Construction method of foundation pit slope assembled protection structure

Abstract

The application relates to a construction method of a foundation pit slope assembled protection structure, and the method comprises the following steps: S00, slope excavation and slope edge pressing; S10, soil nail hole or anchor rod hole construction; S20, ecological ring protection slope drainage system construction; S30, soil nail or anchor rod installation; S40, GRF green protection surface layer construction; S50, fixed GRF green protection surface layer; S60, flexible cable net installation; and S70, shaped soil nail connecting sleeve or shaped anchor rod connecting sleeve construction. The application can effectively protect the foundation pit slope from external factors, prevent accidents such as soil collapse or landslide, and has a wide application prospect.

Description

Technical Field

[0001] The present application relates to the field of civil engineering technology, and in particular to a construction method for an assembled protective structure for a foundation pit slope. Background Art

[0002] Foundation pit excavation is a crucial step in construction projects. It not only provides the necessary site conditions for construction but also creates the necessary space for underground structures. However, due to varying geological conditions and the surrounding environment, accidents such as earthwork collapse and landslides often occur during excavation. To prevent these accidents, effective protection of the foundation pit slopes is essential.

[0003] Traditionally, pit slope protection has relied on reinforcement with materials such as concrete or masonry. This approach has drawbacks such as long construction times, high costs, and significant environmental pollution. Furthermore, due to the varying shapes and topography of pit slopes, traditional protection methods are often inadequate for diverse sites. Consequently, a search has begun for more advanced pit slope protection methods.

[0004] With the development of science and technology and the continuous innovation of construction techniques, prefabricated protective structures have emerged. This technology utilizes advanced prefabricated components and assembly processes, allowing for customized design and manufacturing based on the shape of different foundation pit slopes, thereby improving construction efficiency and protective effectiveness. Furthermore, prefabricated protective structures offer advantages such as high flexibility, short construction cycles, and excellent protective effectiveness, making them a popular technology in the field of foundation pit slope protection.

[0005] However, there are few relevant documents available to date that can effectively protect the foundation pit slope from external factors and prevent accidents such as earth collapse or landslide.

[0006] Application Contents

[0007] The purpose of this application is to address the above-mentioned problems existing in the prior art and to provide a construction method for an assembled protective structure for a foundation pit slope.

[0008] In order to achieve the above application objectives, this application adopts the following technical solutions: The construction method of the foundation pit slope prefabricated protective structure includes the following steps:

[0009] S00, Slope excavation and slope pressing:

[0010] Excavate the slope to reveal the top, slope surface, graded platform and slope foot;

[0011] Use steel wire ropes to connect the lifting rings and hoist the prefabricated side panels to the top of the slope, the grading platform and the foot of the slope respectively, and then carry out the side slope pressing construction respectively;

[0012] S10. Construction of soil nail holes or anchor holes:

[0013] According to the positions on the design drawings, dig soil nail holes or anchor holes on the slope top, slope surface, graded platform and slope foot;

[0014] S20, Ecological and Environmental Protection Slope Drainage System Construction:

[0015] Transport the prefabricated ecological and environmental protection slope drainage system to the top of the slope, ensuring that the soil nail holes or anchor holes are aligned with the reserved holes of the ecological and environmental protection slope drainage system;

[0016] S30, soil nail or anchor installation:

[0017] After passing the soil nails or anchor rods through the reserved holes, insert them into the soil nail holes or anchor rod holes;

[0018] S40, GRF green protective surface construction:

[0019] Lay the GRF green protective surface layer on top of the prefabricated drainage board of the ecological environmental protection slope drainage system and pass through the soil nails or anchor rods;

[0020] S50, fixed GRF green protective surface layer:

[0021] Place stones or concrete blocks on the GRF green protective surface layer above the slope top, graded platform and slope foot to stabilize the GRF green protective surface layer;

[0022] S60, installation of flexible cable net:

[0023] Hang the flexible cable net on the slope through soil nails or anchor rods;

[0024] S70, Construction of Standardized Soil Nail Connection Sleeve or Standardized Anchor Rod Connection Sleeve:

[0025] Install the fixing collar between the connection sleeves of the shaped soil nails or the connection sleeves of the shaped anchor rods on the top of the soil nails or anchor rods;

[0026] The fixing rings are connected by connecting rods and then fixed with compression bolts. At the same time, the hooks are hung on the flexible cable net to stabilize the flexible cable net, and the stones or concrete blocks placed on the GRF green protective surface layer are removed.

