Bridge pile foundation underpinning structure and bridge

Abstract

The utility model belongs to the field of bridge buildings, and discloses a bridge pile foundation underpinning structure and a bridge, and the bridge pile foundation underpinning structure introduces a supplementary pile foundation structure on the basis of retaining an original pile foundation structure; the supplementary pile foundation structure comprises a supplementary pile foundation and a bearing platform. The supplementary pile foundations are arranged on the outer sides of the original pile foundations, the bearing platforms are connected to the straining beams, through arrangement of the supplementary pile foundations and connection of the bearing platforms, loads of the original pile foundation structure are effectively transferred and dispersed, and therefore the stability and safety of the bridge are remarkably improved. Under the structure, the original pile foundation structure does not directly bear external force in the bridge pile foundation underpinning structure, and the load originally borne by the original pile foundation structure is transferred and dispersed to the supplementary pile foundation structure. The bridge comprises the bridge pile foundation underpinning structure, so that the bridge also has the advantages of the bridge pile foundation underpinning structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and more specifically relates to a bridge pile foundation underpinning structure and a bridge. Background Art

[0002] In bridge construction, pile foundations are the key connection between bridges and foundations. Their main function is to bear the weight of the bridge and vehicle loads, and effectively transfer these loads deep into the foundation to ensure the stability and safety of the bridge. However, due to the complexity and variability of geological conditions, the construction of bridge pile foundations often faces many challenges.

[0003] Especially in areas with geological structures such as karst caves, the cavities and fillings inside the karst caves may cause significant changes in the mechanical properties of the foundation soil, which in turn affects the bearing capacity and stability of the pile foundation. According to traditional design and construction methods, when the pile foundation bearing capacity is insufficient, complex engineering measures such as foundation treatment and pile foundation reinforcement are usually taken to solve the problem.

[0004] For example, in terms of foundation treatment, it may be necessary to perform grouting, backfilling and other treatments on the foundation to improve the mechanical properties of the foundation; in terms of pile foundation reinforcement, it may be necessary to increase the number of pile foundations, increase the pile diameter or pile length, use stronger pile materials, etc. Although these measures can solve the problem of insufficient bearing capacity of pile foundations to a certain extent, they often have disadvantages such as long construction period, high cost and great impact on traffic.

[0005] In addition, for bridges that have already been built, if the pile foundation bearing capacity is insufficient, taking the above reinforcement measures may damage the structure and appearance of the bridge, affecting the normal use of the bridge. Therefore, how to solve the problem of insufficient pile foundation bearing capacity through a simple and effective structure without changing the original bridge design has become an urgent problem to be solved in the current bridge engineering field. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide a bridge pile foundation underpinning structure and a bridge to solve the technical problem of insufficient pile foundation bearing capacity existing in the prior art.

[0007] To achieve the above purpose, the technical solution adopted in this application is:

[0008] A bridge pile foundation underpinning structure is provided, comprising:

[0009] The original pile foundation structure comprises original pile foundations and tie beams, wherein the original pile foundations are arranged in pairs, and the tie beams are connected between the original pile foundations in pairs;

[0010] The supplementary pile foundation structure comprises a supplementary pile foundation and a cap, wherein the supplementary pile foundation is arranged outside the original pile foundation, the cap is connected to the tie beam, and the supplementary pile foundation is connected to the cap.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, the original pile foundation includes a first original pile foundation and a second original pile foundation, the tie beam is connected between the first original pile foundation and the second original pile foundation, and the outer sides of the first original pile foundation and the second original pile foundation are both provided with supplementary pile foundation structures.

[0013] Optionally, the supplementary pile foundation includes a first supplementary pile foundation and a second supplementary pile foundation, the first supplementary pile foundation and the second supplementary pile foundation are respectively arranged on both sides of the original pile foundation, the first supplementary pile foundation is located at the first end of the base, and the second supplementary pile foundation is located at the second end of the base.

[0014] Optionally, the tie beam and the support platform are arranged at an angle in the transverse plane.

