Corbelled jointed ribbed bridge abutment and method of installation

Abstract

The present application belongs to the technical field of bridge abutment, and discloses a ribbed slab abutment with corbelling joint and a mounting method, which comprises a plurality of prefabricated components arranged in a spliced manner; the prefabricated component comprises an ear wall, a back wall, an abutment cap and a ribbed slab; the abutment caps of adjacent prefabricated components are arranged in a spliced manner, and the joint of the abutment caps is a corbelling structure; the ribbed slab is connected to the lower end of the abutment cap; the lower end of the ribbed slab is connected to a pile cap; and the pile cap is connected to the upper end of a pile foundation. The present application can realize factory prefabrication and batch production; after the components are transported to the site, only hoisting and mounting of the prefabricated components are needed, thereby avoiding complicated processes such as field formwork, reinforcement, maintenance and formwork removal, controlling the quality of the components, avoiding quality accidents and saving costs; bolt holes are reserved at the corbelling part; after the prefabricated components on both sides are connected by bolts through the reserved holes and coated with high-strength glue, the integrity of the prefabricated abutment can be improved, the adhesive force of the high-strength glue can be fully utilized, and the integrity of the joint can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of bridge abutment technology, and particularly relates to a ribbed abutment with a corbel joint and its installation method. Background Technology

[0002] Abutments are structures located at both ends of a bridge, supporting the bridge superstructure and connecting to the embankment. Their functions include transferring the load of the bridge superstructure to the foundation, resisting the pressure of the backfill behind the abutment, stabilizing the bridgehead roadbed, and ensuring a reliable and smooth connection between the bridgehead track and the track on the bridge.

[0003] Traditional precast bridge abutments rarely use rigid joints. Traditional wet joint construction still requires a certain curing time after pouring. For example, the process of using grouting sleeves and metal corrugated pipes is complicated and cannot guarantee construction quality. The construction cycle is long, the construction cost is high, and there are also environmental pollution problems.

[0004] Based on the above analysis, the problems and defects of the existing technology are as follows: traditional precast bridge abutments use fewer rigid joints, wet joints still require a certain curing time after pouring, the process is complicated, the construction cycle is long, the construction cost is high, and the construction quality cannot be guaranteed. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a ribbed bridge abutment with a corbel joint and an installation method thereof.

[0006] This invention is implemented as follows: a ribbed bridge abutment with a corbel-type joint includes:

[0007] Prefabricated components assembled in multiple ways;

[0008] The prefabricated components include ear walls, back walls, caps, and ribs. The caps of adjacent prefabricated components are assembled together, and the connection between the caps is a corbel structure.

[0009] The rib plate is connected to the lower end of the cap, the lower end of the rib plate is connected to the pile cap, and the pile cap is connected to the upper end of the pile foundation.

[0010] Furthermore, the prefabricated component is connected to the outer rear side of the back wall and the ear wall, connected to the front side of the back wall and the cap, and connected to the rib plate at the bottom of the back wall and the cap.

[0011] Furthermore, bolt holes are pre-drilled at the bracket of the platform cap, and adjacent platform caps are fixedly connected by bolts passing through the bolt holes.

[0012] Furthermore, washers are fitted at both ends of the bolt.

[0013] Furthermore, the joints of the brackets of the platform cap are reinforced with a layer of high-strength adhesive.

[0014] Furthermore, the bracket arm of the platform is internally provided with longitudinal reinforcement and stirrups, and the bolt holes are located away from the provided reinforcement and stirrups.

[0015] Furthermore, the pile cap and the pile foundation are poured simultaneously on the construction site, and the pile cap and the pile foundation are equipped with corresponding longitudinal reinforcement and stirrups.

[0016] Furthermore, the upper part of the bearing platform has multiple column slots reserved, and the lower part of the rib plate is inserted into the column slots reserved in the bearing platform.

