CN112240005A - Tie-bar arch bridge pushing method with large span and large longitudinal slope - Google Patents
Tie-bar arch bridge pushing method with large span and large longitudinal slope Download PDFInfo
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- CN112240005A CN112240005A CN202011322167.1A CN202011322167A CN112240005A CN 112240005 A CN112240005 A CN 112240005A CN 202011322167 A CN202011322167 A CN 202011322167A CN 112240005 A CN112240005 A CN 112240005A
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- arch bridge
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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Abstract
The invention provides a large-span and large-longitudinal-slope tied arch bridge pushing method, which comprises the following steps: s1, arranging a temporary pier supporting system; s2, arranging a jack and a temporary supporting cushion block; s3, arranging a gradient adjusting mechanism system; s4, assembling a tied arch bridge structure; s5, pushing the tied arch bridge structure to advance; s6, mounting a permanent support; and S7, removing the temporary structure. The invention has the advantages of simple structure, convenient material taking, simple processing, reutilization and convenient operation during construction.
Description
Technical Field
The invention relates to the technical field of tied arch bridge pushing, in particular to a method for pushing a tied arch bridge with a large span and a large longitudinal slope.
Background
With the rapid development of building engineering, infrastructure engineering and transportation industry, the installation projects of various large-scale structures are increasing, and the requirements on the construction technology and the construction quality in the whole construction process are also increasing. The large-span and large-longitudinal-slope steel structure is increasingly widely applied to the field of constructional engineering, but most steel structures have the characteristics of large span, large longitudinal slope change, strong structural profile and the like, and the problems of limited construction land occupation range, complex machine tools and equipment and the like exist in the construction process.
In order to solve the structural characteristics and the construction environmental characteristics during construction, the bridge incremental launching construction method is widely applied due to the characteristics of high industrialization, small construction occupied area, simple equipment, no traffic blockage in the construction process, good structural integrity, repeated use of the equipment, no construction noise and the like. However, in the existing bridge pushing construction, technical difficulties such as variable stress, large reinforcing difficulty and the like exist.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a tie-arch bridge pushing method with a large span and a large longitudinal slope, which can effectively convert the stress direction of a structure, solve the problem that a temporary supporting method needs to be additionally arranged due to variable stress in the process of pushing the tie-arch bridge, solve the problems of high construction adjustment difficulty, high multi-point synchronous coordination difficulty and the like in the pushing construction period due to the influence of the longitudinal slope of the structure, and improve the pushing efficiency and the safety and stability in the construction period.
The invention provides a large-span and large-longitudinal-slope tied arch bridge pushing method, which comprises the following steps:
s1, arranging a temporary pier supporting system; uniformly arranging a plurality of temporary piers according to the span of the tied arch bridge;
s2, arranging a jack and a temporary supporting cushion block; arranging a jack and a temporary supporting cushion block at the upper end of the temporary pier;
s3, arranging a gradient adjusting mechanism system; arranging a gradient adjusting mechanism system at the upper ends of the jack and the temporary supporting cushion block according to a longitudinal gradient curve of the tied arch bridge;
s4, assembling a tied arch bridge structure; assembling a longitudinal gradient tied arch bridge structure by using a crawler crane and a truck crane, assembling front and rear guide beams, and pre-tensioning a sling;
s5, pushing the tied arch bridge structure to advance; jacking the tied arch bridge structure by using the jack, pushing a certain distance by using the jack, falling the jack back onto the temporary pier to finish a jacking advancing process, and returning the jack to the cylinder to an initial position; continuously jacking, pushing, falling back and returning to the cylinder through the jack to finish the pushing forward of the tied arch bridge structure until the tied arch bridge structure is in place;
s6, mounting a permanent support; after the tied arch bridge structure is in place, a permanent support is installed, the tied arch bridge structure synchronously falls to a designed elevation through the jack and falls to the upper end of the permanent support, and a cable force value is adjusted and fixed;
s7, removing the temporary structure; and after the tied arch bridge structure is fixed, detaching the front and rear guide beams, the jack, the temporary supporting cushion block and the temporary pier supporting system to finish the installation of the tied arch bridge.
