Soil nailing wall
By setting up centering brackets at intervals on the soil nails, and combining grouting solids, spray-mixed layers and steel mesh, the problem of soil nails being easily corroded is solved, and the support effect of soil nail walls is improved.
Patent Information
- Application Number
- CN202421559990.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the construction process of existing soil nail walls, soil nails are prone to contact with the hole wall, resulting in too small or exposed protective layer, susceptible to moisture and salt corrosion, affecting the support effect.
Multiple sets of centering brackets are arranged at intervals on the soil nails, and the grouting solid body is used to wrap the soil nails, and the spray-mixed layer is connected to the steel bar mesh to form a stable support structure.
Through the design of the centering bracket, the soil nails can be kept in the middle of the hole, ensuring that the slurry is completely wrapped, avoiding premature corrosion, and improving the support effect.
Smart Images
Figure CN222862291U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of supporting engineering, and more specifically relates to a soil nail wall. Background Art
[0002] Soil nail wall is an in-situ soil reinforcement technology. The foundation pit slope is reinforced with soil nails made of steel bars, a steel mesh is laid on the slope surface, and a concrete surface layer is sprayed on the slope. The structure is a composite body formed by the reinforcement rods (i.e. soil nails or anchor rods) set in the slope and the surrounding soil, and the support structure similar to the gravity retaining wall formed by the surface layer.
[0003] At present, during the construction of soil nail walls, round steel bars or threaded steel bars are basically used as soil nails. However, since the soil nail holes are inclined, when the soil nails are directly inserted into the holes, they will contact the hole walls. During grouting, it is easy to cause the protective layer of the soil nails to be too small or even the soil nails to be directly exposed. During use, the soil nails are easily corroded by moisture and salt in the soil, affecting the support effect. Utility Model Content
[0004] The utility model aims to provide a soil nail wall to solve the above technical problems existing in the prior art.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a soil nail wall, including a plurality of soil nails, a grouting consolidation body, a sprayed mix layer and a steel mesh, wherein the plurality of soil nails are used to be inserted into the soil of the slope at intervals, and a plurality of sets of centering brackets are arranged at intervals on each soil nail; the grouting consolidation body is wrapped around the outside of the soil nail to consolidate the soil nail in the soil; the sprayed mix layer is arranged on the slope and connected to the soil nail; the steel mesh is arranged in the sprayed mix layer and fixedly connected to the outer end of the soil nail.
[0006] In combination with the above technical solution, in a possible implementation, the centering bracket includes two symmetrically arranged bent rods, and both ends of the bent rods are respectively fixedly connected to the soil nails.
[0007] In combination with the above technical solution, in a possible implementation, the centering bracket also includes an outward expansion rod, which is arranged at an angle to the plane where the bent rod is located, and has one end fixedly connected to the bent rod and the other end extending backward and outward.
[0008] In combination with the above technical solution, in a possible implementation, both ends of each curved rod are provided with outward-tensioning rods, and the outward-tensioning rods on each curved rod are arranged to face back to back.
[0009] In combination with the above technical solution, in a possible implementation, a hook bent inwardly is provided at the tail of the external tension rod.
[0010] In combination with the above technical solution, in a possible implementation, the external tension rod is elastic, and the hook is tied to the soil nail by a water-soluble line.
[0011] In combination with the above technical solution, in a possible implementation, the bent rod and the tension rod are an integrated structure and are welded to the soil nails.
[0012] In combination with the above technical solution, in a possible implementation manner, a cement blanket is provided inside the spray-mixed layer, and a through hole is provided on the cement blanket for the tail end of the soil nail to pass through.
[0013] In combination with the above technical solution, in a possible implementation, two spaced-apart limit rods are provided at the tail end of the soil nail, and the two limit rods are used to limit the cement blanket and connect with the steel mesh.
[0014] In combination with the above technical solution, in a possible implementation, distribution bars are further provided between the cement blanket and the sprayed mix layer. The distribution bars are arranged in a grid form and fixedly connected to the soil nails.
[0015] The beneficial effect of the soil nail wall provided by the utility model is that: compared with the prior art, the utility model can keep the soil nails in the middle of the hole by arranging multiple groups of centering brackets at intervals on the soil nails, so that the soil nails can be completely wrapped by the slurry during grouting, avoiding premature corrosion, which is beneficial to ensuring the support effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1 A schematic diagram of the structure of a soil nail wall provided by an embodiment of the utility model;
[0018] Figure 2 A schematic diagram of the main structure of the centering bracket portion on the soil nail of the soil nail wall provided by the embodiment of the utility model;
[0019] Figure 3 A schematic side view of the centering bracket portion on the soil nail of the soil nail wall provided by an embodiment of the utility model;
[0020] Figure 4 The present invention is a schematic cross-sectional structural diagram of the tail of a soil nail of a soil nail wall provided by an embodiment of the present invention.
