Bridge skewback underground connecting wall foundation structure

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By designing the movable supporting structure of the arch rib and the arch bridge base, the adaptive adjustment and fixation of the arch rib and the arch bridge base are achieved, which solves the problems of difficult and low efficiency in construction and improves construction efficiency.

CN223481880UActive Publication Date: 2025-10-28JINZHONGTIAN GRP CONSTRUCT CO LTD

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Patent Information

Application Number: CN202422661325.6
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-11-01
Publication Date: 2025-10-28
Estimated Expiration: 2034-11-01

AI Technical Summary

Technical Problem

The existing arch seat foundation and arch rib connection cannot be adaptively adjusted, resulting in great construction difficulty and low efficiency. When precise alignment is not possible, the entire arch bridge foundation needs to be adjusted.

Method used

A structural design including arch ribs, a first movable pedestal, a second movable pedestal and a base pedestal is adopted. The adaptive adjustment and fixation of the arch ribs and the arch bridge base are achieved through a combination of semicircular support feet, V-shaped grooves, arc grooves and fastening mechanisms.

Benefits of technology

It reduces the construction difficulty, improves the construction efficiency, ensures that the arch ribs and the arch bridge base are accurately connected within the error range, and avoids overall foundation adjustment.

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Abstract

The utility model belongs to the technical field of bridge engineering, and particularly relates to a bridge skewback underground connecting wall foundation structure which comprises an arch rib, a connecting base plate is installed at the bottom foot end of the arch rib, and the arch rib is sequentially connected with a first movable bearing platform, a second movable bearing platform and a base bearing platform through the connecting base plate. A semicircular supporting foot is integrally formed on the bottom face of the first movable bearing platform, a V-shaped groove movably connected with the semicircular supporting foot in a clamped mode is formed in the top face of the second movable bearing platform, a semicircular end face is integrally formed at the bottom of the second movable bearing platform, and the V-shaped groove is perpendicular to the extending direction of the semicircular end face. An arc-shaped groove which is attached to the semicircular end face and used for relative adjustment is formed in the bottom face of the base bearing platform. According to the utility model, adaptive adjustment can be carried out when the arch bridge base and the arch rib are connected, so that the arch bridge base and the arch rib are more convenient to connect, the whole arch bridge foundation does not need to be adjusted when accurate alignment cannot be carried out, the construction difficulty is reduced, and the efficiency is higher.

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Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering technology, specifically relating to a bridge arch abutment underground diaphragm wall foundation structure. Background Technology

[0002] Bridge engineering is an important branch of civil engineering, involving multiple aspects such as bridge surveying, design, construction, maintenance, and inspection. Among these, arch bridges are a frequently constructed type of bridge. An arch bridge is a type of bridge where the arch serves as the primary load-bearing structural component in the vertical plane. The load borne by the arch bridge is transferred to the arch foundation, which then bears both vertical and horizontal forces. Therefore, the rational design of the arch foundation plays a significant role in improving the safety, economy, and ease of construction of arch bridges.

[0003] Currently, the structural forms of arch abutment foundations generally include open-cut arch abutment foundations, composite pile arch abutment foundations, rock-socketed arch abutment foundations, and separated arch abutment foundations. When these types of arch abutment foundations are connected to the arch ribs, they are generally directly connected. Although this direct connection method is stable, it is impossible for the arch abutment foundation and the arch rib to be perfectly aligned during construction. Sometimes, it is necessary to make fine adjustments to the connection surface. Since the direct connection method cannot be adjusted adaptably, the entire arch bridge foundation must be adjusted, which is not only difficult to construct but also inefficient. Utility Model Content

[0004] The purpose of this utility model is to provide a bridge arch abutment underground ties foundation structure that can be adapted to the needs when connecting the arch bridge abutment and the arch rib, thereby making the connection between the arch bridge abutment and the arch rib more convenient. When precise alignment is not possible, there is no need to adjust the entire arch bridge foundation, reducing construction difficulty and increasing efficiency.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A bridge arch abutment underground wall foundation structure includes an arch rib, a connecting base plate is installed at the bottom of the arch rib, and the arch rib is sequentially connected to a first movable bearing platform, a second movable bearing platform and a base bearing platform through the connecting base plate.