Preferably, in S1, the temporary pier includes a pile top platform, and five steel pipe piles are arranged at the lower end of the pile top platform.
Preferably, the pile top platform is formed by cross arrangement of section steel into a square shape and welding fixation, the five steel pipe piles are arranged in a plum blossom shape, and the five steel pipe piles are supported and connected through steel pipes to form a lattice column.
Preferably, in S2, two jacks and four temporary support blocks are uniformly arranged at the upper end of the temporary pier.
Preferably, in S3, the concrete arrangement method of the gradient adjustment mechanism system is as follows: the method comprises the steps that through-length longitudinal section steel beams are arranged, transverse connecting beams are arranged between the through-length longitudinal section steel beams, vertical rods are arranged at the upper ends of the through-length longitudinal section steel beams according to the gradient height, the vertical rods are longitudinally connected and fixed through section steel along the tied arch bridge, and the vertical rods are transversely connected through the section steel to form a gradient adjusting mechanism system.
Compared with the prior art, the invention has the following beneficial effects:
1. the method and the structure provided by the invention are reasonable in arrangement and clear in stress, and further solve the problem that a temporary supporting method is required to be added due to variable stress of the large-span large-longitudinal-slope tied arch bridge, so that the method for integrally pushing the tied arch bridge after integral installation is truly realized.
2. The invention can effectively adjust the stress direction in the pushing process of the large-span large-longitudinal-slope tied arch bridge, prevent the structural damage to a structural system caused by stress change due to the influence of the gradient in the pushing process, and ensure the smooth construction quickly, efficiently and stably.
3. The method provided by the invention increases the overall stability of the pushing process, increases the synchronism of the pushing process, greatly increases the safety and reliability, and can be adjusted freely according to different slopes and special-shaped structures, thereby efficiently, safely and stably completing the pushing construction purpose.
4. The invention has the advantages of simple structure, convenient material taking, simple processing, reutilization and convenient operation during construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIGS. 1, 3-11 are schematic diagrams illustrating steps performed in accordance with embodiments of the present invention.
Fig. 2 is a schematic structural view of a temporary pier in the embodiment of the present invention.
Wherein, 1, pile top platform; 2. steel pipe piles; 3. temporary support pads; 4. a grade adjustment mechanism system; 5. a tied arch bridge structure; 6. front and rear guide beams; 7. a sling; 8. a permanent abutment; 9. a bridge.
Detailed Description
The following examples are provided to better understand the present invention, not to limit the present invention to the best mode, and not to limit the content and the protection scope of the present invention, and any similar or similar schemes obtained by combining the present invention with other prior art features or the present invention will fall within the protection scope of the present invention.
