A foundation pit support structure

Abstract

The application discloses a foundation pit supporting structure and belongs to the technical field of building construction, which comprises a Larsen steel sheet pile, an angle supporting mechanism, a center supporting mechanism and a drainage mechanism. The application is novel and ingenious. When the soil pressure in the pit wall is too large to cause the Larsen steel sheet pile to expand, the pressure of the Larsen steel sheet pile is released to prevent the pressure from being too large and causing the Larsen steel sheet pile to deform, thereby prolonging the service life. When the center part of the Larsen steel sheet pile is deformed due to expansion, the reinforcing plate extrudes the Larsen steel sheet pile to reset the Larsen steel sheet pile and keep the original state, thereby changing the deformation of the Larsen steel sheet pile caused by the excessive soil pressure during use. The whole device has low construction cost, short structure forming time, does not need to occupy a large amount of construction time and does not need to consume a large amount of resources, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a foundation pit support structure. Background Technology

[0002] Foundation pit support is a temporary support, reinforcement and protection measure adopted for the sidewalls and surrounding environment of the foundation pit to ensure the safety of underground structure construction and the surrounding environment. It prevents the collapse of the foundation pit sidewalls, ensures the smooth progress of the underground main structure construction, controls soil deformation, and avoids damage to adjacent buildings, roads, pipelines and other structures due to foundation pit excavation.

[0003] Underground engineering construction usually requires the excavation of a large number of foundation pits. When the construction site does not have the conditions for slope protection of the foundation pit or the temporary support cannot meet the construction needs, a support structure is generally used to support the foundation pit wall and ensure the stability of the geological body.

[0004] Currently, various forms of concrete structures are commonly used to support the walls of foundation pits. However, the molding of concrete structures takes a long time and consumes a lot of construction time. Furthermore, since most foundation pits are one-time structures, they need to be backfilled after construction. Using concrete structures for support results in the consumption of a lot of resources and high construction costs. Moreover, when it rains, if the water in the pit walls cannot be drained in time, it will cause the soil to loosen and collapse, thereby reducing the support capacity of the support structure.

[0005] Therefore, this application proposes a foundation pit support structure. Utility Model Content

[0006] This application proposes a foundation pit support structure to solve the problems mentioned in the background art. By setting up corner support mechanisms and central support mechanisms, when the soil pressure in the pit wall is too high and causes the Larssen sheet piles to expand, the pressure on the Larssen sheet piles is released to prevent excessive pressure from causing deformation of the Larssen sheet piles, which would eventually affect their service life. When the central part of the Larssen sheet pile deforms due to expansion, the reinforcing plate squeezes the Larssen sheet piles, restoring them to their original shape. This changes the deformation of the Larssen sheet piles caused by excessive soil pressure during use. The entire device has low construction cost, short structural forming time, does not require a large amount of construction time, and does not consume a large amount of resources, greatly improving the practicality of the device.

[0007] To achieve the above objectives, this application adopts the following technical solution: A foundation pit support structure includes Larssen sheet piles, corner support mechanisms, central support mechanisms, and drainage mechanisms. There are four Larssen sheet piles forming a enclosure. Corner support mechanisms are provided at the four corners of the top of the enclosure, and a central support mechanism is provided at the center of the top of the enclosure. Each Larssen sheet pile is equipped with several drainage mechanisms.

[0008] In a preferred embodiment, the corner support mechanism includes two sets of brackets, each set of brackets consisting of a first support rod and two second support rods, one end of each of the two second support rods being threadedly connected to the first support rod, and the other end of each being rotatably connected to the Larssen sheet pile. By setting up an angle support mechanism, when the soil pressure inside the pit wall is too high, causing the Larssen sheet pile to expand, the second support rod will extend and retract within the first support rod to release the pressure on the Larssen sheet pile. This prevents excessive pressure from causing deformation of the Larssen sheet pile, which would eventually affect its service life, thus improving the practicality of the device.

[0009] In a preferred embodiment, the central support mechanism includes a cross cylinder, a sleeve, and a sleeve rod, each of the sleeve rods being connected to the cross cylinder via the sleeve, and the end of each sleeve rod that connects to the cross cylinder being threadedly connected to the sleeve. By setting up a central support mechanism, the deformation of Larssen sheet piles caused by excessive soil pressure during use is reduced, thereby improving the practicality of the device.

[0010] In a preferred embodiment, the central support mechanism further includes a reinforcing plate, each of which is fixedly connected to the Larssen sheet pile, and the end of each sleeve rod away from the sleeve is fixedly connected to the reinforcing plate. By setting up a central support mechanism, when the central part of the Larssen sheet pile deforms due to expansion, the sleeve is rotated so that one end of the sleeve rod transmits pressure to the reinforcing plate. The reinforcing plate squeezes the Larssen sheet pile, restoring it to its original shape, thereby improving the practicality of the device.

[0011] In a preferred embodiment, the drainage mechanism includes conical cylinders, each of which is fixedly connected to Larssen sheet piles and extends into the soil; By setting up a drainage mechanism, the conical cylinder extends into the soil inside the pit wall, which can provide better support for the Larssen sheet piles, improve stability, and thus enhance the practicality of the device.