[0007] The first movable support platform has a semi-circular support foot integrally formed on the bottom surface. The second movable support platform has a V-shaped groove on the top surface that can be movably engaged with the semi-circular support foot. The second movable support platform has a semi-circular end face integrally formed on the bottom surface. The V-shaped groove is perpendicular to the extension direction of the semi-circular end face. The base support platform has an arc-shaped groove on the bottom surface that fits against the semi-circular end face for relative adjustment.

[0008] A first fastening mechanism for adjustment and fixation is provided between the arch rib, the first movable support platform and the second movable support platform, and a second fastening mechanism for adjustment and fixation is provided between the second movable support platform and the base support platform.

[0009] As a preferred embodiment, the first fastening mechanism includes a first through hole on the connecting base plate, a second through hole on the first movable support, and nut seats rotatably connected to the four corners of the second movable support. The first through hole, the second through hole, and the nut seats are connected by bolt threads.

[0010] As a preferred embodiment, the rotation direction of the nut seat is consistent with the adjustable direction of the first movable support, and a gap is provided between the top surface of the nut seat and the bottom surface of the first movable support.

[0011] As a preferred embodiment, the second fastening mechanism includes a bolt post fixedly welded to the center of the arc-shaped groove and a rectangular through slot opened at the bottom end of the second movable support. The bolt post is inserted into the rectangular through slot and fixedly connected by a nut.

[0012] As a preferred embodiment, a pad is also embedded between the nut and the connecting surface of the second movable support. The pad is sleeved on the bolt post and has an arc surface at the bottom that fits against the inner side of the rectangular through groove.

[0013] As a preferred embodiment, the arch bridge foundation is also included, which is prefabricated underground. The foundation base is cast inside the arch bridge foundation, and the sides of the foundation base are uniformly welded with reinforcing legs and cast into concrete to increase adhesion.

[0014] As a preferred embodiment, the first movable platform, the second movable platform, and the base platform are all made of the same material, which is low-alloy steel or weathering steel.

[0015] The technical effects achieved by this utility model are as follows:

[0016] This utility model, by setting up a first movable support platform, a second movable support platform, and a base support platform to cooperate, allows for adjustments to the lateral and longitudinal installation positions when the arch rib and the arch bridge base are connected, so that the arch rib and the arch bridge base can be accurately connected within the error range. This avoids the situation where the entire arch bridge foundation needs to be adjusted due to incomplete and precise alignment, thereby reducing construction difficulty and increasing efficiency.

[0017] This utility model, by providing a first through hole, a bolt, a second through hole, and a nut seat, allows the connecting base plate, the first movable base, and the second movable base to be fixedly connected by adaptively swinging the nut seat after the first and second movable bases have been adjusted relative to each other. It also allows for adaptive adjustment and fixation following the adjustment of the first and second movable bases. Furthermore, by providing a rectangular through slot, a bolt post, a pad, and a nut, the second movable base and the base base can be adjusted as needed and then fixed after adjustment. This ensures a stable connection while making the connection more convenient and facilitating installation. Attached Figure Description

[0018] Figure 1 It is a front view of the utility model;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention;

[0021] Figure 4 This utility model Figure 3 Exploded view;

[0022] Figure 5 This utility model Figure 4 A magnified view of part A in the middle;

[0023] Figure 6 This is a schematic diagram of the connection structure between the arch rib, the first movable support, the second movable support, and the base support in this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Arch rib; 11. Connecting base plate; 12. First through hole; 13. Bolt; 2. First movable support; 21. Semi-circular support; 22. Second through hole; 3. Second movable support; 31. V-shaped groove; 32. Semi-circular end face; 33. Rectangular through groove; 34. Nut seat; 4. Base support; 41. Arc-shaped groove; 42. Bolt post; 43. Spacer; 44. Nut; 45. Reinforcing support; 5. Arch bridge base. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figures 1-6As shown, a bridge arch abutment underground diaphragm foundation structure includes an arch rib 1, with a connecting base plate 11 installed at the bottom of the arch rib 1. The arch rib 1 is sequentially connected to a first movable bearing platform 2, a second movable bearing platform 3, and a base bearing platform 4 via the connecting base plate 11. At the same time, an arch bridge base 5 is prefabricated underground on the riverbank. The arch rib 1 and the arch bridge base 5 are connected by the first movable bearing platform 2, the second movable bearing platform 3, and the base bearing platform 4, and the lateral and longitudinal positions can be adjusted as needed during the connection.

