Multi-connected beam integrated local reinforcement foundation pit support structure

Abstract

The utility model relates to a foundation pit support technical field discloses a kind of multi-link beam integration local reinforcement foundation pit support structures, including foundation pit structure, rear row support pile group, pile and link beam. The rear row support pile group extends along the circumference of foundation pit structure. Pile is provided with multiple, multiple piles are distributed in the extension direction of rear row support pile group, and the inner wall of rear row support pile group away from foundation pit structure side. Link beam is set between rear row support pile group and pile. Wherein, rear row support pile group and pile all include multiple support pile body, the extension direction of support pile body is parallel with the depth direction of foundation pit structure, the extension direction of link beam is intersected with the extension direction of support pile body, and link beam is connected with the support pile body of rear row support pile group and the support pile body of pile respectively, and the utility model can solve the problem of construction space limited, and the problem of insufficient support capacity.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support technology, specifically to a multi-link beam integrated local reinforcement foundation pit support structure. Background Technology

[0002] In deep foundation pit engineering, when the surrounding environment is complex and strict control of the deformation of the support structure is required, pile bracing and pile anchoring support systems are often used. Pile bracing support systems consist of support piles combined with support members. This support structure exhibits relatively small deformation, but the support members compress the working space, extending the construction period and increasing project costs. Pile anchoring support systems consist of support piles combined with anchor rods. While pile anchoring avoids the shortcomings of pile bracing support, it inevitably causes disturbance to the surrounding environment and boundary encroachment issues. Considering the shortcomings of pile bracing and pile anchoring support structures, various unsupported support technologies have emerged in recent years, such as double-row piles and inclined-straight combined pile support structures. In underground foundation design, the pile cap often extends significantly beyond the structural exterior wall. In such cases, if the site construction space is limited, existing unsupported support structures have certain limitations.

[0003] Based on the above problems, there is an urgent need for a foundation pit support structure that can reduce the use of construction space, locally reinforce the foundation pit, adjust the stiffness of the support structure, and ultimately effectively control the deformation of the foundation pit. Utility Model Content

[0004] This utility model provides a multi-linked beam integrated local reinforcement foundation pit support structure to solve the problems of limited construction space and insufficient support capacity.

[0005] This utility model provides a multi-linked beam integrated local reinforcement foundation pit support structure, including: Foundation pit structure; The rear row of support piles extends circumferentially along the foundation pit structure; Multiple pile stacks are provided, and the multiple pile stacks are distributed at intervals along the extension direction of the rear row of support pile groups on the side of the rear row of support pile groups away from the inner wall of the foundation pit structure. A connecting beam is provided between the rear row of support piles and the pile stack; The rear row of support piles and the pile stack each include multiple support pile bodies. The extension direction of the support pile body is parallel to the depth direction of the foundation pit structure. The extension direction of the connecting beam intersects with the extension direction of the support pile body. The connecting beam is connected to the support pile body of the rear row of support piles and the support pile body of the pile stack, respectively.

[0006] Beneficial effects: By setting up rear support piles, pile piers, and multiple connecting beams, a multi-layered rigid connection overall force system is formed, which can realize layered force transmission and coordinated deformation control, improve the overall bending stiffness and spatial stability of the support structure, effectively reduce the deformation of the foundation pit, and adapt to complex geological conditions and strict deformation control requirements, thereby enhancing the adaptability and safety of the project.

[0007] In one optional embodiment, a plurality of connecting beams are provided between the rear row of support piles and the pile stack, and the plurality of connecting beams are spaced apart along the extension direction of the support pile body.

[0008] In one optional embodiment, among the plurality of connecting beams between the rear row of support piles and the pile stack, a pile top connecting beam is provided, and the pile top connecting beam is located at the pile top position of the rear row of support piles along the extension direction of the support pile body.

[0009] In one optional embodiment, reinforcing bars are provided at the connection point between the connecting beam and the support pile body.

[0010] In one alternative embodiment, the diameter of the support pile body of the pile stack is greater than or equal to the diameter of the support pile body of the rear row of support pile groups.

[0011] In one alternative implementation, it further includes: The capping beam is connected to one end of the rear row of support piles near the pit opening of the foundation pit structure, and the tops of multiple support piles in the rear row of support piles are all connected to the capping beam.

[0012] In one optional embodiment, the thickness of the cap beam and the connecting beam along the depth direction of the foundation pit structure is greater than or equal to the pile diameter of the support pile body.

[0013] In one optional embodiment, the width of the capping beam is greater than the diameter of the support pile body, and the two ends of the capping beam along its width direction are a first end face and a second end face, respectively. The support pile body is located between the first end face and the second end face, and there are gaps between the first end face and the second end face and the support pile body.

[0014] In one alternative embodiment, the support pile body extends underground along the depth direction of the foundation pit structure.

