Constraint device for preventing upper portion of foundation pit fender post from inclining outwards

Abstract

The utility model discloses a restraining device for preventing the upper portion of a foundation pit fender post from inclining outwards, and belongs to the technical field of foundation pit engineering. The structure comprises a fender post, an enclosing purlin is arranged on the inner side face of the fender post, and a counter-pull supporting structure is arranged on the outer side face of the fender post. Limiting restraining blocks are arranged in the enclosing purlins, supporting blocks are arranged outside the enclosing purlins, connecting plates are arranged on the upper surfaces of the supporting blocks and the limiting restraining blocks, and steel supporting systems are arranged at the ends of the supporting blocks. The fender posts, the enclosing purlins, the supporting blocks and the steel supporting systems are jointly connected into a whole through the cooperation of the limiting restraining blocks and the connecting plates, an integral stress system is constructed, when the lower portions of the fender posts move towards the interior of a foundation pit, the steel supporting system on the uppermost layer provides reverse tension restraint, the horizontal displacement of the pile tops is controlled within a stable range, and the stability of the foundation pit is improved. And the upper part of the fender post is thoroughly prevented from inclining outwards and losing stability.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit engineering technology, and more specifically, to a restraint device for preventing the upper part of the foundation pit retaining piles from tilting outward. Background Technology

[0002] Excavation pit support refers to temporary retaining, reinforcement, and groundwater control measures taken to ensure the safety of underground structure construction and the stability of the surrounding environment. Excavation pit sidewall support often employs retaining pile structures. As the excavation depth increases, the active earth pressure generated by the soil beneath the retaining piles gradually increases. When this earth pressure exceeds the compressive bearing capacity of the retaining piles, it will cause the lower part of the retaining piles to deform and displace into the pit in the maximum bending moment zone. In severe cases, this may lead to outward tilting and instability failure of the pile top. Utility Model Content

[0003] 1. Technical problem to be solved by the utility model

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a restraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward. This invention uses a limiting restraint block in conjunction with a connecting plate to connect the retaining pile, waler, support block and steel support system into a whole. That is, the retaining pile, waler and support block and steel support system are constructed into an integrated force-bearing system. Therefore, when the lower part of the retaining pile is subjected to soil pressure and deforms into the foundation pit in the maximum bending moment zone, the uppermost steel support system transmits the reverse tension, so that the horizontal displacement of the pile top is controlled within a stable range, completely eliminating the risk of outward tilting and instability, and significantly improving the overall stability and safety redundancy of the foundation pit support system.

[0005] 2. Technical Solution

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] This utility model provides a restraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward, including the retaining pile, the inner side of the retaining pile is provided with a waler, and the outer side of the retaining pile is provided with a tension support structure.

[0008] The surface of the aforementioned anti-tension support structure is also equipped with anti-tension screws, and both ends of the anti-tension screws are provided with fastening bolts. One end of the anti-tension screw passes through the anti-tension support structure and is fixed to the anti-tension support structure by fastening bolts, and the other end of the anti-tension screw passes through the waler and is fixed to the waler by fastening bolts.

[0009] The waler is provided with a limit constraint block inside and a support block outside. The upper surfaces of the support block and the limit constraint block are provided with a connecting plate. The support block and the limit constraint block are respectively assembled with the connecting plate by bolts. The end of the support block is provided with a steel support system.

[0010] Furthermore, the limiting constraint blocks are provided in two sets, which are respectively installed on the upper and lower sides of the waler web, and each set of limiting constraint blocks has a corresponding connecting plate on its surface.

[0011] Furthermore, the steel support system includes steel beams and jacks, with the jacks installed between the steel beams and the support blocks.

[0012] Furthermore, a protective cover is provided on the outside of the jack, and the two ends of the protective cover are respectively assembled with the steel beam and the support block.

[0013] Furthermore, the bottom of the waler is provided with a supporting bracket, one side of which is fixed to the retaining pile, and the upper end of which is fixed to the waler.

[0014] Furthermore, a first limiting block is provided on the upper surface of the supporting bracket, a second limiting block is provided on the inner side of the retaining pile, the waler is placed on the upper surface of the supporting bracket, the inner side of the waler contacts the first limiting block, and the outer side of the waler contacts the second limiting block.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] This utility model uses a limiting constraint block in conjunction with a connecting plate to connect the retaining piles, walers, support blocks, and steel support system into a whole. That is, the retaining piles, walers, support blocks, and steel support system are constructed into an integrated force-bearing system. Therefore, when the lower part of the retaining pile is subjected to soil pressure and deforms into the pit in the maximum bending moment zone, the uppermost steel support system transmits the reverse tensile force, so that the horizontal displacement of the pile top is controlled within a stable range, completely eliminating the risk of outward instability and significantly improving the overall stability and safety redundancy of the pit support system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is a rendering of the bracket installation effect of this utility model;