[0028] See attached document Figures 2-5 The base pier 4 is cast inside the arch bridge base 5. The base pier 4 has reinforced support feet 45 evenly welded on its sides and arranged in a T-shape. It is also cast into the concrete to increase adhesion, making the base pier 4 more stable in the arch bridge base 5, thereby ensuring the stability of the support for the arch rib 1 and the stability of the entire bridge.

[0029] See attached document Figures 4-6 To allow for adjustment of the horizontal and vertical installation positions, the bottom surface of the first movable support 2 is integrally formed with a semi-circular support leg 21, and the top surface of the second movable support 3 is provided with a V-shaped groove 31 that movably engages with the semi-circular support leg 21. After the semi-circular support leg 21 is inserted into the V-shaped groove 31, it can be adjusted longitudinally by adaptive rotation as needed, thereby adjusting the vertical installation position. Simultaneously, a semi-circular end face 32 is integrally formed at the bottom of the second movable support 3, and the V-shaped groove 31 is perpendicular to the extension direction of the semi-circular end face 32. Furthermore, the bottom surface of the base support 4 is provided with a groove that aligns with the semi-circular end face 32. The arc-shaped groove 41, which is used for relative adjustment, allows the second movable support 3 to be rotated laterally relative to the arc-shaped groove 41 after the semi-circular end face 32 is embedded in it. The installation position can then be adjusted by using the first movable support 2, the second movable support 3, and the base support 4 in coordination to adjust the lateral and longitudinal installation positions according to the installation requirements. This ensures that the arch rib 1 and the arch bridge base 5 can be accurately aligned within the error range, avoiding the need to adjust the entire arch bridge foundation due to incomplete and precise alignment. This reduces the construction difficulty and increases efficiency.

[0030] See attached document Figures 5-6To fix the adjusted arch rib 1, first movable support 2, and second movable support 3, a first through hole 12 is provided on the connecting base plate 11. Correspondingly, a second through hole 22 is provided on the first movable support 2. Nut seats 34 are rotatably connected to the four corners of the second movable support 3, and the rotation direction of the nut seats 34 is consistent with the adjustable direction of the first movable support 2, so that it can adaptively adjust and fix itself according to the adjustment of the first movable support 2 and the second movable support 3. Moreover, the top surface of the nut seat 34 is flush with the first movable support 2. A gap is provided between the bottom surfaces to avoid obstructing the first movable support 2 during relative adjustment. The arch rib 1, the first movable support 2 and the second movable support 3 are fixed by bolts 13 that can pass directly through the first through hole 12, the second through hole 22 and the nut seat 34 at the four corners. At the same time, the connection base plate 11 and the first movable support 2 can be reinforced by bolts 13 through the two first through holes 12 and the second through hole 22 in the middle (the second through hole 22 at this position has a thread that matches the bolt 13).

[0031] See attached document Figures 5-6 In order to fix the second movable support 3 and the base support 4 after adjustment, a bolt column 42 is fixedly welded to the center of the arc-shaped groove 41. At the same time, a rectangular through groove 33 is opened at the bottom of the second movable support 3. By inserting the bolt column 42 into the rectangular through groove 33, not only can the adjustment direction of the second movable support 3 be positioned, but the adjustment can also be made more stable. Furthermore, by setting a nut 44, it can be fixed after adjustment, making the adjustment more convenient and the fixing more convenient.

[0032] Furthermore, by embedding a pad 43 between the connecting surfaces of the nut 44 and the second movable bearing 3, and fitting the pad 43 onto the bolt post 42, and providing an arc surface at the bottom that fits against the inner side of the rectangular through groove 33, the arc surface of the rectangular through groove 33 can better fit against the inner side of the rectangular through groove 33, thereby increasing the contact area and further increasing the fixing area, making the second movable bearing 3 and the base bearing 4 more stably fixed.

[0033] In this embodiment, the first movable platform 2, the second movable platform 3, and the base platform 4 are all made of low alloy steel, and the connecting base plate 11 is also made of the same material. The connection method between the base plate 11 and the arch rib 1 is selected according to the different materials of the arch rib 1, such as welding, casting connection, integral molding, etc. Of course, in other embodiments, the first movable platform 2, the second movable platform 3, and the base platform 4 are all made of the same material, which can be low alloy steel or weathering steel.

