Adjustable foundation pit slope supporting device and using method thereof

Abstract

The invention discloses an adjustable foundation pit slope supporting device and a using method thereof, and belongs to the technical field of foundation pit slope supporting, the adjustable foundation pit slope supporting device comprises a foundation pit slope body, a protection plate is arranged on the foundation pit slope body, and a first supporting mechanism and a second supporting mechanism are arranged on the side, away from the foundation pit slope body, of the protection plate; a first sliding groove and a second sliding groove are formed in the bottom of the foundation pit slope body, a first supporting mechanism is slidably connected into the first sliding groove and comprises a plurality of first supporting parts slidably connected into the first sliding groove, the first supporting parts are slidably connected with the protection plate, and a second supporting mechanism is slidably connected into the second sliding groove and comprises a plurality of second supporting parts slidably connected with the protection plate. The second supporting mechanism abuts against the protection plate. The protective plate serves as a direct stress surface to disperse soil pressure; the first supporting mechanism provides primary supporting, the second supporting mechanism is finally fixed by abutting against the protection plate, a stepped supporting structure is formed, meanwhile, the positions of the first supporting mechanism and the second supporting mechanism can be flexibly adjusted, and the applicability of the device is improved.

Description

Technical Field

[0001] This invention belongs to the field of foundation pit slope protection technology, and particularly relates to an adjustable foundation pit slope protection device and its usage method. Background Technology

[0002] Slope protection refers to the measures taken to support, reinforce, and protect slopes to ensure their safety and the safety of their environment. Currently, foundation pit construction is common in building projects. In areas with soft soil, poor stability, and abundant groundwater, such as the silty soil conditions in northern my country, the stability of foundation pit slopes is relatively poor. Even with relatively shallow pits and gentle slopes, the slope surface is prone to collapse and slippage under the influence of rainwater infiltration or vibrations from construction, causing excavated soil to fall to the bottom of the pit and affecting the safety of construction. Traditional support devices are mostly single, fixed structures, unable to adapt to the support needs of foundation pit slopes at different heights, and difficult to adjust after installation. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable foundation pit slope support device and its usage method to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides an adjustable foundation pit slope support device, including a foundation pit slope body, a protective plate on the foundation pit slope body, a first support mechanism and a second support mechanism respectively provided on the side of the protective plate away from the foundation pit slope body, a first chute and a second chute respectively provided at the bottom of the foundation pit slope body, the first support mechanism being slidably connected in the first chute, the first support mechanism including a plurality of first support parts slidably connected in the first chute, the first support parts being slidably connected to the protective plate, the second support mechanism being slidably connected in the second chute, and the second support mechanism abutting against the protective plate.

[0005] The protective plate is fixedly connected to a third sliding groove. The first support part includes a first slider that is slidably connected in the first sliding groove. A first limiting member is provided between the first slider and the first sliding groove. A first connecting member is fixedly connected to the top surface of the first slider. The first connecting member is slidably connected in the third sliding groove.

[0006] Preferably, the first slider has a first cavity, and the two sides of the first slide groove have a first opening and a second opening, respectively. The first cavity has a first limiting member, which includes a first motor fixedly connected to the first cavity. The output shaft of the first motor is fixedly connected to a first gear. The top of the first gear has a fourth slide groove, and the bottom of the first gear has a fifth slide groove. The fourth slide groove communicates with the first opening, and the fifth slide groove communicates with the second opening. A first connecting rod is slidably connected in the fourth slide groove and is slidably connected to the first opening. The bottom of the first connecting rod has a first tooth that meshes with the first gear. A second connecting rod is slidably connected in the fifth slide groove and is slidably connected to the second opening. The top of the second connecting rod has a second tooth that meshes with the first gear.

[0007] Preferably, the first connector includes a first connecting seat fixed to the top surface of the first slider, the top surface of the first connecting seat is provided with a first groove, one end of a third connecting rod is hinged in the first groove, and a second connecting seat is hinged to the end of the third connecting rod away from the first groove, and the second connecting seat is slidably connected in the third groove.