[0021] Figure 4 This is a diagram showing the connection effect on both sides of the connecting plate of this utility model;

[0022] Figure 5 This is a top view of the limiting constraint block of this utility model;

[0023] Figure 6This is an installation effect diagram of the steel support system of this utility model;

[0024] Figure 7 This is a schematic diagram of the waler structure of this utility model;

[0025] Figure 8 This is a schematic diagram of the anti-pull screw structure of this utility model;

[0026] Figure 9 This is a schematic diagram of the connecting plate structure of this utility model;

[0027] Figure 10 This is a schematic diagram of the protective cover structure of this utility model;

[0028] Figure 11 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0029] Figure 12 This is a partial structural diagram of Embodiment 2 of the present invention;

[0030] Figure 13 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model;

[0031] Figure 14 This is a partial structural diagram of Embodiment 3 of the present invention;

[0032] Figure 15 This is a schematic diagram of the overall structure of Embodiment 4 of this utility model;

[0033] Figure 16 This is a partial structural schematic diagram of Embodiment 4 of the present invention;

[0034] Figure 17 This is a schematic diagram of the connection structure at both ends of the connecting plate in Embodiment 4 of this utility model.

[0035] In the diagram: 1. Retaining pile; 2. Waler; 3. Anti-tension support structure; 4. Anti-tension bolt; 401. Fastening bolt; 5. Limiting restraint block; 6. Support block; 7. Connecting plate; 8. Steel support system; 801. Steel beam; 802. Jack; 803. Protective cover; 9. Support bracket; 10. First limiting block; 11. Second limiting block. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Example 1

[0038] from Figure 1-3As can be seen, a constraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward in this embodiment includes a retaining pile 1, which is a concrete pile. A waler 2 is provided on the inner side of the retaining pile 1. A supporting bracket 9 is provided at the bottom of the waler 2. One side of the supporting bracket 9 is fixed to the retaining pile 1, and the upper end face of the supporting bracket 9 is fixed to the waler 2. A counter-tension support structure 3 is provided on the outer side of the retaining pile 1.

[0039] from Figure 4-10 It can be seen that the surface of the anti-tension support structure 3 is also equipped with anti-tension screws 4, from Figure 8 It can be seen that both ends of the anti-pull screw 4 are equipped with fastening bolts 401. One end of the anti-pull screw 4 passes through the anti-pull support structure 3 and is fixed to the anti-pull support structure 3 by fastening bolts 401. The other end of the anti-pull screw 4 passes through the waler 2 and is fixed to the waler 2 by fastening bolts 401.

[0040] The anti-tension support structure 3 works in conjunction with the anti-tension screw 4 to form a whole force-bearing structure with multiple sets of retaining piles 1 and walers 2. When the retaining piles 1 are subjected to thrust applied from the inside of the walers 2, the retaining piles 1 will not overturn on their own, but will be restrained by the anti-tension support structure 3.

[0041] The waler 2 has a limit constraint block 5 inside and a support block 6 outside. The upper surfaces of the support block 6 and the limit constraint block 5 are connected by a connecting plate 7. The support block 6 and the limit constraint block 5 are respectively assembled to the connecting plate 7 by bolts. The end of the support block 6 is provided with a steel support system 8.

[0042] from Figure 4 It can be seen that there are two sets of limiting constraint blocks 5, which are installed on the upper and lower sides of the web of the waler 2 respectively, and each set of limiting constraint blocks 5 has a corresponding connecting plate 7 on its surface.

[0043] from Figure 5 It can be seen that the limiting constraint block 5 has a hole on its side, and the limiting constraint block 5 is assembled with the waler 2 by passing a bolt through the hole on the side of the limiting constraint block 5.

[0044] from Figure 6 It can be seen that the steel support system 8 includes a steel beam 801 and a jack 802, with the jack 802 installed between the steel beam 801 and the support block 6.

[0045] The outer side of the jack 802 is equipped with a protective cover 803, the structure of which is as follows: Figure 10 As shown, the two ends of the protective cover 803 are respectively assembled with the steel beam 801 and the support block 6.

[0046] Example 2

[0047] from Figure 11-12As can be seen, the constraint device for preventing the upper part of the foundation pit retaining pile from tilting outward in this embodiment includes a retaining pile 1, which is a steel pipe pile. The retaining pile 1 can be replaced by a welded limiting block instead of the anti-tension support structure in embodiment 1. A waler 2 is provided on the inner side of the retaining pile 1, and a supporting bracket 9 is provided at the bottom of the waler 2.

[0048] A first limiting block 10 is provided on the upper surface of the supporting corbel 9, a second limiting block 11 is provided on the inner side of the retaining pile 1, and the waler 2 is placed on the upper surface of the supporting corbel 9. The inner side of the waler 2 is in contact with the first limiting block 10, and the outer side of the waler 2 is in contact with the second limiting block 11.