[0017] Furthermore, high-strength concrete filler is poured between the outer side of the rib plate and the inner wall of the column groove to connect the rib plate and the foundation.

[0018] Another object of the present invention is to provide a method for installing a ribbed bridge abutment with a corbel joint, the method comprising:

[0019] Step 1: The pile foundation and pile cap are poured and cured at the construction site as required, and then the prefabricated components are transported to the site.

[0020] Step two: Position and install the rib plate into the column slot according to the established column slot, while aligning the bolt holes on both sides of the upper corbel structure. Then, pour high-strength concrete filler into the column slot to make the rib plate and the foundation a whole.

[0021] Step three: Apply high-strength adhesive to the joint of the corbels, using the bolt holes as positioning points. Finally, place washers at the bolt hole locations and install the bolts to make the entire abutment structure a whole.

[0022] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0023] First, addressing the technical problems existing in the prior art and the difficulty in solving them, this paper closely analyzes, in conjunction with the technical solution to be protected by this invention and the results and data obtained during the research and development process, how the technical solution of this invention solves the technical problems, and the inventive technical effects brought about by solving these problems. The specific description is as follows:

[0024] The ribbed abutment with corbel joint provided by this invention is a multi-segment ribbed abutment component that can be assembled. Prefabrication in the factory enables mass production. After the components are transported to the site, only hoisting and installation of the prefabricated components is required, avoiding the cumbersome processes of on-site formwork, reinforcement, curing, and demolding. The assembly line construction method used in the factory prefabrication ensures quality control of the components, preventing quality accidents and saving significant amounts of on-site materials such as formwork and scaffolding, thus reducing costs. Pre-drilled bolt holes at the corbel joint allow for bolt connection of the prefabricated components on both sides, followed by application of high-strength adhesive. This improves the overall integrity of the prefabricated abutment, fully utilizing the adhesive strength of the high-strength adhesive to ensure the integrity of the joint.

[0025] Second, considering the technical solution as a whole or from a product perspective, the technical effects and advantages of the technical solution to be protected by this invention are specifically described as follows:

[0026] 1. The ribbed abutment with corbel joint provided by the present invention includes: ear wall, back wall, abutment cap, flange, rib, foundation, pile foundation, bolts and rubber gaskets for connecting the corbel, and high-strength filler for connecting the rib and foundation.

[0027] 2. The corbel-type joint ribbed bridge abutment provided by this invention, through factory prefabrication, enables mass production. After the components are transported to the site, only hoisting and installation of the prefabricated components are required, avoiding the cumbersome processes of on-site formwork, reinforcement, curing, and demolding. The assembly line construction during factory prefabrication ensures control over component quality, preventing quality accidents and saving significant amounts of on-site materials such as formwork and scaffolding, thus reducing costs. Corbels are installed on the connecting side of the components, and the prefabricated components on both sides are bolted together through pre-drilled holes in the corbels. Applying a layer of high-strength adhesive to the joint improves the overall integrity of the prefabricated bridge abutment, fully utilizing the load-bearing capacity and cohesion of the bolts and high-strength adhesive to ensure the load-bearing capacity of the joint.

[0028] The ribbed abutment with corbel joint provided by this invention can greatly shorten the on-site construction cycle and reduce site occupation. At the same time, factory prefabrication makes the project quality easy to control and less affected by the weather. Especially in the renovation and reinforcement of old bridges in busy traffic sections, it can significantly reduce the impact on traffic.

[0029] This invention is convenient to construct, efficient, and simple in construction process. It solves the problems of long construction period, high construction cost, and environmental pollution of cast-in-place bridge abutments, as well as the problems of complex process and inability to guarantee quality in traditional wet joints.

