Anchoring supporting structure utilizing shallow foundation pit in large-height-difference pit-in-pit
By using shallow foundation pit anchor support structures of grating plates, reinforcement plates, positioning components and anchor pulling components in large height difference pits, the problems of poor foundation pit support effect and complex construction in the prior art are solved, and the problem of poor foundation pit support effect and complex construction in the existing technology is achieved. More efficient and economical support and safety.
Patent Information
- Application Number
- CN202421101420.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing foundation pit support structure has poor effect in large height difference pits, complex construction and long cycle, which can easily lead to soil disturbance and instability and collapse of foundation pits, and is costly.
A shallow foundation pit anchor support structure including grating plates, reinforcement plates, positioning components and anchor pulling components is adopted. The positioning components are fixed to the bottom of the pit and the anchor pulling components are anchored to the top of the pit to enhance the stability of the side wall and reduce the soil. Disturbance, simplify construction processes and reduce costs.
It improves the support effect and safety of large-height difference pits, simplifies the construction process, shortens the construction cycle, and reduces costs, avoiding the risks of soil disturbance and foundation pit instability.
Smart Images
Figure CN222295009U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anchor support structure, in particular to an anchor support structure which utilizes a shallow foundation pit in a pit with a large height difference. Background Art
[0002] Pit-in-pit phenomenon occurs in building foundation pits due to the existence of local deep areas such as sump wells and elevator shafts or due to different demands for basement functions. With the development of the construction industry, the development of underground space has become more diversified, and it is particularly common to see large-scale pits with large height differences inside large foundation pits. In the design process of some structures, due to the different functions of towers and podiums or the location of underground stations in basement garages, pits with large height differences of not less than 3m will appear. During the construction process, corresponding support structures are required to support the foundation pits.
[0003] Existing foundation pit support usually involves slope excavation or cement mixing piles or soil nails are placed around the pit, and compaction grouting is performed at the bottom of the pit to prevent groundwater seepage so that construction can be carried out in a dry environment. These foundation pit support structures have certain disadvantages when used. The foundation pit support structure is single, and its effect of supporting and protecting the foundation pit is poor. In addition, the existing support structure construction method is relatively complex and the construction period is long. For example, in the process of slope excavation of a large height difference pit in an already excavated foundation pit, the soil of the already excavated foundation pit will be disturbed, affecting the retaining structure of the original foundation pit, and the pile tops of the already constructed engineering piles will be horizontally displaced, affecting the construction quality of the engineering piles, and in severe cases, causing the foundation pit to become unstable and collapse; when cement mixing piles or soil nails are used for support, there are problems such as complex construction methods, long construction periods, and high costs. Utility Model Content
[0004] At least one of the purposes of the present utility model is to provide an anchor support structure for a pit within a pit with a large height difference using a shallow foundation pit, in order to overcome the problems existing in the above-mentioned prior art, which can improve the support effect of the pit within the pit with a large height difference, reduce the disturbance to the foundation pit soil that has been excavated during the support process, and provide convenient, fast and economical support.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes the following aspects.
[0006] An anchor support structure for a pit within a pit with a large height difference using a shallow foundation pit, characterized in that it comprises: a grating plate, wherein one or more reinforcement plates are arranged on the front side of the grating plate, the rear side of the grating plate is arranged on the side wall of the pit within the pit with a large height difference, the bottom of the reinforcement plate is provided with a positioning component for fixing to the bottom of the pit within the pit with a large height difference, and the top of the reinforcement plate is provided with an anchor support component for anchoring to the top of the pit within the pit with a large height difference.
[0007] As a preferred technical solution of the utility model, a plurality of steel bars are fixedly arranged on the rear side surface of the grid plate, and a metal mesh is fixedly connected to the grid holes of the grid plate.
[0008] As a preferred technical solution of the utility model, the reinforcement plate is a rectangular strip structure or a rectangular plate structure, and a push plate is provided at the bottom of the reinforcement plate, and the push plate is connected to the positioning assembly.
[0009] As a preferred technical solution of the utility model, the positioning assembly includes a positioning plate 1, a plurality of insertion rods are arranged at the bottom of the positioning plate 1, a threaded seat is arranged at the top of the positioning plate 1, a positioning bolt is connected to the inner thread of the threaded seat, and the threaded seat is connected to the push plate by the positioning bolt.
