CN112342926B - Offshore bridge girder erection machine and construction method thereof - Google Patents
Offshore bridge girder erection machine and construction method thereof Download PDFInfo
- Publication number
- CN112342926B CN112342926B CN202011238238.XA CN202011238238A CN112342926B CN 112342926 B CN112342926 B CN 112342926B CN 202011238238 A CN202011238238 A CN 202011238238A CN 112342926 B CN112342926 B CN 112342926B
- Authority
- CN
- China
- Prior art keywords
- bridge girder
- girder erection
- erection machine
- construction
- leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention discloses an offshore bridge girder erection machine and a construction method thereof, and relates to the technical field of offshore platform construction. The construction method of the offshore bridge girder erection machine comprises a bridge girder erection machine assembling step, a bridge girder erection machine testing step, a bridge girder erection machine positioning step, a prefabricated part installing step and a bridge girder erection machine moving step, and the construction method of the offshore bridge girder erection machine is characterized in that a front supporting leg structure of the offshore bridge girder erection machine is improved on the basis of the bridge girder erection machine for roads and railways to adapt to different steel pipe pile intervals and load requirements, and meanwhile, a transition joint is arranged on the front supporting leg steel pipe pile of the offshore bridge girder erection machine, so that the offshore bridge girder erection machine has the function of adjusting front, back, left and right to adapt to the horizontal construction deviation of the steel pipe pile or the concrete pile at the lower part; the support leg structure in reforming transform makes it can adapt to the complicated characteristics of reinforcing bar on the pier cap of steel-pipe pile top, finally realizes changing the operation on water into construction on the road, reduces adverse factor influences such as surge, morning and evening tides for the construction progress improves installation quality simultaneously, reduces construction cost.
Description
Technical Field
The invention relates to the technical field of offshore construction, in particular to an offshore bridge girder erection machine and a construction method thereof.
Background
Offshore platforms are generally high-pile wharfs such as wharf platforms and ship lift platforms, and are generally located in deeper sea areas, and sea conditions are influenced by factors such as tides and sea winds more.
The substructure of high-pile wharf has underwater structures such as steel pipe piles and concrete piles, and the upper part is mostly a precast concrete beam plate structure. The installation of prefabricated elements on the top of a high-piled beam-slab wharf has long been dependent on large cranes and barges. The construction process for installing the prefabricated parts by using the traditional crane ship and barge is greatly influenced by factors such as surge, tide and the like, so that the construction process has short continuous operation time, slow construction progress and high construction cost.
Disclosure of Invention
The invention aims to reduce the influence of surge, tide and performance parameters of offshore hoisting equipment on the installation and construction of a prefabricated beam plate structure of an offshore platform, and the offshore bridge girder erection machine provided by the invention is used for reconstructing offshore operation bridge erection into common bridge erection and reducing the construction cost.
The offshore bridge girder erection machine is improved on the basis of bridge girder erection machines for roads and railways, the offshore bridge girder erection machine adapts to the space and load requirements of different steel pipe piles by transforming the front supporting leg structure, and meanwhile, the front supporting leg steel pipe pile is provided with a transition joint which has the function of adjusting front and back and left and right so as to adapt to the horizontal deviation of the steel pipe pile or the concrete pile at the lower part in the construction process on water; the middle supporting leg structure is improved, so that the middle supporting leg structure can adapt to the characteristic that reinforcing steel bars on a pier cap at the top of a steel pipe pile are complex, and finally, overwater operation is changed into road construction through an offshore bridge girder erection machine. The invention also cancels the dependence on large-scale offshore special construction equipment such as offshore crane ships, barges and the like, and the prefabricated parts of the bridge can be directly transported to the bridge girder erection machine from the land for installation operation, thereby creating a new way for the construction of offshore platforms.
A kind of offshore bridging machine, including girder, front leg, middle leg and back leg, the front leg of the said bridging machine is locked with the girder lower chord of the bridging machine through the stud, the horizontal running gear of the front leg is mounted on the inferior part of the front leg; the upright post of the front supporting leg is of an internal and external sleeving structure and is provided with a hydraulic jack for adjusting the height of the front supporting leg; the bottom of the track beam of the front support leg transverse walking mechanism is connected with a plurality of transition joints which are sleeved on the tops of the piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front support leg transverse walking mechanism is set according to the distance between the piles; the bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure; the upper part of a middle supporting leg of the bridge girder erection machine is locked with the lower chord of the main girder and is provided with a longitudinal movement driving mechanism; the middle supporting leg transverse walking mechanism is installed on the lower portion of the middle supporting leg, a plurality of supporting blocks are evenly distributed at the bottom of the transverse rail beam of the middle supporting leg transverse walking mechanism, and grooves for avoiding reserved steel bars of the beam slab are formed in the bottoms of the supporting blocks.
Furthermore, the track beam of the front supporting leg transverse walking mechanism is connected with the transition section through a flange; and the bolt holes used for connecting the transition sections on the track beam are waist-shaped holes.
The continuous truss structure comprises a first support rod, a second support rod, a third support rod and a connecting support platform; the upper ends of the first support rod piece, the second support rod piece and the third support rod piece are fixedly connected to the bottom of the track beam through connecting lug seats, and the lower ends of the first support rod piece, the second support rod piece and the third support rod piece are connected to the connecting support table; the first support rod piece, the third support rod piece and the track beam form an inverted triangle structure, and the second support rod piece is located in the center line of the inverted triangle structure.
The first support rod piece and the third support rod piece are both support rod pieces with adjustable lengths.