[0008] Preferably, the second support mechanism includes a first connecting column slidably connected in the second slid groove, a first driving member is provided between the first connecting column and the second slid groove, a connecting frame is fixedly connected to the outside of the first connecting column, the connecting frame is slidably connected to the top surface of the foundation pit slope body, second connecting columns are symmetrically slidably connected to both sides of the first connecting column, and an abutment member is slidably connected to the side of the second connecting column away from the first connecting column.

[0009] Preferably, the second groove is provided with second grooves on both sides of the second groove, and the bottom surface of the first connecting post is symmetrically fixed with a first connecting plate, and the first connecting plate and the second groove adjacent to it are slidably connected.

[0010] Preferably, the bottom of the first connecting column is provided with a second cavity, and the first driving member is provided in the second cavity. The first driving member includes a second motor fixedly connected in the second cavity, and the output shaft of the second motor is fixedly connected with a second gear. The bottom surface of the second slide groove is provided with a third groove, and a third tooth is provided in the third groove, which meshes with the second gear.

[0011] Preferably, the top two sides of the first connecting column are symmetrically provided with a sixth sliding groove, the second connecting column is slidably connected in the sixth sliding groove, a lead screw is rotatably connected in the sixth sliding groove, a third motor is fixedly connected to the top of the lead screw, the third motor is fixedly connected to the top surface of the first connecting column, and the lead screw is threadedly connected to the second connecting column.

[0012] Preferably, the abutting member includes a third connecting post slidably connected within the second connecting post, an abutting plate fixedly connected to one end of the third connecting post away from the second connecting post, the abutting plate abutting against the guard plate, a third cavity provided within the second connecting post, an electric telescopic rod fixedly connected within the third cavity, and the output end of the electric telescopic rod fixedly connected to the third connecting post.

[0013] A method for using an adjustable foundation pit slope protection device includes the following steps:

[0014] S1. Install the protective plate and connect it to the foundation pit slope body;

[0015] S2. Install multiple first support parts in the first chute to initially fix the guard plate;

[0016] S3. Install the second support mechanism in the second chute to finally fix the guard plate.

[0017] This invention discloses the following technical advantages: A protective plate is installed on the surface of the foundation pit slope. The first support mechanism slides to the target position via a first chute and is then fixed. The second support mechanism slides to the target position via a second chute and abuts against the protective plate, forming a double support. The protective plate, as a direct load-bearing surface, disperses soil pressure. The first support mechanism provides initial support, and the second support mechanism achieves final fixation by abutting against the protective plate, forming a stepped support structure. Furthermore, the positions of the first and second support mechanisms can be flexibly adjusted, improving the applicability of the device. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the adjustable foundation pit slope support device of the present invention;

[0020] Figure 2 This is a side view of the adjustable foundation pit slope support device of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified view of part A in the image;

[0022] Figure 4 For the present invention Figure 2 A magnified view of part B in the image.

[0023] In the diagram: 1. Foundation pit slope body; 2. Protective plate; 3. First chute; 4. Third chute; 5. Second chute; 6. First slider; 7. First cavity; 8. First opening; 9. Second opening; 10. First motor; 11. First gear; 12. Fourth chute; 13. Fifth chute; 14. First connecting rod; 15. Second connecting rod; 16. First connecting seat; 17. First groove; 18. Third connecting rod; 19. Second connecting seat; 20. First connecting column; 21. Connecting frame; 22. Second connecting column; 23. Second groove; 24. First connecting plate; 25. Second cavity; 26. Second motor; 27. Second gear; 28. Third groove; 29. ​​Third tooth; 30. Sixth chute; 31. Lead screw; 32. Third motor; 33. Third connecting column; 34. Abutment plate; 35. Third cavity; 36. Electric telescopic rod. Detailed Implementation

[0024] As a core component of underground space development, the slope stability of foundation pit engineering directly impacts project safety and the safety of the surrounding environment. Traditional support technologies, due to their poor geological adaptability and low construction efficiency, struggle to meet the demands of complex urban conditions. Adjustable foundation pit slope support devices, through dynamic adjustment mechanisms, achieve real-time adaptation of the support structure to geological conditions, representing a significant direction for technological upgrading in the industry.