[0015] Optionally, the first supplementary pile foundation structure connected to the first original pile foundation and the second supplementary pile foundation structure connected to the second original pile foundation are arranged symmetrically to each other.

[0016] Optionally, the first pedestal of the first supplementary pile foundation structure is located at the first end of the tie beam, and the second pedestal of the second supplementary pile foundation structure is located at the second end of the tie beam, and the first pedestal, the second pedestal and the tie beam are arranged in an H shape in a transverse plane.

[0017] Optionally, the distance between the supplementary pile foundation and the original pile foundation is not less than 2.75m.

[0018] Optionally, the original pile foundation structure and the supplemented pile foundation structure are an integrated structure.

[0019] Optionally, there are multiple supplementary pile foundation structures, and the supplementary pile foundation structures are staggered with each other.

[0020] Based on a general utility model concept, the utility model also provides a bridge, including the above-mentioned bridge pile foundation underpinning structure.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The present application provides a bridge pile foundation replacement structure. This replacement structure introduces a supplementary pile foundation structure on the basis of retaining the original pile foundation structure. The supplementary pile foundation structure can not only solve the problem of insufficient pile foundation bearing layer, but also solve the problems caused by geological caves. Specifically, the supplementary pile foundation structure includes a supplementary pile foundation and a cap. The supplementary pile foundation is arranged on the outside of the original pile foundation, and the cap is connected to the tie beam. Through the arrangement of the supplementary pile foundation and the connection of the cap, the load of the original pile foundation structure is effectively transferred and dispersed, thereby significantly improving the stability and safety of the bridge. Under such a structure, the original pile foundation structure no longer directly bears external force in the bridge pile foundation replacement structure, and the load it originally bears is transferred and dispersed to the supplementary pile foundation structure.

[0023] The present application also provides a bridge, comprising the bridge pile foundation underpinning structure in the above embodiment, and therefore, also has the advantages of the above bridge pile foundation underpinning structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the bridge pile foundation underpinning structure of the present application;

[0026] Figure 2 It is a schematic diagram of the top view of the structure of the bridge pile foundation underpinning structure of the present application.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Original pile foundation structure; 11. First original pile foundation;

[0029] 12. Second original pile foundation; 13. Tie beam;

[0030] 2. Additional pile foundation structure; 21. First additional pile foundation;

[0031] 22. Second additional pile foundation; 23. First cap;

[0032] 24. The second supporting platform. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] Unless otherwise defined, all professional terms used below have the same meaning as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.

[0038] The original pile foundation structure 1 usually includes original pile foundations arranged in pairs and tie beams 13 connected between the original pile foundations in pairs; the two major components jointly bear the main load of the bridge. However, due to the poor geological conditions in some areas, the bearing capacity of the original pile foundation cannot meet the design requirements. In order to solve this problem, Figure 1 and Figure 2 As shown, the present application provides a bridge pile foundation replacement structure. This replacement structure introduces an additional pile foundation structure 2 on the basis of retaining the original pile foundation structure 1. The additional pile foundation structure 2 can not only solve the problem of insufficient pile foundation bearing layer, but also solve the problems caused by geological caves. Specifically, the additional pile foundation structure 2 includes an additional pile foundation and a cap. The additional pile foundation is arranged on the outside of the original pile foundation, and the cap is connected to the tie beam 13. Through the arrangement of the additional pile foundation and the connection of the cap, the load of the original pile foundation structure 1 is effectively transferred and dispersed, thereby significantly improving the stability and safety of the bridge. Under such a structure, the original pile foundation structure 1 no longer directly bears external force in the bridge pile foundation replacement structure, and the load originally borne by it is transferred and dispersed to the additional pile foundation structure 2.

[0039] The bridge pile foundation replacement structure of the present application effectively solves the problem of insufficient pile foundation bearing capacity caused by geological problems by introducing the additional pile foundation structure 2 without changing the original bridge design. This structure is not only simple to construct and low in cost, but also can significantly improve the overall stability and safety of the bridge in practical applications.