The first support rod piece and the third support rod piece are identical in structure and respectively comprise a first connecting seat, a double-headed screw, a second connecting seat and a third connecting seat, the upper end of the first connecting seat is connected with the connecting lug seat, the lower end of the first connecting seat is in threaded connection with the upper end of the double-headed screw, the lower end of the double-headed screw is connected with the upper end of the second connecting seat, the lower end of the second connecting seat is connected with the third connecting seat, and the lower end of the third connecting seat is connected with the connecting support table; and rotating the double-end screw to adjust the distance between the first connecting seat and the second connecting seat so as to adjust the lengths of the first supporting rod piece and the third supporting rod piece.
The invention also provides a construction method of the offshore bridge girder erection machine, and aims to reduce the influence of surge, tide and performance parameters of offshore hoisting equipment on the installation and construction of the prefabricated beam plate structure of the offshore platform, and reduce the construction cost by changing the offshore operation bridge erection into a construction method of common bridge erection.
The construction method of the offshore bridge girder erection machine is improved on the basis of bridge girder erection machines for highways and railways, the offshore bridge girder erection machine adapts to different steel pipe pile intervals and load requirements by transforming the front supporting leg structure, and meanwhile, the front supporting leg steel pipe pile is provided with a transition joint which has the function of adjusting front, back, left and right so as to adapt to the horizontal deviation of the steel pipe pile or the concrete pile at the lower part in the construction process on water; the middle supporting leg structure is improved, so that the middle supporting leg structure can adapt to the characteristic that reinforcing steel bars on a pier cap at the top of a steel pipe pile are complex, and finally, overwater operation is changed into road construction through an offshore bridge girder erection machine. The invention also cancels the dependence on large-scale offshore special construction equipment such as offshore crane ships, barges and the like, and the prefabricated parts of the bridge can be directly transported to the bridge girder erection machine from the land for installation operation, thereby creating a new way for the construction of offshore platforms.
A construction method of an offshore bridge girder erection machine comprises the following steps:
step A, assembling a bridge girder erection machine, namely assembling the bridge girder erection machine according to the mounting operation specification of the bridge girder erection machine; when the bridge girder erection machine is assembled, a front support leg of the bridge girder erection machine is locked with a lower chord of a main girder of the bridge girder erection machine through a stud, and a transverse travelling mechanism of the front support leg is arranged at the lower part of the front support leg; the upright posts of the front supporting legs are arranged into an inner and outer sleeving structure, and hydraulic jacks are arranged to adjust the height of the front supporting legs;
the bottom of a track beam of the front leg transverse traveling mechanism is connected with a plurality of transition joints which are sleeved on the tops of piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front leg transverse traveling mechanism is set according to the distance between the piles;
the bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure;
locking the upper part of a middle supporting leg of the bridge girder erection machine with the lower chord of the main girder, and installing a longitudinal movement driving mechanism; the lower part of a middle supporting leg of the bridge girder erection machine is provided with a middle supporting leg transverse walking mechanism, a plurality of supporting blocks are uniformly distributed at the bottom of a transverse track beam of the middle supporting leg transverse walking mechanism, and the bottoms of the supporting blocks are provided with slots for avoiding reserved steel bars of beam plates;
step B, a bridge girder erection machine test step, namely after the bridge girder erection machine is assembled, carrying out static load and dynamic load tests on the assembled bridge girder erection machine according to specifications by adopting equal-weight loading materials, measuring and recording the downwarping camber of a main beam of the bridge girder erection machine for testing, and formally putting the bridge girder erection machine into the work of hoisting prefabricated parts after all testing load test parameters meet the requirements;
c, a bridge girder erection machine positioning step, namely adjusting support points of a middle support leg and a rear support leg of the bridge girder erection machine on a concrete structure meeting the bearing strength at the top of the pile, wherein the middle support leg of the bridge girder erection machine is supported on the top of the heightened precast beam at the top of the pile; the rear support leg of the bridge girder erection machine is supported on the surface layer concrete surface; the front support leg of the bridge girder erection machine is supported on the pile;
d, mounting the prefabricated members, namely dividing a construction area into a plurality of operation surfaces according to different upper structures of piles after the bridge girder erection machine is in place, and hoisting the prefabricated members and constructing cast-in-place concrete on each operation surface by using a movable trolley on the upper part of a main beam of the bridge girder erection machine;
e, moving the bridge girder erection machine, namely moving the bridge girder erection machine to the next construction area for construction after the construction task of a construction area is completely finished and the concrete strength of the construction area meets the requirement; the bridge girder erection machine moving step is that the auxiliary support leg and the middle support leg of the bridge girder erection machine are moved forward to the next construction area, the middle support leg is supported on the concrete-heightened surface of the vertical and horizontal beams of the piles in the next construction area, and the auxiliary support leg and the middle support leg are descended and fixed; the front supporting leg and the rear supporting leg of the bridge girder erection machine are moved forwards, the front supporting leg is supported on a pile column of the next construction area, and the rear supporting leg is supported on a surface layer concrete surface of the next construction area; descending the front supporting leg and the rear supporting leg and fixing; the auxiliary supporting legs are emptied to finish the movement of the bridge girder erection machine;
and F, repeating the step D and the step E until the construction tasks of all construction areas of the offshore platform are completed, and disassembling the bridge girder erection machine to complete construction.
Furthermore, the track beam of the front supporting leg transverse walking mechanism is connected with the transition section through a flange; and the bolt holes used for connecting the transition sections on the track beam are waist-shaped holes.
The continuous truss structure comprises a first support rod, a second support rod, a third support rod and a connecting support platform; the upper ends of the first support rod piece, the second support rod piece and the third support rod piece are fixedly connected to the bottom of the track beam through connecting lug seats, and the lower ends of the first support rod piece, the second support rod piece and the third support rod piece are connected to the connecting support table; the first support rod piece, the third support rod piece and the track beam form an inverted triangle structure, and the second support rod piece is located in the center line of the inverted triangle structure.
The first support rod piece and the third support rod piece are both support rod pieces with adjustable lengths.
