CN117488705A - Accurate pushing construction method for cross-existing high-speed curved steel box girder - Google Patents
Accurate pushing construction method for cross-existing high-speed curved steel box girder Download PDFInfo
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- CN117488705A CN117488705A CN202311427066.4A CN202311427066A CN117488705A CN 117488705 A CN117488705 A CN 117488705A CN 202311427066 A CN202311427066 A CN 202311427066A CN 117488705 A CN117488705 A CN 117488705A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 183
- 239000010959 steel Substances 0.000 title claims abstract description 183
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application discloses a construction method for accurately pushing a cross-existing high-speed curved steel box girder, which comprises the steps of firstly constructing a temporary buttress along a designed pushing line, and installing a pushing device on the temporary buttress; hoisting the curved steel box girder to the temporary buttress; hoisting the front guide beam to the front of the pushing direction of the curved steel box beam, and connecting the front guide beam with the curved steel box beam; hoisting the tail beam to the rear of the pushing direction of the curved steel box beam, and connecting the tail beam with the curved steel box beam; pushing the curved steel box girder to advance by a pushing device until the front end of the curved steel box girder spans the existing high speed to a preset position; installing a slideway on the temporary buttress, installing a traction device on the offset side of the curved steel box girder, and connecting the traction device with the curved steel box girder; starting a traction device, and dragging the curved steel box girder to slide to a designed position along a slideway; and removing the temporary buttress, the slideway, the traction device and the pushing device. The application has the effect of improving the existing high-speed efficiency of construction of bent steel box girder strides across and falls the position precision.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a precise pushing construction method for a curved steel box girder crossing the existing high speed.
Background
When the bridge is constructed above the existing high speed, in order to reduce the influence on the existing high speed, the construction period is shortened, the risk and the management difficulty are reduced, and the existing high speed is spanned by adopting a steel box girder. In the related art, a pushing construction method is adopted for the steel box girder to span the existing high speed, the method comprises the steps of firstly erecting auxiliary brackets such as an assembly bracket and a temporary buttress, then hoisting a steel box girder splicing member and a guide girder member to the auxiliary brackets by using a large-sized automobile crane to splice, carrying out walking type pushing construction after the steel box girder splicing is completed, and pushing the steel box girder to a designed position. However, when the pushing construction method is used for pushing construction of the curved steel box girder, the curved steel box girder is easy to deviate, the pushing error is large, the angle of the curved steel box girder needs to be corrected continuously and accurately in the pushing process, the operation is troublesome, the construction efficiency is low, and the precision of the curved steel box Liang Lawei is poor.
Disclosure of Invention
In order to improve the construction efficiency and the landing precision of the curved steel box girder crossing the existing high speed, the application provides a precise pushing construction method of the curved steel box girder crossing the existing high speed.
The accurate pushing construction method for the cross-existing high-speed curved steel box girder adopts the following technical scheme:
an accurate pushing construction method for a cross-existing high-speed curved steel box girder comprises the following steps:
constructing a temporary buttress along a designed pushing line, and installing a pushing device on the temporary buttress;
hoisting the curved steel box girder to the temporary buttress and arranging the curved steel box girder above the pushing device;
hoisting a front guide beam to the front of the pushing direction of the curved steel box girder, supporting the front guide beam on the temporary buttress, and connecting the front guide beam with the curved steel box girder;
hoisting a tail beam to the rear of the pushing direction of the curved steel box beam, and connecting the tail beam with the curved steel box beam;
pushing the curved steel box girder to advance by the pushing device until the front end of the curved steel box girder crosses the existing high speed to a preset position, and at the moment, two ends of the curved steel box girder are respectively supported on the temporary buttresses close to the existing high speed;
installing a slideway and a traction device on the temporary buttress close to the existing high speed, wherein the traction device is arranged on one side of the curved steel box girder and is connected with the curved steel box girder;
starting the traction device to traction the curved steel box girder to slide to a designed position along the slideway;
and removing the temporary buttress, the slideway, the traction device and the pushing device.
