A soil nailing wall support and drainage structure for foundation pits

Abstract

This utility model discloses a drainage structure for foundation pit soil nailing wall support, relating to the field of building drainage structure technology. It aims to solve the technical problems of existing foundation pit soil nailing wall support drainage devices being inconvenient for quick dredging, maintenance, and replacement, and failing to prevent backflow of accumulated water in the foundation pit. The structure includes a drainage component, comprising several components spaced apart on the support component. Each drainage component is inclined downwards with its drainage end located at the lowest point. Each drainage component includes an outer sleeve, which is fixedly inserted through the support component into the foundation pit slope. An inner cylinder component is threadedly connected to the inner sleeve, and the drainage end of the inner cylinder component extends out of the outer sleeve. This utility model, by setting a detachable sleeve-type drainage component with an inner cylinder component containing a built-in filter connected to the inner sleeve, facilitates quick and easy disassembly of the inner cylinder component for cleaning, dredging, maintenance, or replacement. Furthermore, a one-way drainage mechanism is installed at the end of the drainage pipe to prevent backflow of accumulated water in the foundation pit.

Description

Technical Field

[0001] This utility model relates to the technical field of building drainage structures, and in particular to a foundation pit soil nailing wall support drainage structure. Background Technology

[0002] Soil nailing wall support is a common foundation pit support technology, mainly used to prevent the foundation pit from collapsing, deforming, or exceeding design requirements during excavation. Existing foundation pit soil nailing wall support drainage generally involves designing drainage holes or drainage pipes during the construction of the soil nailing wall.

[0003] Existing foundation pit soil nailing wall support drainage devices filter silt and sand by placing external filter components such as gravel and filter cloth on the drainage pipe to prevent silt and sand from flowing into the drainage pipe with the water and clogging it. However, these devices have the following drawbacks: the external filter components are buried in the foundation pit slope, the filter cloth is easily damaged after a long service life, making it inconvenient to quickly dredge, repair, and replace it. Furthermore, in extreme weather conditions such as continuous heavy rain, a large amount of water accumulated in the foundation pit can easily backflow from the drainage pipe outlet. In view of these issues, we propose a foundation pit soil nailing wall support drainage structure. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a foundation pit soil nailing wall support and drainage structure.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A soil nailing wall support and drainage structure for foundation pits includes a support component and drainage components spaced apart on the support component, wherein the drainage components are inclined downward and the drainage end is located at a low position.

[0007] The drainage assembly includes an outer sleeve and an inner sleeve assembly. The outer sleeve penetrates the support assembly and is inserted into the slope of the foundation pit. One end of the inner sleeve assembly is inserted into the outer sleeve and is detachably connected to the outer sleeve.

[0008] The inner cylinder assembly has a filter unit at the higher end, and the outer cylinder has a drain hole in the area corresponding to the filter unit.

[0009] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Further, the filter unit includes a filter screen cylinder, with one end of the filter screen cylinder at a higher position open and the other end equipped with a filter screen. The filter screen cylinder is filled with filter filler, and a drainage pipe is fixedly connected to the lower end of the filter screen cylinder.

[0010] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Furthermore, the drainage end of the drainage pipe is provided with a one-way drainage mechanism.

[0011] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Furthermore, the unidirectional drainage mechanism includes a cover plate, which is hinged to the top of the drainage end of the drainage pipe.

[0012] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Furthermore, the drainage end opening of the drainage pipe is obliquely cut, and the cover plate is perpendicular to the ground and adapted to the obliquely cut opening of the drainage end of the drainage pipe.

[0013] This utility model discloses a foundation pit soil nailing wall support drainage structure. Furthermore, the end of the cover plate facing the drainage pipe is provided with a sealing ring.

[0014] This utility model discloses a foundation pit soil nailing wall support drainage structure. Furthermore, the inner side wall of the outer cylinder near the opening is provided with an internal thread, and the outer side wall of the drainage pipe is provided with an external thread that matches the internal thread of the outer cylinder.

[0015] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Furthermore, the drainage end of the drainage pipe extends through the outer sleeve, and a screw ring is installed on the side wall of the area extending through the outer sleeve.