The first support rod piece and the third support rod piece are identical in structure and respectively comprise a first connecting seat, a double-headed screw, a second connecting seat and a third connecting seat, the upper end of the first connecting seat is connected with the connecting lug seat, the lower end of the first connecting seat is in threaded connection with the upper end of the double-headed screw, the lower end of the double-headed screw is connected with the upper end of the second connecting seat, the lower end of the second connecting seat is connected with the third connecting seat, and the lower end of the third connecting seat is connected with the connecting support table; and rotating the double-end screw to adjust the distance between the first connecting seat and the second connecting seat so as to adjust the lengths of the first supporting rod piece and the third supporting rod piece.
In the step D, dividing a construction area into at least four operation surfaces according to different upper structures of the piles; the pile cap installation, pile head reinforcement and concrete construction of the pile are first operation surfaces, the pile longitudinal and transverse beam installation, the pile top longitudinal and transverse beam cross joint reinforcement and concrete construction are second operation surfaces, the pile longitudinal and transverse beam concrete heightening is a third operation surface, and the prefabricated panel installation, the surface layer reinforcement, the template and the concrete construction are fourth operation surfaces. Except the construction operation surface, other areas are in the concrete structure and other strong stages.
Compared with the prior art, the beneficial technical effects brought by the invention are as follows:
1. the construction method of the offshore bridge girder erection machine is improved on the basis of bridge girder erection machines for highways and railways, the front supporting leg structure of the offshore bridge girder erection machine is transformed to adapt to different steel pipe pile spacing and load requirements, and meanwhile, the front supporting leg steel pipe pile is provided with a transition joint which has the function of adjusting front, back, left and right so as to adapt to the horizontal deviation of the steel pipe pile or the concrete pile at the lower part during construction on water; the middle supporting leg structure is transformed, so that the steel pipe pile can adapt to the characteristic that steel bars on a pier cap at the top of the steel pipe pile are complex, and finally, overwater operation is changed into road construction.
2. The invention is against the background of a certain actual project finger wharf construction condition, develops a series of researches on refitted bridge girder erection machines to form a set of complete high-pile wharf superstructure construction method, has certain theoretical significance and engineering guidance significance for improving the construction technical level of the high-pile wharf of the port, creates a new process for changing marine operation into land construction, and fills in domestic and foreign blanks.
3. The invention provides a construction method of an offshore platform by combining actual construction conditions on the premise of ensuring engineering quality and safety, changes overwater operation into onshore operation, reduces adverse factor influences such as surge and tide, accelerates construction progress, improves installation quality and reduces construction cost.
Drawings
FIG. 1 is a schematic view of a front support leg structure of a bridge girder erection machine in the construction method of the present invention.
FIG. 2 is a schematic view of the structure of the upper truss of the front support leg of the bridge girder erection machine in the construction method of the invention.
FIG. 3 is a schematic view of the connection structure between the front leg transition joint and the track beam of the bridge girder erection machine in the construction method of the present invention.
FIG. 4 is a structural diagram of the arrangement of support blocks of the middle leg track beams of the bridge girder erection machine in the construction method of the invention.
FIG. 5 is a schematic view of a bottom support block structure of a middle support leg of the bridge girder erection machine in the construction method of the present invention.
FIG. 6 is a schematic plan view of a bridge girder erection machine in the construction method of the present invention.
FIG. 7 is a schematic view of the working plane of the bridge girder erection machine in the construction method of the present invention.
Reference numerals: 1. front supporting legs, 2, double-end studs, 3, a main beam of a bridge erecting machine, 4, a transverse travelling mechanism of the front supporting legs, 5, an upright post, 6, a hydraulic jack, 7, a track beam, 8, a transition section, 9, a continuous truss structure, 10, a transverse travelling mechanism of the middle supporting legs, 11, a supporting block, 12, a slot, 13, a pile, 14, an auxiliary supporting leg, 15, a first supporting rod piece, 16, a second supporting rod piece, 17, a third supporting rod piece, 18, a connecting supporting table, 19, a first connecting seat, 20, the double-end screws, 21, a second connecting seat, 22, a third connecting seat, 23, a connecting lug seat, 24, a flange, 25, the middle supporting legs, 26, rear supporting legs, 27 and a moving trolley.
Detailed Description
The technical scheme of the invention is further elaborated in the following by combining the drawings in the specification.
Example 1
The invention takes the construction condition of a finger-type wharf of a certain actual project as the background, develops a series of researches on a modified bridge girder erection machine to form a set of complete construction method of the upper structure of the high-pile wharf, and adopts special equipment for construction by comprehensively considering survey of a construction site, the structural specification requirement of the high-loading wharf and the arrangement of construction progress. The embodiment mainly explains the design, assembly and load test requirements of special equipment, the process for hoisting and installing the concrete prefabricated member and the technical points of the moving and positioning construction.
The front support leg of the offshore bridge girder erection machine is supported on the top of the front pile column and is a front end supporting point during girder erection. In order to enable the front supporting leg to adapt to the horizontal deviation of the lower steel pipe pile or the concrete pile, the steel pipe pile of the front supporting leg is provided with a transition joint, so that the front supporting leg has the function of adjusting front, back, left and right. The concrete modification is as follows: the front supporting leg is locked with the lower chord of the main beam through a double-end stud, the transverse walking mechanism is installed at the lower part, the upright post is arranged into an inner and outer sleeve structure, and a hydraulic jack is arranged for adjusting the height of the supporting leg.
When the device is in the erection limit stride concrete prefabricated section, the load that the track roof beam side span bore is concentrated and great. During design, according to the maximum load borne by the side span of the track beam, an inverted triangular continuous truss structure is arranged at the lower part of the track beam. As shown in fig. 1.
Whether the steel pipe piles or the concrete piles are different according to the use requirements, the distance between the piles is also inconsistent. When the design is carried out, the steel pipe transition joint sleeved on the outer side of the pile column is connected with the track beam through bolts, so that different pile column intervals are met. As shown in fig. 2.
