting legs and two parallel lower layer longitudinal beams longitudinally connected with the supporting legs; the hoisting upper layer of the corrugated steel web comprises four upright posts vertically and fixedly connected with two lower-layer cross beams, two upper-layer main cross beams transversely connected with the top ends of the upright posts, and two longitudinal beam guide rails fixed with the upper-layer main cross beams; the transverse moving device is connected below the longitudinal beam guide rail and can move along the axial direction of the longitudinal beam guide rail, and the transverse moving device comprises a transverse beam slide rail and a hoisting device which is arranged on the transverse beam slide rail and can move along the axial direction of the transverse beam slide rail.
Description
Technical Field
The invention belongs to the field of bridge construction, and particularly relates to an asynchronous hanging basket for a corrugated steel web bridge.
Background
Bridge refers to a building constructed for a road to cross natural or artificial obstacles. The bridge is divided into five basic types, namely a beam bridge, an arch bridge, a rigid bridge, a suspension bridge and a combined system bridge (a cable-stayed bridge) according to the stress characteristics. Most of the structural load of the concrete beam bridge is used for resisting the dead weight of the bridge, and the second-stage live load is only a small part, so that the reduction of the dead weight of the bridge is beneficial to increasing the span of the bridge and reducing the construction cost.
The corrugated steel web bridge is a novel steel-concrete composite structure bridge, the top and the bottom plates of the box girder are generally concrete, the web is a corrugated steel web, a shear connection key is connected between the steel web and the concrete top and bottom plates, and compared with the traditional concrete box girder, the corrugated steel web bridge has outstanding effects on reducing the dead weight of the box girder, reducing the temperature of concrete, shrinking deformation stress, improving the pre-stress efficiency and the like.
Due to the characteristics of light dead weight and large span of the corrugated steel web bridge, the equipment matched with the cantilever construction mainly adopts the large tower crane, and the lease cost of the large tower crane is extremely high along with the rapid development of domestic capital construction. And when the bridge is in a special landform, such as mountain areas, urban area overline, pipeline influence and the like, the rotation radius of the tower crane is limited, so that the whole bridge cannot be covered, and further the hoisting of the corrugated steel web plate cannot be carried out. And in the hoisting process of the corrugated steel web, the tower crane is used all the time, and before the corrugated steel web is installed, the tower crane can not perform other operations. One bridge pier edge is only provided with one tower crane at most, so that the corrugated steel web plates are hoisted and installed one by one when being installed, and the construction efficiency is lower. How to carry out hoisting construction of the corrugated steel web under the limitation of special environment, and simultaneously reduce construction cost and improve efficiency becomes a difficult problem in construction and needs to be solved.
Disclosure of Invention
The invention overcomes the defects that the existing corrugated steel web bridge adopts a tower crane to hoist the corrugated steel web, the occupied time of the tower crane is long, and the use of the tower crane is limited, provides the asynchronous hanging basket of the corrugated steel web bridge, completes the movement, installation and hanging of the corrugated steel web on the bridge through the asynchronous hanging basket, and shortens the occupied time of the tower crane.
The invention solves the defect that the installation efficiency of the corrugated steel web is low because the existing corrugated steel web bridge is hoisted by adopting a tower crane to only hoist the corrugated steel web in a one-hoisting one-installation mode, and provides an asynchronous hanging basket of the corrugated steel web bridge.
The invention solves the defects that the existing corrugated steel web bridge is hoisted by adopting a tower crane to hoist the corrugated steel web, the length of a boom of the tower crane needs to be longer, the limit of the terrain where the bridge is located is received, and the renting cost is higher.
The specific technical scheme of the invention is as follows: the asynchronous hanging basket for the corrugated steel web bridge comprises a movable support lower layer and a corrugated steel web hoisting upper layer which are fixed with each other, wherein the height of the movable support lower layer is limited to be the minimum height required by construction of a corrugated steel web bridge top plate, and the height of the corrugated steel web hoisting upper layer is limited to be the minimum height required by horizontal translation of the corrugated steel web; the movable support lower layer comprises four support legs supported in the groove of the steel plate with the opening of the upper wing of the corrugated steel web plate, two lower layer cross beams transversely connected with the support legs and two parallel lower layer longitudinal beams longitudinally connected with the support legs; the hoisting upper layer of the corrugated steel web comprises four upright posts vertically and fixedly connected with two lower-layer cross beams, two upper-layer main cross beams transversely connected with the top ends of the upright posts, and two longitudinal beam guide rails fixed with the upper-layer main cross beams; the transverse moving device is connected below the longitudinal beam guide rail and can move along the axial direction of the longitudinal beam guide rail, and comprises a transverse beam slide rail and a hoisting device which is arranged on the transverse beam slide rail and can move along the axial direction of the transverse beam slide rail; the minimum effective length of the transverse beam slide rail is greater than the maximum height of the corrugated steel web; the length of the longitudinal beam guide rail extending out of the front side and the rear side of the movable support lower layer is at least 1/2 greater than the length of the corrugated steel web.
