Construction site foundation pit displacement protection device

By combining the design of side support plates, bottom plates, vertical beams, horizontal beams, support structures, and anchor structures, the problem of unstable connection in existing foundation pit support devices is solved, and multi-point support and enhanced stability of foundation pit support are achieved.

CN223838084UActive Publication Date: 2026-01-27SICHUAN ROAD & BRIDGE CONSTRUCTION GROUP CO LTD +1
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Patent Information

Application Number
CN202520195913.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-08
Publication Date
2026-01-27
Estimated Expiration
2035-02-08

AI Technical Summary

Technical Problem

In existing foundation pit support devices, the design of deep-buried rods and sidewall rods is insufficient, resulting in unstable connection between the support plate and the foundation pit sidewall, which cannot effectively resist the displacement of the foundation pit sidewall.

Method used

The design employs a combination of side support plates, bottom plates, vertical beams, horizontal beams, support structures, anchor structures, and bottom support structures. The vertical beams and horizontal beams form a common support, the side anchors and tie rods reinforce the connection of the pit sidewalls, and the bottom anchors are set at an angle to enhance the support at the bottom of the pit, forming a multi-point support system.

Benefits of technology

It improves the stability of the foundation pit support, enhances the connection strength between the foundation pit sidewall and the support plate, effectively resists foundation pit displacement, and improves the overall stability of the support structure.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a construction site foundation pit displacement protection device which comprises a side supporting plate and a bottom plate, one side of the side supporting plate abuts against the side wall of a foundation pit, and the bottom plate is rotationally connected to the lower end of the side supporting plate and located on the side away from the side wall of the foundation pit. Through connection of the first cross beam, the second cross beam and the supporting structure, displacement pressure of the side wall of the foundation pit is optimally borne by the side supporting plate, the bottom plate and the ground at the bottom of the foundation pit together instead of being borne by a traditional side supporting plate independently, and then the bottom anchor rod is arranged to be obliquely nailed into the ground at the bottom of the foundation pit. And the side supporting plates are matched with the pull rods capable of extending out to form an anchor pulling structure through the side anchor rods inserted into the soil of the side wall of the foundation pit, the volume amount of the whole structure penetrating into the soil is increased, the position state of the side supporting plates is stabilized, and the stability of the supporting function is enhanced.
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Description

Technical Field

[0001] This utility model relates to the field of construction technology, and in particular to a displacement protection device for construction site foundation pits. Background Technology

[0002] Foundation pit support refers to the measures taken to support, reinforce, and protect the sidewalls and surrounding environment of the foundation pit to ensure the safety of underground structure construction and the surrounding environment, and to prevent displacement of the foundation pit sidewalls. The quality of the foundation pit support structure determines the safety of the surrounding environment. Therefore, the stability of the foundation pit support is very important. In the existing technology, foundation pit support usually requires the addition of various structures to enhance the support stability during use. For example, a disclosed technology proposes a displacement-preventing foundation pit support. The key technical points of the solution are: a support plate that abuts against the sidewall of the foundation pit; several deeply embedded rods that are detachably connected to the bottom of the support plate and buried below the bottom surface of the foundation pit; several sidewall rods that pass through the support plate and enter the sidewall of the foundation pit that are detachably connected to the support plate; and a limiting plate that restricts the relative sliding of the sidewall rods and the support plate that is detachably connected to the support plate. This technical solution uses deeply embedded rods and side wall rods to stabilize and limit the support plate, preventing displacement of the support plate relative to the side wall of the pit, ensuring that the support plate can provide stable support for the pit, and reducing the impact of water flow and scouring on the pit.

[0003] However, the above-mentioned improved technologies have obvious drawbacks. First, the deep-buried rods are set up vertically, which does not play a significant supporting role. Second, the side wall rods are directly buried in the soil of the foundation pit side wall, which cannot form an effective connection between the foundation pit side wall and the support plate, and thus cannot play a stable supporting role. In summary, it is necessary to improve and optimize the structure of the foundation pit displacement protection device. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a construction site foundation pit displacement protection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a construction site foundation pit displacement protection device, comprising a side support plate and a bottom plate, wherein one side of the side support plate abuts against the side wall of the foundation pit, and the bottom plate is rotatably connected to the lower end of the side support plate and located on the side away from the side wall of the foundation pit, wherein multiple sets of vertical beams for strengthening the support are fixedly connected sequentially from front to back on the side of the side support plate away from the side wall of the foundation pit, and a first horizontal beam is fixedly connected to the side of the multiple sets of vertical beams away from the side support plate, and a second horizontal beam is fixedly connected to the upper wall of the bottom plate, wherein a support structure for transmitting the pressure received by the side support plate to the bottom plate is provided between the first horizontal beam and the second horizontal beam, and an anchor structure for strengthening the connection with the side wall of the foundation pit is provided on the side of the side support plate away from the vertical beam, and a bottom support structure for preventing slippage is provided on the lower wall of the bottom plate.