The selection of the diameter of the steel pipe transition section needs to consider the allowable deviation of the construction of the steel pipe column or the concrete pile, namely the diameter of the steel pipe transition section is the diameter of the pile column plus the deviation of the construction sequence of the pile column. When the equipment moves to the next span, the front supporting legs can be accurately aligned with the pile. As shown in fig. 3.
The middle supporting leg is supported on the top of the heightened precast beam at the top of the pile column and is a middle supporting point. And also is the driving leg of the equipment. The middle leg is considered as a whole when designing. Therefore, the upper part of the middle supporting leg is locked with the lower chord of the main beam, and a longitudinal movement driving mechanism is installed; the lower parts of the supporting legs are provided with the transverse traveling mechanism and the transverse moving track beam, so that the equipment can move left and right.
General port engineering offshore platform (high-pile wharf, ship lift platform, etc.) structure: the lower part is a beam-slab prefabricated structure, and the upper part is surface layer cast-in-place concrete. A plurality of reserved steel bars are connected with the surface layer steel bars on the beam slab, so that the damage of the middle support leg transverse rail beam to the reserved steel bars is avoided or reduced. When in design, the problem of damage to reserved steel bars of the beam slab is solved by adjusting the bottom area of the supporting block, arranging the spacing, slotting the bottom of the cushion block and the like under the condition of meeting the supporting condition. As shown in fig. 4 and 5.
Assembling according to the installation and operation specifications of the bridge girder erection machine, after assembling, carrying out static load and dynamic load tests on the device by using loading materials (prefabricated members or sandbags) with equal weight (1.25 times and 1.1 times of rated load lifting capacity of the bridge girder erection machine) according to the specifications, measuring and recording the downwarp camber of a main girder for inspection, and formally putting the prefabricated members into normal work after all inspection load test parameters are checked to meet the specification requirements.
After the prefabricated members in one area are installed and poured, the device needs to move the front, middle and rear supporting legs to the next area so as to install the prefabricated members in the rear area and pour concrete, and the moving steps are as follows: adjusting the working state of the equipment to be good and preparing to move to the next span; forward moving the auxiliary leg, center leg to a predetermined B, C position; moving the front and rear legs and the main beam forward to a predetermined A, D position; and finally, landing the front and rear support legs, reinforcing and stabilizing, and completing the movement and positioning of the device. And (5) the auxiliary supporting legs are emptied, and the trolley above the main beam is moved to prepare for lifting the beam. As shown in fig. 6.
The auxiliary supporting legs are emptied, and after the device is put in place, one area is roughly divided into 3 to 4 working faces according to different upper structures of the pile. And hoisting the prefabricated member and constructing concrete on each working face by using the movable trolley on the upper part of the main beam.
Installing a pile cap of the 11# pile, binding a pile head reinforcing steel bar and constructing concrete, namely a working surface; installing a longitudinal beam and a transverse beam of the No. 9-10 pile, binding cross joint steel bars of a longitudinal beam and a transverse beam of the No. 9 pile top, and constructing concrete, namely a working surface; heightening concrete of the No. 7-8 piles by using longitudinal and transverse beams, namely a working surface; mounting a 4# -5# pile prefabricated panel, constructing surface layer steel bars, a template and concrete, namely a working surface. The pile number 1-2 is a prefabricated part transport vehicle parking area or a prefabricated part temporary stacking area. Except the construction operation surface, other areas are in the concrete structure and other strong stages. As shown in fig. 7.
In order to transmit the load of the whole device and the construction dynamic load to the pile with larger bearing capacity, the supporting points of the middle supporting leg and the rear supporting leg are adjusted on the concrete structure which meets the bearing strength at the top of the pile. Therefore, the content and duration of the working face of each device spanning into one area are consistent, and the whole area construction task needs to be completed completely, so that the next area can be accessed.
The construction of the prefabricated plate beam at the upper part of the conventional high-pile wharf adopts the installation of a large floating pontoon matched with a crane ship: the scheme can be used for expanding the construction of a plurality of working surfaces; however, the construction process for installing the prefabricated parts on the traditional crane ship is greatly influenced by factors such as surge and wind conditions, so that the operation time is short, the construction progress is slow, and the construction cost is high. The embodiment relates to a method for installing an upper structure of a shore wharf and a port engineering offshore platform (a high-pile wharf, a ship lift platform and the like) and constructing concrete, and the method can be applied to the construction of the upper structure of other similar high-pile wharfs.
When the conventional railway and highway bridge girder erection machine is constructed, the front support leg transverse moving rail is directly located at the top of the cover beam, the top of the cover beam is a plane, and the stress of the bridge girder erection machine transverse moving rail is uniform. In order to solve the problem that the load borne by the transverse moving track between the side span prefabricated member and the piles is uneven, triangular continuous trusses are arranged on the lower portions of the track beams, and the rigidity of the transverse moving track beams is improved. The front support leg steel pipe transition joint is connected with the support leg transverse moving track beam through a flange, and the pile spacing can be adapted. Such as 5m, 6m, 7.4m post spacing.
Example 2
As a preferred embodiment of the invention, referring to the accompanying drawings of the specification 1-7, the embodiment discloses an offshore bridge girder erection machine, which comprises a main girder, a front support leg, a middle support leg and a rear support leg; the front supporting leg of the bridge girder erection machine is locked with the lower chord of the main girder of the bridge girder erection machine through the stud, and the transverse walking mechanism of the front supporting leg is arranged at the lower part of the front supporting leg; the upright post of the front supporting leg is of an internal and external sleeving structure and is provided with a hydraulic jack for adjusting the height of the front supporting leg; the bottom of the track beam of the front support leg transverse walking mechanism is connected with a plurality of transition joints which are sleeved on the tops of the piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front support leg transverse walking mechanism is set according to the distance between the piles; the bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure; the upper part of a middle supporting leg of the bridge girder erection machine is locked with the lower chord of the main girder and is provided with a longitudinal movement driving mechanism; the middle supporting leg transverse walking mechanism is installed on the lower portion of the middle supporting leg, a plurality of supporting blocks are evenly distributed at the bottom of the transverse rail beam of the middle supporting leg transverse walking mechanism, and grooves for avoiding reserved steel bars of the beam slab are formed in the bottoms of the supporting blocks.