Asynchronous basket of hanging moves the upper strata of supporting the lower floor at the wave form steel web and moves in the trompil steel sheet recess of upper limb of wave form steel web through removing, remove the higher authority that supports the lower floor and be wave form steel web hoist and mount the upper strata, this wave form steel web hoist and mount the upper strata can hoist wave form steel web, the tower crane directly hoists wave form steel web to the bridge floor from the underbridge like this, hoist and mount at the bridge floor position by asynchronous basket of hanging again, the rising of wave form steel web is lifted by the tower crane and is accomplished, the rising of a wave form steel web can carry out the lifting of next wave form steel web after lifting, it can all accomplish through asynchronous basket to arrange wave form steel web in the removal of bridge floor in, occupation time to the tower crane like this is few, after lifting wave form steel web, other hoist and mount work can be carried out completely to the tower crane, the work efficiency and the work efficiency of tower crane can all improve. The movement of the corrugated steel web on the bridge floor is completed through the asynchronous hanging basket, namely the requirement on the length of a suspension arm of the tower crane is reduced, the model selection of the tower crane is not limited by a bridge span any more, and the cost of the tower crane is reduced. The corrugated steel web is hoisted by the hanging basket when being installed, the corrugated steel web can be simultaneously constructed and installed in large and small mileage, two working faces are constructed in parallel, the construction and installation effects are improved, and meanwhile the construction period can be shortened. Remove and support the lower floor and remove in wave form steel web upper limb trompil steel sheet recess, also accomplish the construction at wave form steel web bridge top through the hoist and mount of removing the support lower floor simultaneously, consequently remove the height that supports the lower floor height and will satisfy bridge top construction needs to furthest reduces and removes the height of support lower floor, and then reduces wave form steel web hoist and mount upper strata focus height, makes the basket of hanging remove more steadily, and factor of safety improves. The corrugated steel web plate hoisting upper layer relative movement supports the lower layer and belongs to a second layer structure, due to the structural characteristic that the lower layer is supported in the movement, the corrugated steel web plate is hoisted by the corrugated steel web plate hoisting upper layer to complete the hoisting work of the bridge deck, the height of the corrugated steel web plate hoisting upper layer can be designed by passing through the horizontal state of the corrugated steel web plate, the horizontal state of the corrugated steel web plate is translated, the windward side of the corrugated steel web plate at the high altitude is reduced, the wind resistance is reduced, and the construction safety is improved. Reduce the focus height on second floor, after the focus reduces, the high reduction of stand reduces the whole weight of hanging the basket, and is little to the influence of wave form steel web, also safer when removing in last wing trompil steel sheet recess. The longitudinal beam guide rail is arranged along the bridge direction, and the transverse moving device can move on the longitudinal beam guide rail along the axis direction to move the corrugated steel web plate on the bridge floor from the rear side position to the front side installation position; the transverse moving device comprises a transverse beam slide rail and a lifting device, the lifting device is used for lifting the corrugated steel web, and the lifting device can move on the transverse beam slide rail, so that the position of the corrugated steel web in the transverse bridge direction is changed, and a longitudinal beam guide rail is combined, so that the corrugated steel web can be adjusted along the bridge and the transverse bridge in two directions.
