A civil foundation pit supporting device

Abstract

The utility model provides a kind of civil engineering foundation pit supporting device, including four groups of evenly distributed support column, two two support column between being connected with linkage mechanism;The bottom end of the support column is equipped with bottom plate, the side of the support column is equipped with sliding slot, the sliding slot is equipped with slider matched with it, the bottom end of the slider is equipped with anchor column for anchoring, the bottom plate is equipped with through-hole for the anchor column to penetrate, the inside of the anchor column is equipped with reinforcing mechanism for extending outward.The utility model has the beneficial effects as follows, by positive and negative toothed rod drive cross movable rod to unfold, drive anchor rod to stretch out from hole and insert surrounding soil, form multidirectional three-dimensional anchoring structure, greatly enhance the binding force of device and soil, effectively resist lateral pressure of foundation pit sidewall, avoid anchor column to slip or dump, applicable to soft soil, deep foundation pit and other complex geological conditions.

Description

Technical Field

[0001] This utility model is a support device for civil engineering foundation pits, belonging to the field of civil engineering foundation pit construction technology. Background Technology

[0002] In the construction of foundation pits in civil engineering projects, foundation pit support devices are key equipment to ensure the stability of the foundation pit sidewalls and prevent collapse. Their performance is directly related to construction safety and project quality.

[0003] Existing foundation pit support devices are insufficient to meet the needs of complex construction scenarios. Most devices rely solely on a single anchor inserted into the soil for fixation, resulting in limited anchoring depth and lateral reinforcement. In soft soil or deep foundation pits, they are prone to slippage and toppling, failing to withstand lateral pressure from the pit walls. Furthermore, their support coordination is poor, with support columns often being independent supports or simply connected laterally, leading to uneven force distribution and localized stress concentration, which in turn causes deformation of the support structure. The lack of expandable lateral reinforcement structures makes them unsuitable for construction requirements with varying soil hardness, pit depth, and dimensions. Localized support failure can easily lead to overall structural instability, posing a significant threat to construction safety. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a support device for civil engineering foundation pits.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A civil engineering foundation pit support device includes four sets of evenly distributed support columns, with a linkage mechanism connecting each pair of support columns. The support column has a base plate at its bottom end, a sliding groove on one side of the support column, a matching slider in the sliding groove, an anchor for anchoring at the bottom end of the slider, a through hole for the anchor to pass through on the base plate, and a reinforcement mechanism for outward extension inside the anchor. The linkage mechanism includes an inclined brace, a connecting plate that is movably connected to one side of the inclined brace, and connecting rods that are cross-shaped with the inclined brace at the two corners of the connecting plate. The connecting rods are movably connected to the connecting plate and the support column respectively through a first pin, and the inclined brace is movably connected to the support column through a second pin.

[0006] Preferably, the reinforcement mechanism includes a bushing vertically arranged inside the anchor post, a through-type threaded rod movably connected inside the bushing, the anchor post having a hollow structure, a fixed sleeve one and a fixed sleeve two symmetrically arranged on the bushing, and a matching movable sleeve one and movable sleeve two threadedly fitted onto the threaded rod at both ends of the bushing.

[0007] Preferably, movable rod 1 and movable rod 2 are movably connected to the fixed sleeve 1 and the movable sleeve 1 in a cross arrangement, and movable rod 3 and movable rod 4 are movably connected to the movable sleeve 2 and the fixed sleeve 2 in a cross arrangement. The other ends of movable rod 1 and movable rod 2 and the other ends of movable rod 3 and movable rod 4 are respectively provided with movably connected connecting members, and the connecting members are provided with stroke holes for movable rod 1 and movable rod 4 to move.

[0008] Preferably, the intersection of the movable rod one and the movable rod two, as well as the intersection of the movable rod three and the movable rod four, are each provided with a fixed shaft that is movably connected.

[0009] Preferably, the connector has symmetrically arranged anchor rods extending beyond the anchor post on the side away from the anchor post.

[0010] Preferably, the anchor post has a hole for the anchor rod to move outward.

[0011] Preferably, the top end of the positive and negative threaded rod extends outside the support column and movably passes through the rotating wheel of the slider.

[0012] Preferably, the base plate is provided with bolts for fixing.

