Soil nailing wall supporting structure suitable for wind power plant slope protection

Abstract

The utility model provides a soil nailing wall supporting structure suitable for wind power plant side slope protection, which comprises a reinforcing mesh arranged on a side slope, a drainage ditch is arranged on the bottom side of the reinforcing mesh, an intercepting ditch is arranged on the top side of the reinforcing mesh, the reinforcing mesh is connected with the outer ends of reinforcing soil nails in the side slope, and a concrete surface layer is further attached to the surface of the reinforcing mesh. A base plate is arranged on the concrete surface layer, an anchorage device assembly is installed on the base plate, and a high-strength steel bar anchor rod sequentially penetrates through the anchorage device assembly, the base plate, the concrete surface layer and the steel bar net to enter the side slope. The supporting form structure provides supporting force through the hooping effect of the soil nailing wall and stress transmission to resist movement and deformation of an in-situ soil body, so that the soil body is stabilized, the safety of an engineering structure is protected, the slope stability is effectively kept, landslide and water and soil loss are prevented, and the supporting form structure has the advantages of being stable, reliable, easy to construct and low in engineering cost.

Description

Technical Field

[0001] The utility model relates to the technical field of a wind farm slope support structure, and in particular to a soil nail wall support structure suitable for wind farm slope protection. The structure is mainly used in soil and water conservation plans for transportation projects in complex mountain wind farms, and is suitable for mountain wind farm projects with clay, silty clay, silt, sand, gravel soil, fully weathered and strongly weathered rocks. Background Art

[0002] Most of my country's territory is mountainous and hilly, with large undulations, complex geological structure, and easily broken rocks. Due to the influence of wind resources, most of my country's wind farms are built in mountainous and hilly areas. In order to meet the large-scale transportation of wind farm roads and the lifting needs of lifting platforms, it is usually necessary to excavate the mountains to widen roads and platforms, which makes the high slope problem prominent. Improper slope protection can easily cause soil erosion and safety problems. At present, the commonly used slope protection forms of wind farms are mortar-laid stone slope protection, grass-planted slope protection, and hanging net protection. Among them, mortar-laid stone slope protection engineering is expensive and is a permanent engineering protection measure, which is not very applicable to wind farms; grass-planted slope protection is difficult to maintain and manage in the early stage, and it is not suitable for drought, cold and severe salinization areas; the design of the hanging net protection system is often conservative, and the performance of the components cannot be fully utilized, which easily leads to material waste.

[0003] The patent application document with publication number CN117626992A discloses a soil nail wall slope support structure. By arranging a centering component on the soil nail and fixing it with the soil nail, it can not only achieve the centering function, but also improve the pull-out bearing capacity of the soil nail. However, since the centering bracket is relatively complex in structure, the installation and fixing process of the spring is not easy to operate, and the hinged ear is easily damaged during transportation and installation, which increases the difficulty of manufacturing and maintenance and affects the overall stability and service life of the bracket. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a soil nail wall support structure suitable for wind farm slope protection, by inserting steel soil nails 1 and high-strength steel anchor rods 7 on the slope, the steel soil nails 1 and the high-strength steel anchor rods 7 are arranged in staggered layers, cement slurry or cement mortar is injected, and a steel mesh 3 is laid out on the surface layer of the original soil body, a concrete surface layer 2 is sprayed on the steel mesh 3, a pad 8 is arranged on the concrete surface layer 2, and an anchor assembly 9 is used to prestress the high-strength steel anchor rods 7, thereby forming a support form structure; the support form structure provides support force through the hoop effect and stress transfer of the soil nail wall, resists the movement and deformation of the original soil body, thereby stabilizing the soil body and protecting the safety of the engineering structure, effectively maintaining the stability of the slope, preventing landslides and soil erosion, and has the characteristics of stability and reliability, simple construction, and low engineering cost.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A soil nail wall support structure suitable for slope protection in a wind farm comprises a steel mesh 3 arranged on the slope, a drainage ditch 4 is arranged on the bottom side of the steel mesh 3, and a drainage ditch 5 is arranged on the top side thereof, the steel mesh 3 is connected to the outer ends of steel soil nails 1 in the slope, a concrete surface layer 2 is also attached to the surface of the steel mesh 3, a pad 8 is arranged on the concrete surface layer 2, an anchor assembly 9 is installed on the pad 8, and a high-strength steel anchor rod 7 passes through the anchor assembly 9, the pad 8, the concrete surface layer 2, and the steel mesh 3 in sequence to enter the slope.

[0007] The reinforced soil nails 1 and the high-strength reinforced anchor rods 7 are provided with a plurality of sets of centering positioning brackets 6 along the entire length.

[0008] The centering positioning bracket 6 is composed of three short steel bars bent at one end to 45 degrees and evenly distributed and connected along the circumference of the steel soil nail 1 or the high-strength steel anchor rod 7, and the angle between adjacent short steel bars is 120 degrees.