[0027] Furthermore, in step S00, the prefabricated side plate is a prefabricated concrete side plate or a steel plate side plate or a steel profile side plate, and the prefabricated concrete side plate or the steel plate side plate or the steel profile side plate is provided with a column, and a hanging ring is provided on the top of the column.

[0028] Further, in the step S10, the soil nails or anchor rods are uniformly arranged in the slope body of the slope top, slope surface, stepped platform and slope foot.

[0029] Further, in the step S20, the ecological ring protection slope drainage system comprises a slope surface drainage system and a prefabricated drainage board, and the slope surface drainage system is arranged on the top of the prefabricated drainage board.

[0030] Further, the slope surface drainage system is composed of drainage holes, a top drainage groove, a slope drainage groove and a slope foot drainage groove, the top drainage groove is arranged at the slope top, the slope drainage groove is arranged at the slope surface, the slope foot drainage groove is arranged at the slope foot, and the drainage holes are uniformly arranged on the bottom side of the prefabricated drainage board.

[0031] Further, in the step S70, the shaped soil nail connecting sleeve or the shaped anchor rod connecting sleeve is composed of a fixed sleeve ring, a telescopic pull rod, a butt joint hole and a hook, the telescopic pull rod and the butt joint hole are uniformly arranged along the side of the fixed sleeve ring, and the hook is hung on the flexible cable net.

[0032] Further, the telescopic pull rod is designed in a radial shape, the telescopic pull rod is provided with a hook at the end, and the connecting rod is inserted into the butt joint hole.

[0033] Further, in the step S40, the "Z" shape overlapping is adopted at the overlapping position of the GRF green protection surface layer after passing through the soil nail or anchor rod.

[0034] Compared with the prior art, the application has the following beneficial effects:

[0035] 1. The foundation pit slope assembly type protection structure (prefabricated assembly type edge pressing structure, slope surface flexible cable net protection structure and ecological ring protection slope drainage system) adopted in the application is a new type of foundation pit slope protection system, which can effectively protect the foundation pit slope from external factors, prevent soil collapse or landslide accidents, and has a wide application prospect.

[0036] 2. The advanced prefabricated assembly type edge pressing structure (stand, lifting ring, prefabricated concrete edge pressing plate or steel plate edge pressing plate or profile steel edge pressing plate) is adopted in the application, the prefabricated concrete (steel plate) (profile steel) edge pressing plate is used to realize rapid edge pressing of the slope top, stepped platform and slope foot, recycling is realized, and the construction efficiency is greatly improved.

[0037] 3. The slope surface flexible cable net protection structure (soil nail, flexible cable net, connecting rod, shaped soil nail connecting sleeve, anchor rod and shaped anchor rod connecting sleeve) related to the application is stable by using the GRF green protection surface layer and the shaped soil nail (anchor rod) connecting sleeve, can realize rapid positioning and installation to form a complete protection structure, greatly improves the construction efficiency, and guarantees the protection quality of the slope structure.

[0038] 4. The ecological and environmental protection slope drainage system (slope drainage system, prefabricated assembled drainage board) in this application can be designed and manufactured with corresponding prefabricated components and accessories according to the shape and terrain of the foundation pit slope to achieve rainwater drainage on the slope, effectively reducing landslide accidents and improving slope stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional diagram of the foundation pit prefabricated slope protection construction;

[0040] Figure 2 It is the construction plan of the prefabricated slope protection of the foundation pit;

[0041] Figure 3 It is the plan view of the reinforcement construction at the top of the foundation pit slope;

[0042] Figure 4 It is a three-dimensional diagram of the prefabricated and assembled side pressing construction of the foundation pit slope;

[0043] Figure 5 It is a three-dimensional diagram of the environmental protection drainage system of the foundation pit slope;

[0044] Figure 6 It is a three-dimensional diagram of soil nailing construction on the foundation pit slope;

[0045] Figure 7 This is the left view of the foundation pit prefabricated slope protection construction;

[0046] Figure 8 This is the left view of the prefabricated and assembled side pressing construction of the foundation pit slope;

[0047] Figure 9 This is the left view of the soil nailing construction on the foundation pit slope;

[0048] Figure 10 This is the construction drawing of the connection between the soil nails (anchor rods) and the top of the flexible cable net;

[0049] Figure 11 It is a three-dimensional construction diagram of the top connection of the soil nail (anchor rod);

[0050] Figure 12 This is the right view of the soil nail (anchor rod) top connection construction;

[0051] Figure 13 It is a three-dimensional diagram of the top connector of the soil nail (anchor);

[0052] Figure 14 This is the right view of the top connector of the soil nail (anchor);

[0053] Figure 15 It is the top view of the top connector of the soil nail (anchor);

[0054] Figure 16 It is the construction flow chart of this application.