By adopting the technical scheme, after the curved steel box girder is pushed by the pushing device to move across the existing high speed, the curved steel box girder is moved by the slideway and the traction device, so that the curved steel box girder can be accurately positioned to a designed position, the error generated by pushing construction of the curved steel box girder can be improved in the subsequent traction step, and finally the curved steel box girder is moved across the existing high speed and is accurately positioned; the pushing construction process of the curved steel box girder does not need to accurately control errors, so that the difficulty of pushing construction is reduced, and the efficiency of pushing construction is improved.
Preferably, before the curved steel box girder is pushed forward, a test pushing test is carried out, the curved steel box girder is pushed forward by 4-6m through the pushing device, and whether the stress conditions of all the equipment and all the supporting structures meet the design requirements is detected.
By adopting the technical scheme, the stability of each device and each supporting structure can be detected before the pushing construction of the curved steel box girder is formally started through the trial pushing test, so that the safety of the pushing construction is improved.
Preferably, the temporary buttress comprises a plurality of upright posts, a distribution beam, support columns and a support beam, wherein a plurality of upright posts are connected with each other through steel pipes, the distribution beam is installed at the upper ends of the upright posts and connected with a plurality of upright posts, the support columns are installed on the distribution beam, the support beam is installed at the upper ends of the support columns, and the pushing device is installed on the distribution beam.
By adopting the technical scheme, the distribution beam can distribute the stress of the support column, the support beam and the pushing device to the upright posts, so that the support stability is improved.
Preferably, the pushing device comprises a walking jack and a cushion beam, the walking jack is mounted on the distribution beam, the cushion beam is mounted on the walking jack, and the walking jack drives the cushion beam to move along a preset direction.
Through adopting above-mentioned technical scheme, the bolster supports Qu Xinggang case roof beam from the below, and the rethread walking jack drives the bolster and removes to push forward curved steel case roof beam.
Preferably, an assembly bracket is further constructed on one side of the designed route of the bridge, the assembly bracket is arranged between the two temporary buttresses at the rear, the curved steel box girder is supported by the assembly bracket for section welding, and the assembly bracket is operated to be separated from the curved steel box girder before the curved steel box girder is pushed to advance.
By adopting the technical scheme, the bent steel box girder is welded at the assembling bracket, the Qu Xinggang box Liang Fenduan can be hoisted, and the hoisting difficulty of the bent steel box girder is reduced.
Preferably, in the pushing and advancing process of the curved steel box girder by the pushing device, a steel plate or an extraction steel plate is padded between a pushing supporting point of the pushing device and the bottom of the curved steel box girder according to actual needs.
By adopting the technical scheme, the curved steel box girder is stably connected with the pushing device, so that the supporting position of the bottom of the curved steel box girder is more reliable in stress, and the pushing advancing precision is higher.
Preferably, before the curved steel box girder is pushed, leveling structures are respectively arranged at two ends of the curved steel box girder, and the leveling structures are arranged along the axial direction of the curved steel box girder.
By adopting the technical scheme, the sliding surfaces of the curved steel box girders are positioned in the same plane by the leveling structure, so that the curved steel box girders are kept to slide stably, and the sliding safety and the sliding precision of the curved steel box girders are improved.
Preferably, pull ropes are respectively bound on two sides of the front end of the front guide beam, and the pushing advancing direction of the curved steel box beam is adjusted by tightening the pull ropes in the pushing advancing process of the curved steel box beam.
Through adopting above-mentioned technical scheme, when the direction of pushing away of bent steel case roof beam advance takes place the skew, through taut corresponding stay cord, can make the direction of pushing away of bent steel case roof beam advance resume normal direction gradually to improve the pushing away efficiency of bent steel case roof beam.
In summary, the present application at least includes the following beneficial technical effects: after the curved steel box girder is pushed by the pushing device to move across the existing high speed, the curved steel box girder is moved through the slideway and the traction device, so that the curved steel box girder can be accurately positioned to a designed position, therefore, errors generated in pushing construction of the curved steel box girder can be improved in the subsequent traction step, and finally the curved steel box girder is moved across the existing high speed and is accurately positioned; in addition, an accurate control error is not needed in the pushing construction process of the curved steel box girder, the difficulty of pushing construction is reduced, and the efficiency of pushing construction is improved.