[0025] Excavation pit support technology can be traced back to the construction of ancient city walls. The alternating structure of wooden piles and rammed earth layers found in Han Dynasty city wall ruins confirms the existence of primitive support awareness. This method relies on the experience of craftsmen, using wooden poles to measure the soil's softness and visually judging whether the excavation depth is safe. After the Industrial Revolution, cast iron retaining plates became reusable for the first time, and the steel sheet pile structure used during the construction of the London Underground was three times stronger than wooden piles. However, while the application of steel has allowed excavation pit depths to exceed the ten-meter limit, traditional methods still have fundamental flaws:

[0026] Insufficient material durability: wooden supports are prone to corrosion in humid environments, and brick retaining walls are prone to tilting or damage when subjected to uneven stress;

[0027] Poor structural adaptability: Although the reinforced concrete slope protection pile plus anchor system solves the problem of retaining soil in deep foundation pits, its horizontal deformation control capability is limited and it is difficult to cope with the complex geological conditions in soft soil areas.

[0028] Long construction period: Traditional methods require the installation of the support system in stages. For example, the Shanghai Jin Mao Tower project uses a combination structure of bored piles and internal supports, which requires multiple ring concrete support beams to form a spatial stress system, resulting in low construction efficiency.

[0029] Adjustable support devices achieve dynamic adaptation through mechanical components. A typical example is the excavation support device designed by a certain invention patent:

[0030] Limiting components: The bottom box is equipped with a slot and a support rod. The angle of the protective plate is fixed by a spring and a toothed structure. The knob controls the threaded rod to drive the push block to move, so as to achieve quick adjustment and reset.

[0031] Extension plate design: The front and rear sides of the protective plate are movably connected to the extension plate, and the width can be expanded by fixing blocks and limit pins to adapt to different foundation pit sizes;

[0032] Insertion rod fixing: Four insertion rods are set at the bottom of the support plate, and the insertion depth into the soil is adjustable, which improves the overall stability.

[0033] This design improves the efficiency of support angle adjustment by 50% and reduces disassembly and folding time to one-third of the traditional method.

[0034] The new adjustable device incorporates smart materials, breaking through the traditional rigid support mode:

[0035] Shape memory alloy: A research institution tested a shape memory alloy support material that can automatically adjust its stiffness under soil pressure, reducing the need for manual intervention;

[0036] Microbial-induced calcium carbonate precipitation: By injecting specific bacterial groups to improve soil strength and form a bio-chemical composite support layer, a breakthrough has been achieved in the construction of ice wall water-stop curtains in sandy strata;

[0037] Pneumatic caisson technology: A project in Singapore used pneumatic caissons to construct an underground complex in soft soil layers, enabling simultaneous support and excavation.

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Reference Figures 1-4As shown, this embodiment provides an adjustable foundation pit slope support device, including a foundation pit slope body 1, a protective plate 2 on the foundation pit slope body 1, a first support mechanism and a second support mechanism respectively on the side of the protective plate 2 away from the foundation pit slope body 1, a first sliding groove 3 and a second sliding groove 5 respectively on the bottom of the foundation pit slope body 1, a first support mechanism slidably connected in the first sliding groove 3, the first support mechanism including a plurality of first support parts slidably connected in the first sliding groove 3, the first support parts being slidably connected to the protective plate 2, a second support mechanism slidably connected in the second sliding groove 5, the second support mechanism abutting against the protective plate 2.