[0006] As a further description of the above technical solution:

[0007] The support structure includes an upper support rod and a lower support rod. The upper support rod and the lower support rod are rotatably connected to the first crossbeam and the second crossbeam respectively through a set of rotating seats. The end of the upper support rod away from the first crossbeam and the end of the lower support rod away from the second crossbeam are connected by an adjusting sleeve thread.

[0008] As a further description of the above technical solution:

[0009] The anchoring structure includes a side anchor rod, a tie rod, an adjusting rod, and an adjusting seat. The side anchor rod is installed through the inner wall of the side support plate. The end of the side anchor rod away from the side wall of the pit passes through the side support plate and abuts against the first crossbeam. The side anchor rod and the side support plate are limited by a protrusion on the outer wall of the side anchor rod. The end of the side anchor rod away from the first crossbeam is provided with a pointed tip. The side wall of the pointed tip is provided with a movable hole that communicates with the inside of the side anchor rod. The adjusting seat is threaded to the inner wall of the side anchor rod. The adjusting rod is rotatably connected to the end of the adjusting seat facing the pointed tip. The tie rod is rotatably connected to the end of the adjusting rod away from the adjusting seat through a pivot pin. The end of the tie rod away from the adjusting rod is slidably connected to the inner wall of the movable hole.

[0010] As a further description of the above technical solution:

[0011] The adjusting seat has a wrench hole at the end away from the adjusting rod for inserting and turning a wrench.

[0012] As a further description of the above technical solution:

[0013] The bottom support structure is a bottom anchor rod, which is fixedly connected to the lower wall of the second crossbeam. The end of the bottom anchor rod away from the second crossbeam passes through the bottom plate and extends downward toward the bottom plate.

[0014] As a further description of the above technical solution:

[0015] The angle between the outer wall of the bottom anchor rod away from the side support plate and the lower wall of the bottom plate is between forty and fifty degrees.

[0016] This utility model has the following beneficial effects:

[0017] 1. Compared with the existing technology, the construction site foundation pit displacement protection device, through the connection of the first crossbeam, the second crossbeam and the supporting structure, optimizes the displacement pressure of the foundation pit sidewall from the traditional side support plate to be borne by the side support plate, the bottom plate and the ground at the bottom of the foundation pit. Furthermore, the bottom anchor rod is set in an inclined position and nailed into the ground at the bottom of the foundation pit, which greatly increases the stability effect when resisting foundation pit displacement.

[0018] 2. Compared with existing technologies, this construction site foundation pit displacement protection device uses side anchors inserted into the soil of the foundation pit side wall to form a tie rod that can extend to form an anchor structure, which increases the volume of the entire structure penetrating into the soil, stabilizes the position of the side anchors, and enhances the stability of the support function. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a construction site foundation pit displacement protection device proposed in this utility model;

[0020] Figure 2 This is a partial sectional view of the internal structure of the side anchor rod of a construction site foundation pit displacement protection device proposed in this utility model;

[0021] Figure 3 This is a partial cross-sectional view of the bottom plate and bottom anchor rod connection structure of a construction site foundation pit displacement protection device proposed in this utility model.

[0022] Legend:

[0023] 1. Side support plate; 2. Base plate; 3. Vertical beam; 4. First crossbeam; 5. Second crossbeam; 6. Upper support rod; 7. Lower support rod; 8. Adjusting sleeve; 9. Side anchor rod; 10. Tie rod; 11. Bottom anchor rod; 12. Movable hole; 13. Adjusting rod; 14. Turning pin; 15. Adjusting seat; 16. Wrench hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1 to 3 The present invention provides a construction site foundation pit displacement protection device, including a side support plate 1 and a bottom plate 2. One side of the side support plate 1 abuts against the side wall of the foundation pit. The bottom plate 2 is rotatably connected to the lower end of the side support plate 1 and located on the side away from the side wall of the foundation pit. Multiple sets of vertical beams 3 for strengthening the support strength are fixedly connected from front to back on the side of the side support plate 1 away from the side wall of the foundation pit. The structural strength of the side support plate 1 is improved by the multiple sets of vertical beams 3.