Drawings
Fig. 1 is a schematic view of an embodiment of the present application after construction of a temporary buttress and splice bracket.
Fig. 2 is a schematic view of a curved steel box girder, a leading girder and a trailing girder after hoisting according to an embodiment of the present application.
Fig. 3 is a schematic view of a split bracket according to an embodiment of the present application with portions removed.
FIG. 4 is a schematic illustration of a curved steel box girder of an embodiment of the present application after pushing forward across an existing high speed.
Fig. 5 is a schematic diagram of a leveling structure of an embodiment of the present application after installation.
FIG. 6 is a schematic cross-sectional view of a curved steel box girder installation leveling structure of an embodiment of the present application.
Fig. 7 is a schematic illustration of a curved steel box Liang Xuanzhuai of an embodiment of the present application prior to sliding.
Fig. 8 is a schematic illustration of the curved steel box Liang Xuanzhuai of an embodiment of the present application after sliding.
Fig. 9 is a schematic view of a curved steel box girder after in-situ lengthening construction according to an embodiment of the present application.
Fig. 10 is a schematic structural view of a temporary buttress according to an embodiment of the present application.
Reference numerals illustrate:
1. temporary buttresses; 11. a first buttress; 12. a second buttress; 13. a third buttress; 14. a fourth buttress; 15. fifth buttress; 2. assembling a bracket; 21. a first bracket; 22. a second bracket; 3. a pushing device; 31. walking jack; 32. a bolster; 4. a concrete beam section; 5. a curved steel box girder; 51. an intermediate section; 52. a front section; 53. a rear section; 6. a front guide beam; 7. tail boom; 8. leveling structure; 9. a slideway; 10. a traction device; 111. a column; 112. a distribution beam; 113. a support column; 114. a support beam.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-10.
The embodiment of the application discloses a precise pushing construction method for a cross-existing high-speed curved steel box girder.
The accurate pushing construction method for the cross-existing high-speed curved steel box girder comprises the following steps:
s1, referring to FIG. 1, constructing five groups of temporary piers 1 and two groups of spliced brackets 2 along a designed pushing route, installing pushing devices 3 on the temporary piers 1, and installing two pushing devices 3 on each temporary pier 1. The five groups of temporary piers 1 are distributed along the pushing direction and are respectively numbered as a first pier 11, a second pier 12, a third pier 13, a fourth pier 14 and a fifth pier 15 from back to front, wherein the existing high speed passes through the fifth pier 15 from the fourth pier 14, the first pier 11 is connected with the cast-in-situ concrete beam section 4 and transmits partial load to the cast-in-situ concrete beam section 4. The two groups of spliced brackets 2 are distributed along the pushing direction and numbered as a bracket 21 and a bracket 22, wherein the bracket 21 is arranged between the bracket 11 and the bracket 12, and the bracket 22 is arranged between the bracket 12 and the bracket 13.
S2, referring to FIG. 2, a crane is used for hoisting the curved steel box girder 5 to the upper side of the temporary buttress 1 and supporting the curved steel box girder to the upper end of the temporary buttress 1, and the pushing device 3 is positioned below the Qu Xinggang box girder 5. The curved steel box girder 5 of this embodiment is manufactured by using in-plant segments, and is divided into three segments in total, wherein the three segments are respectively a front segment 52 with a length of 18.5 meters, a middle segment 51 with a length of 19 meters and a rear segment 53 with a length of 18.5 meters, the front segment 52, the middle segment 51 and the rear segment 53 are respectively transported to the site, and then are sequentially hoisted and spliced to form the curved steel box girder 5 with a whole length of 56 meters. During hoisting, the middle section 51 is hoisted firstly, the rear end of the middle section 51 is supported on the first bracket 21, and the front end of the middle section 51 is supported on the second buttress 12. And then hoisting the front section 52, supporting the rear end of the front section 52 on the second buttress 12 and butting with the front end of the middle section 51, supporting the front end of the front section 52 on the second bracket 22, and mutually welding and fixing the rear end of the front section 52 and the front end of the middle section 51. And finally hoisting the rear section 53, wherein the front end of the rear section 53 is supported on the first bracket 21, the rear end of the rear section 53 is supported on the first buttress 11, and then the front end of the rear section 53 and the rear end of the middle section 51 are mutually welded and fixed to finish hoisting and splicing the curved steel box girder 5.
