CN118600878A - Self-climbing support structure for bridge jacking and jacking method thereof - Google Patents

Abstract

The invention relates to a self-climbing support structure for bridge jacking and a jacking method thereof, wherein the support structure comprises steel pipe columns which are arranged at intervals and are formed by vertically splicing column sections, jacking supports are arranged on the steel pipe columns, and bridge jacking cylinders are arranged at the tops of the steel pipe columns; the jacking bracket comprises an upper beam bracket and a lower beam bracket which are movably lifted, a vertical telescopic oil cylinder is arranged between the vertical directions of the upper beam bracket and the lower beam bracket, the side surfaces of all upright post sections of the steel pipe upright posts are hinged with supporting pieces, when the supporting pieces are turned in place towards one side, the supporting pieces form support for the lower beam bracket, and when the supporting pieces are turned in place towards the other side, the supporting pieces do not interfere with the movable lifting of the upper beam bracket and the lower beam bracket; the upper beam support is fixedly connected with a bridge jacking cylinder, and a lifting appliance for lifting the upright post section is arranged on the peripheral surface of the upper beam support. When jacking, A, B groups of bracket structures are arranged below the bridge, A, B groups of bracket structures are adopted for automatic climbing alternately and the additional upright post sections are suspended to realize the bridge jacking operation, and the construction efficiency is high.

Description

Self-climbing support structure for bridge jacking and jacking method thereof

Technical Field

The invention relates to the field of bridge engineering and is a self-climbing support structure for bridge jacking and a jacking method thereof.

Background Art

Bridge jacking construction refers to lifting the bridge from a low position to the required elevation. The existing bridge jacking scheme mainly adopts the method of steel structure columns and jacks, that is, by setting multiple rows of steel structure columns under the bridge, and setting jacks on the top of the steel structure columns. During the jacking operation, the jacks are divided into two parts for alternating jacking, that is, after one part of the jacks lifts the bridge to a certain height, the other part of the jacks adds steel structure columns or raises the pads to increase the height, and the jacks at the heightened position start to work and continue to lift the bridge. After the jacking, the steel structure columns under the other part of the jacks are raised again. In this way, the bridge is lifted to the required height, and finally the corresponding bridge piers are cast to effectively support the bridge, that is, the bridge jacking construction operation is completed. However, the disadvantage of this method is that the overall construction structure is relatively complex, especially the construction of the support platform is huge, the labor intensity is high, and the construction efficiency is low. In order to solve this problem, as published in the Chinese patent literature, the authorization announcement number CN219731703U, the authorization announcement date September 22, 2023, and the name of the utility model are "A device for quickly installing steel pipe supports during bridge jacking", which discloses a structural scheme of setting up double steel pipe supports below the bridge jacking position, and using the jack on the top of the steel pipe support on one side of the double steel pipe support to jack it into place, and then the top of the steel pipe support on the other side is heightened and installed, and then the jack on the top of the heightened steel pipe support is used for jacking, so as to achieve the bridge jacking operation in an alternating manner. In addition, it discloses a hoisting and traction device to facilitate the hoisting and heightening operation of the steel pipe support. The above scheme can improve the efficiency of bridge jacking construction to a certain extent, but the disadvantage is that it is still necessary to set up a more complex operating platform, and the labor intensity of the overall disassembly and assembly construction is still relatively high. For this reason, the existing bridge jacking construction structure needs to be improved.

Summary of the invention

In order to overcome the above shortcomings, the purpose of the present invention is to provide a self-climbing support structure for bridge jacking and a jacking method thereof to the art, so as to solve the technical problems that the existing similar bridge jacking structures are relatively complex, the investment cost is large, the construction and disassembly of the operating platform are labor-intensive, and the construction efficiency is low. The purpose is achieved through the following technical solutions.