Examples
A large-span and large-longitudinal-slope tied arch bridge pushing method comprises the following steps:
s1, arranging a temporary pier supporting system; referring to fig. 1-2, ten temporary piers are uniformly arranged according to the span of the tied arch bridge; the temporary pier comprises a pile top platform 1, five steel pipe piles 2 are arranged at the lower end of the pile top platform 1, the pile top platform 1 is formed by cross arrangement of profile steel into a square shape and is welded and fixed, the five steel pipe piles 2 are arranged in a plum blossom shape, and the five steel pipe piles 2 are connected through steel pipe supports to form a lattice column, so that the overall stability of the temporary pier is enhanced;
s2, arranging a jack and a temporary supporting cushion block; referring to fig. 1, jacks and temporary supporting cushion blocks 3 are arranged at the upper ends of the temporary piers and the permanent abutment 8, and two jacks and four temporary supporting cushion blocks are uniformly arranged at the upper ends of the permanent abutment 8 and each temporary pier, and are used for temporarily placing the tied arch bridge;
s3, arranging a gradient adjusting mechanism system; referring to fig. 3-4, a gradient adjusting mechanism system 4 is arranged at the upper ends of the jacks and the temporary supporting cushion blocks 3 according to a longitudinal gradient curve of the tied arch bridge; the concrete arrangement method of the gradient adjusting mechanism system 4 is as follows: arranging full-length longitudinal section steel beams, arranging transverse connecting beams among the full-length longitudinal section steel beams, arranging vertical upright posts at the upper ends of the full-length longitudinal section steel beams according to the gradient height, connecting and fixing the vertical upright posts along the longitudinal direction of the tied arch bridge through section steel, and transversely connecting the vertical upright posts through the section steel to form a gradient adjusting mechanism system 4 serving as a main stress component in the assembling and integral pushing processes of the tied arch bridge;
s4, assembling a tied arch bridge structure; referring to fig. 5, the assembly of a longitudinal gradient tied arch bridge structure 5 is completed by using a crawler crane and a truck crane, then front and rear guide beams 6 are assembled, and then a sling 7 is pre-tensioned;
s5, pushing the tied arch bridge structure to advance; referring to fig. 6-9, the tied arch bridge structure 5 is jacked by the jack, the jack is jacked for a certain distance, the jack falls back to the temporary pier, a jacking advancing process is completed, and the jack returns to the cylinder to an initial position; continuously jacking, pushing, falling back and returning to the cylinder through the jack to complete the pushing forward of the tied arch bridge structure 5 until the tied arch bridge structure is in place; wherein, fig. 7 shows that the steel pipe pile is pushed to the first channel of the temporary river pier; FIG. 8 shows the position of the last steel pipe pile pushed to the temporary river pier; FIG. 9 shows the pushing to above the permanent abutment 8; FIG. 10 shows the pushing to the position of the bridge 9;
s6, mounting a permanent support; and after the tied arch bridge structure 5 is in place, a permanent support is installed, the tied arch bridge structure 5 synchronously falls to the designed elevation through the jack and falls to the upper end of the permanent support, and the cable force value is adjusted and fixed.
S7, removing the temporary structure; referring to fig. 11, after the tied arch bridge structure 5 is fixed, the front and rear guide beams 6, the jacks, the temporary support cushion blocks 3 and the temporary pier support system are removed, and the tied arch bridge is installed.
In the embodiment, the large-span longitudinal gradient bottom surface is converted into a horizontal bottom surface through the gradient adjusting mechanism system, and the pushing advancing of the arch bridge structure is completed through continuous jacking, pushing, falling back and cylinder returning of the pushing jack. The gradient adjusting mechanism system can reduce the height difference change of the pushing point in the pushing process, so that the pushing point is curved and straight, the jack support cushion block does not need to be adjusted, the pushing time is saved, the pushing work content is simplified, the pushing construction efficiency is improved, the construction cost is reduced, and the construction danger is reduced.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (5)
1. A large-span and large-longitudinal-slope tied arch bridge pushing method is characterized by comprising the following steps:
s1, arranging a temporary pier supporting system; uniformly arranging a plurality of temporary piers according to the span of the tied arch bridge;
s2, arranging a jack and a temporary supporting cushion block; arranging a jack and a temporary supporting cushion block at the upper end of the temporary pier;
s3, arranging a gradient adjusting mechanism system; arranging a gradient adjusting mechanism system at the upper ends of the jack and the temporary supporting cushion block according to a longitudinal gradient curve of the tied arch bridge;
s4, assembling a tied arch bridge structure; assembling a longitudinal gradient tied arch bridge structure by using a crawler crane and a truck crane, assembling front and rear guide beams, and pre-tensioning a sling;
s5, pushing the tied arch bridge structure to advance; jacking the tied arch bridge structure by using the jack, pushing a certain distance by using the jack, falling the jack back onto the temporary pier to finish a jacking advancing process, and returning the jack to the cylinder to an initial position; continuously jacking, pushing, falling back and returning to the cylinder through the jack to finish the pushing forward of the tied arch bridge structure until the tied arch bridge structure is in place;
s6, mounting a permanent support; after the tied arch bridge structure is in place, a permanent support is installed, the tied arch bridge structure synchronously falls to a designed elevation through the jack and falls to the upper end of the permanent support, and a cable force value is adjusted and fixed;
s7, removing the temporary structure; and after the tied arch bridge structure is fixed, detaching the front and rear guide beams, the jack, the temporary supporting cushion block and the temporary pier supporting system to finish the installation of the tied arch bridge.