[0013] The beneficial effects of this utility model are: The two support columns are connected by diagonal braces and connecting rods to form a cross-shaped linkage structure. Flexible connection is achieved using pins, which quickly disperses the local pressure transmitted from the pit sidewall to the four support columns and the entire support system, preventing structural deformation caused by localized stress concentration and improving overall support rigidity and stability. The cross-moving rods are extended by positive and negative threaded rods, causing the anchor rods to extend from the holes and insert into the surrounding soil, forming a multi-directional three-dimensional anchoring structure. This significantly enhances the bonding force between the device and the soil, effectively resisting lateral pressure from the pit sidewall and preventing anchor slippage or tilting. It is suitable for complex geological conditions such as soft soil and deep pits. The sliding cooperation between the slider and the support column's groove allows for precise adjustment of the anchor rod's insertion depth according to the pit depth and soil conditions. The anchor rods in the reinforcement mechanism can be extended and retracted via positive and negative threaded rods to adapt to different soil hardness and reinforcement needs. It can meet the support requirements of pits of different sizes without replacing parts, demonstrating strong versatility. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of a civil engineering foundation pit support device according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the reinforcement mechanism in a civil engineering foundation pit support device according to the present invention; Figure 4 This is a cross-sectional view of the anchor column in a civil engineering foundation pit support device according to the present invention.

[0016] In the diagram, 1. Support column; 2. Base plate; 3. Slide groove; 4. Slider; 5. Anchor column; 6. Through hole; 7. Diagonal brace; 8. Connecting plate; 9. Connecting rod; 10. Bushing; 11. Threaded rod; 12. Fixed sleeve one; 13. Fixed sleeve two; 14. Movable sleeve one; 15. Movable sleeve two; 16. Movable rod one; 17. Movable rod two; 18. Movable rod three; 19. Movable rod four; 20. Connector; 21. Fixed shaft; 22. Anchor rod; 23. Hole; 24. Rotary wheel; 25. Stroke hole. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-4 This utility model provides a technical solution for a civil engineering foundation pit support device, including four sets of evenly distributed support columns 1, and a linkage mechanism connecting each pair of support columns 1. The bottom end of the support column 1 is provided with a base plate 2, and a sliding groove 3 is provided on one side of the support column 1. A matching slider 4 is provided in the sliding groove 3. The bottom end of the slider 4 is provided with an anchor 5 for anchoring. A through hole 6 is provided on the base plate 2 for the anchor 5 to pass through. The anchor 5 is provided with a reinforcement mechanism for outward extension inside. The linkage mechanism includes an inclined brace 7, a connecting plate 8 that is movably connected to one side of the inclined brace 7, and connecting rods 9 that are arranged in a cross shape with the inclined brace 7 at the two corners of the connecting plate 8. The connecting rods 9 are movably connected to the connecting plate 8 and the support column 1 respectively through a first pin, and the inclined brace 7 is movably connected to the support column 1 through a second pin.

[0019] Please see Figure 1-4The reinforcement mechanism includes a bushing 10 vertically arranged inside the anchor post 5. A through-hole threaded rod 11 is movably connected inside the bushing 10. The anchor post 5 has a hollow structure. The bushing 10 is provided with a fixed sleeve 12 and a fixed sleeve 2 symmetrically arranged. The threaded rod 11 is threaded with a matching movable sleeve 14 and a movable sleeve 2 15 at both ends of the bushing 10. Movable rod 16 and movable rod 2 17 arranged in a cross configuration are movably connected to the fixed sleeve 12 and the movable sleeve 14. Movable rod 3 18 and movable rod 4 19 arranged in a cross configuration are movably connected to the movable sleeve 2 15 and the fixed sleeve 2 13. The other ends of the movable rod 16 and the movable rod 2 17, as well as the other ends of the movable rod 3 18 and the movable rod 4 19, are respectively provided with a movably connected connector 20. The connector 20 has a stroke hole 25 for the movable rod 16 and the movable rod 4 19 to move.

[0020] Please see Figure 1-4 The intersection of the first movable rod 16 and the second movable rod 17, and the intersection of the third movable rod 18 and the fourth movable rod 19, are each provided with a fixed shaft 21 for movable connection. The connecting member 20 is provided with symmetrical anchor rods 22 extending outside the anchor post 5 on the side away from the anchor post 5. The anchor post 5 is provided with a hole 23 for the anchor rod 22 to move outward. The top end of the positive and negative threaded rod 11 extends outside the support column 1 and movably passes through the rotating wheel 24 of the slider 4. The base plate 2 is provided with bolts for fixing.