[0010] As a preferred technical solution of the utility model, a strip-shaped through groove penetrating the push plate is provided in the length direction of the push plate.
[0011] As a preferred technical solution of the utility model, the anchor assembly includes a tensioning assembly, an adjustment mechanism and a second positioning plate. The top of the reinforcement plate is connected to the tensioning assembly, the tensioning assembly is connected to the second positioning plate through the adjustment mechanism, and the second positioning plate is anchored at the top of a pit in a pit with a large height difference.
[0012] As a preferred technical solution of the utility model, the anchor assembly includes a pull plate and a connecting plate that are relatively arranged, the pull plate and the connecting plate are connected by one or more anchor cables, and the pull plate is detachably connected to the reinforcement plate; the adjustment mechanism includes one or more screws arranged in parallel, and the positioning plate 2 is an L-shaped structure; the connecting plate is provided with one or more threaded holes that are compatible with the screws, the first end of the screw passes through the threaded hole, and the second end passes through the first side of the positioning plate 2, and the second side of the positioning plate 2 is anchored at the top of the pit in the large height difference pit.
[0013] As a preferred technical solution of the utility model, the screw is connected to the second positioning plate through a rolling bearing, the second end of each screw is fixedly connected to a pulley, and adjacent pulleys are connected through belt transmission.
[0014] As a preferred technical solution of the utility model, one or more sleeve rods are arranged on the surfaces of the pull plate and the connecting plate close to each other, and the reinforcing plate is provided with sleeve holes near the top, and the sleeve holes are sleeved with the sleeve rods.
[0015] As a preferred technical solution of the utility model, one or more mounting holes are provided on the second side of the second positioning plate, and the mounting holes are socketed with ground nails.
[0016] In summary, due to the adoption of the above technical solution, the utility model has at least the following beneficial effects:
[0017] By arranging grating plates, reinforcement plates, positioning components and anchoring components, the positioning components are fixed to the bottom of the pit in the large height difference pit, and the anchoring components are anchored to the top of the pit in the large height difference pit (which is also the bottom of the shallow foundation pit), the stability of the grating plates on the side walls of the pit in the large height difference pit can be enhanced, and the protection effect of the foundation pit can be improved; under the action of the anchoring components, the disturbance of the top soil of the pit in the large height difference pit can be further reduced, and the safety of the foundation pit protection can be improved; the construction method of using the anchoring support structure of the shallow foundation pit for foundation pit protection in the large height difference pit is simple and fast, with controllable costs and high economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of an exemplary embodiment of the utility model using an anchor support structure of a shallow foundation pit in a pit with a large height difference.
[0019] Figure 2 It is a schematic diagram of the push plate structure of an exemplary embodiment of the utility model.
[0020] Figure 3 It is a schematic diagram of the structure of the positioning component of an exemplary embodiment of the utility model.
[0021] Figure 4 It is a schematic diagram of the reinforcement plate structure of an exemplary embodiment of the utility model.
[0022] Figure 5 It is a schematic diagram of the structure of an anchor pull assembly of an exemplary embodiment of the utility model.
[0023] Markings in the figure: 1-grating plate, 2-rebar, 3-metal mesh, 4-reinforcement plate, 5-push plate, 6-positioning plate one, 7-insertion rod, 8-pull plate, 9-connecting plate, 10-through groove, 11-positioning bolt, 12-threaded seat, 13-throwing hole, 14-anchor cable, 15-throwing rod, 16-screw, 17-threaded hole, 18-mounting hole, 19-ground nail, 20-pulley, 21-positioning plate two. DETAILED DESCRIPTION
[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments to make the purpose, technical solutions and advantages of the present invention more clearly understood. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0025] See also Figure 1-Figure 5 The utility model provides an anchor support structure for a pit in a pit with a large height difference using a shallow foundation pit, comprising a grid plate 1, a front side surface of the grid plate 1 (reference Figure 1One or more reinforcement plates 4 are arranged in the front-to-back direction, the front side and the rear side are the two opposite surfaces of the grille plate, the rear side of the grille plate 1 is arranged on the side wall of the pit in the pit with a large height difference, the bottom of the reinforcement plate 4 is provided with a positioning component for fixing to the bottom of the pit in the pit with a large height difference, and the top of the reinforcement plate 4 is provided with an anchoring component for anchoring to the top of the pit in the pit with a large height difference.