[0055] In the figure, 1. Slope body; 2. Ecological environmental protection slope drainage system; 3. Flexible cable net; 4. Slope top; 5. Soil nail; 6. Fixed collar; 7. Connecting rod; 8. Slope surface; 9. Grading platform; 10. Slope foot; 11. Drainage hole; 12. Slope drainage system; 13. Standardized soil nail connection sleeve; 14. GRF green protective surface layer; 15. Top drainage trough; 16. Slope diversion trough; 17. Slope foot drainage trough; 18. Precast concrete pressure plate; 19. Column; 20. Lifting ring; 21. Pressed bolt; 22. Telescopic pull rod; 23. Docking hole; 24. Hook; 25. Soil nail hole; 26. Anchor rod; 27. Anchor rod hole; 28. Standardized anchor rod connection sleeve; 29. ​​Steel plate pressure plate; 30. Steel pressure plate; 31. Prefabricated assembled drainage board; 32. Reserved hole. DETAILED DESCRIPTION

[0056] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0057] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting this application.

[0058] like Figures 1 to 15 As shown, the foundation pit slope prefabricated protection structure mainly includes: prefabricated prefabricated pressure structure, slope flexible cable net protection structure and ecological environmental protection slope drainage system 2;

[0059] The prefabricated assembled edge pressing structure is used for the edge pressing construction of the slope top 4, the graded platform 9 and the slope foot 10, and comprises: a column 19, a lifting ring 20, a precast concrete edge pressing plate 18 or a steel edge pressing plate 29 or a profiled steel edge pressing plate 30, a column 19 is provided on the top of the precast concrete edge pressing plate 18 or the steel edge pressing plate 29 or the profiled steel edge pressing plate 30, and a lifting ring 20 is provided on the top of the column 19;

[0060] The slope surface flexible cable net protection structure mainly consists of soil nails 5, flexible cable net 3, connecting rods 7, standardized soil nail connecting sleeves 13, anchor rods 26, and standardized anchor rod connecting sleeves 28. The soil nails 5 or anchor rods 26 are evenly distributed in the slope body 1 at the slope top 4, slope surface 8, grading platform 9 and slope foot 10. The standardized soil nail connecting sleeves 13 or standardized anchor rod connecting sleeves 28 are respectively sleeved on the top of the soil nails 5 or anchor rods 26 and fixed with compression bolts 21. The standardized soil nail connecting sleeves 13 or the standardized anchor rod connecting sleeves 28 are connected as a whole by connecting rods 7.

[0061] The ecological and environmental protection slope drainage system 2 is composed of a slope guide system 12 and a prefabricated assembled drainage board 31. The ecological and environmental protection slope drainage system 2 is arranged at the top of the slope body 1, and the slope guide system 12 is provided on the top of the prefabricated assembled drainage board 31.

[0062] like Figure 16 As shown, the construction method of the foundation pit slope assembled protective structure includes the following steps:

[0063] S00, Slope excavation and slope pressing:

[0064] Excavate the slope 1 to reveal the top 4, slope surface 8, grading platform 9, and slope foot 10.

[0065] Use wire ropes to connect the lifting rings 20 and hoist the prefabricated side panels to the top of the slope 4, the grading platform 9 and the foot of the slope 10 respectively, and then carry out the side slope pressing construction respectively;

[0066] In this embodiment, the prefabricated edge panels are prefabricated concrete edge panels 18 or steel plate edge panels 29 or section steel edge panels 30 .

[0067] S10, soil nail hole 25 or anchor hole 27 construction:

[0068] According to the positions on the design drawings, soil nail holes 25 or anchor holes 27 are dug on the slope body 1 at the slope top 4, slope surface 8, grading platform 9 and slope foot 10;

[0069] In this embodiment, the soil nails 5 or anchor rods 26 are evenly distributed in the slope body 1 including the slope top 4 , the slope surface 8 , the grading platform 9 and the slope foot 10 .