S3, referring to FIG. 2, hoisting the front guide beam 6 to the front of the pushing direction of the curved steel box beam 5 by adopting a crane, supporting the front guide beam 6 on the pushing device 3, and then connecting the front guide beam 6 with the curved steel box beam 5. The front guide beam 6 is 35 m long, the front guide beam 6 is formed by multi-section splicing, and the front guide beam 6 is integrally hoisted after the ground splicing is completed. During hoisting, the rear end of the front guide beam 6 is supported on the second bracket 22, the front end of the front guide beam 6 is supported on the fourth buttress 14, the middle part of the front guide beam 6 is supported on the third buttress 13, and then the rear end of the front guide beam 6 and the front end of the curved steel box girder 5 are welded and fixed with each other.
S4, referring to FIG. 2, after the front guide beam 6 is lifted, the tail beam 7 is lifted again. The tail beam 7 is 10 m long, the tail beam 7 is hoisted to the rear of the curved steel box beam 5 by adopting a crane, and the front end of the tail beam 7 and the rear end of the curved steel box beam 5 are mutually fixed and welded.
S5, referring to FIG. 3, the spliced bracket 2 is completely or partially dismantled, so that the spliced bracket 2 is separated from the curved steel box girder 5. The portion of the split shelf that contacts the curved steel box girder 5 is preferably removed while the other portion remains.
S6, installing and debugging a pushing operation system, performing a trial pushing test, controlling the pushing devices 3 to push the curved steel box girder 5 to advance for 4-6m, preferably 5m, through the pushing operation system, and detecting whether the stress conditions of the pushing devices 3 and the temporary piers 1 meet the design requirements. If the stress of the pushing device 3 does not meet the design requirement, replacing the corresponding pushing device 3; if the stress of the temporary buttress 1 does not meet the design requirement, the temporary buttress 1 is reinforced.
S7, referring to FIG. 4, the pushing device 3 is controlled by the pushing operation system to push the curved steel box girder 5 forward until the front end of the curved steel box girder 5 spans the existing high speed to a preset position, at this time, the rear end of the curved steel box girder 5 is supported on the fourth buttress 14, and the front end of the curved steel box girder 5 is supported on the fifth buttress 15. Part of the front guide beam 6 is removed, the rearmost section of the front guide beam 6 is left, and the tail beam 7 is left.
S8, referring to fig. 5 and 6, leveling structures 8 are respectively arranged at the bottoms of the two ends of the curved steel box girder 5, the leveling structures 8 are made of stiffening HM488 multiplied by 300 steel, and the leveling structures 8 are arranged along the axial direction of the curved steel box girder 5. Because the bottom surface of bent steel case roof beam 5 is the arcwall face, cause bent steel case roof beam 5 to rock unstably easily in follow-up slip process, and after installing leveling structure 8, leveling structure 8's bottom surface is horizontal plane, can improve follow-up bent steel case roof beam 5 and slide the stationarity. Referring to fig. 7, two slide ways 9 and a set of traction devices 10 are respectively installed on a fourth buttress 14 and a fifth buttress 15, and the slide ways 9 are made of phi 30 round steel. The slide way 9 extends to the design position of the curved steel box girder 5, and limiting blocks are respectively arranged at two ends of the slide way 9. And then installing a traction device 10 on the offset side of the curved steel box girder 5, and connecting the traction device 10 with the curved steel box girder 5.
S9, referring to fig. 7 and 8, the traction device 10 is started, and the curved steel box girder 5 is rotationally slipped to a design position along the slideway 9.
S10, referring to FIG. 9, the temporary buttress 1, the slideway 9, the traction device 10, the pushing device 3 and the rest of the assembled bracket 2 are removed. And fine adjustment is carried out on the elevation of the curved steel box girder 5 through a jacking jack, and the curved steel box girder 5 enters an in-situ lengthening construction procedure after the designed elevation is achieved.