Furthermore, the track beam of the front supporting leg transverse walking mechanism is connected with the transition section through a flange; and the bolt holes used for connecting the transition sections on the track beam are waist-shaped holes.
The continuous truss structure comprises a first support rod, a second support rod, a third support rod and a connecting support platform; the upper ends of the first support rod piece, the second support rod piece and the third support rod piece are fixedly connected to the bottom of the track beam through connecting lug seats, and the lower ends of the first support rod piece, the second support rod piece and the third support rod piece are connected to the connecting support table; the first support rod piece, the third support rod piece and the track beam form an inverted triangle structure, and the second support rod piece is located in the center line of the inverted triangle structure.
The first support rod piece and the third support rod piece are both support rod pieces with adjustable lengths.
The first support rod piece and the third support rod piece are identical in structure and respectively comprise a first connecting seat, a double-headed screw, a second connecting seat and a third connecting seat, the upper end of the first connecting seat is connected with the connecting lug seat, the lower end of the first connecting seat is in threaded connection with the upper end of the double-headed screw, the lower end of the double-headed screw is connected with the upper end of the second connecting seat, the lower end of the second connecting seat is connected with the third connecting seat, and the lower end of the third connecting seat is connected with the connecting support table; and rotating the double-end screw to adjust the distance between the first connecting seat and the second connecting seat so as to adjust the lengths of the first supporting rod piece and the third supporting rod piece.
Example 3
Referring to fig. 1-7 of the specification, this embodiment discloses as another preferred embodiment of the present invention:
a construction method of an offshore bridge girder erection machine is characterized by comprising the following steps:
step A, assembling a bridge girder erection machine, namely assembling the bridge girder erection machine according to the mounting operation specification of the bridge girder erection machine; when the bridge girder erection machine is assembled, a front support leg of the bridge girder erection machine is locked with a lower chord of a main girder of the bridge girder erection machine through a stud, and a transverse travelling mechanism of the front support leg is arranged at the lower part of the front support leg; the upright posts of the front supporting legs are arranged into an inner and outer sleeving structure, and hydraulic jacks are arranged to adjust the height of the front supporting legs;
the bottom of a track beam of the front leg transverse traveling mechanism is connected with a plurality of transition joints which are sleeved on the tops of piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front leg transverse traveling mechanism is set according to the distance between the piles;
the bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure;
locking the upper part of a middle supporting leg of the bridge girder erection machine with the lower chord of the main girder, and installing a longitudinal movement driving mechanism; the lower part of a middle supporting leg of the bridge girder erection machine is provided with a middle supporting leg transverse walking mechanism, a plurality of supporting blocks are uniformly distributed at the bottom of a transverse track beam of the middle supporting leg transverse walking mechanism, and the bottoms of the supporting blocks are provided with slots for avoiding reserved steel bars of beam plates;
step B, a bridge girder erection machine test step, namely after the bridge girder erection machine is assembled, carrying out static load and dynamic load tests on the assembled bridge girder erection machine according to specifications by adopting equal-weight loading materials, measuring and recording the downwarping camber of a main beam of the bridge girder erection machine for testing, and formally putting the bridge girder erection machine into the work of hoisting prefabricated parts after all testing load test parameters meet the requirements;
c, a bridge girder erection machine positioning step, namely adjusting support points of a middle support leg and a rear support leg of the bridge girder erection machine on a concrete structure meeting the bearing strength at the top of the pile, wherein the middle support leg of the bridge girder erection machine is supported on the top of the heightened precast beam at the top of the pile; the rear support leg of the bridge girder erection machine is supported on the surface layer concrete surface; the front support leg of the bridge girder erection machine is supported on the pile;
d, mounting the prefabricated members, namely dividing a construction area into a plurality of operation surfaces according to different upper structures of piles after the bridge girder erection machine is in place, and hoisting the prefabricated members and constructing concrete on each operation surface by using a movable trolley on the upper part of a main beam of the bridge girder erection machine;
e, moving the bridge girder erection machine, namely moving the bridge girder erection machine to the next construction area for construction after the construction task of a construction area is completely finished and the concrete strength of the construction area meets the requirement; the bridge girder erection machine moving step is that the auxiliary support leg and the middle support leg of the bridge girder erection machine are moved forward to the next construction area, the middle support leg is supported on the concrete-heightened surface of the vertical and horizontal beams of the piles in the next construction area, and the auxiliary support leg and the middle support leg are descended and fixed; the front supporting leg and the rear supporting leg of the bridge girder erection machine are moved forwards, the front supporting leg is supported on a pile column of the next construction area, and the rear supporting leg is supported on a surface layer concrete surface of the next construction area; descending the front supporting leg and the rear supporting leg and fixing; the auxiliary supporting legs are emptied to finish the movement of the bridge girder erection machine;
and F, repeating the step D and the step E until the construction tasks of all construction areas of the offshore platform are completed, and disassembling the bridge girder erection machine to complete construction.