[0041] The retaining plate 2 is installed on the surface of the foundation pit slope body 1. The first support mechanism slides to the target position through the first sliding groove 3 and is then fixed. The second support mechanism slides to the target position through the second sliding groove 5 and abuts against the retaining plate 2, forming a double support. The retaining plate 2 serves as the direct force-bearing surface to distribute soil pressure; the first support mechanism provides initial support, and the second support mechanism achieves final fixation by abutting against the retaining plate 2, forming a stepped support structure. At the same time, the positions of the first and second support mechanisms can be flexibly adjusted to improve the applicability of the device.

[0042] The guard plate 2 is fixedly connected to a third sliding groove 4. The first support part includes a first slider 6 that is slidably connected in the first sliding groove 3. A first limiting member is provided between the first slider 6 and the first sliding groove 3. A first connecting member is fixedly connected to the top surface of the first slider 6. The first connecting member is slidably connected in the third sliding groove 4.

[0043] The first slider 6 slides within the first groove 3 and is fixed in position by the first limiting member; the first connecting member slides along the third groove 4 to adjust the connection angle between the first support and the guard plate 2. The sliding of the first slider 6 realizes the horizontal adjustment of the support position; the three grooves allow the first connecting member to slide at multiple angles to adapt to the inclined surface of the guard plate 2.

[0044] In a further optimized design, the first slider 6 has a first cavity 7, and the first slide groove 3 has a first opening 8 and a second opening 9 on both sides respectively. The first cavity 7 has a first limiting member, which includes a first motor 10 fixedly connected to the first cavity 7. The output shaft of the first motor 10 is fixedly connected to a first gear 11. The top of the first gear 11 has a fourth slide groove 12, and the bottom of the first gear 11 has a fifth slide groove 13. The fourth slide groove 12 communicates with the first opening 8, and the fifth slide groove 13 communicates with the second opening 9. A first connecting rod 14 is slidably connected in the fourth slide groove 12 and is slidably connected to the first opening 8. The bottom of the first connecting rod 14 has a first tooth that meshes with the first gear 11. A second connecting rod 15 is slidably connected in the fifth slide groove 13 and is slidably connected to the second opening 9. The top of the second connecting rod 15 has a second tooth that meshes with the first gear 11.

[0045] The first motor 10 drives the first gear 11 to rotate, causing the first connecting rod 14 and the second connecting rod 15 to slide in opposite directions and insert into the first opening 8 and the second opening 9 respectively, so that the first connecting rod 14 and the second connecting rod 15 abut against the side wall of the first slide groove 3, thereby limiting the position of the first slider 6.

[0046] In a further optimized scheme, the first connecting member includes a first connecting seat 16 fixed to the top surface of the first slider 6. The top surface of the first connecting seat 16 is provided with a first groove 17. One end of the third connecting rod 18 is hinged in the first groove 17. The end of the third connecting rod 18 away from the first groove 17 is hinged to a second connecting seat 19. The second connecting seat 19 is slidably connected in the third groove 4.

[0047] The third connecting rod 18 is hinged in the first groove 17 and slides in the third slide groove 4 through the second connecting seat 19 to adjust the connection length between the first support and the guard plate 2.

[0048] Further optimization of the scheme: the second support mechanism includes a first connecting column 20 slidably connected in the second sliding groove 5, a first driving member between the first connecting column 20 and the second sliding groove 5, a connecting frame 21 fixedly connected to the outside of the first connecting column 20, the connecting frame 21 slidably connected to the top surface of the foundation pit slope body 1, and second connecting columns 22 symmetrically slidably connected to both sides of the first connecting column 20, with an abutment member slidably connected to the side of the second connecting column 22 away from the first connecting column 20.

[0049] The first connecting post 20 slides within the second groove 5 to the target position, and the first driving member drives its movement; the second connecting post 22 slides along both sides of the first connecting post 20, and the abutting member abuts against the guard plate 2. The first connecting post 20 provides vertical support force; the second connecting posts 22 on both sides disperse horizontal pressure, and the abutting member enhances the stability of the guard plate 2.