[0026] A first crossbeam 4 is fixedly connected to the side of the multiple vertical beams 3 away from the side support plate 1, and a second crossbeam 5 is fixedly connected to the upper wall of the bottom plate 2. A support structure is provided between the first crossbeam 4 and the second crossbeam 5 to transfer the pressure received by the side support plate 1 to the bottom plate 2. The support structure includes an upper support rod 6 and a lower support rod 7. The upper support rod 6 and the lower support rod 7 are rotatably connected to the first crossbeam 4 and the second crossbeam 5 respectively through a set of rotating seats. The end of the upper support rod 6 away from the first crossbeam 4 and the end of the lower support rod 7 away from the second crossbeam 5 are threadedly connected through an adjusting sleeve 8. The displacement pressure of the pit side wall received by the side support plate 1 is transferred to the bottom plate 2 and the ground at the bottom of the pit through the upper support rod 6 and the lower support rod 7, forming a common support function.

[0027] A tie-anchor structure is provided on the side of the side support plate 1 away from the vertical beam 3 to strengthen the connection with the side wall of the foundation pit. The tie-anchor structure includes a side anchor rod 9, a tie rod 10, an adjusting rod 13 and an adjusting seat 15. The side anchor rod 9 is installed through the inner wall of the side support plate 1. The end of the side anchor rod 9 away from the side wall of the foundation pit passes through the side support plate 1 and abuts against the first cross beam 4. The side anchor rod 9 and the side support plate 1 are limited by the protrusion on the outer wall of the side anchor rod 9. The end of the side anchor rod 9 away from the first cross beam 4 is provided with a pointed end. During construction, the side anchor rod 9 is driven into the side wall of the foundation pit that abuts against the side support plate 1 after passing through the side support plate 1. The pointed end is to facilitate the side anchor rod 9 to enter the soil layer.

[0028] The pointed sidewall is provided with a movable hole 12 that communicates with the inside of the side anchor rod 9. The adjusting seat 15 is threadedly connected to the inner sidewall of the side anchor rod 9. The adjusting rod 13 is rotatably connected to the end of the adjusting seat 15 facing the pointed end. The pull rod 10 is rotatably connected to the end of the adjusting rod 13 away from the adjusting seat 15 through a pivot pin 14. The end of the pull rod 10 away from the adjusting rod 13 is slidably connected to the inner sidewall of the movable hole 12. The end of the adjusting seat 15 away from the adjusting rod 13 is provided with a wrench hole 16 for inserting a wrench and turning it. By inserting a wrench through the wrench hole 16, the adjusting seat 15 can be turned. Through the threaded connection between the adjusting seat 15 and the inner sidewall of the side anchor rod 9, the adjusting seat 15 moves closer to or away from the sidewall of the foundation pit when it rotates forward and backward, thereby driving the pull rod 10 to extend or retract from the movable hole 12. When the pull rod 10 extends from the movable hole 12, it penetrates into the soil layer, so that the side support plate 1 and the sidewall of the foundation pit form a tight connection, which greatly stabilizes the position of the side support plate 1.

[0029] The lower wall of the base plate 2 is provided with a bottom support structure for anti-slip purposes. The bottom support structure is a bottom anchor rod 11, which is fixedly connected to the lower wall of the second crossbeam 5. The end of the bottom anchor rod 11 away from the second crossbeam 5 passes through the base plate 2 and extends downward toward the bottom plate 2. The angle between the outer wall of the bottom anchor rod 11 away from the side support plate 1 and the lower wall of the base plate 2 is between 40 and 50 degrees. By setting the bottom anchor rod 11 in an inclined state, the pressure generated on the device when the side wall of the foundation pit is displaced can be resisted by the ground soil layer at the bottom of the foundation pit, thus avoiding the overall displacement of the device.