Preferably, the longitudinal beam guide rail on the upper layer of the corrugated steel web plate is in an unequal-arm design relative to the lower layer of the movable support, and the length of the longitudinal beam guide rail extending out of the front side of the lower layer of the movable support is greater than the length of the longitudinal beam guide rail extending out of the rear side of the lower layer of the movable support; the upper layer of the corrugated steel web plate hoisting is provided with a safe stay cable device. Due to the unequal arm design of the longitudinal beam guide rail, the front end cantilever is longer, the rear end cantilever is shorter, the front end is a mounting and fixing position of the corrugated steel web plate, the adjustment range of the front end cantilever is wider, and the construction and the operation are both convenient; the rear end of the longitudinal beam guide rail is only required to finish the work of hanging the corrugated steel web on the bridge floor, so that the cantilever at the rear end of the longitudinal beam guide rail is shorter in length. On the basis of meeting the requirements of hoisting, moving and construction, the length of the longitudinal beam guide rail is shortened as much as possible, and the weight is reduced. Considering the change of the position of the acting force brought to the hanging basket by unequal arm design of the longitudinal beam guide rail, the safe stay cable device is arranged on the upper layer of the corrugated steel web plate hanging device, the gravity center position of the upper layer of the corrugated steel web plate hanging device is adjusted through the safe stay cable device, and particularly when the corrugated steel web plate is moved, the safety is improved.
Preferably, the safe stay cable device comprises a diagonal rod fixed on a corrugated steel web plate hoisting upper-layer longitudinal beam guide rail and a stay cable connecting the end part of the diagonal rod and the front end of the longitudinal beam guide rail, the lower end of the diagonal rod is fixed with the upper surface of the longitudinal beam guide rail, the upper end of the diagonal rod inclines towards one side of the rear end of the longitudinal beam guide rail, and the lower end of the diagonal rod is positioned in the middle of two upper-layer main cross beams. The utility model discloses a hang basket, including the longeron guide rail, the diagonal pole, the diagonal cable, the longeron guide rail is connected to the diagonal cable, and the diagonal cable is connected to the diagonal cable one end, and the longeron guide rail is connected to the one end, and the pulling force through the diagonal cable shifts the power of the longer one end of cantilever to longeron guide rail rear end direction like this, avoids the great side deflection increase of cantilever length, also changes the longeron guide rail and varies the arm to hanging the holistic focus influence of basket.
Preferably, the longitudinal beam guide rails are perpendicular to the upper-layer main cross beam, the upper surfaces of the longitudinal beam guide rails are attached to and fixed with the lower surface of the upper-layer main cross beam, and the upper surfaces of the longitudinal beam guide rails and two sides of the upper-layer main cross beam are fixedly reinforced through stiffening plates.
Preferably, longitudinal horizontal rods are connected between the two upper-layer main cross beams, the two longitudinal horizontal rods are fixed on the upper surfaces of the upper-layer main cross beams, transverse parallel truss sheets are connected between the two longitudinal beam guide rails, the two parallel truss sheets are fixed on the upper surfaces of the longitudinal beam guide rails, and the two parallel truss sheets are respectively positioned at the front and the rear of the two upper-layer main cross beams. The arrangement of the parallel truss sheets can improve the rigidity of the hanging basket in the transverse bridge direction.
Preferably, the upright posts are of I-shaped steel structures, web plates of I-shaped steel of the four upright posts are respectively positioned in two vertical planes, the surfaces, where the I-shaped steel of the two upright posts, facing to the rear side of the longitudinal beam guide rail are positioned, are vertical to the axial direction of the longitudinal beam guide rail, and the surfaces, where the I-shaped steel of the two upright posts, facing to the front side of the longitudinal beam guide rail are positioned, are parallel to the axial direction of the longitudinal beam guide rail; triangular stiffening plates are fixed at the upper end and the lower end of the I-shaped steel web plate. The webs of the four upright posts are respectively arranged along the transverse bridge direction and the forward bridge direction, so that the rigidity of the hanging basket in the transverse bridge direction and the forward bridge direction is ensured.
Preferably, the inclined struts are connected between the two vertical columns along the bridge direction, the two inclined struts on the same side are connected, and the two inclined struts are intersected to form the scissor strut. The arrangement of the cross braces can improve the rigidity of the hanging basket in the direction along the bridge.
Preferably, the two longitudinal beam guide rails are respectively provided with a slide rail trolley, the transverse beam slide rail is one, the transverse beam slide rails are fixed with the slide rail trolleys, the hoisting devices are two groups, and each group of hoisting devices comprises a lifting hoist and a lifting hook. The transverse beam slide rail is perpendicular to the longitudinal beam guide rail, the two slide rail trolleys are fixed to two ends of the transverse beam slide rail respectively, and the slide rail trolleys can move along the longitudinal beam guide rail to drive the transverse beam slide rail to integrally move along the longitudinal beam guide rail.