[0016] This utility model discloses a soil nailing wall support and drainage structure for foundation pits. Further, the support components include a shotcrete surface layer disposed on the side of the foundation pit slope, a steel mesh disposed between the side of the foundation pit slope and the shotcrete surface layer, and soil nails driven through the shotcrete surface layer into the foundation pit slope. A drainage ditch is provided at the bottom of the foundation pit slope.

[0017] This utility model discloses a drainage structure for foundation pit soil nailing wall support. Further, the outer sleeve includes an outer cylinder, the drainage hole is provided on the surface of the outer cylinder, and a cone head is provided at the high end of the outer cylinder.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] 1. This utility model solves the problem of inconvenient and quick dredging, maintenance and replacement of existing foundation pit soil nailing wall support drainage devices by setting a detachable sleeve-type drainage component with an inner cylinder component that has a built-in filter component connected to the inner cylinder component in the inner thread of the outer cylinder.

[0020] 2. This utility model also includes a one-way drainage mechanism installed at the end of the drainage pipe. The drainage pipe opening is obliquely cut with the downward-sloping drainage end, and the cover plate is elliptical and fits the oblique cut of the drainage pipe opening. Under normal conditions, under its own weight, it covers the drainage pipe opening perpendicular to the ground, preventing water from backflowing into the foundation pit. This further solves the problem of excessive water accumulation and backflow in the foundation pit when the existing foundation pit soil nailing wall support drainage device encounters extreme weather.

[0021] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present utility model;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0025] Figure 4 for Figure 2 A schematic diagram of the structure at point B.

[0026] Figure label:

[0027] 1. Support assembly; 2. Drainage assembly; 3. Outer sleeve; 4. Inner cylinder assembly; 101. Shotcrete surface layer; 102. Drainage ditch; 103. Soil nail; 104. Reinforcing mesh; 301. Outer cylinder; 302. Drainage hole; 303. Cone head; 401. Filter cylinder; 402. Filter screen; 403. Filter filler; 404. Drainage pipe; 405. Tightening ring; 406. Cover plate; 407. Sealing ring. Detailed Implementation

[0028] like Figures 1 to 4 As shown, the present invention relates to a foundation pit soil nailing wall support drainage structure, including a drainage component 2. There are several drainage components 2 distributed at intervals on the support component 1. The drainage components 2 are inclined downward and the drainage end is located at the low position.

[0029] The drainage component 2 includes an outer sleeve 3, which is fixedly inserted into the slope of the foundation pit through the support component 1. An inner sleeve component 4 is connected to the inner sleeve 3 by internal threads, and the drainage end of the inner sleeve component 4 extends out of the outer sleeve 3.

[0030] The inner cylinder assembly 4 includes a filter cylinder 401, with one end of the filter cylinder 401 open at the higher position. A filter screen 402 is installed inside the other end of the filter cylinder 401, and the filter cylinder 401 is filled with filter filler 403. The filter cylinder 401, filter screen 402, and filter filler 403 form a filter unit. A drain pipe 404 is fixedly connected to the lower end of the filter cylinder 401, and a one-way drainage mechanism is installed at the end of the drain pipe 404. This utility model, by setting a detachable sleeve-type drainage assembly 2 for the inner cylinder, and the inner cylinder assembly 4 with a built-in filter assembly threaded inside the outer sleeve 3, facilitates quick and easy disassembly of the inner cylinder assembly 4 for cleaning, unblocking, or repair and replacement. Furthermore, by installing a one-way drainage mechanism at the end of the drain pipe 404, it prevents water from backflowing into the foundation pit.

[0031] Furthermore, the support component 1 includes a shotcrete surface layer 101, which is set on the side of the foundation pit slope and reinforced with a steel mesh 104 between it and the foundation pit slope. Several soil nails 103 are spaced apart on the shotcrete surface layer 101. A drainage ditch 102 is set at the bottom of the slope on the side of the shotcrete surface layer 101 away from the foundation pit slope. The soil nails 103 provide the main support, improve soil strength, disperse stress, and resist shear and overturning. The steel mesh 104 enhances tensile strength, maintains integrity, and plays a role in separation and reinforcement. It can also connect the soil nails 103 to the concrete wall. The combination of soil nails 103 and steel mesh 104 improves the overall stability and safety of the foundation pit.