[0009] The centering and positioning brackets 6 are arranged at intervals of 1.5 m to 2.5 m.

[0010] The high-strength steel anchor rods 7 are arranged in staggered layers with the steel soil nails 1 from bottom to top.

[0011] The diameter of the reinforced soil nails 1 is 16 mm to 32 mm, the horizontal and vertical spacings between adjacent reinforced soil nails 1 are both 1 m to 2 m, and the inclination angle between the reinforced soil nails 1 and the horizontal plane of the slope is 5° to 20°.

[0012] The thickness of the concrete surface layer 2 is 80 mm to 100 mm, and the design strength grade is not less than C20.

[0013] The diameter of the steel bars of the steel mesh 3 is 6 mm to 10 mm, the distance between two adjacent steel bars is 150 mm to 250 mm, and the overlap length between the steel meshes is greater than 300 mm.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model inserts reinforced soil nails 1 and high-strength steel anchor rods 7 into the slope, and the reinforced soil nails 1 and the high-strength steel anchor rods 7 are arranged in staggered layers, and cement slurry or cement mortar is injected, and a steel mesh 3 is arranged on the surface layer of the original soil body, a concrete surface layer 2 is sprayed on the steel mesh 3, and a pad 8 is arranged on the concrete surface layer 2. The high-strength steel anchor rods 7 are prestressed by using an anchor assembly 9, so as to form a support structure. The support structure provides support force through the hoop effect and stress transfer of the soil nail wall, resists the movement and deformation of the original soil body, thereby stabilizing the soil body and protecting the safety of the engineering structure, effectively maintaining the stability of the slope, and preventing landslides and soil erosion.

[0016] 2. The centering positioning bracket 6 in the utility model is composed of three short steel bars bent at one end to 45 degrees and evenly distributed and connected along the circumference of the steel soil nail 1 or the high-strength steel anchor rod 7, and the angle between adjacent short steel bars is 120 degrees. Compared with the traditional centering bracket, the design has significantly reduced welding surface, simple form and easy construction and welding, which effectively reduces the cost of the support structure.

[0017] 3. The utility model realizes layered reinforcement and consolidation of the soil by staggered arrangement of high-strength steel anchor rods 7 and steel soil nails 1 from bottom to top, thereby improving the bearing capacity of the foundation and the stability of the soil, thereby enhancing the safety and durability of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the planar structure of the centering and positioning bracket 6 of the utility model.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the centering and positioning bracket 6 of the utility model.

[0021] Figure 4 It is the overall structural plan view of the utility model.

[0022] Figure 5 It is a structural schematic diagram of the connection relationship between the reinforced soil nail 1 and the reinforced mesh 3 of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] See also Figure 1A soil nail wall support structure suitable for slope protection in a wind farm comprises a steel mesh 3 arranged on the slope, a drainage ditch 4 is arranged on the bottom side of the steel mesh 3, and a drainage ditch 5 is arranged on the top side thereof. The steel mesh 3 is connected to the outer ends of the steel soil nails 1 in the slope, a concrete surface layer 2 is attached to the surface of the steel mesh 3, a pad 8 is arranged on the concrete surface layer 2, an anchor assembly 9 is installed on the pad 8, and a high-strength steel anchor rod 7 passes through the anchor assembly 9, the pad 8, the concrete surface layer 2, and the steel mesh 3 in sequence to enter the slope.

[0025] This embodiment builds this type of support structure on the slope, making full use of the hoop effect and stress transfer of the soil nail wall to provide support force, resist the movement and deformation of the in-situ soil, thereby stabilizing the soil and protecting the safety of the engineering structure, effectively maintaining the stability of the slope, and preventing landslides and soil erosion.

[0026] like Figure 1 , Figure 2 As shown, the reinforced soil nail 1 and the high-strength steel anchor rod 7 are provided with multiple sets of centering and positioning brackets 6 along the entire length, ensuring that the reinforced soil nail 1 and the high-strength steel anchor rod 7 remain stable and reliable during installation and use.

[0027] like Figure 3 As shown, the centering bracket 6 is composed of three short steel bars bent at one end at 45 degrees and evenly distributed and connected along the circumference of the steel soil nail 1 or the high-strength steel anchor rod 7, and the angle between adjacent short steel bars is 120 degrees. Compared with the traditional centering bracket, the welding surface is reduced, the form is simple and easy to construct and weld.

[0028] The centering and positioning brackets 6 are arranged at intervals of 1.5 m to 2.5 m.

[0029] like Figure 1 , Figure 4 As shown, the high-strength steel anchor rods 7 are arranged in staggered layers with the steel soil nails 1 from bottom to top, thereby achieving layered reinforcement and consolidation of the soil, improving the bearing capacity of the foundation and the stability of the soil, thereby enhancing the safety and durability of the project.