[0070] S20, Ecological Protection Slope Drainage System 2 Construction:

[0071] Transport the prefabricated ecological and environmental protection slope drainage system 2 to the top of the slope body 1, while ensuring that the soil nail holes 25 or anchor holes 27 are aligned with the reserved holes 32 of the ecological and environmental protection slope drainage system 2;

[0072] In this embodiment, the slope drainage system 12 is provided on top of the prefabricated assembled drainage board 31 .

[0073] Among them, the slope drainage system 12 is composed of drainage holes 11, top drainage grooves 15, slope guide grooves 16, and slope foot drainage grooves 17. The top drainage grooves 15 are arranged at the top of the slope 4, the slope guide grooves 16 are arranged at the slope surface 8, the slope foot drainage grooves 17 are arranged at the slope foot 10, and the drainage holes 11 are evenly distributed on the bottom side of the prefabricated assembled drainage board 31.

[0074] S30, soil nail 5 or anchor rod 26 installation:

[0075] After the soil nail 5 or anchor rod 26 passes through the reserved hole 32, it is inserted into the soil nail hole 25 or anchor rod hole 27;

[0076] S40, GRF green protective surface layer 14 construction:

[0077] The GRF green protective surface layer 14 is laid on top of the prefabricated assembled drainage board 31 of the ecological environmental protection slope drainage system 2, and passes through the soil nails 5 or anchor rods 26, and a zigzag overlap is adopted at the overlap of the GRF green protective surface layer 14.

[0078] GRF stands for "Green Rubber Formula." GRF green protective surface is a rubber material produced using GRF technology. It exhibits excellent waterproofing, abrasion resistance, acid and alkali resistance, and high-temperature resistance, and is widely used in construction, industry, and transportation. Because GRF technology utilizes environmentally friendly raw materials and production processes, this green protective surface is also considered an environmentally friendly material.

[0079] S50, fixed GRF green protective surface layer 14:

[0080] Place stones or concrete blocks on the GRF green protective surface layer 14 above the slope top 4, the grading platform 9 and the slope foot 10 to stabilize the GRF green protective surface layer 14;

[0081] S60, installation of flexible cable net 3:

[0082] Hang the flexible cable net 3 on the slope 1 through soil nails 5 or anchor rods 26;

[0083] S70, Construction of the Standardized Soil Nail Connection Sleeve 13 or Standardized Anchor Rod Connection Sleeve 28:

[0084] Install the fixing collar 6 between the shaped soil nail connecting sleeves 13 or the shaped anchor rod connecting sleeves 28 on the top of the soil nail 5 or the anchor rod 26;

[0085] The fixing rings 6 are connected by connecting rods 7 and then fixed with compression bolts 21. At the same time, the hooks 24 are hung on the flexible cable net 3 to stabilize the flexible cable net 3, and the stones or concrete blocks placed on the GRF green protective surface layer 14 are removed.

[0086] In this embodiment, the standardized soil nail connecting sleeve 13 or the standardized anchor rod connecting sleeve 28 is composed of a fixed collar 6, a telescopic pull rod 22, a docking hole 23, and a hook 24. The telescopic pull rod 22 and the docking hole 23 are evenly arranged along the side of the fixed collar 6, and the hook 24 is hung on the flexible cable net 3.

[0087] The telescopic rod 22 is designed in a radial shape. A hook 24 is provided at the end of the telescopic rod 22 , and the connecting rod 7 is inserted into the docking hole 23 .

[0088] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0089] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0090] Although this document uses a lot of professional terms, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0091] This application is not limited to the above-mentioned optimal implementation method. Anyone can derive various other forms of products based on the inspiration of this application. However, no matter what changes are made in their shape or structure, any technical solution that is the same or similar to that of this application falls within the scope of protection of this application.