[0032] Furthermore, the outer sleeve 3 includes an outer cylinder 301, the surface of which is provided with a number of drainage holes 302, and a cone head 303 is fixedly connected to one end of the outer cylinder 301 at a high position. The cone head 303 at the end of the outer sleeve 3 facilitates quick drilling into the slope of the foundation pit.

[0033] Furthermore, a screw ring 405 is fixedly installed on the outer wall of the outer cylinder 301 area where the drain end of the drain pipe 404 extends, which facilitates quick screwing of the drain pipe 404 and quick installation or removal.

[0034] Furthermore, the drainage end opening of the drainage pipe 404 is beveled and the top is hinged with a cover plate 406. The cover plate 406 is perpendicular to the ground and fits the beveled opening of the drainage end of the drainage pipe 404. A sealing ring 407 is glued to the end of the cover plate 406 facing the drainage pipe 404. Under normal conditions, under its own weight, it covers the drainage end opening of the drainage pipe 404 perpendicular to the ground to prevent water from flowing back into the pit.

[0035] Furthermore, the inner wall of the outer cylinder 301 near the opening is provided with an internal thread, and the outer wall of the drain pipe 404 is provided with an external thread that can be matched with the internal thread of the outer cylinder 301, which facilitates quick disassembly and assembly.

[0036] Working principle: In use, this utility model features a detachable inner sleeve-type drainage component 2, with an inner cylinder component 4 containing a built-in filter component threaded into the inner sleeve 3. This allows for quick and easy disassembly of the inner cylinder component 4 for cleaning, unclogging, or repair and replacement. Furthermore, a one-way drainage mechanism is installed at the end of the drainage pipe 404. The drainage end of the downward-sloping drainage pipe 404 has an obliquely cut opening, and the elliptical cover plate 406 is adapted to fit the obliquely cut opening of the drainage pipe 404. Under normal conditions, under its own weight, it perpendicularly covers the drainage end opening of the drainage pipe 404, preventing backflow of water into the foundation pit. The outer sleeve 3 is pre-drilled into the foundation pit slope from a pre-drilled hole in the shotcrete surface layer 101, tilted upwards. The cone-shaped head 303 at the end of the outer sleeve 3 facilitates quick and easy drilling into the foundation pit slope. Inside the slope, the opening at the tail of the outer sleeve 3 is exposed. The inner sleeve assembly 4 is then assembled into the outer sleeve 3. Under normal conditions, under its own weight, it perpendicularly covers the drainage end opening of the drainage pipe 404, preventing water from flowing back into the pit. Water from the slope of the pit enters through several drainage holes 302 on the outer sleeve 3, undergoes preliminary filtration by the filter screen 401, and further filtration by the filter filler 403 (such as gravel). It then flows through the filter screen 402 into the drainage pipe 404. Because the drainage end opening of the drainage pipe 404 is beveled and a cover plate 406 is hinged to the top, the cover plate 406 is perpendicular to the ground and fits the beveled opening of the drainage end of the drainage pipe 404. A sealing ring 407 is glued to the end of the cover plate 406 facing the drainage pipe 404. The cover plate 406 is made of a lightweight material. The hinge is made of a smooth-opening and rust-resistant material, such as a stainless steel hinge. It requires minimal water to open the cover 406. When the amount of water is insufficient to open the cover 406 and cannot flow out from the gap between the cover 406 and the drain pipe 404, it accumulates at the drain pipe 404 until a sufficient amount of water is accumulated to open the cover 406 and drain smoothly. When the water reaches the drain outlet, it pushes open the cover 406 and flows out. When the filter components inside the inner cylinder assembly 4, i.e., the filter cylinder 401, filter screen 402, or filter filler 403, are clogged with excessive sediment, the inner cylinder assembly 4 can be unscrewed by holding the screw ring 405. Water can then be used to clean the filter cylinder 401, filter screen 402, or filter filler of the inner cylinder assembly 4. Rinse the filter media 403 thoroughly, or empty and replace the filter media 403 (the filter screen 401 has an opening at the higher end for quick replacement). This allows for quick cleaning or maintenance of the inner cylinder assembly 4, preventing blockage of the drainage assembly 2. Finally, reinstall the inner cylinder assembly 4 into the outer cylinder 3. In extreme weather conditions, when there is a large amount of water in the pit that has overflowed the drainage end of the inner cylinder assembly 4, under normal conditions, it will cover the drainage end opening of the drainage pipe 404 vertically under its own weight. The end of the cover plate 406 facing the drainage pipe 404 is bonded with a sealing ring 407. The external water will press the cover plate 406 against the drainage end opening of the drainage pipe 404, making the cover plate 406 more tightly cover the drainage end opening of the drainage pipe 404. The sealing ring 407 further prevents backflow of water.