Referring to fig. 10, the temporary buttress 1 includes a plurality of columns 111, a plurality of distribution beams 112, a plurality of support beams 113, and two support beams 114, the plurality of columns 111 are divided into two groups aligned front and rear with each other, each group includes a plurality of columns 111, and the plurality of columns 111 are fixedly connected to each other through steel pipes. The plurality of distribution beams 112 are all installed between the front and rear groups of upright posts 111, the two ends of the distribution beams 112 are respectively and fixedly connected with the upper ends of the front and rear aligned two upright posts 111, the plurality of support columns 113 are respectively installed on the plurality of distribution beams 112, the two support columns 113 are installed on each distribution beam 112, the plurality of support columns 113 are arranged into two rows which are aligned front and rear, and the two support beams 114 are respectively installed at the upper ends of the front and rear rows of support columns 113. The slide ways 9 are fixedly arranged on the upper surfaces of the supporting beams 114, each supporting beam 114 is provided with one slide way 9, and the slide ways 9 are parallel to the supporting beam 114. The distribution beam 112 is made of stiffening HM 488X 300 section steel, the support column 113 is made of phi 426X 16 steel pipe, and the support beam 114 is made of stiffening HM 488X 300 section steel.
Referring to fig. 10, the pusher 3 is mounted on the dispensing beam 112. The pushing device 3 comprises a walking jack 31 and a cushion beam 32, the walking jack 31 is arranged on the distribution beam 112, the cushion beam 32 is arranged on the walking jack 31, and the walking jack 31 drives the cushion beam 32 to move along a preset direction. The travel of the walking jack 31 is 600mm and the full load jack weight is 650t. The bolster 32 was made of double-spliced HM 488X 300 section steel. Pull ropes (not shown in the figure) are respectively bound on two sides of the front end of the front guide beam 6, and the pushing advancing direction of the curved steel box beam 5 is adjusted by tightening the pull ropes in the pushing advancing process of the curved steel box beam 5.
The traction device 10 may use a traction jack or a hoist. Before the traction device 10 is installed, a traction cross beam is installed on the offset side of the curved steel box girder 5, two support beams 114 are fixedly connected to two ends of the traction cross beam respectively, and the traction device 10 is fixedly installed on the traction cross beam.
If a gap is formed between the bolster 32 and the curved steel box girder 5 in the pushing and advancing process of the curved steel box girder 5, a steel plate is padded between a pushing fulcrum of the pushing device 3 and the bottom of the curved steel box girder 5; if the Qu Xinggang box girder 5 is rocked in the width direction, a steel plate is extracted between the pushing fulcrum of the pushing device 3 and the bottom of the curved steel box girder 5. The curved steel box girder 5 stably advances, the supporting position of the bottom of the curved steel box girder 5 is more reliably stressed, and the pushing advancing precision is higher. When the curved steel box girder 5 is pulled to rotate and slide to the design position along the slideway 9, if the positions of the front end and the rear end of the Qu Xinggang box girder 5 are not in the design position, the rear end of the curved steel box girder 5 is pulled first, so that the rear end of the curved steel box girder 5 slides to the design position, and then the front end of the curved steel box girder 5 is pulled, so that the front end of the curved steel box girder 5 rotates and slides to the design position, and the two ends of the curved steel box girder 5 are pulled repeatedly until the two ends of the curved steel box girder 5 rotate and slide to the design position.