Preferably, the corrugated steel web plate is installed by an asynchronous hanging basket, a tower crane and a bridge deck slide rail trolley matched with the tower crane, the corrugated steel web plate is lifted from the underside of the bridge to the bridge deck slide rail trolley on the bridge deck by the tower crane, then the corrugated steel web plate is conveyed to the lower part of the rear side of a longitudinal beam guide rail of the asynchronous hanging basket by the bridge deck slide rail trolley, and then the corrugated steel web plate is hung to a required position by the asynchronous hanging basket to be installed and fixed. The bridge deck slide rail trolley is a trolley moving along slide rails on a bridge deck, and is matched with a bridge deck slide rail trolley for an asynchronous hanging basket, so that a corrugated steel web is vertically hung to the bridge deck from the lower part of a bridge by a tower crane and is placed on the bridge deck slide rail trolley, the bridge deck slide rail trolley moves along the bridge deck direction and moves to the rear end direction of the asynchronous hanging basket, then the corrugated steel web is lifted away from the bridge deck slide rail trolley by a lifting device, a transverse beam slide rail of a transverse beam slide rail moves to the front end from the rear end along a longitudinal beam guide rail, and the corrugated steel web is adjusted to the installation state at the front end position for installation.
Preferably, the asynchronous hanging basket lifts the corrugated steel web from the bridge deck slide rail trolley through the lifting device, moves the corrugated steel web to the front side of the longitudinal beam guide rail from the rear side of the longitudinal beam guide rail in a horizontal state, and controls the lifting device to convert the corrugated steel web into a vertical state and fall to a mounting position for mounting and fixing after the corrugated steel web is in place.
The invention has the beneficial effects that: 1. the corrugated steel web is hung on the bridge in a moving and installing mode through the asynchronous hanging basket, and the occupied time of the tower crane is shortened.
2. The lifting of the corrugated steel web to the bridge floor is completed by a tower crane, the moving and mounting hanging of the corrugated steel web on the bridge are completed by the butt joint of the asynchronous hanging baskets, and meanwhile, the mounting sequence of the corrugated steel web on the side of mileage of the same pier position is optimized for symmetrical parallel construction by sequential flow construction, so that the construction efficiency is improved.
3. The removal and the installation of wave form steel web on the bridge are hung by asynchronous string basket completion, and the tower crane only needs to hang wave form steel web to the bridge floor from vertical down to shorten the davit length of tower crane, it is little influenced by the topography, also can reduce the demand of tower crane hoist and mount ability, thereby reduce the lease cost of tower crane.
Drawings
FIG. 1 is a schematic diagram of one configuration of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 taken from direction A-A in accordance with the present invention;
FIG. 3 is a schematic view of the structure of FIG. 1 taken from direction B-B in accordance with the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a view of a corrugated steel web of the present invention in a lifted condition on a bridge deck;
FIG. 6 is a state diagram of the corrugated steel web lifted to the front end in a horizontal state according to the present invention;
FIG. 7 is a schematic diagram illustrating the state change of the corrugated steel web during the process of placing the corrugated steel web below the corrugated steel web;
FIG. 8 is a schematic diagram of a state that a corrugated steel web is hoisted in place according to the present invention;
in the figure: 1. the movable support comprises a lower movable support layer, 2, a corrugated steel web plate hoisting upper layer, 3, a rear upright post, 4, a longitudinal beam guide rail, 5, a parallel truss sheet, 6, a stiffening plate, 7, an upper main cross beam, 8, a longitudinal flat rod, 9, an inclined rod, 10, a stay cable, 11, a slide rail trolley, 12, a pull anchor head, 13, a transverse beam slide rail, 14, a hoisting device, 15, a front upright post, 16, an inclined strut, 17, a lower layer cross beam, 18, an upper support leg, 19, a lower support leg, 20, a lower layer longitudinal beam, 21, a support leg, 22, a corrugated steel web plate, 23 and a bridge deck slide rail trolley.
Detailed Description
The invention is further described by the following specific embodiments in conjunction with the accompanying drawings.