[0026] After excavating a large height difference pit in a shallow foundation pit (a foundation pit that has been excavated and whose drop depth is less than 3m), the rear side of the grid plate 1 is fitted on the side wall of the large height difference pit to protect the large height difference pit. During the protection process, the soil of the excavated foundation pit will not be disturbed. The use of grid plates for protection is convenient and fast, which can shorten the protection period and is highly economical. A reinforcement plate 4 is set on the front side of the grid plate. After the top and bottom of the reinforcement plate 4 are connected to the anchor assembly and the positioning assembly respectively, the positioning assembly is fixed to the bottom of the large height difference pit, and the anchor assembly is anchored to the top of the large height difference pit (the bottom of the shallow foundation pit), which can enhance the stability of the grid plate 1 on the side wall of the large height difference pit and improve the foundation pit protection effect; under the action of the anchor assembly, the disturbance of the top soil of the large height difference pit can be further reduced, and the safety of foundation pit protection can be improved.
[0027] The reinforcing plate 4 may be a rectangular strip structure. When the reinforcing plate 4 is a rectangular strip structure, multiple (may be 2, 3, 4 or more) reinforcing plates 4 are evenly arranged on the front side of the grid plate 1, and each reinforcing plate 4 is arranged along the height direction of the grid plate; the reinforcing plate 4 may also adopt an integral rectangular plate structure. The integral reinforcing plate 4 is arranged on the front side of the grid plate 1 and arranged along the height direction of the grid plate 1. The integral reinforcing plate 4 can improve the stability of the fixing of the grid plate 1. The height of the reinforcing plate 4 is higher than that of the grid plate 1, so as to facilitate the connection of the anchor assembly on the top of the reinforcing plate 4; the reinforcing plate 4 may be directly overlapped on the front side of the grid plate 1, or may be fixedly connected to the front side of the grid plate 1.
[0028] A push plate 5 is provided at the bottom of the reinforcement plate 4. The push plate 5 can be perpendicular to the reinforcement plate 4 so that the reinforcement plate 4 is suitable for a vertical side wall. The push plate 5 can also be inclined at an angle with the reinforcement plate 4 so that the reinforcement plate 4 is suitable for an inclined side wall. The first end of the push plate 5 is fixedly connected to the reinforcement plate 4, and the push plate 5 is used to connect with the positioning assembly. When the reinforcement plate 4 adopts an integral rectangular plate structure, the push plate 5 extends along the width direction of the reinforcement plate 4. The utility model preferably adopts a reinforcement plate 4 with a rectangular strip structure.
[0029] A plurality of steel bars 2 are fixedly arranged on the rear side surface of the grating plate 1. The steel bars 2 are preferably evenly arranged on the rear side surface of the grating plate 1. After the steel bars 2 are nailed into the side wall of the pit in the pit with a large height difference, the stability of the grating plate 1 on the side wall of the pit in the pit with a large height difference can be improved; a metal mesh 3 is fixedly connected to each grating hole of the grating plate 1. By arranging a plurality of metal meshes 3 in the grating plate 1, the side wall of the foundation pit can be closed and protected by utilizing the cooperation of the metal mesh 3 and the grating plate 1.
[0030] refer to Figure 1 , Figure 3 The positioning assembly includes a positioning plate 6, and a plurality of plug rods 7 are arranged at the bottom of the positioning plate 6. The plug rods 7 are used to fix the positioning plate 6 at the bottom of the pit in the large height difference pit. A threaded seat 12 is arranged at the top of the positioning plate 6. The threaded seat 12 is internally threaded with a positioning bolt 11, and the threaded seat 12 is connected to the push plate 5 through the positioning bolt 11. The number of threaded seats 12 corresponds to the number of push plates 5. A through groove 10 penetrating the push plate 5 is arranged near the second end of the push plate 5. After the positioning bolt 11 passes through the through groove 10, it is connected to the threaded seat 12, so that the push plate 5 overlaps with the threaded seat 12. The through groove 10 can also be a strip structure extending from the second end of the push plate 5 to the first end (the length direction of the push plate). When the position of the positioning assembly is fixed, the position of the push plate 5 can be adjusted through the through groove 10 to enhance the flexibility of the connection between the fixed plate 4 and the positioning assembly.