[0012] In a preferred embodiment, the drainage mechanism further includes steel pipes, slots, tie rods, and conical push blocks. Each steel pipe is fixedly connected to Larssen sheet piles and penetrates the conical cylinder deep into the soil. Each steel pipe has several slots. By setting up a drainage mechanism, when it rains, rainwater in the soil will enter the steel pipe through the slots opened on the steel pipe and be discharged to the outside of the Larssen sheet pile. This reduces the accumulation of internal moisture and prevents excessive moisture from causing the soil to loosen and collapse, thus ensuring the support capacity of the Larssen sheet pile and improving the practicality of the device.

[0013] In a preferred embodiment, each of the steel pipes is slidably connected to a tie rod inside, and a conical push block is fixedly connected to one end of each tie rod located inside the steel pipe; By setting up a drainage mechanism, pulling the lever moves the conical pusher inside the steel pipe, which can drain the soil that has seeped into the steel pipe, ensuring that the steel pipe is unobstructed, thereby improving the practicality of the device.

[0014] The beneficial effects of this application are: 1. This foundation pit support structure, by setting up corner support mechanisms and central support mechanisms, releases the pressure on Larssen sheet piles when excessive soil pressure in the pit wall causes them to expand, preventing excessive pressure from causing deformation and affecting their service life over time. When the central part of the Larssen sheet pile deforms due to expansion, the reinforcing plate squeezes the Larssen sheet pile, restoring it to its original shape. This changes the deformation of the Larssen sheet piles caused by excessive soil pressure during use. The entire device has low construction cost, short structural forming time, does not require a large amount of construction time, and does not consume a large amount of resources, greatly improving the practicality of the device. 2. This foundation pit support structure is equipped with a drainage mechanism. When it rains, rainwater in the soil will enter the steel pipe through the slots opened on the steel pipe and be discharged to the outside of the Larssen steel sheet pile. This reduces the accumulation of internal moisture and prevents the soil from becoming loose and collapsing due to excessive moisture. This ensures the support capacity of the Larssen steel sheet pile and greatly improves the practicality of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device in this application; Figure 2 This is a partial structural schematic diagram of the device in this application; Figure 3 This is a schematic diagram of the drainage mechanism of the device in this application; Figure 4 This is a schematic diagram of the corner support mechanism of the device in this application.

[0016] The following are the labeling elements in the diagram: 1. Larssen sheet pile; 2. Angle support mechanism; 21. Support rod one; 22. Support rod two; 3. Central support mechanism; 31. Cross cylinder; 32. Sleeve; 33. Sleeve rod; 34. Reinforcing plate; 4. Drainage mechanism; 41. Conical cylinder; 42. Steel pipe; 43. Groove; 44. Tie rod; 45. Conical push block. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0018] Reference Figure 1-4 A foundation pit support structure includes Larssen sheet piles 1, corner support mechanisms 2, central support mechanisms 3, and drainage mechanisms 4. There are four Larssen sheet piles 1, which form a enclosure. Corner support mechanisms 2 are provided at the four corners of the top of the enclosure, and a central support mechanism 3 is provided at the center of the top of the enclosure. Several drainage mechanisms 4 are provided on each Larssen sheet pile 1.

[0019] Reference Figure 1 , 2 4. The corner support mechanism 2 includes two sets of supports. Each set of supports consists of a first support rod 21 and two second support rods 22. One end of each second support rod 22 is threadedly connected to the first support rod 21, and the other end is rotatably connected to the Larssen sheet pile 1. By setting up the corner support mechanism 2, when the soil pressure in the pit wall is too high, causing the Larssen sheet pile 1 to expand, the second support rod 22 will expand and contract within the first support rod 21, releasing the pressure on the Larssen sheet pile 1. This prevents excessive pressure from causing deformation of the Larssen sheet pile 1, which would eventually affect its service life, thereby improving the practicality of the device.

[0020] Reference Figure 1-2 The central support mechanism 3 includes a cross cylinder 31, a sleeve 32, and a sleeve rod 33. Each sleeve rod 33 is connected to the cross cylinder 31 through the sleeve 32, and the end of each sleeve rod 33 that connects to the cross cylinder 31 is threadedly connected to the sleeve 32. By setting the central support mechanism 3, the deformation of the Larssen steel sheet pile 1 caused by excessive soil pressure during use is changed, thereby improving the practicality of the device.

[0021] Reference Figure 1-2 The central support mechanism 3 also includes a reinforcing plate 34, each of which is fixedly connected to the Larssen sheet pile 1, and the end of each sleeve rod 33 away from the sleeve 32 is fixedly connected to the reinforcing plate 34. By setting the central support mechanism 3, when the central part of the Larssen sheet pile 1 deforms due to expansion, the sleeve 32 is rotated so that one end of the sleeve rod 33 transmits pressure to the reinforcing plate 34. The reinforcing plate 34 squeezes the Larssen sheet pile 1, resets the Larssen sheet pile 1, and maintains its original shape, thereby improving the practicality of the device.

[0022] Reference Figure 1-3 The drainage mechanism 4 includes a conical cylinder 41, each of which is fixedly connected to the Larssen sheet pile 1 and extends into the soil. By setting up the drainage mechanism 4, the conical cylinder 41 extends into the soil inside the pit wall, which can provide better support for the Larssen sheet pile 1, improve stability, and thus enhance the practicality of the device.

[0023] Reference Figure 1-3The drainage mechanism 4 also includes steel pipes 42, slots 43, tie rods 44, and conical push blocks 45. Each steel pipe 42 is fixedly connected to the Larssen sheet pile 1 and penetrates the conical cylinder 41 into the soil. Each steel pipe 42 has several slots 43. By setting up the drainage mechanism 4, when it rains, rainwater in the soil will enter the steel pipe 42 through the slots 43 and drain out of the Larssen sheet pile 1, reducing the accumulation of internal water and preventing excessive water from causing the soil to loosen and collapse. This ensures the support capacity of the Larssen sheet pile 1 and improves the practicality of the device.

[0024] Reference Figure 1-3 Each steel pipe 42 is slidably connected to a tie rod 44 inside, and a conical push block 45 is fixedly connected to one end of each tie rod 44 inside the steel pipe 42. By setting up a drainage mechanism 4, the tie rod 44 is manually operated. Pulling the tie rod 44 drives the conical push block 45 to move inside the steel pipe 42, which can drain the soil that has seeped into the steel pipe 42, ensuring that the steel pipe 42 is unobstructed, thereby improving the practicality of the device.

[0025] Working principle: By setting up the corner support mechanism 2, when the soil pressure in the pit wall is too high, causing the Larssen steel sheet pile 1 to expand, the support rod 22 will extend and retract within the support rod 21 to release the pressure on the Larssen steel sheet pile 1, preventing excessive pressure from causing deformation of the Larssen steel sheet pile 1 and affecting its service life over time. By setting up the central support mechanism 3, when the central part of the Larssen steel sheet pile 1 deforms due to expansion, the sleeve 32 is rotated, causing one end of the sleeve rod 33 to transmit pressure to the reinforcing plate 34. The reinforcing plate 34 squeezes the Larssen steel sheet pile 1, thus compressing the Larssen steel sheet pile 1. The pile 1 is reset to its original state, thereby changing the deformation of the Larssen steel sheet pile 1 caused by excessive soil pressure during use. By setting up a drainage mechanism 4, the conical cylinder 41 extends into the soil inside the pit wall, which can better support the Larssen steel sheet pile 1 and improve its stability. When it rains, the rainwater in the soil will enter the steel pipe 42 through the slot 43 opened on the steel pipe 42 and be discharged to the outside of the Larssen steel sheet pile 1 along the steel pipe 42, reducing the accumulation of internal water and preventing excessive water from causing the soil to loosen and collapse, thereby ensuring the support capacity of the Larssen steel sheet pile 1.

[0026] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A foundation pit support structure comprising a Larssen steel sheet pile (1), a corner support mechanism (2), a center support mechanism (3), and a drainage mechanism (4), characterized by, There are four Larssen sheet piles (1) forming a fence. Corner support mechanisms (2) are provided at the four corners of the top of the fence, and a central support mechanism (3) is provided at the center of the top of the fence. Several drainage mechanisms (4) are provided on each Larssen sheet pile (1).

2. A foundation pit support structure according to claim 1, wherein The corner support mechanism (2) includes two sets of brackets. Each set of brackets consists of a first support rod (21) and two second support rods (22). One of the two second support rods (22) is threadedly connected to the first support rod (21), and the other end is rotatably connected to the Larsen sheet pile (1).

3. The foundation pit support structure according to claim 1, characterized in that, The central support mechanism (3) includes a cross cylinder (31), a sleeve (32) and a sleeve rod (33). Each sleeve rod (33) is connected to the cross cylinder (31) through the sleeve (32), and the end of each sleeve rod (33) that connects to the cross cylinder (31) is threadedly connected to the sleeve (32).

4. The foundation pit support structure according to claim 3, characterized in that, The central support mechanism (3) also includes a reinforcing plate (34), each of which is fixedly connected to the Larssen sheet pile (1), and the end of each sleeve (33) away from the sleeve (32) is fixedly connected to the reinforcing plate (34).

5. The foundation pit support structure according to claim 1, characterized in that, The drainage mechanism (4) includes a conical tube (41), each of which is fixedly connected to a Larsen sheet pile (1) and extends into the soil.

6. The foundation pit support structure according to claim 1, characterized in that, The drainage mechanism (4) also includes steel pipes (42), slots (43), tie rods (44) and conical push blocks (45). Each steel pipe (42) is fixedly connected to Larssen sheet piles (1) and penetrates the conical cylinder (41) into the soil. Each steel pipe (42) has several slots (43).

7. The foundation pit support structure according to claim 6, characterized in that, Each of the steel pipes (42) has a pull rod (44) slidably connected inside, and a conical push block (45) is fixedly connected to one end of each pull rod (44) inside the steel pipe (42).

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