A self-climbing support structure for bridge jacking, the support structure includes steel pipe columns arranged at intervals, a jacking support arranged on the steel pipe columns, a bridge jacking cylinder is arranged on the top of each steel pipe column, and the steel pipe column is formed by vertically splicing column sections; the structural key points are that the jacking support includes an upper crossbeam support and a lower crossbeam support, the upper crossbeam support and the lower crossbeam support are distributed in the circumference of the entire row of steel pipe columns, and are movable and lifting relative to the entire row of steel pipe columns, a vertical telescopic cylinder is arranged between the upper crossbeam support and the lower crossbeam support to adjust the vertical spacing between the two during telescoping, and the side of each column section of the steel pipe column is hinged A flip support is provided. When the support is flipped to one side and in place, it supports the lower crossbeam bracket. When the support is flipped to the other side and in place, it is close to the side of the column section and does not interfere with the movable lifting of the upper crossbeam bracket and the lower crossbeam bracket. The upper crossbeam bracket is fixedly connected to the bridge jacking cylinder, and the bridge jacking cylinder is positioned and placed on the top of the corresponding steel pipe column, that is, the steel pipe column supports the bridge jacking cylinder and supports the upper crossbeam bracket at the same time. The circumferential position of the upper crossbeam bracket is provided with a horizontally arranged guide rail, and a hoist is provided in the guide rail for relative sliding and used to hoist the column section. Through the above structure, the jacking bracket can realize automatic climbing operation, and the support member automatically limits the position after climbing into place, eliminating the tediousness of manually repeatedly setting up and adjusting the jacking bracket. By setting the hoist, it is convenient to hoist the column section to quickly raise the top of the steel pipe column, thereby improving the overall construction efficiency.

An oblique telescopic rod is provided between the upper crossbeam support and the lower crossbeam support to keep the two in a horizontal supporting state when the vertical spacing between the two is adjusted, and the oblique telescopic rod is an automatically telescopic spring rod or hydraulic rod. Through this structure, the stability of the support of the upper crossbeam support and the lower crossbeam support is effectively guaranteed.

The two ends of the vertical telescopic oil cylinder and the two ends of the oblique telescopic rod are movably hinged with the upper crossbeam support and the lower crossbeam support. Through this structure, the spacing between the upper crossbeam support and the lower crossbeam support can be adjusted more stably and smoothly.

The upper crossbeam bracket and the lower crossbeam bracket are both combined rectangular frames, that is, the upper crossbeam bracket and the lower crossbeam bracket are both composed of a long crossbeam and a short crossbeam, and the long crossbeam and the short crossbeam are concave-convex matched and fixed by bolts. Through this structure, disassembly and assembly are more convenient, and the structural strength is guaranteed.

The bridge jacking oil cylinders are fixed with connecting plates on both sides, and the upper crossbeam brackets are fixed with support beams fixed to the connecting plates on both sides of the bridge jacking oil cylinders by bolts. Through this structure, the upper crossbeam brackets can achieve reliable limited support for the bridge jacking oil cylinders.

The support member is a support plate, and a bracket member is integrated below the support plate to form a support limit with the side surface of the column section when it is flipped into place.

The peripheral surface of the lower crossbeam support is integrated with a platform for people to get on, and the platform for people to get on is reserved with at least one opening adapted for the sling to suspend the column section. This structure eliminates the need to independently set up a platform for people to get on around the support structure. The platform for people to get on can also achieve self-climbing operation with the jacking support, which is more convenient.

Each column section of the steel pipe column is locked and fixed by a bracket and bolts. Through this structure, the support stability of the steel pipe column is ensured.

The lifting device is an electric hoist. With this structure, the operation and use are relatively simple and convenient.

The bridge jacking method uses a self-climbing support structure. Several groups of the support structures are arranged under the bridge and supported under the bridge by bridge jacking cylinders. The lower crossbeam support in the support structure is located on the ground in the initial state, and the upper crossbeam support and the bridge jacking cylinder are supported on the top of each steel pipe column. When the bridge is jacked, the support structure is divided into a group A support structure and a group B support structure. The bridge jacking cylinder in the group A support structure is started to work, and the bridge is jacked to a certain height and maintained in this state. The group B support structure controls the extension of the vertical telescopic cylinder to push the upper crossbeam support and the bridge jacking cylinder to rise until the top of the bridge jacking cylinder contacts the bottom surface of the bridge. Then the operator operates the hoist on the upper platform to lift the column section on the ground and transfer it to the gap between the bridge jacking cylinder and the top of the steel pipe column in the group B support structure, and aligns the newly added column section with the original steel The column sections at the top of the tube columns are spliced and fixed, and in this way the steel tube columns in the B group support structure are all raised by one column section; next, the vertical telescopic cylinder in the B group support structure is controlled to retract, and the bridge jacking cylinder and the upper crossbeam support are lowered to form a support with the top of the steel tube column. After the support is in place, the lower crossbeam support continues to rise until it passes the height position of the support member on the side of the next column section, and the support member flips open. At this time, the vertical telescopic cylinder is depressurized, and the lower crossbeam support freely falls and supports the support member of the column section, thus completing the bridge jacking cylinder heightening operation of the B group support structure; after completing the above operations, the B group support assembly is controlled to continue to jack up the bridge according to the same operation as the above-mentioned A group support assembly, and the A group support assembly is raised according to the bridge jacking cylinder heightening operation of the B group support assembly, and the bridge jacking operation is completed by the above-mentioned alternating jacking and heightening operations.