[0015] In one optional embodiment, the pile stack includes a plurality of support pile groups, which are distributed sequentially along the extension direction of the connecting beam. Each support pile group includes a plurality of support pile bodies, which are distributed sequentially along a direction perpendicular to the extension direction of the connecting beam. The multiple support pile bodies in the rear row of support pile groups are distributed sequentially along the circumference of the foundation pit structure. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a plan view of a multi-linked beam integrated partial reinforcement foundation pit support structure according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a multi-linked beam integrated local reinforcement foundation pit support structure according to an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Foundation pit structure; 2. Rear support pile group; 3. Pile stack; 4. Connecting beam; 5. Support pile body; 6. Crown beam. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0021] According to an embodiment of this application, an integrated local reinforcement foundation pit support structure with multiple connecting beams 4 is provided, including a foundation pit structure 1, a rear row of support piles 2, pile stacks 3, and connecting beams 4. The rear row of support piles 2 extends circumferentially along the foundation pit structure 1. Multiple pile stacks 3 are provided, and the multiple pile stacks 3 are distributed at intervals along the extension direction of the rear row of support piles 2 on the side of the rear row of support piles 2 away from the inner wall of the foundation pit structure 1. Connecting beams 4 are provided between the rear row of support piles 2 and the pile stacks 3. Both the rear row of support piles 2 and the pile stacks 3 include multiple support pile bodies 5, the extension direction of the support pile bodies 5 is parallel to the depth direction of the foundation pit structure 1, the extension direction of the connecting beams 4 intersects the extension direction of the support pile bodies 5, and the connecting beams 4 are connected to the support pile bodies 5 of the rear row of support piles 2 and the support pile bodies 5 of the pile stacks 3, respectively.

[0022] In this embodiment, by setting up the rear support pile group 2, pile stack 3, and multiple connecting beams 4, a multi-layer rigid connection overall force system is formed, which can realize layered force transmission and coordinated deformation control, improve the overall bending stiffness and spatial stability of the support structure, effectively reduce the deformation of the foundation pit, adapt to complex geological conditions and strict deformation control requirements, and enhance the adaptability and safety of the project.

[0023] In one embodiment, a plurality of connecting beams 4 are provided between the rear support pile group 2 and the pile stack 3, and the plurality of connecting beams 4 are distributed at intervals along the extension direction of the support pile body 5.

[0024] In this embodiment, by flexibly setting the number of connecting beams 4, multi-level force transmission and stiffness coordination can be achieved according to the depth of the foundation pit and the stress requirements, so that the support system can effectively share the load under different working conditions, optimize the internal force distribution, further improve the overall stability and deformation control capability of the structure, and enhance the flexibility and economy of the design.

[0025] In one embodiment, among the multiple connecting beams 4 between the rear row of support pile group 2 and the pile stack 3, a pile top connecting beam is provided, which is located at the pile top position of the rear row of support pile group 2 along the extension direction of the support pile body 5.

[0026] In this embodiment, the adjustable position of the connecting beam 4 allows it to be flexibly arranged according to the force distribution. When the connecting beam 4 is close to the top of the pile, it helps to reduce the bending moment of the pile and improve the stiffness of the upper support. When the connecting beam 4 is added at the bottom, it can equalize the displacement between piles and improve the overall deformation resistance, thereby achieving targeted reinforcement of the support performance at different depths and optimizing the structural response.

[0027] In one embodiment, reinforcing bars are provided at the connection point between the connecting beam 4 and the support pile body 5.

[0028] In this embodiment, pre-embedded steel bars and key reinforcements are carried out at the connection between the connecting beam 4 and the support pile, which can effectively ensure the mechanical synergy between the connecting beams 4, enhance the overall bending resistance and durability of the connection node, prevent local damage, and improve the integrity and reliability of the support system under complex stress conditions.

[0029] In one embodiment, the diameter of the support pile body 5 of the pile stack 3 is greater than or equal to the diameter of the support pile body 5 of the rear row support pile group 2.

[0030] In this embodiment, by ensuring that the diameter of the inner support piles of the pile stack 3 is not less than the diameter of the support pile body 5 of the rear support pile group 2, it is possible to ensure that the pile stack 3 has sufficient bearing capacity and rigidity, enhance its collaborative working performance with the rear piles, effectively share the earth pressure, and improve the overall stability and overturning resistance of the support system.

[0031] In one embodiment, a capping beam 6 is also included, which is connected to one end of the rear row of support pile group 2 near the pit opening of the foundation pit structure 1, and the tops of the pile bodies 5 of multiple support piles in the rear row of support pile group 2 are all connected to the capping beam 6.

[0032] In one embodiment, the thickness of the capping beam 6 and the connecting beam 4 along the depth direction of the foundation pit structure 1 is greater than or equal to the pile diameter of the support pile body 5.

[0033] In one embodiment, the width of the capping beam 6 is greater than the diameter of the support pile body 5, and the two ends of the capping beam 6 along its width direction are the first end face and the second end face, respectively. The support pile body 5 is located between the first end face and the second end face, and there is a gap between the first end face, the second end face and the support pile body 5.