[0040] In one embodiment of the present application, the original pile foundation includes a first original pile foundation 11 and a second original pile foundation 12, and a tie beam 13 is connected between the first original pile foundation 11 and the second original pile foundation 12. Taking actual construction as an example, the diameter of the first original pile foundation 11 and the second original pile foundation 12 are both 2.5 meters and the length is both 32 meters. In order to enhance the bearing capacity and stability of the entire pile foundation structure, an additional pile foundation structure 2 is added to the outside of the first original pile foundation 11 and the second original pile foundation 12.

[0041] In one embodiment of the present application, the supplementary pile foundation includes a first supplementary pile foundation 21 and a second supplementary pile foundation 22, and the first supplementary pile foundation 21 and the second supplementary pile foundation 22 are respectively arranged on both sides of the original pile foundation to achieve balanced support for the bridge load. Specifically, the first supplementary pile foundation 21 is located at one end of the pedestal, ensuring stable support for one side of the pedestal; and the second supplementary pile foundation 22 is located at the other end of the pedestal, providing solid support for the other side of the pedestal. In terms of size, the diameters of the first supplementary pile foundation 21 and the second supplementary pile foundation 22 are both set to 2.0 meters, which not only ensures the bearing capacity of the pile foundation, but also makes the construction more convenient. At the same time, the length of the two supplementary pile foundations is 24 meters, deep underground, ensuring the close combination of the pile foundation and the geological structure, thereby providing stronger support and stability. By reasonably arranging the supplementary pile foundations, the force distribution of the bridge is more uniform, thereby improving the overall bearing capacity and service life of the bridge.

[0042] In one embodiment of the present application, the tie beam 13 is substantially flush with the pedestal, and the tie beam 13 and the pedestal are arranged at an angle in the transverse plane. This arrangement not only enhances the stability of the structure, but also optimizes the mechanical transmission path. The setting of the angle can be flexibly adjusted according to actual engineering requirements and geological conditions. For example, different angles such as 30°, 45° or 90° can be selected. This angle arrangement is intended to better adapt to complex stress environments by adjusting the relative position between the tie beam 13 and the pedestal, thereby improving the bearing capacity and safety of the overall structure.

[0043] In one embodiment of the present application, the first supplementary pile foundation structure connected to the first original pile foundation 11 and the second supplementary pile foundation structure connected to the second original pile foundation 12 are arranged symmetrically to each other. This symmetrical arrangement not only enhances the overall stability of the bridge pile foundation structure, but also optimizes the load transfer path, so that the bridge can maintain balance and stability when subjected to various forces.

[0044] In one embodiment of the present application, the first pedestal 23 of the first supplementary pile foundation structure is located at the first end of the tie beam 13, and the second pedestal 24 of the second supplementary pile foundation structure is located at the second end of the tie beam 13. The first pedestal 23, the second pedestal 24 and the tie beam 13 are arranged in an H shape on the transverse plane. In order to meet the needs of actual engineering and the stability of the structure, the length of the first pedestal 23 and the second pedestal 24 are both set to 8.5m, the width is 3.5m, and the height is also 3.5m. Such a size design not only provides a wide load distribution area, so that the load of the bridge can be evenly dispersed, but also ensures the firmness and stability of the pedestal structure. In addition, the first pedestal 23 and the second pedestal 24 are both made of high-quality reinforced concrete structure, which has excellent bearing capacity and stability and can effectively bear and disperse the load of the bridge.

[0045] In one embodiment of the present application, the distance between the supplementary pile foundation and the original pile foundation shall not be less than 2.75 meters. This distance requirement is intended to ensure that the supplementary pile foundation can effectively support the original pile foundation while avoiding unnecessary interference with the original pile foundation. However, it should be emphasized that this distance is not fixed. In actual applications, we need to determine the actual distance between the supplementary pile foundation and the original pile foundation based on the geological conditions and the distribution of karst caves on site. Specifically, this distance needs to be large enough to ensure that the supplementary pile foundation can cross possible karst caves, thereby ensuring the stability and safety of the entire pile foundation structure.