[0031] The anchor assembly includes a tie assembly, an adjustment mechanism and a second positioning plate 21. The top of the reinforcement plate 4 is connected to the tie assembly, and the tie assembly is connected to the second positioning plate 21 through the adjustment mechanism. The second positioning plate 21 is anchored at the top of the pit in the large height difference pit. After the second positioning plate 21 is fixed, the distance between the tie assembly and the second positioning plate 21 can be adjusted through the adjustment mechanism, thereby improving the stability of the top structure of the reinforcement plate 4 and the grid plate 1, and improving the stability of the foundation pit protection.
[0032] The anchor assembly includes a pull plate 8 and a connecting plate 9 which are arranged opposite to each other. The pull plate 8 and the connecting plate 9 are connected by one or more anchor cables 14. The pull plate 8 is detachably connected to the reinforcing plate 4. A sleeve hole 13 is provided near the top of the reinforcing plate 4. The pull plate 8 and the reinforcing plate 4 can be connected by bolts, or one or more sleeve rods 15 can be provided on the surfaces of the pull plate 8 and the connecting plate 9 which are close to each other, so that the sleeve rods 15 are sleeved with the sleeve holes 13 on the reinforcing plate 4. The adjustment mechanism includes one or more screw rods 16 arranged in parallel. The connecting plate 9 is provided with one or more threaded holes 17 which are matched with the screw rods 16. The first end of the screw rod 16 passes through the threaded hole 17 and is threadedly connected with the connecting plate. The second end of the screw rod 16 passes through the second positioning plate 21. The second positioning plate 21 is an L-shaped structure. The second end of the screw rod 16 passes through the first side of the second positioning plate 21. The second side of the second positioning plate 21 is anchored at the top of the pit in the large height difference pit.
[0033] The second end of the screw rod 16 is an optical axis end, and the second end of the screw rod 16 is connected to the second positioning plate 21 through a rolling bearing. After each screw rod 16 passes through the second positioning plate 21, its second end is also fixedly connected to a pulley 20. When multiple screw rods 16 are provided (the number of screw rods 16 is preferably two), adjacent pulleys 20 are connected by belt transmission. By rotating one of the pulleys 20, the two screw rods 16 can be rotated synchronously, thereby adjusting the distance between the tie assembly and the second positioning plate 21.
[0034] One or more mounting holes 18 are also provided on the second side of the second positioning plate 21 , and the mounting holes 18 are sleeved with the ground nails 19 , so as to anchor the second positioning plate 21 at the top of the pit in the pit with a large height difference.
[0035] The operation steps of the anchor support structure of the utility model using a shallow foundation pit in a pit with a large height difference are as follows:
[0036] When using the anchor support structure to protect the foundation pit, the user can insert the steel bar 2 into the side wall of the foundation pit to install the grid plate 1, and insert the insertion rod 7 into the bottom of the foundation pit to fix the positioning plate 6, and then the user contacts the reinforcement plate 4 with the grid plate 1, so that the bottom surface of the push plate 5 contacts the threaded seat 12. At this time, the user pushes the push plate 5 and the reinforcement plate 4 to approach the grid plate 1, and takes the pull plate 8 to insert the sleeve rod 15 into the sleeve hole 13. Then the user places the positioning plate 21 on the ground above the foundation pit, and uses the ground nail 19 to insert the installation hole 18 to fix the positioning plate 21. At this time, the user can rotate the screw 16 to use the threaded hole 17 to drive the connecting plate 9 to move backward. When the connecting plate 9 moves backward, the anchor cable 14 applies a backward pulling force to the pull plate 8 and the reinforcement plate 4 so that the grating plate 1 is in close contact with the inner wall of the foundation pit. Then the user passes the positioning bolt 11 through the through groove 10 to connect it with the threaded seat 12, and rotates the positioning bolt 11 to move the positioning bolt 11 into the threaded seat 12. When the top of the positioning bolt 11 contacts the push plate 4, stop rotating the positioning bolt 11.