[0030] Working principle: The side support plate 1 abuts against the side wall of the foundation pit, and the bottom plate 2 abuts against the ground at the bottom of the foundation pit. Multiple sets of vertical beams 3 improve the structural strength of the side support plate 1. The displacement pressure from the side wall of the foundation pit on the side support plate 1 is transferred to the bottom plate 2 and the ground at the bottom of the foundation pit through the upper support rod 6 and the lower support rod 7, forming a joint support effect. During construction, the side anchor rod 9 is driven through the side support plate 1 and into the foundation pit side wall that abuts against the side support plate 1. The pointed end is to facilitate the side anchor rod 9 to enter the soil layer. A wrench is inserted through the wrench hole 16, and the adjusting seat 15 can be turned. The adjusting seat 15 is connected to the inner side wall of the side anchor rod 9 through the threaded connection. When the adjusting seat 15 rotates forward and backward, it moves closer to or further away from the side wall of the pit, thereby causing the tie rod 10 to extend or retract from the movable hole 12. When the tie rod 10 extends from the movable hole 12, it penetrates into the soil layer, making the side support plate 1 and the side wall of the pit closely connected, which greatly stabilizes the position of the side support plate 1. The angle between the outer wall of the bottom anchor rod 11 away from the side support plate 1 and the lower wall of the bottom plate 2 is between forty and fifty degrees. By setting the bottom anchor rod 11 in an inclined state, the ground soil layer at the bottom of the pit can resist the pressure generated on the device when the side wall of the pit moves, thus avoiding the overall displacement of the device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A construction site foundation pit displacement protection device, comprising a side support plate (1) and a bottom plate (2), wherein one side of the side support plate (1) abuts against the side wall of the foundation pit, and the bottom plate (2) is rotatably connected to the lower end of the side support plate (1) and located on the side away from the side wall of the foundation pit, characterized in that: The side support plate (1) is fixedly connected from front to back to a plurality of vertical beams (3) for strengthening the support strength on the side away from the pit sidewall. The plurality of vertical beams (3) are fixedly connected to a first horizontal beam (4) on the side away from the side support plate (1). The upper wall of the bottom plate (2) is fixedly connected to a second horizontal beam (5). A support structure is provided between the first horizontal beam (4) and the second horizontal beam (5) to transfer the pressure received by the side support plate (1) to the bottom plate (2). The side support plate (1) is provided with an anchor structure for strengthening the connection with the pit sidewall on the side away from the vertical beam (3). The lower wall of the bottom plate (2) is provided with a bottom support structure for preventing slippage.

2. The construction site foundation pit displacement protection device according to claim 1, characterized in that: The support structure includes an upper support rod (6) and a lower support rod (7). The upper support rod (6) and the lower support rod (7) are rotatably connected to the first crossbeam (4) and the second crossbeam (5) respectively through a set of rotating seats. The end of the upper support rod (6) away from the first crossbeam (4) and the end of the lower support rod (7) away from the second crossbeam (5) are threadedly connected through an adjusting sleeve (8).

3. The construction site foundation pit displacement protection device according to claim 2, characterized in that: The anchoring structure includes a side anchor rod (9), a tie rod (10), an adjusting rod (13), and an adjusting seat (15). The side anchor rod (9) is installed through the inner wall of the side support plate (1). The end of the side anchor rod (9) away from the side wall of the pit passes through the side support plate (1) and abuts against the first crossbeam (4). The side anchor rod (9) and the side support plate (1) are limited by a protrusion on the outer wall of the side anchor rod (9). The end of the side anchor rod (9) away from the first crossbeam (4) is provided with a pointed tip. The pointed sidewall is provided with a movable hole (12) that communicates with the inside of the side anchor rod (9). The adjusting seat (15) is threadedly connected to the inner sidewall of the side anchor rod (9). The adjusting rod (13) is rotatably connected to the end of the adjusting seat (15) facing the pointed end. The pull rod (10) is rotatably connected to the end of the adjusting rod (13) away from the adjusting seat (15) through a pivot pin (14). The end of the pull rod (10) away from the adjusting rod (13) is slidably connected to the inner sidewall of the movable hole (12).

4. The construction site foundation pit displacement protection device according to claim 3, characterized in that: The adjusting seat (15) has a wrench hole (16) at the end away from the adjusting rod (13) for inserting and turning a wrench.

5. A construction site foundation pit displacement protection device according to claim 4, characterized in that: The bottom support structure is a bottom anchor rod (11), which is fixedly connected to the lower wall of the second crossbeam (5). The end of the bottom anchor rod (11) away from the second crossbeam (5) passes through the bottom plate (2) and extends downward toward the bottom plate (2).

6. A construction site foundation pit displacement protection device according to claim 5, characterized in that: The angle between the outer wall of the bottom anchor rod (11) away from the side support plate (1) and the lower wall of the bottom plate (2) is between forty and fifty degrees.