Simply supported bridge structure with braced beam system

Abstract

The utility model discloses a simply supported bridge structure with bracing beam system belongs to bridge structure technical field, including steel plate beam, concrete bracing beam, pile foundation, bearing platform, abutment body, abutment cap and support cushion stone, the pile foundation is provided with two groups around symmetry, the bearing platform is correspondingly set up on the pile foundation, the abutment body is correspondingly set up on the bearing platform, the abutment cap is correspondingly set up on the abutment body, the bottom both sides of steel plate beam are set up on two groups of abutment cap through support cushion stone, and the clearance between the abutment cap of two groups is filled with C40 small stone concrete, the concrete bracing beam is set up between two groups of abutment body, the concrete bracing beam is located at the top of two groups of bearing platform, is provided with concrete link beam on the concrete bracing beam, the utility model discloses a kind of effectively enhanced bridge overall structure's synergic stress capacity, promote the simply supported bridge structure of displacement and deformation performance of abutment of single-row pile.

Description

Technical Field

[0001] This utility model relates to the field of bridge structure technology, and in particular to a simply supported bridge structure with a bracing beam system. Background Technology

[0002] Simply supported beam bridges, as a common type of bridge, are widely used in the construction of small and medium-span bridges due to their simple structure and convenient erection. In the construction of small simply supported bridges, for bridges with small spans, single-row pile foundations are often used for the abutments because the vertical load is relatively small. While the axial compressive bearing capacity of a single-row pile can meet the bearing requirements of the vertical load, it is prone to displacement and deformation under the horizontal earth pressure behind the abutment, which affects the stability and service life of the bridge structure. To solve the above problems, this utility model proposes a simply supported bridge structure with a braced beam system, which improves the overall stability and load-bearing capacity of the bridge through optimized structural design. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a simply supported bridge structure that effectively enhances the overall structural strength of the bridge and improves the displacement and deformation resistance of the abutments using a single row of piles.

[0004] To achieve this objective, the present invention adopts the following technical solution: This utility model provides a simply supported bridge structure with a supporting beam system, including a steel plate beam, a concrete supporting beam, pile foundation, pile cap, abutment body, abutment cap and bearing pad. The pile foundation is arranged symmetrically on the left and right, the pile cap is correspondingly arranged on the pile foundation, the abutment body is correspondingly arranged on the pile cap, and the abutment cap is correspondingly arranged on the abutment body. The steel plate beam is supported on two sets of abutment caps by bearing pads on both sides of its bottom. The gap between the two sets of abutment caps and the steel plate beam is filled with C40 small stone concrete. The concrete support beam is set between the two sets of abutment bodies and is located on the top of the two sets of abutment caps. A concrete connecting beam is set on the concrete support beam.

[0005] The preferred technical solution of this utility model is that it further includes two sets of abutment ear walls, which are respectively arranged on both sides of the abutment body and the abutment cap.

[0006] The preferred technical solution of this utility model is that four concrete support beams are cast between the two sets of bridge abutment bodies, and two concrete connecting beams are cast between the four concrete support beams.

[0007] The preferred technical solution of this utility model is that a gravel cushion layer is laid at the bottom of the concrete support beam, and the gravel cushion layer has a thickness of 20cm.

[0008] The preferred technical solution of this utility model is that dry-laid rubble is symmetrically arranged on both sides of the gravel cushion layer.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention establishes a concrete support beam system between two abutments, while simultaneously filling the gap between the abutment cap and the steel plate beam with C40 aggregate concrete. This allows the horizontal earth pressure to be transmitted between the abutments on both sides through the steel plate beam and the support beam, achieving mutual cancellation of horizontal forces on both sides of the abutments. This effectively solves the deformation problem of abutments with single-row pile foundations under earth pressure, effectively improves the overall stability and load-bearing capacity of simply supported bridges, reduces the impact of loads and foundation settlement on the bridge structure, and extends the service life of the bridge. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a simply supported bridge structure provided in a specific embodiment of this utility model; Figure 2 This is a top view of a simply supported bridge structure provided in a specific embodiment of this utility model; Figure 3 This is provided in a specific embodiment of the present utility model. Figure 1 Cross-sectional view of the AA structure.

[0011] The attached diagram lists the components represented by each number as follows: 1. Steel plate beam; 11. C40 small stone concrete; 2. Concrete support beam; 21. Concrete tie beam; 22. Gravel cushion layer; 3. Pile foundation; 4. Pier cap; 5. Abutment body; 6. Abutment cap; 7. Bearing pad; 8. Abutment wing wall; 9. Dry-laid rubble masonry. Detailed Implementation

[0012] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] A simply supported bridge structure with a bracing system includes a steel plate beam 1, a concrete bracing beam 2, pile foundations 3, a pile cap 4, abutment body 5, abutment cap 6, and bearing pad 7. The pile foundations 3 are arranged symmetrically on the left and right sides. The pile caps 4 are correspondingly arranged on the pile foundations 3. The abutment bodies 5 are correspondingly arranged on the pile caps 4. The abutment caps 6 are correspondingly arranged on the abutment bodies 5. The bottom sides of the steel plate beam 1 are supported on two sets of abutment caps 6 by bearing pads 7. The gap between the two sets of abutment caps 6 and the steel plate beam 1 is filled with C40 small stone concrete 11. The concrete support beam 2 is set between the two sets of abutment bodies 5. The concrete support beam 2 is located on the top of the two sets of bearing caps 4. A concrete connecting beam 21 is set on the concrete support beam 2.