[0050] In a further optimized design, the second groove 5 is provided with symmetrical second grooves 23 on both sides, and the bottom surface of the first connecting column 20 is symmetrically fixed with a first connecting plate 24, and the first connecting plate 24 and the adjacent second groove 23 are slidably connected.

[0051] The first connecting plate 24 slides along the second groove 23, guiding the first connecting post 20 to move vertically and preventing it from shifting.

[0052] In a further optimized design, the bottom of the first connecting column 20 is provided with a second cavity 25, and a first driving component is provided in the second cavity 25. The first driving component includes a second motor 26 fixedly connected in the second cavity 25. The output shaft of the second motor 26 is fixedly connected with a second gear 27. The bottom surface of the second slide groove 5 is provided with a third groove 28, and a third tooth 29 is provided in the third groove 28. The third tooth 29 meshes with the second gear 27.

[0053] The second motor 26 drives the second gear 27 to rotate, which meshes with the third tooth 29, causing the first connecting column 20 to move along the second slide groove 5.

[0054] In a further optimized design, the top two sides of the first connecting column 20 are symmetrically provided with a sixth sliding groove 30, the second connecting column 22 is slidably connected in the sixth sliding groove 30, a lead screw 31 is rotatably connected in the sixth sliding groove 30, a third motor 32 is fixedly connected to the top of the lead screw 31, the third motor 32 is fixedly connected to the top surface of the first connecting column 20, and the lead screw 31 is threadedly connected to the second connecting column 22.

[0055] The third motor 32 drives the lead screw 31 to rotate, causing the second connecting column 22 to slide along the sixth slide groove 30, thereby adjusting the height of the abutment.

[0056] A further optimized design includes a third connecting post 33 slidably connected within the second connecting post 22. An abutment plate 34 is fixedly connected to the end of the third connecting post 33 furthest from the second connecting post 22, abutting against the guard plate 2. A third cavity 35 is provided within the second connecting post 22, and an electric telescopic rod 36 is fixedly connected within the third cavity 35. The output end of the electric telescopic rod 36 is fixedly connected to the third connecting post 33. The electric telescopic rod 36 drives the third connecting post 33 to extend and retract, causing the abutment plate 34 to abut tightly against the guard plate 2.

[0057] A method for using an adjustable foundation pit slope protection device includes the following steps:

[0058] S1. Install the protective plate 2 and connect the protective plate 2 to the foundation pit slope body 1;

[0059] S2. Install multiple first support parts in the first slide groove 3 to initially fix the guard plate 2;

[0060] S3. Install the second support mechanism in the second chute 5 to finally fix the guard plate 2.

[0061] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0062] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An adjustable foundation pit slope support device, comprising a foundation pit slope body (1), characterized in that: The foundation pit slope body (1) is provided with a protective plate (2). The protective plate (2) is provided with a first support mechanism and a second support mechanism on the side away from the foundation pit slope body (1). The bottom of the foundation pit slope body (1) is provided with a first chute (3) and a second chute (5). The first support mechanism is slidably connected in the first chute (3). The first support mechanism includes a plurality of first support parts slidably connected in the first chute (3). The first support parts are slidably connected to the protective plate (2). The second support mechanism is slidably connected in the second chute (5). The second support mechanism abuts against the protective plate (2).

2. The adjustable foundation pit slope support device according to claim 1, characterized in that: The guard plate (2) is fixedly connected to a third sliding groove (4). The first support part includes a first slider (6) slidably connected in the first sliding groove (3). A first limiting member is provided between the first slider (6) and the first sliding groove (3). A first connecting member is fixedly connected to the top surface of the first slider (6). The first connecting member is slidably connected in the third sliding groove (4).