The overall structure of the present invention is relatively reasonable, and can realize self-climbing jacking operations, eliminating a considerable part of manual operations and the need to set up a complicated operating platform. The overall bracket can be disassembled and reused, which greatly reduces construction costs. At the same time, it reduces labor intensity and improves construction efficiency. The present invention is suitable for use as a jacking bracket for various types of bridges and other building structures, or as a structural improvement of similar jacking brackets.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the top surface structure of FIG. 1 .

FIG. 3 is a schematic diagram of an improved structure of FIG. 2 .

FIG. 4 is a schematic diagram of the connection structure of the bridge jacking cylinder of the present invention.

FIG. 5 is a schematic structural diagram of the connection between the long beam and the short beam of the upper beam support of the present invention.

FIG. 6 is a schematic structural diagram of the column segment hinged support member of the present invention, in which the support member is flipped open.

FIG. 7 is a schematic structural diagram of a state in which the support member of FIG. 6 is flipped upward into position.

FIG8 is a schematic diagram of the working state structure of the present invention.

FIG. 9 is a second schematic diagram of the working state structure of the present invention.

The serial numbers and names in the figure are: 1. Steel pipe column, 101. Column section, 102. Corbel bracket, 2. Bridge lifting cylinder, 201. Connecting plate, 3. Upper crossbeam bracket, 301. Support beam, 4. Lower crossbeam bracket, 401. Access platform, 402. Opening, 5. Vertical telescopic cylinder, 6. Oblique telescopic rod, 7. Guide rail, 8. Lifting device, 9. Support member, 901. Support plate, 902. Corbel member.

Implementation

The present invention will now be further described with reference to the accompanying drawings.

As shown in Figures 1 to 7, the self-climbing support structure for bridge jacking includes steel pipe columns 1 arranged at intervals, a jacking support arranged on the steel pipe columns, a bridge jacking cylinder 2 is arranged on the top of each steel pipe column, and the steel pipe column is formed by vertically splicing column sections 101. Specifically, both ends of the column section are provided with a bracket 102, and adjacent column sections are fixed by connecting the brackets with bolts. The above-mentioned jacking support includes an upper crossbeam support 3 and a lower crossbeam support 4. The upper crossbeam support and the lower crossbeam support are both combined rectangular frames, that is, the upper crossbeam support and the lower crossbeam support are both composed of a long crossbeam and a short crossbeam. The long crossbeam and the short crossbeam are matched with each other in a concave-convex manner and are fixed by bolts. The upper crossbeam support and the lower crossbeam support are distributed around the entire row of steel pipe columns, and are movable and lifting relative to the entire row of steel pipe columns. A vertical telescopic oil cylinder 5 is provided between the upper crossbeam support and the lower crossbeam support to adjust the vertical spacing between the two during telescoping. The two ends of the vertical telescopic oil cylinder are hingedly positioned with the upper crossbeam support and the lower crossbeam support, and the number of vertical telescopic oil cylinders is set according to the actual support strength requirements. An oblique telescopic rod 6 is also provided between the upper crossbeam support and the lower crossbeam support to keep the two in a horizontal support state when the vertical spacing between the two is adjusted. The oblique telescopic rod is an automatically telescopic spring rod or hydraulic rod, and the two ends of the oblique telescopic rod are hingedly positioned with the upper crossbeam support and the lower crossbeam support.