Example 4
Referring to fig. 1-7 of the specification, this embodiment discloses as another preferred embodiment of the present invention:
a construction method of an offshore bridge girder erection machine is characterized by comprising the following steps:
step A, assembling a bridge girder erection machine, namely assembling the bridge girder erection machine according to the mounting operation specification of the bridge girder erection machine; when the bridge girder erection machine is assembled, a front support leg of the bridge girder erection machine is locked with a lower chord of a main girder of the bridge girder erection machine through a stud, and a transverse travelling mechanism of the front support leg is arranged at the lower part of the front support leg; the upright posts of the front supporting legs are arranged into an inner and outer sleeving structure, and hydraulic jacks are arranged to adjust the height of the front supporting legs;
the bottom of a track beam of the front leg transverse traveling mechanism is connected with a plurality of transition joints which are sleeved on the tops of piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front leg transverse traveling mechanism is set according to the distance between the piles;
the track beam of the front support leg transverse walking mechanism is connected with the transition joint through a flange; and the bolt holes used for connecting the transition sections on the track beam are waist-shaped holes. The steel pipe transition joints are finely adjusted to meet construction allowable deviation of different piles, fine adjustment can be performed on a single steel pipe transition joint, namely bolt holes in the support leg track beam are arranged into long round holes, and supporting rods between the steel pipe transition joints are adjustable supporting rods to meet construction allowable deviation of different piles.
The bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure; the continuous truss structure comprises a first support rod, a second support rod, a third support rod and a connecting support platform; the upper ends of the first support rod piece, the second support rod piece and the third support rod piece are fixedly connected to the bottom of the track beam through connecting lug seats, and the lower ends of the first support rod piece, the second support rod piece and the third support rod piece are connected to the connecting support table; the first support rod piece, the third support rod piece and the track beam form an inverted triangle structure, and the second support rod piece is located in the center line of the inverted triangle structure.
The first support rod piece and the third support rod piece are both support rod pieces with adjustable lengths.
The first support rod piece and the third support rod piece are identical in structure and respectively comprise a first connecting seat, a double-headed screw, a second connecting seat and a third connecting seat, the upper end of the first connecting seat is connected with the connecting lug seat, the lower end of the first connecting seat is in threaded connection with the upper end of the double-headed screw, the lower end of the double-headed screw is connected with the upper end of the second connecting seat, the lower end of the second connecting seat is connected with the third connecting seat, and the lower end of the third connecting seat is connected with the connecting support table; and rotating the double-end screw to adjust the distance between the first connecting seat and the second connecting seat so as to adjust the lengths of the first supporting rod piece and the third supporting rod piece. And the stay bars between the steel pipe transition joints are adjustable stay bars, so that construction allowable deviation of different piles is met.
Locking the upper part of a middle supporting leg of the bridge girder erection machine with the lower chord of the main girder, and installing a longitudinal movement driving mechanism; the lower part of a middle supporting leg of the bridge girder erection machine is provided with a middle supporting leg transverse walking mechanism, a plurality of supporting blocks are uniformly distributed at the bottom of a transverse track beam of the middle supporting leg transverse walking mechanism, and the bottoms of the supporting blocks are provided with slots for avoiding reserved steel bars of beam plates; the conventional track beam supporting block is a strip-shaped square timber, a regular concrete block and the like. This application mainly solves beam slab reserved steel bar destruction problem through modes such as adjustment supporting shoe bottom area, arrangement interval, cushion bottom fluting.
And step B, a bridge girder erection machine test step, after the bridge girder erection machine is assembled, carrying out static load and dynamic load tests on the assembled bridge girder erection machine according to the standard by adopting equal-weight loading materials, measuring and recording the downwarping camber of a main beam of the bridge girder erection machine for testing, and formally putting the bridge girder erection machine into the work of hoisting the prefabricated member after all testing load test parameters meet the requirements.
C, a bridge girder erection machine positioning step, namely adjusting support points of a middle support leg and a rear support leg of the bridge girder erection machine on a concrete structure meeting the bearing strength at the top of the pile, wherein the middle support leg of the bridge girder erection machine is supported on the top of the heightened precast beam at the top of the pile; the rear support leg of the bridge girder erection machine is supported on the surface layer concrete surface; the front support leg of the bridge girder erection machine is supported on the pile.
D, mounting the prefabricated members, namely dividing a construction area into a plurality of operation surfaces according to different upper structures of piles after the bridge girder erection machine is in place, and hoisting the prefabricated members and constructing concrete on each operation surface by using a movable trolley on the upper part of a main beam of the bridge girder erection machine; in the step D, dividing a construction area into at least four operation surfaces according to different upper structures of the piles; the pile cap installation, pile head reinforcement and concrete construction of the pile are first operation surfaces, the pile longitudinal and transverse beam installation, the pile top longitudinal and transverse beam cross joint reinforcement and concrete construction are second operation surfaces, the pile longitudinal and transverse beam concrete heightening is a third operation surface, and the prefabricated panel installation, the surface layer reinforcement, the template and the concrete construction are fourth operation surfaces. Except the construction operation surface, other areas are in the concrete structure and other strong stages.
E, moving the bridge girder erection machine, namely moving the bridge girder erection machine to the next construction area for construction after the construction task of a construction area is completely finished and the concrete strength of the construction area meets the requirement; the bridge girder erection machine moving step is that the auxiliary support leg and the middle support leg of the bridge girder erection machine are moved forward to the next construction area, the middle support leg is supported on the concrete-heightened surface of the vertical and horizontal beams of the piles in the next construction area, and the auxiliary support leg and the middle support leg are descended and fixed; the front supporting leg and the rear supporting leg of the bridge girder erection machine are moved forwards, the front supporting leg is supported on a pile column of the next construction area, and the rear supporting leg is supported on a surface layer concrete surface of the next construction area; descending the front supporting leg and the rear supporting leg and fixing; and (5) the auxiliary supporting legs are emptied to finish the movement of the bridge girder erection machine.
And F, repeating the step D and the step E until the construction tasks of all construction areas of the offshore platform are completed, and disassembling the bridge girder erection machine to complete construction.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the scope of the present invention.