Example (b):
as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the asynchronous cradle for the corrugated steel web bridge comprises a movable support lower layer 1 and a corrugated steel web hoisting upper layer 2 which are fixed with each other, wherein the height of the movable support lower layer is defined as the minimum height required by construction of a corrugated steel web bridge top plate, and the height of the corrugated steel web hoisting upper layer is defined as the minimum height required by horizontal translation of the corrugated steel web.
Wherein, the movable support lower layer comprises four support legs 21 supported in the grooves of the steel plates with holes on the upper wing of the corrugated steel web, two lower-layer cross beams 17 transversely connecting the support legs and two parallel lower-layer longitudinal beams 20 longitudinally connecting the support legs. The upper hoisting layer of the corrugated steel web comprises four upright posts vertically and fixedly connected with the two lower-layer cross beams, two upper-layer main cross beams 7 transversely connected with the top ends of the upright posts, and two longitudinal beam guide rails 4 fixed with the upper-layer main cross beams. The lower part of the longitudinal beam guide rail is connected with a transverse moving device which can move along the axial direction of the longitudinal beam guide rail, and the transverse moving device comprises a transverse beam slide rail 13 and a hoisting device 14 which is arranged on the transverse beam slide rail and can move along the axial direction of the transverse beam slide rail. The minimum effective length of the transverse beam slide rail is greater than the maximum height of the corrugated steel web; the length of the longitudinal beam guide rail extending out of the front side and the rear side of the movable support lower layer is at least 1/2 greater than the length of the corrugated steel web. The longitudinal beam guide rail on the upper layer of the corrugated steel web plate is in unequal-arm design relative to the lower movable support layer, and the length of the longitudinal beam guide rail extending out of the front side of the lower movable support layer is larger than the length of the longitudinal beam guide rail extending out of the rear side of the lower movable support layer.
The support leg of the movable support lower layer is formed by vertically overlapping and fixing an upper support leg 18 and a lower support leg 19, wherein a tetrafluoro steel plate is fixed at the bottom of the lower support leg, a lower layer cross beam is fixed at the top of the upper support leg, and a lower layer longitudinal beam is connected to the side face of the upper support leg. The side surfaces of the two lower supporting legs positioned at the front side of the lower movable support layer are fixedly provided with hinged joints, the hinged joints face the two supporting legs positioned at the rear side of the lower movable support layer. After the asynchronous hanging basket is supported in the groove of the upper wing perforated steel plate of the corrugated steel web plate, a telescopic cylinder is connected between the hinged joint and the upper wing perforated steel plate, and the asynchronous hanging basket is controlled to move through the telescopic cylinder.
The upright posts are of I-shaped steel structures, webs of I-shaped steel of the four upright posts are respectively positioned in two vertical planes, the web planes of the I-shaped steel of the two upright posts facing to the rear side of the longitudinal beam guide rail are vertical to the axis direction of the longitudinal beam guide rail, and the web planes of the I-shaped steel of the two upright posts facing to the front side of the longitudinal beam guide rail are parallel to the axis direction of the longitudinal beam guide rail. The upper end and the lower end of the I-shaped steel web plate are both fixed with triangular stiffening plates 6. The two upright columns in the front transverse bridge direction are front upright columns 15, and the two upright columns in the rear transverse bridge direction are rear upright columns 3. The web plate of the I-steel of the rear upright post is positioned in the transverse bridge direction, and the web plate of the I-steel of the front upright post is positioned in the forward bridge direction. The span of the upright post in the transverse bridge direction is larger than the width of the supporting leg in the transverse bridge direction. The inclined struts 16 are connected between the two vertical columns along the bridge direction, the two inclined struts are arranged on the same side, and the two inclined struts are intersected to form a scissor strut.
The longitudinal beam guide rail is perpendicular to the upper-layer main cross beam, the upper surface of the longitudinal beam guide rail is attached and fixed to the lower surface of the upper-layer main cross beam, and the upper surface of the longitudinal beam guide rail and the two sides of the upper-layer main cross beam are fixedly reinforced through the stiffening plates. The two upper main cross beams are connected with longitudinal horizontal rods 8, the two longitudinal horizontal rods are fixed on the upper surfaces of the upper main cross beams, the two longitudinal beam guide rails are connected with transverse parallel truss sheets 5, the two parallel truss sheets are fixed on the upper surfaces of the longitudinal beam guide rails, and the two parallel truss sheets are respectively positioned at the front and the rear of the two upper main cross beams. Two longitudinal beam guide rails are respectively provided with a slide rail trolley 11, the transverse beam guide rails are one, the transverse beam guide rails are fixed with the slide rail trolley, the hoisting devices are two groups, and each group of hoisting devices comprises a lifting hoist and a lifting hook. Limiting plates are arranged at two ends of the longitudinal beam guide rail, so that the sliding rail trolley is prevented from sliding out of the front end and the rear end of the longitudinal beam guide rail. The lifting device can be in a fixed position or a sliding state on the transverse beam sliding rail, the position of the lifting device on the transverse beam sliding rail can be changed, and limiting plates are arranged at two ends of the transverse beam sliding rail.