[0049] Example 3

[0050] from Figure 13-14 As can be seen, a restraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward in this embodiment includes a retaining pile 1, which is a U-shaped steel sheet pile, and a waler 2 is provided on the inner side of the retaining pile 1.

[0051] A first limiting block 10 is provided on the upper surface of the supporting corbel 9, a second limiting block 11 is provided on the inner side of the retaining pile 1, and the waler 2 is placed on the upper surface of the supporting corbel 9. The inner side of the waler 2 is in contact with the first limiting block 10, and the outer side of the waler 2 is in contact with the second limiting block 11.

[0052] In Examples 2 and 3, the anti-tension support structure 3 and anti-tension screw 4 in Example 1 are omitted. Under the action of the first limiting block 10 and the second limiting block 11, the waler 2 forms a force-bearing whole with the retaining pile 1, thereby constraining the retaining pile 1.

[0053] Example 4

[0054] from Figure 15-17 As can be seen, a constraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward in this embodiment includes a retaining pile 1. The inner side of the retaining pile 1 is replaced by an H-beam instead of the waler 2 structure in embodiments 1-3. At the same time, limit constraint blocks 5 are placed on the upper and lower sides of the web of the H-beam. The H-beam forms an interlocking structure with the steel support system 8 through the limit constraint blocks 5, the connecting plate 7, and the steel support system 8.

[0055] As the excavation depth of the foundation pit increases, the active earth pressure generated by the soil beneath the retaining piles gradually increases. When this earth pressure exceeds the compressive bearing capacity of the lower part of the retaining piles, it will cause the lower part of the retaining piles to deform and displace into the foundation pit in the maximum bending moment zone, which may lead to outward tilting instability and failure of the pile top in severe cases. This utility model uses the rigid joint between the limiting constraint block 5 and the connecting plate 7 to construct the retaining pile 1, waler 2, support block 6 and steel support system 8 into an integral constraint system, applying bidirectional shear constraint, thereby reducing the bending moment at the root of the retaining pile 1 and controlling the horizontal displacement of the pile top within a stable range, completely eliminating the risk of outward tilting instability.

[0056] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A restraining device for preventing the upper part of the retaining pile of a foundation pit from tilting outward, comprising retaining pile (1), characterized in that: The inner side of the retaining pile (1) is provided with a waler (2), and the outer side of the retaining pile (1) is provided with a counter-tension support structure (3). The surface of the anti-pull support structure (3) is also equipped with an anti-pull screw (4). Both ends of the anti-pull screw (4) are provided with fastening bolts (401). One end of the anti-pull screw (4) passes through the anti-pull support structure (3) and is fixed to the anti-pull support structure (3) by fastening bolts (401). The other end of the anti-pull screw (4) passes through the waler (2) and is fixed to the waler (2) by fastening bolts (401). The waler (2) is provided with a limiting constraint block (5) inside and a support block (6) is provided outside. The upper surfaces of the support block (6) and the limiting constraint block (5) are provided with a connecting plate (7). The support block (6) and the limiting constraint block (5) are respectively assembled with the connecting plate (7) by bolts. The end of the support block (6) is provided with a steel support system (8).

2. The restraint device for preventing the upper part of the retaining pile of the foundation pit from tilting outward as described in claim 1, characterized in that: The limiting constraint block (5) is provided in two sets, which are respectively installed on the upper and lower sides of the web of the waler (2). Each set of limiting constraint block (5) has a corresponding connecting plate (7) on its surface.

3. A restraint device for preventing the upper part of the retaining pile of a foundation pit from tilting outward, as described in claim 1, characterized in that: The steel support system (8) includes a steel beam (801) and a jack (802), with the jack (802) installed between the steel beam (801) and the support block (6).

4. A restraint device for preventing the upper part of the retaining pile of a foundation pit from tilting outward, as described in claim 3, characterized in that: The jack (802) is provided with a protective cover (803) on its outer side. The two ends of the protective cover (803) are respectively assembled with the steel beam (801) and the support block (6).

5. A restraint device for preventing the upper part of the retaining pile of a foundation pit from tilting outward, as described in claim 1, characterized in that: The bottom of the waler (2) is provided with a supporting bracket (9), one side of the supporting bracket (9) is fixed to the retaining pile (1), and the upper end of the supporting bracket (9) is fixed to the waler (2).

6. A restraint device for preventing the upper part of the retaining pile of a foundation pit from tilting outward, as described in claim 5, characterized in that: The upper surface of the supporting bracket (9) is provided with a first limiting block (10), the inner side of the retaining pile (1) is provided with a second limiting block (11), the waler (2) is placed on the upper surface of the supporting bracket (9), the inner side of the waler (2) is in contact with the first limiting block (10), and the outer side of the waler (2) is in contact with the second limiting block (11).

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