Claims

1. The construction method of the foundation pit slope assembled protective structure is characterized by: The following steps are involved: S00, Slope excavation and slope pressing: Excavating the slope body (1) to reveal the shapes of the slope top (4), slope surface (8), graded platform (9) and slope foot (10); Use wire ropes to connect the lifting rings (20) and hoist the prefabricated side panels to the top of the slope (4), the grading platform (9) and the foot of the slope (10) respectively, and then carry out the side slope pressing construction respectively; S10, soil nail hole (25) or anchor hole (27) construction: According to the positions on the design drawings, soil nail holes (25) or anchor holes (27) are dug on the slope body (1) at the top (4), slope surface (8), graded platform (9) and slope foot (10); S20, Ecological Protection Slope Drainage System (2) Construction: The prefabricated ecological environmental protection slope drainage system (2) is transported to the top of the slope body (1), and the soil nail holes (25) or anchor holes (27) are aligned with the reserved holes (32) of the ecological environmental protection slope drainage system (2); the ecological environmental protection slope drainage system (2) includes a slope drainage system (12) and a prefabricated assembled drainage board (31), and the slope drainage system (12) is arranged on the top of the prefabricated assembled drainage board (31); the slope drainage system (12) is composed of drainage holes (11), a top drainage groove (15), a slope guide groove (16), and a slope foot drainage groove (17), the top drainage groove (15) is arranged at the slope top (4), the slope guide groove (16) is arranged at the slope surface (8), the slope foot drainage groove (17) is arranged at the slope foot (10), and the drainage holes (11) are evenly distributed on the bottom side of the prefabricated assembled drainage board (31); S30, soil nail (5) or anchor rod (26) installation: After the soil nail (5) or anchor rod (26) passes through the reserved hole (32), it is inserted into the soil nail hole (25) or anchor rod hole (27); S40, GRF green protective surface layer (14) construction: The GRF green protective surface layer (14) is laid on the prefabricated assembled drainage board (31) of the ecological environmental protection slope drainage system (2) and passed through the soil nails (5) or anchor rods (26); S50, fixed GRF green protective surface layer (14): Placing stones or concrete blocks on the GRF green protective surface layer (14) above the slope top (4), the graded platform (9) and the slope foot (10) to stabilize the GRF green protective surface layer (14); S60, installation of flexible cable net (3): The flexible cable net (3) is suspended on the slope body (1) through soil nails (5) or anchor rods (26); S70, Construction of the Standardized Soil Nail Connection Sleeve (13) or Standardized Anchor Rod Connection Sleeve (28): Installing the fixing collar (6) between the shaped soil nail connection sleeves (13) or the shaped anchor rod connection sleeves (28) on the top of the soil nails (5) or the anchor rods (26); The fixing rings (6) are connected by connecting rods (7) and then fixed with compression bolts (21). At the same time, the hooks (24) are hung on the flexible cable net (3) to achieve the stability of the flexible cable net (3) and remove the stones or concrete blocks placed on the GRF green protective surface layer (14).

2. The construction method of the foundation pit slope assembled protective structure according to claim 1, characterized in that: In step S00, the prefabricated edge plate is a prefabricated concrete edge plate (18) or a steel plate edge plate (29) or a profiled steel edge plate (30), and the prefabricated concrete edge plate (18) or the steel plate edge plate (29) or the profiled steel edge plate (30) is provided with a column (19), and a hanging ring (20) is provided at the top of the column (19).

3. The construction method of the foundation pit slope assembled protective structure according to claim 1, characterized in that: In step S10, the soil nails (5) or the anchor rods (26) are evenly distributed in the slope body (1) at the slope top (4), the slope surface (8), the grading platform (9) and the slope foot (10).

4. The construction method of the foundation pit slope assembled protective structure according to claim 1, characterized in that: In step S70, the shaped soil nail connection sleeve (13) or the shaped anchor rod connection sleeve (28) is composed of a fixed collar (6), a telescopic pull rod (22), a docking hole (23), and a hook (24). The telescopic pull rod (22) and the docking hole (23) are evenly arranged along the side of the fixed collar (6), and the hook (24) is hung on the flexible cable net (3).

5. The construction method of the foundation pit slope assembled protective structure according to claim 4, characterized in that: The telescopic pull rod (22) adopts a radial design. A hook (24) is provided at the end of the telescopic pull rod (22), and the connecting rod (7) is inserted into the docking hole (23).

6. The construction method of the foundation pit slope assembled protective structure according to any one of claims 1 to 5, characterized in that: In step S40, after passing through the soil nails (5) or anchor rods (26), a zigzag overlap is adopted at the overlap of the GRF green protective surface layer (14).

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