The upper layer of the corrugated steel web plate hoisting is provided with a safe stay cable device. The safe stay cable device comprises an inclined rod 9 fixed on a corrugated steel web plate hoisting upper-layer longitudinal beam guide rail and a stay cable 10 connecting the end part of the inclined rod and the front end of the longitudinal beam guide rail, wherein the lower end of the inclined rod is fixed with the upper surface of the longitudinal beam guide rail, the upper end of the inclined rod inclines towards one side of the rear end of the longitudinal beam guide rail, and the lower end of the inclined rod is positioned in the middle of two upper-layer main cross beams.
Wave form steel web installation work is hung basket, tower crane and supporting bridge floor slide rail dolly 23 by asynchronous, specifically is:
the corrugated steel webs are firstly conveyed to the position below a bridge through the ground, are lifted to the bridge floor one by one from the position below the bridge through a tower crane and are loaded on a bridge floor slide rail trolley, and then are conveyed to the lower part of the rear side of a longitudinal beam guide rail of the asynchronous hanging basket through the bridge floor slide rail trolley. The transverse beam slide rails drive the hoisting devices to move to the rear side of the asynchronous hanging basket, and the two groups of hoisting devices hook the two sides of the corrugated steel web plate respectively through the lifting hooks to hoist the corrugated steel web plate from the bridge deck slide rail trolley, as shown in fig. 5.
The corrugated steel web is lifted from the bridge deck slide rail trolley and is in a horizontal state, and then the whole transverse beam slide rail moves forwards along the longitudinal beam guide rail through the slide rail trolley 11 and moves to the front end position of the longitudinal beam guide rail, as shown in fig. 6.
After the transverse beam slide rail moves in place, one group of hoisting devices puts the corrugated steel web downward, so that the corrugated steel web is gradually changed into a vertical shape, and the corrugated steel web is moved to the installation position through the position change of the hoisting devices on the transverse beam slide rail, as shown in fig. 7.
After the corrugated steel web is in place, the lifting device is synchronously lowered, and the corrugated steel web is lowered to the installation position and is installed and fixed, as shown in fig. 8.
The bridge can set up an asynchronous basket of hanging respectively in both ends to can carry out the installation of wave form steel web simultaneously, thereby improve the efficiency of construction, and accelerate the construction progress.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (9)
1. The asynchronous hanging basket for the corrugated steel web bridge is characterized by comprising a movable support lower layer (1) and a corrugated steel web hoisting upper layer (2) which are fixed with each other, wherein the height of the movable support lower layer is limited to be the minimum height required by construction of a corrugated steel web bridge top plate, and the height of the corrugated steel web hoisting upper layer is limited to be the minimum height required by horizontal translation of the corrugated steel web; the movable support lower layer comprises four support legs (21) supported in grooves of the steel plates with holes on the upper wings of the corrugated steel webs, two lower-layer cross beams (17) transversely connecting the support legs and two parallel lower-layer longitudinal beams (20) longitudinally connecting the support legs; the upper hoisting layer of the corrugated steel web comprises four upright posts vertically and fixedly connected with two lower-layer cross beams, two upper-layer main cross beams (7) transversely connected with the top ends of the upright posts, and two longitudinal beam guide rails (4) fixed with the upper-layer main cross beams; a transverse moving device which can move along the axial direction of the longitudinal beam guide rail is connected below the longitudinal beam guide rail, and the transverse moving device comprises a transverse beam slide rail (13) and a hoisting device (14) which is arranged on the transverse beam slide rail and can move along the axial direction of the transverse beam slide rail; the minimum effective length of the transverse beam slide rail is greater than the maximum height of the corrugated steel web; 1/2 that the length of the longitudinal beam guide rail extending to the front side and the rear side of the movable support lower layer is at least larger than the length of the corrugated steel web; two longeron guide rails respectively set up a slide rail dolly (11), and the horizontal roof beam slide rail is one, horizontal roof beam slide rail with the slide rail dolly fixed mutually, hoisting accessory is two sets of, each hoisting accessory of group all includes a hoist and lower block and lifting hook.