Claims (6)
1. A construction method of an offshore bridge girder erection machine is characterized by comprising the following steps:
step A, assembling a bridge girder erection machine, namely assembling the bridge girder erection machine according to the mounting operation specification of the bridge girder erection machine; when the bridge girder erection machine is assembled, a front support leg of the bridge girder erection machine is locked with a lower chord of a main girder of the bridge girder erection machine through a stud, and a transverse travelling mechanism of the front support leg is arranged at the lower part of the front support leg; the upright posts of the front supporting legs are arranged into an inner and outer sleeving structure, and hydraulic jacks are arranged to adjust the height of the front supporting legs;
the bottom of a track beam of the front leg transverse traveling mechanism is connected with a plurality of transition joints which are sleeved on the tops of piles through bolts, and the distance between the transition joints at the bottom of the track beam of the front leg transverse traveling mechanism is set according to the distance between the piles;
the bottom of the track beam between the adjacent transition sections is provided with an inverted triangular continuous truss structure;
locking the upper part of a middle supporting leg of the bridge girder erection machine with the lower chord of the main girder, and installing a longitudinal movement driving mechanism; the lower part of a middle supporting leg of the bridge girder erection machine is provided with a middle supporting leg transverse walking mechanism, a plurality of supporting blocks are uniformly distributed at the bottom of a transverse track beam of the middle supporting leg transverse walking mechanism, and the bottoms of the supporting blocks are provided with slots for avoiding reserved steel bars of beam plates;
step B, a bridge girder erection machine test step, namely after the bridge girder erection machine is assembled, carrying out static load and dynamic load tests on the assembled bridge girder erection machine according to specifications by adopting equal-weight loading materials, measuring and recording the downwarping camber of a main beam of the bridge girder erection machine for testing, and formally putting the bridge girder erection machine into the work of hoisting prefabricated parts after all testing load test parameters meet the requirements;
c, a bridge girder erection machine positioning step, namely adjusting support points of a middle support leg and a rear support leg of the bridge girder erection machine on a concrete structure meeting the bearing strength at the top of the pile, wherein the middle support leg of the bridge girder erection machine is supported on the top of the heightened precast beam at the top of the pile; the rear support leg of the bridge girder erection machine is supported on the surface layer concrete surface; the front support leg of the bridge girder erection machine is supported on the pile;
d, mounting the prefabricated members, namely dividing a construction area into a plurality of operation surfaces according to different upper structures of piles after the bridge girder erection machine is in place, and hoisting the prefabricated members and constructing concrete on each operation surface by using a movable trolley on the upper part of a main beam of the bridge girder erection machine;
e, moving the bridge girder erection machine, namely moving the bridge girder erection machine to the next construction area for construction after the construction task of a construction area is completely finished and the concrete strength of the construction area meets the requirement; the bridge girder erection machine moving step is that the auxiliary support leg and the middle support leg of the bridge girder erection machine are moved forward to the next construction area, the middle support leg is supported on the concrete-heightened surface of the vertical and horizontal beams of the piles in the next construction area, and the auxiliary support leg and the middle support leg are descended and fixed; the front supporting leg and the rear supporting leg of the bridge girder erection machine are moved forwards, the front supporting leg is supported on a pile column of the next construction area, and the rear supporting leg is supported on a surface layer concrete surface of the next construction area; descending the front supporting leg and the rear supporting leg and fixing; the auxiliary supporting legs are emptied to finish the movement of the bridge girder erection machine;
and F, repeating the step D and the step E until the construction tasks of all construction areas of the offshore platform are completed, and disassembling the bridge girder erection machine to complete construction.
2. A construction method of an offshore bridge girder erection machine according to claim 1, wherein: the track beam of the front support leg transverse walking mechanism is connected with the transition joint through a flange; and the bolt holes used for connecting the transition sections on the track beam are waist-shaped holes.
3. A construction method of an offshore bridge girder erection machine according to claim 1, wherein: the continuous truss structure comprises a first support rod, a second support rod, a third support rod and a connecting support platform; the upper ends of the first support rod piece, the second support rod piece and the third support rod piece are fixedly connected to the bottom of the track beam through connecting lug seats, and the lower ends of the first support rod piece, the second support rod piece and the third support rod piece are connected to the connecting support table; the first support rod piece, the third support rod piece and the track beam form an inverted triangle structure, and the second support rod piece is located in the center line of the inverted triangle structure.
4. A construction method of an offshore bridge girder erection machine according to claim 3, wherein: the first support rod piece and the third support rod piece are both support rod pieces with adjustable lengths.
5. A construction method of an offshore bridge girder erection machine according to claim 4, wherein: the first support rod piece and the third support rod piece are identical in structure and respectively comprise a first connecting seat, a double-headed screw, a second connecting seat and a third connecting seat, the upper end of the first connecting seat is connected with the connecting lug seat, the lower end of the first connecting seat is in threaded connection with the upper end of the double-headed screw, the lower end of the double-headed screw is connected with the upper end of the second connecting seat, the lower end of the second connecting seat is connected with the third connecting seat, and the lower end of the third connecting seat is connected with the connecting support table; and rotating the double-end screw to adjust the distance between the first connecting seat and the second connecting seat so as to adjust the lengths of the first supporting rod piece and the third supporting rod piece.