[0034] In this embodiment, the height of the capping beam 6 and the connecting beam 4 is not less than the pile diameter, and the capping beam 6 extends at least 100mm beyond the edge of the support pile on both sides. This can enhance the rigidity and connection strength of the beam, ensure effective load transfer, improve the integrity and stability of the support structure, avoid local stress concentration, and extend the service life of the structure.

[0035] In one embodiment, the support pile body 5 extends underground along the depth direction of the foundation pit structure 1.

[0036] In this embodiment, the part of the support pile body 5 of the rear support pile group 2 located underground can make full use of the gaps between underground structures for local reinforcement, effectively save the working space in the pit, facilitate the connection with the main structure, and at the same time achieve targeted reinforcement of weak areas, improving space utilization efficiency and construction convenience.

[0037] In one embodiment, the pile pier 3 includes multiple support pile groups, which are sequentially distributed along the extension direction of the connecting beam 4. Each support pile group includes multiple support pile bodies 5, which are sequentially distributed along a direction perpendicular to the extension direction of the connecting beam 4. The multiple support pile bodies 5 in the rear row of support pile groups 2 are sequentially distributed along the circumference of the foundation pit structure 1.

[0038] In this embodiment, by flexibly determining the spacing, number, and spacing of the support piles within the pile stack 3, precise control of the foundation pit deformation can be achieved, enhancing the adaptability and economy of the support system and meeting customized needs under different engineering conditions.

[0039] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-linked beam integrated local reinforcement foundation pit support structure, characterized in that, include: Foundation pit structure (1); The rear support pile group (2) extends circumferentially along the foundation pit structure (1); Multiple pile stacks (3) are provided, and the multiple pile stacks (3) are distributed at intervals along the extension direction of the rear row of support pile group (2) on the side of the inner wall of the rear row of support pile group (2) away from the foundation pit structure (1). A connecting beam (4) is provided between the rear row of support pile group (2) and the pile stack (3); The rear row of support piles (2) and the pile stack (3) each include multiple support pile bodies (5). The extension direction of the support pile body (5) is parallel to the depth direction of the foundation pit structure (1). The extension direction of the connecting beam (4) intersects with the extension direction of the support pile body (5). The connecting beam (4) is connected to the support pile body (5) of the rear row of support piles (2) and the support pile body (5) of the pile stack (3) respectively.

2. The integrated local reinforcement foundation pit support structure for multiple connected beams according to claim 1, characterized in that, Multiple connecting beams (4) are provided between the rear row of support pile group (2) and the pile stack (3), and the multiple connecting beams (4) are distributed at intervals along the extension direction of the support pile body (5).

3. The integrated local reinforcement foundation pit support structure for multi-linked beams according to claim 2, characterized in that, Among the multiple connecting beams (4) between the rear row of support pile group (2) and the pile stack (3), a pile top connecting beam (4) is provided. The pile top connecting beam (4) is located at the pile top position of the rear row of support pile group (2) along the extension direction of the support pile body (5).

4. The integrated local reinforcement foundation pit support structure for multi-linked beams according to claim 3, characterized in that, The connection point between the connecting beam (4) and the support pile body (5) is reinforced with steel bars.

5. The integrated local reinforcement foundation pit support structure for multi-linked beams according to any one of claims 1 to 4, characterized in that, The diameter of the support pile body (5) of the pile stack (3) is greater than or equal to the diameter of the support pile body (5) of the rear row support pile group (2).

6. The integrated local reinforcement foundation pit support structure for multi-linked beams according to any one of claims 1 to 4, characterized in that, Also includes: The cap beam (6) is located at one end of the rear row of support pile group (2) near the pit opening of the foundation pit structure (1), and the tops of the multiple support pile bodies (5) in the rear row of support pile group (2) are all connected to the cap beam (6).

7. The integrated local reinforcement foundation pit support structure for multiple connected beams according to claim 6, characterized in that, The thickness of the cap beam (6) and the connecting beam (4) along the depth direction of the foundation pit structure (1) is greater than or equal to the pile diameter of the support pile body (5).

8. The integrated local reinforcement foundation pit support structure for multiple connected beams according to claim 7, characterized in that, The width of the capping beam (6) is greater than the diameter of the support pile body (5), and the two ends of the capping beam (6) along its width direction are the first end face and the second end face, respectively. The support pile body (5) is located between the first end face and the second end face, and there is a gap between the first end face and the second end face and the support pile body (5).

9. The integrated local reinforcement foundation pit support structure for multiple connected beams according to claim 1, characterized in that, The support pile body (5) extends underground along the depth direction of the foundation pit structure (1).

10. The integrated local reinforcement foundation pit support structure for multi-linked beams according to any one of claims 1 to 4, characterized in that, The pile stack (3) includes multiple support pile groups, which are distributed sequentially along the extension direction of the connecting beam (4). Each support pile group includes multiple support pile bodies (5), which are distributed sequentially along a direction perpendicular to the extension direction of the connecting beam (4). The multiple support pile bodies (5) in the rear row support pile group (2) are distributed sequentially along the circumference of the foundation pit structure (1).

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