2. The asynchronous cradle of a corrugated steel web bridge of claim 1, wherein the longitudinal beam guide rails of the corrugated steel web hoisting upper layer are of unequal arm design relative to the mobile support lower layer, and the length of the longitudinal beam guide rails extending out of the front side of the mobile support lower layer is greater than the length of the longitudinal beam guide rails extending out of the rear side of the mobile support lower layer; the upper layer of the corrugated steel web plate hoisting is provided with a safe stay cable device.
3. The asynchronous cradle of a wave form steel web bridge of claim 2, characterized by, that safe stay cable device includes being fixed in wave form steel web hoist upper strata longeron guide rail on down tube (9) and connecting the stay cable (10) of the front end of down tube tip and longeron guide rail, the lower extreme of down tube is fixed with longeron guide rail upper surface mutually, the upper end of down tube inclines towards the rear end one side of longeron guide rail, the position of the lower extreme of down tube is in the position in the middle of two upper main crossbeams.
4. The asynchronous cradle of a wave form steel web bridge of claim 1, 2 or 3, characterized in that the longeron guide rails are perpendicular to the upper main beam, the upper surface of the longeron guide rails is attached and fixed with the lower surface of the upper main beam, and the upper surface of the longeron guide rails and the two sides of the upper main beam are fixed and reinforced by stiffening plates (6).
5. The asynchronous cradle of a wave form steel web bridge of claim 1, 2 or 3, characterized in that, the longitudinal tie bars (8) are connected between the two upper main beams, the tie bars are two and fixed on the upper surface of the upper main beam, the two longitudinal beam guide rails are connected with the transverse parallel truss sheets (5), the parallel truss sheets are two and fixed on the upper surface of the longitudinal beam guide rails, and the two parallel truss sheets are respectively arranged at the front and back positions of the two upper main beams.
6. The asynchronous cradle of a wave form steel web bridge of claim 1, 2 or 3, characterized in that the upright posts are of I-steel structure, the webs of the I-steel of the four upright posts are respectively located in two vertical planes, the faces of the I-steel of the two upright posts facing to the rear side of the longitudinal beam guide rail are perpendicular to the axial direction of the longitudinal beam guide rail, and the faces of the I-steel of the two upright posts facing to the front side of the longitudinal beam guide rail are parallel to the axial direction of the longitudinal beam guide rail; triangular stiffening plates are fixed at the upper end and the lower end of the I-shaped steel web plate.
7. The asynchronous cradle of a wave form steel web bridge of claim 6, characterized in that an inclined strut (16) is connected between two vertical columns along the bridge direction, two inclined struts are arranged on the same side, and the two inclined struts intersect to form a scissor strut.
8. The asynchronous hanging basket of the corrugated steel web bridge as claimed in claim 1, 2 or 3, wherein the corrugated steel web is installed and lifted from the bridge bottom to a bridge deck slide rail trolley (23) on the bridge deck by the asynchronous hanging basket, the tower crane and the bridge deck slide rail trolley, then conveyed to the lower part of the rear side of a longitudinal beam guide rail of the asynchronous hanging basket by the bridge deck slide rail trolley, and then hung to a required position by the asynchronous hanging basket for installation and fixation.
9. The asynchronous cradle of claim 8, wherein the asynchronous cradle is characterized in that the corrugated steel web is hoisted from a bridge deck slide rail trolley by a hoisting device, the corrugated steel web is moved from the rear side of a longitudinal beam guide rail to the front side of the longitudinal beam guide rail in a horizontal state, and after the corrugated steel web is in place, the hoisting device is controlled to convert the corrugated steel web into a vertical state and fall to a mounting position for mounting and fixing.
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| CN112482234B (en) * | 2020-12-04 | 2022-02-25 | 中铁七局集团有限公司 | Self-hanging type asynchronous hanging basket |
| CN113005909B (en) * | 2021-03-02 | 2022-05-03 | 浙江交工集团股份有限公司 | Construction method for modifying hoisting positioning device by corrugated steel web asynchronous cradle |
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