[0014] The sequential arrangement of pile foundation 3, pile cap 4, abutment body 5, and abutment cap 6 forms a stable vertical load-bearing system, effectively transferring the superstructure load to the foundation. Steel plate beam 1 is supported on abutment cap 6 via bearing pads 7, achieving simple support. C40 aggregate concrete 11 fills the gaps, enhancing the connection between steel plate beam 1 and abutment cap 6, preventing structural damage due to load impact at the gaps. This allows the horizontal earth pressure to be transferred between the two abutments via steel plate beam 1 and concrete support beam 2, achieving mutual cancellation of horizontal forces on both abutments and effectively resolving [the load]. The deformation problem of single-row piles under horizontal earth pressure behind the abutment was solved. The concrete support beam 2 is set between the two sets of abutment bodies 5 and on top of the pile cap 4, connecting the abutment structures on both sides into a whole, avoiding deformation of the abutment on one side due to excessive stress. The concrete connecting beam 21 further improves the integrity of the concrete support beam 2, making the support beam system more uniformly stressed, significantly enhancing the lateral stability of the bridge structure, effectively improving the overall stability and load-bearing capacity of the simply supported bridge, reducing the impact of load and foundation settlement on the bridge structure, and extending the service life of the bridge.

[0015] As a possible implementation of this solution, preferably, it also includes two sets of abutment ear walls 8, which are respectively arranged on both sides of the abutment body 5 and the abutment cap 6.

[0016] The abutment ear wall 8 is set on both sides of the abutment body 5 and the abutment cap 6. It can block and protect the backfill on both sides of the abutment, prevent the backfill from collapsing under vehicle load or natural factors, protect the stability of the soil structure around the abutment, and reduce the impact of soil collapse on the abutment structure.

[0017] As a possible implementation of this scheme, preferably, four concrete support beams 2 are cast between the two sets of bridge abutment bodies 5, and two concrete connecting beams 21 are cast between the four concrete support beams 2.

[0018] The four concrete support beams 2 form a multi-point support between the two sets of abutment bodies 5, which expands the load transfer range and can more evenly distribute the lateral load borne by the abutment. The two concrete connecting beams 21 connect the four concrete support beams 2, so that the support beam system forms an integral load-bearing structure, avoiding the fracture of a single support beam due to excessive local stress, and greatly improving the stiffness and deformation resistance of the support beam system.

[0019] As a possible implementation of this solution, preferably, a gravel cushion layer 22 is laid at the bottom of the concrete support beam 2, and the gravel cushion layer 22 has a thickness of 20cm.

[0020] A 20cm thick gravel cushion layer 22 is laid at the bottom of the concrete support beam 2. It has good elasticity and drainage. It can level the unevenness of the foundation surface, so that the bottom of the concrete support beam 2 is evenly stressed. At the same time, it can disperse the load transmitted by the concrete support beam 2 and reduce local settlement of the foundation. In addition, the gravel cushion layer 22 can drain surface water in time, preventing water from accumulating at the bottom of the support beam and causing the foundation to soften.

[0021] As a possible implementation of this scheme, preferably, dry-laid rubble stones 9 are symmetrically arranged on both sides of the gravel cushion layer 22.

[0022] The dry-laid rubble stones 9 are placed on both sides of the gravel cushion layer 22, which can provide lateral restraint and protection for the gravel cushion layer 22, preventing the gravel cushion layer 22 from lateral displacement or loss under load or water scouring, ensuring the integrity of the gravel cushion layer 22 structure, and ensuring that it can perform normal load-bearing and drainage functions. At the same time, the dry-laid rubble stones 9 themselves have a certain scouring resistance, further improving the durability of the cushion layer structure.

[0023] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A simply supported bridge structure with a bracing beam system, characterized in that: It includes a steel plate beam (1), a concrete support beam (2), a pile foundation (3), a pile cap (4), a bridge abutment body (5), a bridge abutment cap (6), and a bearing pad (7). The pile foundation (3) is symmetrically arranged in two sets on the left and right. The pile cap (4) is correspondingly arranged on the pile foundation (3). The bridge abutment body (5) is correspondingly arranged on the pile cap (4). The bridge abutment cap (6) is correspondingly arranged on the bridge abutment body (5). The bottom sides of the steel plate beam (1) are supported on two sets of abutment caps (6) by bearing pads (7). The gap between the two sets of abutment caps (6) and the steel plate beam (1) is filled with C40 small stone concrete (11). The concrete support beam (2) is set between the two sets of abutment bodies (5). The concrete support beam (2) is located on the top of the two sets of piers (4). A concrete connecting beam (21) is set on the concrete support beam (2).

2. A simply supported bridge structure with a braced beam system according to claim 1, characterized in that: It also includes two sets of abutment ear walls (8), which are respectively set on both sides of the abutment body (5) and the abutment cap (6).

3. A simply supported bridge structure with a braced beam system according to claim 1, characterized in that: The concrete support beams (2) are cast in four sections between the two sets of bridge abutment bodies (5), and two concrete connecting beams (21) are cast between the four concrete support beams (2).

4. A simply supported bridge structure with a braced beam system according to claim 1, characterized in that: The bottom of the concrete support beam (2) is covered with a gravel cushion layer (22), and the gravel cushion layer (22) has a thickness of 20cm.

5. A simply supported bridge structure with a braced beam system according to claim 4, characterized in that: Dry-laid rubble stones (9) are symmetrically arranged on both sides of the gravel cushion layer (22).

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