[0030] Third, as supplementary evidence of the inventive step of the claims of this invention, it is also reflected in the following important aspects:

[0031] 1) The expected benefits and commercial value of the technical solution of the present invention after transformation are as follows: The present invention adopts a flow construction method for prefabrication in the factory, which makes the quality of the components controllable and prevents quality accidents. It can also save a lot of materials such as templates and scaffolding that need to be used on site, thus saving costs. It is less affected by the climate, especially in the renovation and reinforcement of old bridges in busy traffic sections, which can significantly reduce the impact on traffic.

[0032] 2) The technical solution of this invention fills a technical gap in the industry at home and abroad: the research on prefabrication at home and abroad is becoming increasingly in-depth, but most of the innovations in the field of bridges are concentrated on the prefabrication of the superstructure, while there are relatively few innovations on the substructure and they are mainly concentrated on the prefabrication innovation of the piers. This invention is an innovation on the prefabrication of the abutment, which is an innovation on the prefabrication of the substructure.

[0033] 3) The technical solution of the present invention solves a technical problem that people have long wanted to solve but have never been able to solve successfully: The present invention addresses the problem of poor load-bearing capacity at the joints of prefabricated structures by using bolts to connect the joints and applying high-strength adhesive, thereby improving their load-bearing capacity and effectively solving the problem of easy damage at the joints.

[0034] 4) The technical solution of the present invention overcomes technical bias: The present invention overcomes the problem that the prestressed tendons and wet joints are mainly used in the field of prefabrication. It uses rigid joints to connect two prefabricated components, and its bearing capacity is close to that of cast-in-place, which shortens the construction period, saves the time of wet joint curing, and reduces the prestressed tendon tensioning process. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the ribbed bridge abutment with a corbel joint provided in an embodiment of the present invention;

[0036] Figure 2 This is a structural exploded view of the corbel-type bridge abutment with a corbel connection provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the rib plate and the support platform being installed in accordance with an embodiment of the present invention;

[0038] In the diagram: 1. Pile foundation; 2. Pile cap; 3. Rib plate; 4. Cap; 5. Abutment wall; 6. Back wall; 7. High-strength concrete filler; 8. Corbel; 9. Adhesive joint; 10. Bolt; 11. Column slot. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] To enable those skilled in the art to fully understand how the present invention is specifically implemented, this section provides an explanatory description of the embodiments that expand upon the technical solutions of the claims.

[0041] like Figures 1 to 3 As shown, the corbel-type joint ribbed abutment provided in this embodiment of the invention includes a pile foundation 1, a pile cap 2, a rib 3, an abutment cap 4, an ear wall 5, a back wall 6, high-strength concrete filler 7, a corbel 8, an adhesive joint 9, bolts 10, and a column groove 11.

[0042] The pile cap 2 is connected to the pile foundation 1. Multiple ribs 3 are installed on the pile cap 2. The cap 4 and the back wall 6 are connected to the ribs. The ear wall 5 is used to connect the corbel 8 structure and is connected to the back wall 6.

[0043] like Figure 1 , Figure 2 The image shows an example of a pre-assembled corbel-type ribbed abutment. The abutment and ribs are connected by a socket joint. The ribs 3 are positioned and installed in the column slots 11, and then high-strength concrete filler 7 is poured to make them a single unit.

[0044] The column groove 11 supports the rib plate 3 and facilitates its positioning and installation. The high-strength concrete filler 7 fills the gap between the column groove 11 and the rib plate 3 after assembly, serves as a bonding agent, and can withstand a certain amount of tensile force.

[0045] After the upper connecting bracket 8 is assembled, high-strength adhesive is applied to the bracket joints and bolts 10 are used to fix it in the reserved holes. The bracket 8 plays the role of transmitting force, the high-strength adhesive plays the role of reinforcement, and the bolts 10 play the role of shear resistance and provide pre-tightening force to the structure to increase the overall integrity of the structure.

[0046] In this embodiment of the invention, the pile foundation 1 and the pile cap 2 are cast together as a whole. The upper part of the pile cap 2 is provided with a column groove for socket connection with the lower part of the rib plate 3. The rib plate 3, the cap 4, the ear wall 5, and the back wall 7 are cast together as precast components in the factory according to their respective connection parts. Different precast components are connected by a corbel.