The implementation principle of the accurate pushing construction method for the cross-existing high-speed curved steel box girder comprises the following steps: after the curved steel box girder 5 is pushed to cross the existing high speed by the pushing device 3, the curved steel box girder 5 is moved through the slideway 9 and the traction device 10, so that the curved steel box girder 5 can be accurately located to a designed position, errors generated in pushing construction of the curved steel box girder 5 can be improved in the subsequent traction step, and finally the curved steel box girder 5 is crossed to the existing high speed and accurately located. In addition, the pushing construction process of the curved steel box girder 5 does not need to accurately control errors, so that the difficulty of pushing construction is reduced, and the efficiency of pushing construction is improved.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The accurate pushing construction method for the cross-existing high-speed curved steel box girder is characterized by comprising the following steps of:
constructing a temporary buttress (1) along a designed pushing line, and installing a pushing device (3) on the temporary buttress (1);
hoisting the curved steel box girder (5) to the temporary buttress (1) and arranging the curved steel box girder above the pushing device (3);
hoisting a front guide beam (6) to the front of the pushing direction of the curved steel box girder (5), supporting the front guide beam (6) on the temporary buttress (1), and then connecting the front guide beam (6) with the curved steel box girder (5);
hoisting a tail beam (7) to the rear of the curved steel box beam (5) in the pushing direction, and connecting the tail beam (7) with the curved steel box beam (5);
pushing the curved steel box girder (5) to advance through the pushing device (3) until the front end of the curved steel box girder (5) spans the existing high speed to a preset position, and at the moment, two ends of the curved steel box girder (5) are respectively supported on the temporary buttress (1) close to the existing high speed;
a slideway (9) and a traction device (10) are arranged on the temporary buttress (1) close to the existing high speed, the traction device (10) is arranged on one side of the curved steel box girder (5), and the traction device (10) is connected with the curved steel box girder (5);
starting the traction device (10) to draw the curved steel box girder (5) to slide to a designed position along the slideway (9);
and removing the temporary buttress (1), the slideway (9), the traction device (10) and the pushing device (3).
2. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: before the curved steel box girder (5) is pushed forward, a trial pushing test is carried out, the curved steel box girder (5) is pushed forward by 4-6m through the pushing device (3), and whether the stress conditions of all equipment and all supporting structures meet the design requirements is detected.
3. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: the temporary buttress (1) comprises a plurality of upright posts (111), distribution beams (112), support columns (113) and support beams (114), wherein a plurality of upright posts (111) are connected with each other through steel pipes, the distribution beams (112) are installed at the upper ends of the upright posts (111) and are connected with a plurality of upright posts (111), the support columns (113) are installed on the distribution beams (112), the support beams (114) are installed at the upper ends of the support columns (113), and the pushing device (3) is installed on the distribution beams (112).
4. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: the pushing device (3) comprises a walking jack (31) and a cushion beam (32), the walking jack (31) is installed on the distribution beam (112), the cushion beam (32) is installed on the walking jack (31), and the walking jack (31) drives the cushion beam (32) to move along a preset direction.
5. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: and a splicing bracket (2) is also constructed on one side of the designed route of the bridge, the splicing bracket (2) is arranged between the two temporary buttresses (1) at the rear, the curved steel box girder (5) is supported by the splicing bracket (2) for section welding, and the splicing bracket (2) is operated to be separated from the curved steel box girder (5) before the curved steel box girder (5) is pushed to advance.
6. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: in the pushing and advancing process of the curved steel box girder (5) through the pushing device (3), a steel plate or an extracted steel plate is padded between a pushing supporting point of the pushing device (3) and the bottom of the curved steel box girder (5) according to actual needs.
7. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: before the curved steel box girder (5) is pushed, leveling structures (8) are respectively arranged at two ends of the curved steel box girder (5), and the leveling structures (8) are arranged along the axial direction of the curved steel box girder (5).
8. The accurate pushing construction method for the cross-existing high-speed curved steel box girder, which is disclosed in claim 1, is characterized in that: pull ropes are respectively bound on two sides of the front end of the front guide beam (6), and the pushing advancing direction of the curved steel box beam (5) is adjusted by tightening the pull ropes in the pushing advancing process of the curved steel box beam (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311427066.4A CN117488705A (en) | 2023-10-30 | 2023-10-30 | Accurate pushing construction method for cross-existing high-speed curved steel box girder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311427066.4A CN117488705A (en) | 2023-10-30 | 2023-10-30 | Accurate pushing construction method for cross-existing high-speed curved steel box girder |
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| CN202311427066.4A Pending CN117488705A (en) | 2023-10-30 | 2023-10-30 | Accurate pushing construction method for cross-existing high-speed curved steel box girder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118048818A (en) * | 2024-04-09 | 2024-05-17 | 广东省建筑设计研究院有限公司 | Straight-top construction method for overspan railway curve bridge |
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2023
- 2023-10-30 CN CN202311427066.4A patent/CN117488705A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118048818A (en) * | 2024-04-09 | 2024-05-17 | 广东省建筑设计研究院有限公司 | Straight-top construction method for overspan railway curve bridge |
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