[0034] The working principle of this utility model is as follows: When in use, firstly, the connecting base plate 11 and the first movable support 2 can be fixed together by passing the bolt 13 through the first through hole 12 and the second through hole 22 located in the middle. Then, the semi-circular support 21 is embedded in the V-shaped groove 31, the second movable support 3 is embedded in the arc-shaped groove 41, and the bolt post 42 is inserted into the rectangular through groove 33.

[0035] Secondly, according to the docking requirements of the arch rib 1 and the arch bridge base 5, the semi-circular support 21 of the first movable support 2 can swing longitudinally in the V-shaped groove 31 to adapt to the installation requirements. At the same time, the second movable support 3 can swing laterally in the arc-shaped groove 41 to adapt to the installation requirements. Thus, by using longitudinal and lateral adjustments, the arch rib 1 can accurately dock with the arch bridge base 5, avoiding the impact on the installation process due to incomplete and inaccurate alignment.

[0036] Finally, the second movable support 3 and the base support 4 are fastened together by the pad 43 and the nut 44 to ensure installation stability. At the same time, the lateral installation position is positioned. Then, the bolt 13 is used to pass through the first through hole 12 and the second through hole 22 at the four corners and is threaded to the nut seat 34 to fix the connecting base plate 11, the first movable support 2 and the second movable support 3 into one unit to ensure installation stability. At the same time, the longitudinal installation position is positioned. Then, the arch rib 1 and the arch bridge base 5 are adjusted and installed as needed without adjusting the entire arch bridge foundation, which reduces the construction difficulty and improves the construction efficiency.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A bridge arch abutment underground diaphragm foundation structure, comprising an arch rib (1), characterized in that: The bottom end of the arch rib (1) is equipped with a connecting base plate (11), and the arch rib (1) is sequentially connected to the first movable support (2), the second movable support (3) and the base support (4) through the connecting base plate (11). The first movable support (2) has a semi-circular support (21) integrally formed on the bottom surface. The second movable support (3) has a V-shaped groove (31) on the top surface that is movably engaged with the semi-circular support (21). The second movable support (3) has a semi-circular end face (32) integrally formed on the bottom surface. The V-shaped groove (31) is perpendicular to the extension direction of the semi-circular end face (32). The base support (4) has an arc-shaped groove (41) on the bottom surface that fits against the semi-circular end face (32) for relative adjustment. A first fastening mechanism for adjustment and fixation is provided between the arch rib (1), the first movable support (2) and the second movable support (3), and a second fastening mechanism for adjustment and fixation is provided between the second movable support (3) and the base support (4).

2. The bridge arch abutment underground diaphragm wall foundation structure according to claim 1, characterized in that: The first fastening mechanism includes a first through hole (12) on the connecting base plate (11), a second through hole (22) on the first movable support (2), and nut seats (34) rotatably connected to the four corners of the second movable support (3). The first through hole (12), the second through hole (22) and the nut seats (34) are connected by bolts (13) threaded together.

3. The bridge arch abutment underground diaphragm wall foundation structure according to claim 2, characterized in that: The rotation direction of the nut seat (34) is consistent with the adjustable direction of the first movable support (2), and a gap is provided between the top surface of the nut seat (34) and the bottom surface of the first movable support (2).

4. The bridge arch abutment underground diaphragm wall foundation structure according to claim 1, characterized in that: The second fastening mechanism includes a bolt post (42) fixedly welded to the center of the arc-shaped groove (41) and a rectangular through groove (33) opened at the bottom of the second movable support (3). The bolt post (42) is inserted into the rectangular through groove (33) and fixedly connected by a nut (44).

5. The bridge arch abutment underground diaphragm wall foundation structure according to claim 4, characterized in that: A pad (43) is also embedded between the nut (44) and the second movable support (3). The pad (43) is fitted onto the bolt post (42) and has an arc surface at the bottom that fits against the inner side of the rectangular through groove (33).

6. The bridge arch abutment underground diaphragm wall foundation structure according to claim 1, characterized in that: It also includes an arch bridge base (5) prefabricated underground, the base platform (4) being cast inside the arch bridge base (5), and the base platform (4) having reinforced legs (45) uniformly welded to its side and cast into concrete to increase adhesion.

7. The bridge arch abutment underground diaphragm wall foundation structure according to claim 1, characterized in that: The first movable support (2), the second movable support (3) and the base support (4) are all made of the same material, which is low alloy steel or weathering steel.