2. The tie-arch bridge jacking method with the large span and the large longitudinal slope as claimed in claim 1, wherein in S1, the temporary pier comprises a pile top platform, and five steel pipe piles are arranged at the lower end of the pile top platform.
3. The tie-bar arch bridge pushing method for the long span and the long longitudinal slope of claim 2, wherein the pile top platform is formed by cross arrangement of section steel into a square shape and welding and fixing, the five steel pipe piles are arranged in a plum blossom shape, and the five steel pipe piles are supported and connected through steel pipes to form a lattice column.
4. The tie-arch bridge jacking method for large span and large longitudinal slope according to claim 1, wherein in S2, two jacks and four temporary supporting cushion blocks are uniformly arranged at the upper end of the temporary pier.
5. The tie-arch bridge jacking method with the large span and the large longitudinal slope as claimed in claim 1, wherein in S3, the concrete arrangement method of the slope adjusting mechanism system is as follows: the method comprises the steps that through-length longitudinal section steel beams are arranged, transverse connecting beams are arranged between the through-length longitudinal section steel beams, vertical rods are arranged at the upper ends of the through-length longitudinal section steel beams according to the gradient height, the vertical rods are longitudinally connected and fixed through section steel along the tied arch bridge, and the vertical rods are transversely connected through the section steel to form a gradient adjusting mechanism system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011322167.1A CN112240005B (en) | 2020-11-23 | 2020-11-23 | Tie-bar arch bridge pushing method with large span and large longitudinal slope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011322167.1A CN112240005B (en) | 2020-11-23 | 2020-11-23 | Tie-bar arch bridge pushing method with large span and large longitudinal slope |
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| CN112240005A true CN112240005A (en) | 2021-01-19 |
| CN112240005B CN112240005B (en) | 2022-03-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982169A (en) * | 2021-02-05 | 2021-06-18 | 湖北辉创重型工程有限公司 | Mounting method of through tied arch bridge |
| CN114319119A (en) * | 2021-12-28 | 2022-04-12 | 山东省公路桥梁建设集团有限公司 | Construction process of main bridge of bridge |
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| JP2002294633A (en) * | 2001-03-30 | 2002-10-09 | Mitsubishi Heavy Ind Ltd | Method and device for constructing arch-shaped structural body |
| CN101935987A (en) * | 2010-08-27 | 2011-01-05 | 中交一公局桥隧工程有限公司 | Construction method for integrally sliding large-span steel pipe arch of curved bridge |
| CN204343170U (en) * | 2014-12-08 | 2015-05-20 | 中铁六局集团有限公司 | A kind of tie-rod steel pipe arch bridge continuously construction tubular arch vertical shift pushing tow system |
| CN109958051A (en) * | 2019-03-04 | 2019-07-02 | 中国建筑第八工程局有限公司 | Large span difference in height tie-rod arch structure top-pushing mechanism and pushing method |
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2020
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| CN101935987A (en) * | 2010-08-27 | 2011-01-05 | 中交一公局桥隧工程有限公司 | Construction method for integrally sliding large-span steel pipe arch of curved bridge |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982169A (en) * | 2021-02-05 | 2021-06-18 | 湖北辉创重型工程有限公司 | Mounting method of through tied arch bridge |
| CN114319119A (en) * | 2021-12-28 | 2022-04-12 | 山东省公路桥梁建设集团有限公司 | Construction process of main bridge of bridge |
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| CN112240005B (en) | 2022-03-25 |
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