[0037] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model. The embodiments described above are merely preferred implementations of this utility model and are not intended to limit the scope of this utility model. Various modifications and improvements made to the technical solutions of this utility model by those skilled in the art without departing from the design spirit of this utility model should fall within the protection scope defined by the claims of this utility model.

Claims

1. A foundation pit soil nailing wall support and drainage structure, comprising a support assembly (1) and drainage assemblies (2) spaced apart on the support assembly (1), characterized in that, The drainage component (2) is inclined downward and the drainage end is located at a low position; The drainage assembly (2) includes an outer sleeve (3) and an inner sleeve assembly (4). The outer sleeve (3) penetrates the support assembly (1) and is inserted into the slope of the foundation pit. One end of the inner sleeve assembly (4) is inserted into the outer sleeve (3) and is detachably connected to the outer sleeve (3). The inner cylinder assembly (4) has a filter unit at the higher end, and the outer cylinder (3) has a drain hole (302) in the area corresponding to the filter unit.

2. The foundation pit soil nailing wall support and drainage structure according to claim 1, characterized in that, The filter unit includes a filter cylinder (401), which is open at one end at a high position and has a filter screen (402) installed at the other end. The filter cylinder (401) is filled with filter filler (403), and a drain pipe (404) is fixedly connected to the lower end of the filter cylinder (401).

3. The foundation pit soil nailing wall support and drainage structure according to claim 2, characterized in that, The drain end of the drain pipe (404) is equipped with a one-way drain mechanism.

4. The foundation pit soil nailing wall support and drainage structure according to claim 3, characterized in that, The one-way drainage mechanism includes a cover plate (406) which is hinged to the top of the drainage end of the drain pipe (404).

5. The foundation pit soil nailing wall support and drainage structure according to claim 4, characterized in that, The drain end opening of the drain pipe (404) is obliquely cut, and the cover plate (406) is perpendicular to the ground and is adapted to the oblique cut of the drain end opening of the drain pipe (404).

6. The foundation pit soil nailing wall support and drainage structure according to claim 5, characterized in that, The end of the cover plate (406) facing the drain pipe (404) is provided with a sealing ring (407).

7. The foundation pit soil nailing wall support and drainage structure according to claim 1, characterized in that, The outer sleeve (3) includes an outer cylinder (301), and the inner side wall of the outer cylinder (301) near the opening is provided with an internal thread. The outer side wall of the drain pipe (404) is provided with an external thread that matches the internal thread of the outer cylinder (301).

8. The foundation pit soil nailing wall support and drainage structure according to claim 7, characterized in that, The drain end of the drain pipe (404) extends out of the outer sleeve (3), and a screw ring (405) is installed on the side wall of the area extending out of the outer sleeve (3).

9. The foundation pit soil nailing wall support and drainage structure according to claim 1, characterized in that, The support assembly (1) includes a shotcrete surface layer (101) set on the side of the foundation pit slope, a steel mesh (104) set between the side of the foundation pit slope and the shotcrete surface layer (101), and soil nails (103) driven through the shotcrete surface layer (101) and driven into the foundation pit slope. A drainage ditch (102) is provided at the bottom of the foundation pit slope.

10. A foundation pit soil nailing wall support and drainage structure according to claim 1, characterized in that, The outer sleeve (3) includes an outer cylinder (301), the drain hole (302) is provided on the surface of the outer cylinder (301), and the outer cylinder (301) is provided with a cone head (303) at the higher end.

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