6. A construction method of an offshore bridge girder erection machine according to claim 1, wherein: in the step D, dividing a construction area into at least four operation surfaces according to different upper structures of the piles; the pile cap installation, pile head reinforcement and concrete construction of the pile are first operation surfaces, the pile longitudinal and transverse beam installation, the pile top longitudinal and transverse beam cross joint reinforcement and concrete construction are second operation surfaces, the pile longitudinal and transverse beam concrete heightening is a third operation surface, and the prefabricated panel installation, the surface layer reinforcement, the template and the concrete construction are fourth operation surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238238.XA CN112342926B (en) | 2020-11-09 | 2020-11-09 | Offshore bridge girder erection machine and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011238238.XA CN112342926B (en) | 2020-11-09 | 2020-11-09 | Offshore bridge girder erection machine and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112342926A CN112342926A (en) | 2021-02-09 |
| CN112342926B true CN112342926B (en) | 2022-04-01 |
Family
ID=74428620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011238238.XA Active CN112342926B (en) | 2020-11-09 | 2020-11-09 | Offshore bridge girder erection machine and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112342926B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114933247B (en) * | 2022-04-12 | 2023-10-03 | 中国海洋大学 | Intelligent construction equipment and construction process thereof |
| CN116289745A (en) * | 2023-02-23 | 2023-06-23 | 中交二航局第一工程有限公司 | inverted-V-shaped beam installation device of sewer slide and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060099190A (en) * | 2005-03-10 | 2006-09-19 | 주식회사 대왕 이엔씨 | Bridge-building method and construct |
| CN101736696A (en) * | 2009-12-10 | 2010-06-16 | 郑州大方桥梁机械有限公司 | Highway-railway dual-purpose box-shaped double-beam T-shaped beam bridge girder erection machine |
| CN102587646A (en) * | 2012-02-14 | 2012-07-18 | 泰博混凝土模板与支撑（陕西）有限公司 | Hydraulic lifting self-ascending template system of intelligent independent unit structure |
| KR101614253B1 (en) * | 2015-07-17 | 2016-04-20 | 비앤씨컨설턴트(주) | Cantilever construction method of temporary bridge |
| CN106168011A (en) * | 2016-04-06 | 2016-11-30 | 北京地圣科创建设工程有限公司 | A kind of Steel Bridge superstructure and utilize the Steel Bridge construction method of this structure |
| CN110685214A (en) * | 2018-07-05 | 2020-01-14 | 中交第二航务工程局有限公司 | Pile-column integrated bridge substructure, construction device and method |
-
2020
- 2020-11-09 CN CN202011238238.XA patent/CN112342926B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060099190A (en) * | 2005-03-10 | 2006-09-19 | 주식회사 대왕 이엔씨 | Bridge-building method and construct |
| CN101736696A (en) * | 2009-12-10 | 2010-06-16 | 郑州大方桥梁机械有限公司 | Highway-railway dual-purpose box-shaped double-beam T-shaped beam bridge girder erection machine |
| CN102587646A (en) * | 2012-02-14 | 2012-07-18 | 泰博混凝土模板与支撑（陕西）有限公司 | Hydraulic lifting self-ascending template system of intelligent independent unit structure |
| KR101614253B1 (en) * | 2015-07-17 | 2016-04-20 | 비앤씨컨설턴트(주) | Cantilever construction method of temporary bridge |
| CN106168011A (en) * | 2016-04-06 | 2016-11-30 | 北京地圣科创建设工程有限公司 | A kind of Steel Bridge superstructure and utilize the Steel Bridge construction method of this structure |
| CN110685214A (en) * | 2018-07-05 | 2020-01-14 | 中交第二航务工程局有限公司 | Pile-column integrated bridge substructure, construction device and method |
Non-Patent Citations (1)
| Title |
|---|
| 双导梁架桥机架设预应力混凝土T梁方案分析;邹桃花;《企业导报》;20120330(第06期);第288页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112342926A (en) | 2021-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110820573B (en) | Construction method of steel-concrete composite beam of high-pier long-span bridge in mountainous area | |
| CN112342926B (en) | Offshore bridge girder erection machine and construction method thereof | |
| CN110847062A (en) | Construction method for whole-hole assembly double-width erection in 80-meter-span wide steel box girder factory | |
| CN110306435B (en) | Multi-ship combined transportation construction method for super-large segmented steel structure bridge | |
| KR101026014B1 (en) | Bridge deck construction method by means of pulling jack on the water | |
| CN111139749A (en) | Large-span bearing type continuous steel truss girder cantilever erection construction method | |
| CN112144413B (en) | Whole-span in-situ splicing and erecting method for steel-concrete composite beam in mountainous area | |
| CN108999427B (en) | Support structure for moving load during building migration in place and construction method thereof | |
| CN111851307A (en) | Large-span prefabricated assembly type corrugated web combined box girder transportation frame construction method | |
| CN115748513A (en) | Construction method of ultra-small high-span-ratio all-welded steel truss girder bridge based on cantilever aerial work platform | |
| CN215629392U (en) | Wide equipment is pieced together to prefabricated case roof beam | |
| CN115748413A (en) | Continuous steel truss web-plate truss double-layer combined swivel bridge structure | |
| CN213507989U (en) | Deepwater steel trestle capable of being constructed quickly | |
| CN209906223U (en) | Beam gantry crane | |
| CN219671101U (en) | Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius | |
| CN215629403U (en) | Supporting system for temporary via hole of bridge girder erection machine | |
| CN218643166U (en) | Assembled steel structure trestle bridge for soft soil foundation pit engineering construction | |
| CN216640288U (en) | Tower-passing sliding platform for steel box girder of cable-stayed bridge | |
| CN110725208A (en) | Construction method for erecting pier top superposed beam without support | |
| JPH10147912A (en) | Method for removing and erecting bridge | |
| CN217536681U (en) | Assembling support of large-tonnage steel-concrete combined cross beam of cable-stayed bridge cable tower | |
| CN111764291B (en) | Construction method of separated railway bridge steel-concrete transition section structure | |
| CN111485498B (en) | Installation process of prefabricated part of approach bridge broken line segment | |
| CN115404786B (en) | Pushing construction method for steel-concrete composite beam | |
| CN219690284U (en) | Steel tube concrete rigid frame bridge for high-speed railway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |