Combined flexible self-balancing foundation pit supporting device

Abstract

The invention relates to the technical field of supporting devices, and discloses a combined flexible self-balancing foundation pit supporting device which comprises two constructional columns pre-buried at the corner of a foundation pit, a plurality of mutually spliced steel sheet piles are installed between the two constructional columns, I-shaped steel is further fixedly installed between the two constructional columns, and the I-shaped steel is fixedly connected with the constructional columns. The I-shaped steel is installed on the side, away from the wall of the foundation pit, of the steel sheet pile, and a plurality of anchor rods penetrating into the wall of the foundation pit are inserted into the outer surface of the I-shaped steel in a penetrating mode. Through the traction effect of a plurality of steel cables, a connecting plate can drive a winding shaft to rotate, a plurality of transmission gears are installed on the outer surface of the winding shaft, the transmission gears are meshed with a transmission rack, so that a push plate is pushed to move towards a steel sheet pile, and the push plate exerts force through the steel sheet pile inclining outwards to help push the steel sheet pile back to the wall of a foundation pit. Therefore, the collapsed pit wall is effectively supported, the effect that the steel sheet piles support the pit wall of the foundation pit in a balanced mode is achieved, and the supporting capacity of the foundation pit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of support devices, and in particular to a combined flexible self-balancing foundation pit support device. Background Art

[0002] As a key engineering technology, foundation pit support plays a role in protecting the stability of underground space. Foundation pit support can effectively ensure the safety of construction personnel and equipment, prevent the influx of groundwater and soil, reduce the incidence of engineering accidents, and ensure the smooth progress of the construction process. Foundation pit support generally adopts anti-overturning structures such as rigid sheet piles fixed on the inner wall of the foundation pit to complete the support.

[0003] An existing steel sheet pile foundation pit support device (Announcement No.: CN216405428U) has at least the following disadvantages: the above patent uses different steel sheet pile support components to support the foundation pit; since the anti-overturning capacity of this support structure is constant, when the collapse force of a certain pit wall is greater than its anti-overturning capacity, the anti-overturning structure will gradually be damaged and fail, affecting the effect of supporting the balance of the foundation pit wall. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a combined flexible self-balancing foundation pit supporting device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A combined flexible self-balancing foundation pit support device includes two structural columns pre-buried at the corners of the foundation pit, a plurality of steel sheet piles spliced ​​together are installed between the two structural columns, an I-beam is fixedly installed between the two structural columns, the I-beam is installed on the side of the steel sheet pile away from the foundation pit wall, a plurality of anchor rods penetrating into the foundation pit wall are inserted through the outer surface of the I-beam, C-shaped slide rails are fixedly installed on the outer surfaces of the adjacent sides of the two structural columns, sliders are slidably installed on the inner walls of the two C-shaped slide rails, a push plate is fixedly installed between the two sliders, the push plate is arranged above the I-beam, and a support mechanism is installed between the structural column and the push plate.

[0007] As a further solution of the present invention, the supporting mechanism includes a connecting plate fixedly installed between multiple steel sheet piles near their bottom outer surfaces, a winding shaft is rotatably installed between the outer surfaces of two structural columns near the push plate, multiple steel cables are evenly fixedly installed on the outer surface of the connecting plate, multiple brackets are evenly fixedly installed on the outer surface of the I-beam, a guide wheel is rotatably installed inside each of the brackets, the end of the steel cable away from the connecting plate bypasses the guide wheel and is fixedly installed on the winding shaft from the side close to the steel sheet pile, and a pushing assembly is installed between the winding shaft and the push plate.

[0008] As a further solution of the present invention, the pushing assembly includes a plurality of transmission racks evenly and fixedly mounted on the outer surface of the push plate, a plurality of transmission gears matching the transmission racks are evenly and fixedly mounted on the outer surface of the winding shaft, the transmission gears are meshed with the transmission racks, and a check assembly is installed between the structural column and the winding shaft.

[0009] As a further solution of the present invention, the non-return assembly includes a non-return wheel fixedly installed on the outer surface of both ends of the winding shaft, a plurality of trapezoidal grooves are evenly opened on the outer circumference of the non-return wheel, a fixed block is fixedly installed on the outer surface of the structural column close to the non-return wheel, a plurality of limit rods are inserted through the outer surface of the fixed block from top to bottom, a plurality of trapezoidal blocks matching the trapezoidal grooves are fixedly installed on the top ends of the plurality of limit rods, and a plurality of limit blocks are fixedly installed on the bottom ends of the plurality of limit rods.

[0010] As a further solution of the present invention, the outer surfaces of the plurality of limit rods are sleeved with compression springs, and the compression springs are arranged between the bottom of the trapezoidal clamping block and the top of the fixed block.

[0011] As a further solution of the present invention, a warning mechanism is installed between the two structural columns and the push plate, and the warning mechanism includes a horizontal plate fixedly installed between the two structural columns, and a plurality of liquid storage cylinders are evenly and fixedly installed on the upper surface of the horizontal plate, and a spray head connected to the interior of the liquid storage cylinder is fixedly installed at one end of the liquid storage cylinder close to the steel sheet pile, and an extrusion assembly is installed between the liquid storage cylinder and the push plate.

[0012] As a further solution of the present invention, the extrusion assembly includes a piston slidably mounted on the inner wall of a liquid storage barrel, a push rod is fixedly mounted on the outer surface of the piston away from the liquid storage barrel, a fixed plate is fixedly mounted on the end of the push rod away from the piston, and multiple mounting plates are fixedly mounted between the fixed plate and the push plate.

[0013] As a further solution of the present invention, the structural column is fixedly installed with a limiting angle iron close to the outer surface of the connecting plate.

[0014] As a further solution of the present invention, a plurality of hexagonal sleeves are evenly and fixedly mounted on the outer surface of the winding shaft.

[0015] The beneficial effects of the present invention are:

[0016] 1. When the pit wall collapses, the soil will produce an outward squeezing force on the upper part of the steel sheet pile, causing the steel sheet pile to tilt outward. At this time, the lower part of the steel sheet pile will move inward, causing the connecting plate installed on the outer side of the lower part of the steel sheet pile to also move. Through the traction of multiple steel cables, the connecting plate will drive the winding shaft to rotate. Multiple transmission gears are installed on the outer surface of the winding shaft. These transmission gears are meshed with the transmission rack, thereby pushing the push plate to move toward the steel sheet pile. The push plate applies force through the outward-tilted steel sheet pile to help push the steel sheet pile back to the pit wall, thereby effectively supporting the collapsed pit wall, achieving the effect of steel sheet pile supporting the pit wall in a balanced manner, and improving the support capacity of the pit;

[0017] 2. When the push plate moves toward the steel sheet pile, the piston will be pushed by the mounting plate, the fixing plate and the push rod, so that the piston can squeeze out the eye-catching color pigment filled in the liquid storage cylinder through the spray head and spray it on the surface of the steel sheet pile, reminding the construction workers that there is a risk of collapse of the foundation pit wall in this area, so as to achieve the effect of warning the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the combined flexible self-balancing foundation pit supporting device proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the combined flexible self-balancing foundation pit supporting device proposed by the present invention after removing one structural column;

[0020] Figure 3 This is a schematic diagram of the I-beam and anchor rod installation structure of the combined flexible self-balancing foundation pit support device proposed by the present invention;

[0021] Figure 4 A schematic diagram of the push plate structure of the combined flexible self-balancing foundation pit support device proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the non-return assembly of the combined flexible self-balancing foundation pit support device proposed by the present invention;

[0023] Figure 6 This is a schematic diagram of the split structure of the liquid storage cylinder and the piston of the combined flexible self-balancing foundation pit support device proposed by the present invention;

[0024] Figure 7 for Figure 2 A magnified view of the structure at center;

[0025] Figure 8 for Figure 3 Enlarged view of the structure at point B in the middle.

[0026] In the figure: 1. structural column; 2. steel sheet pile; 3. I-beam; 4. anchor rod; 5. C-shaped slide rail; 6. slider; 7. push plate; 8. connecting plate; 9. winding shaft; 10. transmission gear; 11. transmission rack; 12. steel cable; 13. bracket; 14. guide wheel; 15. hexagonal sleeve; 16. check wheel; 17. trapezoidal slot; 18. fixing block; 19. limiting rod; 20. trapezoidal block; 21. limiting block; 22. compression spring; 23. cross plate; 24. liquid storage cylinder; 25. spray head; 26. piston; 27. push rod; 28. fixing plate; 29. ​​mounting plate; 30. limiting angle iron. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Refer to the attached Figure 1 -Attached Figure 8 The combined flexible self-balancing foundation pit supporting device comprises two structural columns 1 pre-buried at the corners of the foundation pit, a plurality of steel sheet piles 2 which are spliced ​​with each other are installed between the two structural columns 1, an I-beam 3 is fixedly installed between the two structural columns 1, the I-beam 3 is installed on the side of the steel sheet pile 2 away from the foundation pit wall, a plurality of anchor rods 4 which penetrate into the foundation pit wall are inserted through the outer surface of the I-beam 3, a C-shaped slide rail 5 is fixedly installed on the outer surface of the adjacent side of the two structural columns 1, a slider 6 is slidably installed on the inner wall of the two C-shaped slide rails 5, a push plate 7 is fixedly installed between the two sliders 6, the push plate 7 is arranged above the I-beam 3, and a supporting mechanism is installed between the structural column 1 and the push plate 7.

[0030] In this embodiment, the support mechanism includes a connecting plate 8 fixedly installed between multiple steel sheet piles 2 near their bottom outer surfaces, a winding shaft 9 is rotatably installed between the outer surfaces of the two structural columns 1 near the push plate 7, a plurality of steel cables 12 are evenly fixedly installed on the outer surface of the connecting plate 8, a plurality of brackets 13 are evenly fixedly installed on the outer surface of the I-beam 3, and a guide wheel 14 is rotatably installed inside each bracket 13. The end of the steel cable 12 away from the connecting plate 8 bypasses the guide wheel 14 and is fixedly installed on the winding shaft 9 from the side close to the steel sheet pile 2. The outer surface of the winding shaft 9 is evenly fixedly installed with a plurality of six The hexagonal sleeve 15 and the steel cable 12 are wound on the winding shaft 9. During installation, the hexagonal sleeve 15 is clamped by a wrench and rotated to make the winding shaft 9 tighten the steel cable 12 and make the push plate 7 abut against the outer surface of the steel sheet pile 2. A pushing component is installed between the winding shaft 9 and the push plate 7. The pushing component includes a plurality of transmission racks 11 uniformly and fixedly installed on the outer surface of the push plate 7. A plurality of transmission gears 10 matching the transmission racks 11 are uniformly and fixedly installed on the outer surface of the winding shaft 9. The transmission gears 10 are meshed with the transmission racks 11. A non-return component is installed between the structural column 1 and the winding shaft 9.

[0031] When the pit wall collapses, the soil will produce an outward squeezing force on the upper part of the steel sheet pile 2, causing the steel sheet pile 2 to tilt outward. At this time, the lower part of the steel sheet pile 2 will move inward, causing the connecting plate 8 installed on the outer side of the lower part of the steel sheet pile 2 to also be displaced. Through the traction of multiple steel cables 12, the connecting plate 8 will drive the winding shaft 9 to rotate. Multiple transmission gears 10 are installed on the outer surface of the winding shaft 9. These transmission gears 10 are engaged with the transmission rack 11, thereby pushing the push plate 7 to move toward the steel sheet pile 2. The push plate 7 applies force through the outward-tilted steel sheet pile 2 to help push the steel sheet pile 2 back to the pit wall, thereby effectively supporting the collapsed pit wall and improving the support effect of the pit.

[0032] In this embodiment, the non-return assembly includes a non-return wheel 16 fixedly installed on the outer surface of both ends of the winding shaft 9, and a plurality of trapezoidal slots 17 are evenly opened on the outer circumference of the non-return wheel 16, and the trapezoidal slots 17 are of a right-angled trapezoidal structure. A fixed block 18 is fixedly installed on the outer surface of the structural column 1 near the non-return wheel 16, and a plurality of limiting rods 19 are inserted through the outer surface of the fixed block 18 from top to bottom. A trapezoidal block 20 matching the trapezoidal slot 17 is fixedly installed on the top of the plurality of limiting rods 19, and a limiting block 21 is fixedly installed on the bottom end of the plurality of limiting rods 19. The outer surfaces of the plurality of limiting rods 19 are all sleeved with compression springs 22, and the compression springs 22 are arranged between the bottom of the trapezoidal block 20 and the top of the fixed block 18.

[0033] When the winding shaft 9 rotates, the check wheel 16 will be driven to rotate synchronously. Since a trapezoidal slot 17 is provided on the outer periphery of the check wheel 16, when the check wheel 16 rotates, the trapezoidal block 20 will be pushed downward, so that the multiple trapezoidal slots 17 provided on the outer periphery of the check wheel 16 will successively pass over the trapezoidal block 20. When the check wheel 16 stops rotating, the trapezoidal block 20 will reset upward under the elastic force of the compression spring 22, so that the trapezoidal block 20 will be stuck in the trapezoidal slot 17 again, so that the trapezoidal block 20 limits the check wheel 16, preventing the check wheel 16 and the winding shaft 9 from reversing and affecting the supporting effect of the push plate 7 on the steel sheet pile 2.

[0034] In this embodiment, a warning mechanism is installed between the two structural columns 1 and the push plate 7, and the warning mechanism includes a horizontal plate 23 fixedly installed between the two structural columns 1, and a plurality of liquid storage cylinders 24 are evenly fixedly installed on the upper surface of the horizontal plate 23, and the interior of the liquid storage cylinder 24 is filled with liquid pigment with eye-catching colors; a spray head 25 connected to the interior of the liquid storage cylinder 24 is fixedly installed at one end of the liquid storage cylinder 24 close to the steel sheet pile 2, and an extrusion assembly is installed between the liquid storage cylinder 24 and the push plate 7, and the extrusion assembly includes a piston 26 slidably installed on the inner wall of the liquid storage cylinder 24, and a push rod 27 is fixedly installed on the outer surface of the piston 26 away from the liquid storage cylinder 24, and a fixed plate 28 is fixedly installed on the end of the push rod 27 away from the piston 26, and a plurality of mounting plates 29 are fixedly installed between the fixed plate 28 and the push plate 7.

[0035] After the structural column 1, steel sheet pile 2, I-beam 3 and supporting mechanism are installed, the warning mechanism is installed so that the installation position of the warning mechanism can be determined after the initial position of the push plate 7 is determined; when the push plate 7 moves toward the steel sheet pile 2, the piston 26 is pushed by the mounting plate 29, the fixing plate 28 and the push rod 27, so that the piston 26 can squeeze out the eye-catching color pigment filled in the liquid storage cylinder 24 through the spray head 25 and spray it on the surface of the steel sheet pile 2, reminding the construction personnel that there is a risk of collapse of the foundation pit wall in this area, so as to achieve the effect of warning the construction personnel.

[0036] In this embodiment, a limiting angle iron 30 is fixedly installed on the outer surface of the structural column 1 close to the connecting plate 8; after the connecting plate 8 is installed, the limiting angle iron 30 is installed on the structural column 1 using screws so that the limiting angle iron 30 abuts against the outer side of the connecting plate 8, thereby achieving the effect of limiting the connecting plate 8.

[0037] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: during installation, the structural column 1 is first cast at the corner of the foundation pit, and then the I-beam 3 and the plurality of steel sheet piles 2 are spliced ​​and installed between the two structural columns 1, and then the anchor rod 4 is passed through the I-beam 3 and inserted into the wall of the foundation pit, so as to achieve the supporting effect of the foundation pit;

[0038] When the pit wall collapses, the soil will produce an outward squeezing force on the upper part of the steel sheet pile 2, causing the steel sheet pile 2 to tilt outward. At this time, the lower part of the steel sheet pile 2 will move inward, causing the connecting plate 8 installed on the outer side of the lower part of the steel sheet pile 2 to also move. Through the traction of multiple steel cables 12, the connecting plate 8 will drive the winding shaft 9 to rotate. Multiple transmission gears 10 are installed on the outer surface of the winding shaft 9. These transmission gears 10 are engaged with the transmission rack 11, thereby pushing the push plate 7 to move toward the steel sheet pile 2. The push plate 7 applies force through the outward-tilted steel sheet pile 2 to help push the steel sheet pile 2 back to the pit wall, thereby effectively supporting the collapsed pit wall and improving the support effect of the pit.

[0039] When the winding shaft 9 rotates, the non-return wheel 16 will be driven to rotate synchronously. Since a trapezoidal slot 17 is provided on the outer periphery of the non-return wheel 16, when the non-return wheel 16 rotates, the trapezoidal block 20 will be pushed downward, so that the multiple trapezoidal slots 17 provided on the outer periphery of the non-return wheel 16 successively pass over the trapezoidal block 20. When the non-return wheel 16 stops rotating, the trapezoidal block 20 will be reset upward under the elastic force of the compression spring 22, so that the trapezoidal block 20 is again stuck in the trapezoidal slot 17, so that the trapezoidal block 20 limits the non-return wheel 16, and prevents the non-return wheel 16 and the winding shaft 9 from reversing, which affects the supporting effect of the push plate 7 on the steel sheet pile 2.

[0040] When the push plate 7 moves toward the steel sheet pile 2, the piston 26 will be pushed through the mounting plate 29, the fixing plate 28 and the push rod 27, so that the piston 26 can squeeze out the eye-catching color pigment filled in the liquid storage cylinder 24 through the spray head 25 and spray it on the surface of the steel sheet pile 2, reminding the construction personnel that there is a risk of collapse of the foundation pit wall in this area, so as to achieve the effect of warning the construction personnel.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined flexible self-balancing foundation pit support device, comprising two structural columns (1) pre-buried at the corners of a foundation pit, a plurality of steel sheet piles (2) spliced ​​together are installed between the two structural columns (1), an I-beam (3) is also fixedly installed between the two structural columns (1), the I-beam (3) is installed on the side of the steel sheet pile (2) away from the foundation pit wall, and a plurality of anchor rods (4) deeply inserted into the foundation pit wall are inserted through the outer surface of the I-beam (3), characterized in that: The outer surfaces of the adjacent sides of the two structural columns (1) are fixedly mounted with C-shaped slide rails (5), the inner walls of the two C-shaped slide rails (5) are slidably mounted with sliders (6), a push plate (7) is fixedly mounted between the two sliders (6), the push plate (7) is arranged above the I-beam (3), and a support mechanism is installed between the structural column (1) and the push plate (7).

2. The combined flexible self-balancing foundation pit supporting device according to claim 1 is characterized in that: The support mechanism comprises a connecting plate (8) fixedly mounted between the outer surfaces of the bottoms of a plurality of steel sheet piles (2), a winding shaft (9) rotatably mounted between the outer surfaces of the two structural columns (1) near the push plates (7), a plurality of steel cables (12) evenly and fixedly mounted on the outer surface of the connecting plate (8), a plurality of brackets (13) evenly and fixedly mounted on the outer surface of the I-beam (3), a guide wheel (14) rotatably mounted inside each of the brackets (13), an end of the steel cable (12) away from the connecting plate (8) bypasses the guide wheel (14) and is fixedly mounted on the winding shaft (9) from the side close to the steel sheet piles (2), and a pushing assembly is installed between the winding shaft (9) and the push plate (7).

3. The combined flexible self-balancing foundation pit supporting device according to claim 2 is characterized in that: The pushing assembly comprises a plurality of transmission racks (11) uniformly fixedly mounted on the outer surface of the pushing plate (7); a plurality of transmission gears (10) matching the transmission racks (11) are uniformly fixedly mounted on the outer surface of the winding shaft (9); the transmission gears (10) are meshed with the transmission racks (11); and a non-return assembly is installed between the structural column (1) and the winding shaft (9).

4. The combined flexible self-balancing foundation pit supporting device according to claim 3 is characterized in that: The non-return assembly comprises a non-return wheel (16) fixedly mounted on the outer surfaces of both ends of the winding shaft (9), a plurality of trapezoidal slots (17) being evenly arranged on the outer circumference of the non-return wheel (16), a fixing block (18) being fixedly mounted on the outer surface of the structural column (1) close to the non-return wheel (16), a plurality of limiting rods (19) being inserted through the outer surface of the fixing block (18) from top to bottom, a trapezoidal block (20) matching the trapezoidal slots (17) being fixedly mounted on the top ends of the plurality of limiting rods (19), and a limiting block (21) being fixedly mounted on the bottom ends of the plurality of limiting rods (19).

5. The combined flexible self-balancing foundation pit supporting device according to claim 4 is characterized in that: The outer surfaces of the plurality of limit rods (19) are sleeved with compression springs (22), and the compression springs (22) are arranged between the bottom of the trapezoidal clamping block (20) and the top of the fixed block (18).

6. The combined flexible self-balancing foundation pit supporting device according to claim 1 is characterized in that: A warning mechanism is installed between the two structural columns (1) and the push plate (7), and the warning mechanism includes a transverse plate (23) fixedly installed between the two structural columns (1), and a plurality of liquid storage cylinders (24) are evenly fixedly installed on the upper surface of the transverse plate (23), and a spray head (25) connected to the interior of the liquid storage cylinder (24) is fixedly installed at one end of the liquid storage cylinder (24) close to the steel sheet pile (2), and an extrusion assembly is installed between the liquid storage cylinder (24) and the push plate (7).

7. The combined flexible self-balancing foundation pit supporting device according to claim 6 is characterized in that: The extrusion assembly comprises a piston (26) slidably mounted on the inner wall of a liquid storage cylinder (24); a push rod (27) is fixedly mounted on the outer surface of the piston (26) away from the liquid storage cylinder (24); a fixed plate (28) is fixedly mounted on the end of the push rod (27) away from the piston (26); and a plurality of mounting plates (29) are fixedly mounted between the fixed plate (28) and the push plate (7).

8. The combined flexible self-balancing foundation pit supporting device according to claim 1 is characterized in that: The structural column (1) is fixedly mounted with a limiting angle iron (30) on the outer surface close to the connecting plate (8).

9. The combined flexible self-balancing foundation pit supporting device according to claim 2, characterized in that: A plurality of hexagonal sleeves (15) are evenly and fixedly mounted on the outer surface of the winding shaft (9).

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