[0046] In one embodiment of the present application, the original pile foundation structure 1 and the supplementary pile foundation structure 2 are an integrated structure, which effectively avoids potential safety hazards such as loosening or breakage at the connection between the two, thereby significantly improving the stability and safety of the entire pile foundation structure.

[0047] In one embodiment of the present application, the number of the additional pile foundation structures 2 is multiple, and each additional pile foundation structure 2 is staggered to optimize the structural layout and disperse the load, so as to ensure that the pile foundation structure can be evenly stressed when bearing the bridge load and improve the overall stability. The specific setting positions and numbers of the additional pile foundation structures 2 and the caps are not fixed, but are flexibly adjusted according to the detailed geological survey results and the actual load requirements of the bridge. This personalized design strategy can ensure that the pile foundation structure can perform at its best under different geological conditions and load conditions. In addition, in order to ensure that the entire structure can withstand the test of time, the additional pile foundation structures 2, the caps and the tie beams 13 need to be treated with corrosion protection and durability. These treatment measures include but are not limited to coating high-performance anti-corrosion coatings, using corrosion-resistant materials, strengthening the sealing of the structure, etc., aiming to improve the service life of the overall structure and ensure the safe and stable operation of the bridge.

[0048] The present application also provides a bridge, comprising the bridge pile foundation underpinning structure in the above embodiment, and therefore, also has the advantages of the above bridge pile foundation underpinning structure.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A bridge pile foundation underpinning structure, characterized in that: include: An original pile foundation structure (1) comprises original pile foundations and tie beams (13), wherein the original pile foundations are arranged in pairs, and the tie beams (13) are connected between the pairs of original pile foundations; The supplementary pile foundation structure (2) comprises a supplementary pile foundation and a cap, wherein the supplementary pile foundation is arranged outside the original pile foundation, the cap is connected to the tie beam (13), and the supplementary pile foundation is connected to the cap.

2. The bridge pile foundation underpinning structure according to claim 1, characterized in that: The original pile foundation comprises a first original pile foundation (11) and a second original pile foundation (12); the tie beam (13) is connected between the first original pile foundation (11) and the second original pile foundation (12); and the outer sides of the first original pile foundation (11) and the second original pile foundation (12) are both provided with supplementary pile foundation structures (2).

3. The bridge pile foundation underpinning structure according to claim 1, characterized in that: The supplementary pile foundation comprises a first supplementary pile foundation (21) and a second supplementary pile foundation (22), wherein the first supplementary pile foundation (21) and the second supplementary pile foundation (22) are respectively arranged on both sides of the original pile foundation, the first supplementary pile foundation (21) is located at the first end of the cap, and the second supplementary pile foundation (22) is located at the second end of the cap.

4. The bridge pile foundation underpinning structure according to claim 1, characterized in that: The tie beam (13) and the support platform are arranged at an angle on a transverse plane.

5. The bridge pile foundation underpinning structure according to claim 2, characterized in that: The first supplementary pile foundation structure connected to the first original pile foundation (11) and the second supplementary pile foundation structure connected to the second original pile foundation (12) are arranged symmetrically to each other.

6. The bridge pile foundation underpinning structure according to claim 5, characterized in that: The first cap (23) of the first supplementary pile foundation structure is located at the first end of the tie beam (13), and the second cap (24) of the second supplementary pile foundation structure is located at the second end of the tie beam (13). The first cap (23), the second cap (24) and the tie beam (13) are arranged in an H shape on a transverse plane.

7. The bridge pile foundation underpinning structure according to any one of claims 1 to 6, characterized in that: The distance between the supplementary pile foundation and the original pile foundation is not less than 2.75m.

8. The bridge pile foundation underpinning structure according to any one of claims 1 to 6, characterized in that: The original pile foundation structure (1) and the supplementary pile foundation structure (2) are an integrated structure.

9. The bridge pile foundation underpinning structure according to any one of claims 1 to 6, characterized in that: The number of the supplementary pile foundation structures (2) is plural, and the supplementary pile foundation structures (2) are arranged staggered with each other.

10. A bridge, characterized in that: It comprises the bridge pile foundation underpinning structure as claimed in any one of claims 1 to 9.

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