[0037] The above is only a detailed description of the specific implementation of the utility model, rather than a limitation of the utility model. Various substitutions, modifications and improvements made by technicians in the relevant technical field without departing from the principle and scope of the utility model should be included in the protection scope of the utility model.
Claims
1. An anchor support structure using a shallow foundation pit in a pit with a large height difference, characterized in that: include: A grating plate (1), wherein one or more reinforcement plates (4) are arranged on the front side of the grating plate (1), the rear side of the grating plate (1) is arranged on the side wall of a pit in a large height difference pit, the bottom of the reinforcement plate (4) is provided with a positioning component for fixing to the bottom of the pit in the large height difference pit, and the top of the reinforcement plate (4) is provided with an anchoring component for anchoring to the top of the pit in the large height difference pit.
2. The anchor support structure for a pit in a pit with a large height difference using a shallow foundation pit according to claim 1 is characterized in that: A plurality of steel bars (2) are fixedly arranged on the rear side of the grid plate (1), and a metal mesh (3) is fixedly connected to the grid holes of the grid plate (1).
3. The anchor support structure for a pit in a pit with a large height difference using a shallow foundation pit according to claim 1 is characterized in that: The reinforcing plate (4) is a rectangular strip structure or a rectangular plate structure, and a push plate (5) is provided at the bottom of the reinforcing plate (4), and the push plate (5) is connected to the positioning assembly.
4. The anchor support structure for a pit in a pit with a large height difference using a shallow foundation pit according to claim 3 is characterized in that: The positioning assembly comprises a positioning plate (6), a plurality of insert rods (7) are arranged at the bottom of the positioning plate (6), a threaded seat (12) is arranged at the top of the positioning plate (6), a positioning bolt (11) is connected to the threaded seat (12) through an internal thread, and the threaded seat (12) is connected to the push plate (5) via the positioning bolt (11).
5. The anchor support structure for a pit in a pit with a large height difference using a shallow foundation pit according to claim 4 is characterized in that: A strip-shaped through groove (10) penetrating the push plate (5) is provided in the length direction of the push plate (5).
6. The anchor support structure for a shallow foundation pit in a pit with a large height difference according to claim 3 is characterized in that: The anchor assembly comprises a tensioning assembly, an adjustment mechanism and a second positioning plate (21); the top of the reinforcement plate (4) is connected to the tensioning assembly; the tensioning assembly is connected to the second positioning plate (21) via the adjustment mechanism; the second positioning plate (21) is anchored at the top of the pit in the large height difference pit.
7. The anchor support structure for a shallow foundation pit in a pit with a large height difference according to claim 6 is characterized in that: The anchor assembly comprises a pull plate (8) and a connecting plate (9) arranged opposite to each other, the pull plate (8) and the connecting plate (9) being connected via one or more anchor cables (14), and the pull plate (8) being detachably connected to the reinforcing plate (4); the adjustment mechanism comprises one or more screw rods (16) arranged in parallel, and the second positioning plate (21) is an L-shaped structure; the connecting plate (9) is provided with one or more threaded holes (17) matched with the screw rods (16), the first end of the screw rod (16) passes through the threaded hole (17), and the second end passes through the first side of the second positioning plate (21), and the second side of the second positioning plate (21) is anchored at the top of the pit in the large height difference pit.
8. The anchor support structure for a shallow foundation pit in a pit with a large height difference according to claim 7 is characterized in that: The screw rod (16) is connected to the second positioning plate (21) via a rolling bearing, and a pulley (20) is fixedly connected to the second end of each screw rod (16), and adjacent pulleys (20) are connected via a belt transmission.
9. The anchor support structure for a shallow foundation pit in a pit with a large height difference according to claim 7, characterized in that: One or more sleeve rods (15) are provided on surfaces of the pull plate (8) and the connection plate (9) close to each other, and a sleeve hole (13) is provided near the top of the reinforcement plate (4), and the sleeve hole (13) is sleeved with the sleeve rod (15).
10. The anchor support structure for a shallow foundation pit in a pit with a large height difference according to claim 7, characterized in that: One or more mounting holes (18) are provided on the second side of the second positioning plate (21), and the mounting holes (18) are sleeved with the ground nails (19).