3. The adjustable foundation pit slope support device according to claim 2, characterized in that: The first slider (6) has a first cavity (7) inside. The first groove (3) has a first opening (8) and a second opening (9) on both sides respectively. The first cavity (7) has a first limiting member. The first limiting member includes a first motor (10) fixedly connected to the first cavity (7). The output shaft of the first motor (10) is fixedly connected to a first gear (11). The top of the first gear (11) has a fourth groove (12), and the bottom of the first gear (11) has a fifth groove (13). The fourth groove (12) communicates with the first opening (8). The fifth groove (13) communicates with the first opening (8). The slide groove (13) is connected to the second opening (9). A first connecting rod (14) is slidably connected in the fourth slide groove (12). The first connecting rod (14) is slidably connected to the first opening (8). The bottom of the first connecting rod (14) is provided with a first tooth. The first tooth meshes with the first gear (11). A second connecting rod (15) is slidably connected in the fifth slide groove (13). The second connecting rod (15) is slidably connected to the second opening (9). The top of the second connecting rod (15) is provided with a second tooth. The second tooth meshes with the first gear (11).

4. The adjustable foundation pit slope support device according to claim 2, characterized in that: The first connector includes a first connecting seat (16) fixed to the top surface of the first slider (6). The top surface of the first connecting seat (16) is provided with a first groove (17). One end of a third connecting rod (18) is hinged in the first groove (17). A second connecting seat (19) is hinged to the end of the third connecting rod (18) away from the first groove (17). The second connecting seat (19) is slidably connected in the third groove (4).

5. The adjustable foundation pit slope support device according to claim 1, characterized in that: The second support mechanism includes a first connecting column (20) slidably connected in the second slide groove (5), a first driving member is provided between the first connecting column (20) and the second slide groove (5), a connecting frame (21) is fixedly connected to the outside of the first connecting column (20), the connecting frame (21) is slidably connected to the top surface of the foundation pit slope body (1), and second connecting columns (22) are symmetrically slidably connected on both sides of the first connecting column (20), and an abutment member is slidably connected on the side of the second connecting column (22) away from the first connecting column (20).

6. The adjustable foundation pit slope support device according to claim 5, characterized in that: The second groove (5) has symmetrical second grooves (23) on both sides, and the bottom surface of the first connecting column (20) is symmetrically fixed with a first connecting plate (24). The first connecting plate (24) and the adjacent second groove (23) are slidably connected.

7. The adjustable foundation pit slope support device according to claim 5, characterized in that: The bottom of the first connecting column (20) is provided with a second cavity (25), and the first driving member is provided in the second cavity (25). The first driving member includes a second motor (26) fixed in the second cavity (25). The output shaft of the second motor (26) is fixed with a second gear (27). The bottom surface of the second slide (5) is provided with a third groove (28). The third groove (28) is provided with a third tooth (29). The third tooth (29) meshes with the second gear (27).

8. The adjustable foundation pit slope support device according to claim 5, characterized in that: The first connecting column (20) has six sliding grooves (30) symmetrically arranged on both sides of its top. The second connecting column (22) is slidably connected in the sixth sliding groove (30). A lead screw (31) is rotatably connected in the sixth sliding groove (30). A third motor (32) is fixedly connected to the top of the lead screw (31). The third motor (32) is fixedly connected to the top surface of the first connecting column (20). The lead screw (31) is threadedly connected to the second connecting column (22).

9. The adjustable foundation pit slope support device according to claim 5, characterized in that: The abutment includes a third connecting post (33) slidably connected within the second connecting post (22). An abutment plate (34) is fixedly connected to one end of the third connecting post (33) away from the second connecting post (22). The abutment plate (34) abuts against the guard plate (2). A third cavity (35) is provided inside the second connecting post (22). An electric telescopic rod (36) is fixedly connected inside the third cavity (35). The output end of the electric telescopic rod (36) is fixedly connected to the third connecting post (33).

10. A method of using an adjustable foundation pit slope protection device, based on the adjustable foundation pit slope protection device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Install the protective plate (2) and connect the protective plate (2) to the foundation pit slope body (1); S2. Install multiple first support parts in the first slide groove (3) to initially fix the guard plate (2); S3. Install the second support mechanism in the second groove (5) to finally fix the guard plate (2).

Images