[0030] The diameter of the reinforced soil nails 1 is 16 mm to 32 mm, the horizontal and vertical spacings between adjacent reinforced soil nails 1 are both 1 m to 2 m, and the inclination angle between the reinforced soil nails 1 and the horizontal plane of the slope is 5° to 20°.

[0031] The thickness of the concrete surface layer 2 is 80 mm to 100 mm, and the design strength grade is not less than C20.

[0032] The steel bar diameter of the steel mesh 3 is 6mm-10mm, the spacing between two adjacent steel bars is 150mm-250mm, and the overlap length between the steel meshes is greater than 300mm. The steel mesh 3 can also further enhance the strength and hardness of the slope soil structure by tying full-length reinforcement steel bars, improve its compressive strength and earthquake resistance, and ensure the safety and stability of slope protection.

[0033] like Figure 5 As shown, the reinforced soil nail 1 is connected to the steel mesh 3 by welding, and the three short steel bars constituting the centering positioning bracket 6 are also welded to the reinforced soil nail 1 and the high-strength steel anchor rod 7 by welding.

[0034] The working principle of the utility model is:

[0035] By evenly arranging reinforced soil nails 1 of a certain length inside the slope according to the design, applying prestress, and combining with the shotcrete surface layer, a stable composite structure is formed, which works together with the original soil to make up for the lack of soil strength itself. Under the interaction, the deformation and failure mode of the original soil are changed, the soil stiffness is improved as a whole, and the slope stability is enhanced.

[0036] During construction, use small machinery or shovels to cut and clear the slope to ensure that the slope and slope flatness meet the design requirements. Immediately spray a thin layer of concrete or mortar on the trimmed slope surface. If the soil geological conditions are good, this step can be omitted.

[0037] The positions of the reinforced soil nails 1 and the high-strength steel anchor rods 7 are determined by measurement and layout, holes are drilled and the reinforced soil nails 1 and the high-strength steel anchor rods 7 are placed, cement paste or cement mortar is filled after installation, and then the steel mesh 3 is welded to the reinforced soil nails 1. After welding is completed, the concrete surface layer 2 is sprayed.

[0038] Finally, a pad 8 is arranged on the concrete surface layer 2, and an anchor assembly 9 is used to prestress the high-strength steel anchor rod 7.

Claims

1. A soil nail wall support structure suitable for wind farm slope protection, characterized in that: The invention comprises a steel mesh (3) arranged on a slope, a drainage ditch (4) being arranged on the bottom side of the steel mesh (3), a water interception ditch (5) being arranged on the top side thereof, the steel mesh (3) being connected to the outer ends of steel soil nails (1) in the slope, a concrete surface layer (2) being attached to the surface of the steel mesh (3), a pad (8) being arranged on the concrete surface layer (2), an anchor assembly (9) being installed on the pad (8), and a high-strength steel anchor rod (7) passing through the anchor assembly (9), the pad (8), the concrete surface layer (2), and the steel mesh (3) in sequence to enter the slope.

2. A soil nail wall support structure suitable for wind farm slope protection according to claim 1, characterized in that: The reinforced soil nail (1) and the high-strength reinforced anchor rod (7) are provided with multiple groups of centering positioning brackets (6) along the entire length.

3. The soil nail wall support structure suitable for wind farm slope protection according to claim 2 is characterized in that: The centering positioning bracket (6) is composed of three short steel bars bent at one end to 45 degrees and evenly distributed and connected along the circumference of the steel soil nail (1) or the high-strength steel anchor rod (7), and the angle between adjacent short steel bars is 120 degrees.

4. A soil nail wall support structure suitable for wind farm slope protection according to claim 2 or 3, characterized in that: The centering positioning brackets (6) are arranged at a spacing of 1.5 m to 2.5 m.

5. The soil nail wall support structure suitable for wind farm slope protection according to claim 1 is characterized in that: The high-strength steel anchor rods (7) are arranged in staggered layers with the steel soil nails (1) from bottom to top.

6. The soil nail wall support structure suitable for wind farm slope protection according to claim 1 is characterized in that: The diameter of the reinforced soil nail (1) is 16 mm to 32 mm, the horizontal spacing and vertical spacing between adjacent reinforced soil nails (1) are both 1 m to 2 m, and the inclination angle between the reinforced soil nail (1) and the horizontal plane of the slope is 5° to 20°.

7. The soil nail wall support structure suitable for wind farm slope protection according to claim 1 is characterized in that: The thickness of the concrete surface layer (2) is 80 mm to 100 mm, and the design strength grade is not less than C20.

8. The soil nail wall support structure suitable for wind farm slope protection according to claim 1 is characterized in that: The diameter of the steel bars of the steel mesh (3) is 6 mm to 10 mm, the distance between two adjacent steel bars is 150 mm to 250 mm, and the overlap length between the steel meshes is greater than 300 mm.

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