[0021] In use, four sets of support columns 1 are evenly distributed around the bottom of the foundation pit to form a square support frame, providing all-round support for the side wall of the foundation pit. The sliding groove 3 on one side of the support column 1 is adapted to the sliding block 4. The bottom end of the sliding block 4 is fixed to the anchor column 5, and the anchor column 5 can be inserted into the soil through the through hole 6. During construction, by sliding the position of the sliding block 4 in the sliding groove 3, the depth of the anchor column 5 inserted into the soil can be precisely adjusted to meet the needs of different foundation pit depths and soil bearing capacity. Then, the rotating wheel 24 is rotated to drive the positive and negative threaded rod 11 through the bushing 10 to rotate. Since the threads at both ends of the positive and negative threaded screw 11 turn in opposite directions, the movable sleeve 14 and movable sleeve 2 15 connected by its threads will move relative to or towards each other along the screw. The movable rods 16 and 17, which are hinged between the movable sleeve 14 and the fixed sleeve 12, and the movable rods 18 and 19, which are hinged between the movable sleeve 13 and the fixed sleeve 15, are all arranged crosswise and connected movably through the fixed shaft 21. When the movable sleeve moves, the cross movable rods will expand or retract synchronously. The other end of the movable rod is hinged to the connector 20, and the stroke hole 25 on the connector 20 provides the movable rod with movement space. When the movable rod is extended, it will push the connector 20 to move outward of the anchor post 5, thereby causing the anchor rod 22 on the connector to extend out of the hole 23 on the side wall of the anchor post 5 and insert into the surrounding soil, forming a multi-directional three-dimensional anchoring structure, enhancing the bonding force between the anchor post and the soil, and achieving stable reinforcement.

[0022] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A civil engineering foundation pit support device, characterized in that, It includes four sets of evenly distributed support columns (1), and a linkage mechanism is connected between each pair of support columns (1); The bottom end of the support column (1) is provided with a base plate (2), and a sliding groove (3) is provided on one side of the support column (1). A matching slider (4) is provided in the sliding groove (3). An anchor (5) for anchoring is provided at the bottom end of the slider (4). A through hole (6) is provided on the base plate (2) for the anchor (5) to pass through. A reinforcement mechanism for outward extension is provided inside the anchor (5). The linkage mechanism includes an inclined brace (7) with a connecting plate (8) on one side of the inclined brace (7) and connecting rods (9) arranged in a cross shape with the inclined brace (7) at the two corners of the connecting plate (8). The connecting rods (9) are movably connected to the connecting plate (8) and the support column (1) respectively by a first pin, and the inclined brace (7) is movably connected to the support column (1) by a second pin.

2. The civil engineering foundation pit support device according to claim 1, characterized in that, The reinforcement mechanism includes a bushing (10) vertically arranged inside the anchor (5), and a through-connected positive and negative threaded rod (11) is movably connected inside the bushing (10). The anchor (5) has a hollow structure. The bushing (10) is provided with a fixed sleeve one (12) and a fixed sleeve two (13) symmetrically arranged. The positive and negative threaded rod (11) is threaded with a matching movable sleeve one (14) and movable sleeve two (15) at both ends of the bushing (10).

3. The civil engineering foundation pit support device according to claim 2, characterized in that, The fixed sleeve 1 (12) and the movable sleeve 1 (14) are movably connected by movable rod 1 (16) and movable rod 2 (17) arranged in a cross configuration. The movable sleeve 2 (15) and the fixed sleeve 2 (13) are movably connected by movable rod 3 (18) and movable rod 4 (19) arranged in a cross configuration. The other ends of movable rod 1 (16) and movable rod 2 (17) and the other ends of movable rod 3 (18) and movable rod 4 (19) are respectively provided with movably connected connectors (20). The connectors (20) are provided with stroke holes (25) for the movable rod 1 (16) and movable rod 4 (19) to move.

4. A civil engineering foundation pit support device according to claim 3, characterized in that, Fixed shafts (21) are provided at the intersections of movable rod one (16) and movable rod two (17) and at the intersections of movable rod three (18) and movable rod four (19).

5. A civil engineering foundation pit support device according to claim 4, characterized in that, The connector (20) has symmetrically arranged anchor rods (22) extending outside the anchor post (5) on the side away from the anchor post (5).

6. A civil engineering foundation pit support device according to claim 5, characterized in that, The anchor (5) has a hole (23) for the anchor rod (22) to move outward.

7. A civil engineering foundation pit support device according to claim 6, characterized in that, The top end of the positive and negative threaded rod (11) extends to the outside of the support column (1) and moves through the wheel (24) of the slider (4).

8. A civil engineering foundation pit support device according to claim 7, characterized in that, The base plate (2) is provided with bolts for fixing.

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