The side of each column section 101 of the above-mentioned steel pipe column 1 is hingedly provided with a flip support member 9, and the support member is a support plate 901, and a corbel member 902 is integrated below the support plate to form a support limit with the side of the column section when flipped into place. When the support member flips into place to one side, it supports the lower crossbeam bracket 4, and when the support member flips into place to the other side, it is close to the side of the column section and does not interfere with the movable lifting of the upper crossbeam bracket 3 and the lower crossbeam bracket. The upper crossbeam bracket is fixedly connected to the bridge jacking cylinder 2, specifically: a connecting plate 201 is fixedly provided on both sides of the bridge jacking cylinder, and the upper crossbeam bracket is fixedly provided with a support beam 301 fixed to the connecting plates on both sides of each bridge jacking cylinder by bolts. The bridge jacking cylinder is positioned and placed on the top of the corresponding steel pipe column, that is, the steel pipe column supports the bridge jacking cylinder and the upper crossbeam bracket at the same time.

A horizontally arranged guide rail 7 is arranged on the circumference of the upper crossbeam bracket 3. The guide rail is a channel steel structure. The two ends of the guide rail are fixed to the upper crossbeam bracket by bolts or welding. A sling 8 is arranged in the guide rail for relative sliding and for hoisting the column section 101. Specifically, the support of the sling is provided with rollers that form a limit with the upper and lower grooves of the guide rails, and the rolling of the rollers is used to realize the sliding of the sling relative to the guide rails. The sling is an electric hoist, which is convenient for hoisting.

A platform for getting on 401 is integrated on the circumference of the lower cross beam support 4, and the platform for getting on is reserved with at least one opening 402 for the hanging device 8 to suspend the column section 101.

The lifting method of the self-climbing support structure for bridge lifting is as follows. A plurality of groups of the support structures are arranged under the bridge and supported under the bridge by bridge lifting cylinders 2. The lower crossbeam support 4 in the support structure is initially located on the ground, and the upper crossbeam support 3 and the bridge lifting cylinder are supported on the top of each steel pipe column 1. When the bridge is lifted, the support structure is divided into a support structure of group A and a support structure of group B. The bridge lifting cylinder in the support structure of group A is started to lift the bridge to a certain height and maintain the state. The support structure of group B controls the extension of the vertical telescopic cylinder 5, as shown in Figure 8, to push the upper crossbeam support and the bridge lifting cylinder to rise until the top of the bridge lifting cylinder contacts the bottom surface of the bridge. Then the operator operates the hoisting device 8 on the above-mentioned platform 401 to lift the column section 101 on the ground and transfer it to the gap between the bridge lifting cylinder and the top of the steel pipe column in the support structure of group B, and splices and fixes the newly added column section with the column section at the top of the original steel pipe column. In this way, the steel pipe columns in the support structure of group B are all raised by one column section. Next, the vertical telescopic cylinder in the support structure of group B is controlled to retract. As shown in Figure 9, the bridge lifting cylinder and the upper beam support are lowered to form a support against the top of the steel pipe column. After the support is in place, the lower beam support continues to rise until it passes the height position of the support member 9 on the side of the next column section. The support member flips open, and the vertical telescopic cylinder is depressurized at this time. The lower beam support falls freely and supports the support member of the column section. The bridge lifting cylinder heightening operation of the support structure of group B is completed. After completing the above operations, the support assembly of group B is controlled to continue to lift the bridge in the same way as the above-mentioned support assembly of group A. The support assembly of group A is heightened in accordance with the bridge lifting cylinder heightening operation of the support assembly of group B. The bridge lifting operation is completed by the above-mentioned alternating lifting and heightening operations.

The above contents are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art may make obvious improvements or substitutions to the present invention in combination with existing common knowledge, which also fall within the protection scope of the claims of the present invention.

Claims (10)