[0047] like Figure 3 As shown, the upper part of the foundation 2 is provided with a column groove 11. The depth of the column groove 11 is 2 / 3 of the height of the foundation 2. Multiple ribs 3 are sequentially inserted into the column groove 11 and filled with high-strength concrete filler 7 to form a whole.

[0048] In this embodiment of the invention, during installation: First, the pile foundation 1 and the abutment 2 are poured and cured at the construction site according to the above requirements. Then, the prefabricated components from the processing plant are transported to the site. Next, the rib plate 3 is positioned and installed into the column slot 11 according to the established column slot 11. At the same time, the bolt holes on both sides of the upper corbel 8 structure are aligned. Then, high-strength concrete filler 7 is poured into the column slot 11 to make the rib plate 3 and the abutment 2 a whole. Then, high-strength adhesive is applied to the joint of the corbels, using the bolt holes as positioning points. Finally, shims are placed at the bolt hole positions, and bolts 10 are installed to make the entire abutment structure a whole. This corbel-type connected prefabricated abutment has a simple structure, is easy to install, and has a reliable structural connection, meeting the needs of actual engineering projects.

[0049] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ribbed bridge abutment with a corbel-type joint, characterized in that, The corbel-type joint ribbed abutment includes: Prefabricated components assembled in multiple ways; The prefabricated components include ear walls, back walls, caps, and ribs. The caps of adjacent prefabricated components are assembled together, and the connection between the caps is a corbel structure. The rib is connected to the lower end of the cap, the lower end of the rib is connected to the pile cap, and the pile cap is connected to the upper end of the pile foundation. The rear side of the precast component is connected to the outer side of the back wall and the ear wall, the front side of the back wall is connected to the cap, and the lower part of the back wall and the cap is connected to the rib plate. The bracket of the platform cap has pre-drilled bolt holes, and adjacent platform caps are fixedly connected by bolts passing through the bolt holes. The joints of the brackets of the platform cap are reinforced with a layer of high-strength adhesive.

2. The ribbed abutment with a corbel joint as described in claim 1, characterized in that, Washers are fitted at both ends of the bolt.

3. The ribbed abutment with a corbel-type joint as described in claim 1, characterized in that, The bracket arm of the platform is internally equipped with longitudinal reinforcement and stirrups, and the bolt holes are located away from the reinforcement and stirrups.

4. The ribbed bridge abutment with a corbel-type joint as described in claim 1, characterized in that, The pile cap and the pile foundation are poured simultaneously on the construction site, and the pile cap and the pile foundation are equipped with corresponding longitudinal bars and stirrups.

5. The ribbed abutment with a corbel-type joint as described in claim 1, characterized in that, The upper part of the pier has multiple column slots, and the lower part of the rib plate is inserted into the column slots reserved in the pier.

6. The ribbed bridge abutment with a corbel joint as described in claim 5, characterized in that, High-strength concrete filler is poured between the outer side of the rib plate and the inner wall of the column groove to connect the rib plate and the foundation.

7. A method for installing a ribbed bridge abutment with a corbel-type joint as described in any one of claims 1 to 6, characterized in that, The installation method of the ribbed abutment of the corbel joint includes: Step 1: The pile foundation and pile cap are poured and cured at the construction site as required, and then the prefabricated components are transported to the site. Step two: Position and install the rib plate into the column slot according to the established column slot, while aligning the bolt holes on both sides of the upper corbel structure. Then, pour high-strength concrete filler into the column slot to make the rib plate and the foundation a whole. Step three: Apply a layer of high-strength adhesive to the joint of the corbels, using the bolt holes as a reference. Finally, place washers at the bolt holes and install the bolts to make the entire abutment structure a whole.

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