1. A self-climbing support structure for bridge jacking, the support structure comprising steel pipe columns (1) arranged at intervals, a jacking support arranged on the steel pipe columns, a bridge jacking cylinder (2) arranged on the top of each steel pipe column, and the steel pipe column is formed by vertically splicing column sections (101); the characteristic is that the jacking support comprises an upper crossbeam support (3) and a lower crossbeam support (4), the upper crossbeam support and the lower crossbeam support are distributed in the circumference of the entire row of steel pipe columns (1), and are movable and lifting relative to the entire row of steel pipe columns, a vertical telescopic cylinder (5) is arranged between the upper crossbeam support and the lower crossbeam support for adjusting the vertical spacing between the two during telescopic operation, and each column section (101) of the steel pipe column 01) is hingedly provided with a flip support member (9) on the side thereof. When the support member flips to one side and is in place, it supports the lower crossbeam support. When the support member flips to the other side and is in place, it is closely attached to the side of the column section and does not interfere with the movable lifting and lowering of the upper crossbeam support and the lower crossbeam support. The upper crossbeam support is fixedly connected to the bridge lifting cylinder (2). The bridge lifting cylinder is positioned and placed on the top of the corresponding steel pipe column, that is, the steel pipe column supports the bridge lifting cylinder and also supports the upper crossbeam support. A horizontally arranged guide rail (7) is arranged on the circumference of the upper crossbeam support. A hoist (8) for relatively sliding and used to hoist the column section is arranged inside the guide rail. 2. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that an oblique telescopic rod (6) is provided between the upper crossbeam support (3) and the lower crossbeam support (4) to keep the two in a horizontal supporting state when the vertical spacing between the two is adjusted, and the oblique telescopic rod is an automatically telescopic spring rod or a hydraulic rod. 3. The self-climbing support structure for bridge jacking according to claim 2 is characterized in that the two ends of the vertical telescopic cylinder (5) and the two ends of the oblique telescopic rod (6) are movably hinged with the upper beam support and the lower beam support. 4. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that the upper beam support (3) and the lower beam support (4) are both modular rectangular frames, that is, the upper beam support and the lower beam support are both composed of long beams and short beams, and the long beams and the short beams are concave-convex matched and fixed by bolts. 5. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that connecting plates (201) are fixedly provided on both sides of the bridge jacking cylinder (2), and the upper crossbeam support is fixedly provided with a support beam (301) fixed to the connecting plates on both sides of each bridge jacking cylinder by bolts. 6. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that the support member (9) is a support plate (901), and a bracket member (902) is integrated under the support plate to form a support limit with the side of the column section (101) when it is flipped into place. 7. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that a platform for getting on (401) is integrated on the circumference of the lower crossbeam support (4), and the platform for getting on is reserved with at least one opening (402) adapted for the sling (8) to suspend the column section (101). 8. The self-climbing support structure for bridge jacking according to claim 1 is characterized in that each column segment (101) of the steel pipe column (1) is fixed by means of a corbel bracket (102) and bolts. 9. The self-climbing support structure for bridge jacking according to claim 1, characterized in that the hoist (8) is an electric hoist. 10. A method for lifting a self-climbing support structure for bridge lifting as claimed in claim 7, wherein a plurality of groups of the support structures are arranged under the bridge and supported under the bridge by a bridge lifting cylinder (2); the characteristic is that the lower crossbeam support (4) in the support structure is located on the ground in the initial state, and the upper crossbeam support (3) and the bridge lifting cylinder (2) are supported on the top of each steel pipe column (1); when the bridge is lifted, the support structure is divided into a group A support structure and a group B support structure, the bridge lifting cylinder in the group A support structure is started to lift the bridge to a certain height and maintain the state, and the group B support structure controls the extension of the vertical telescopic cylinder (5) to push the upper crossbeam support and the bridge lifting cylinder to rise until the top of the bridge lifting cylinder contacts the bottom surface of the bridge, and then the operator operates the hoist (8) on the manned platform (401) to lift the column section (101) on the ground and transfer it to the bridge lifting cylinder and the steel pipe column in the group B support structure. The gap between the tops of the steel pipe columns is formed, and the newly added column section is spliced and fixed with the column section at the top of the original steel pipe column. In this way, the steel pipe columns in the B group support structure are all raised by one column section; next, the vertical telescopic cylinder in the B group support structure is controlled to retract, and the bridge jacking cylinder and the upper crossbeam support are lowered to form a support with the top of the steel pipe column. After the support is in place, the lower crossbeam support continues to rise until it passes the height position of the support member (9) on the side of the next column section, and the support member flips open. At this time, the vertical telescopic cylinder is depressurized, and the lower crossbeam support freely falls and supports the support member of the column section. The above is to complete the bridge jacking cylinder heightening operation of the B group support structure; after completing the above operation, the B group support assembly is controlled to continue to jack up the bridge according to the same operation as the above group A support assembly, and the A group support assembly is raised according to the bridge jacking cylinder heightening operation of the B group support assembly. The bridge jacking operation is completed by the above alternating jacking and heightening operations.