[0021] Among them, the reference numerals in the figures are as follows:
[0022] 10. Soil nails; 11. Centering bracket; 12. Limit rod;
[0023] 111. bent rod; 112. outward-stretched rod; 113. bent hook; 114. water-soluble line;
[0024] 20. Grouting consolidation body; 30. Spraying mix layer; 40. Steel mesh; 50. Cement blanket; 60. Distribution reinforcement. DETAILED DESCRIPTION
[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, not all of the embodiments, and the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0026] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.
[0027] In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.
[0028] The soil nail wall provided by the utility model is now described.
[0029] like Figure 1 and Figure 2 As shown, the first embodiment of the utility model provides a soil nail wall, including a plurality of soil nails 10, a grouting consolidation body 20, a sprayed mix layer 30 and a steel mesh 40, wherein the plurality of soil nails 10 are used to be inserted into the soil of the slope at intervals, and a plurality of groups of centering brackets 11 are arranged at intervals on each soil nail 10; the grouting consolidation body 20 is wrapped around the outside of the soil nail 10 to consolidate the soil nail 10 in the soil; the sprayed mix layer 30 is arranged on the slope and connected to the soil nail 10; the steel mesh 40 is arranged in the sprayed mix layer 30 and fixedly connected to the outer end of the soil nail 10.
[0030] Compared with the prior art, the soil nail wall provided in this embodiment can keep the soil nail 10 in the middle of the hole by arranging multiple groups of centering brackets 11 at intervals on the soil nail 10, so that the soil nail 10 can be completely wrapped by the slurry during grouting, avoiding premature corrosion and ensuring the support effect.
[0031] like Figures 1 to 3 As shown, in some embodiments, the centering bracket 11 includes two symmetrically arranged bent rods 111, and the two ends of the bent rods 111 are respectively fixedly connected to the soil nails 10. The bent rods 111 are bent rods, and after the two ends are connected to the soil nails 10, a triangular structure is formed. After the soil nails 10 are inserted into the hole, the bent rods 111 can be supported on the hole wall, so that the soil nails 10 are suspended. Moreover, this form occupies a relatively small space, which can facilitate the production, storage and transportation of the soil nails 10.
[0032] Furthermore, if Figure 2 and Figure 3 As shown, in some embodiments, the centering bracket 11 also includes an outward tension rod 112, which is arranged at an angle to the plane where the bent rod 111 is located, preferably vertically arranged, and one end is fixedly connected to the bent rod 111, and the other end extends backward and outward in an open state. Compared with the bent rod 111, this can provide a larger range of support, so as to better support the soil nail 10 on the hole wall.
[0033] In some specific implementations, both ends of each curved rod 111 are provided with an outward-stretching rod 112 , and the outward-stretching rod 112 on each curved rod 111 is arranged to face back to back to improve the supporting performance.
[0034] Furthermore, a hook 113 bent inward is provided at the tail of the external tension rod 112 to prevent the external tension rod 112 from excessively scraping the hole wall. The external tension rod 112 is elastic, and the hook 113 is tied to the soil nail 10 through a water-soluble line 114, so that the soil nail 10 can be inserted into the hole more smoothly. After insertion, or during the grouting process, the water-soluble line 114 dissolves in water, loosens the external tension rod 112, and allows the external tension rod 112 to prop up the soil nail 10.
[0035] In some specific embodiments, the bent rod 111 and the tension rod 112 are an integrated structure and are welded to the soil nail 10 to facilitate production.
[0036] like Figure 4As shown, in some embodiments, a cement blanket 50 is provided inside the spray-mixed layer 30, and a through hole is provided on the cement blanket 50 for the tail end of the soil nail 10 to pass through, so as to improve the support performance. Two spaced limiting rods 12 are provided at the tail end of the soil nail 10, and the two limiting rods 12 are respectively used to limit the cement blanket 50 and connect with the steel mesh 40 to improve the connectivity. Distribution bars 60 are also provided between the cement blanket 50 and the spray-mixed layer 30, and the distribution bars 60 are arranged in a grid form and fixedly connected to the soil nail 10 to fix the cement blanket 50.
[0037] During construction, after the earthwork is excavated, a cement blanket 50 can be directly laid on the slope surface, and water can be sprinkled to harden the cement blanket 50, so as to quickly reinforce the slope surface. Then, according to the hole position design, holes are drilled in the cement blanket 50 and the soil, and then soil nails 10 are inserted. The limiting rods 12 at the tails of the soil nails are used to support the outside of the cement blanket 50 to improve the connectivity and limiting properties. Then, distribution bars are laid and welded to the tails of the soil nails 10 to ensure the stability of the cement blanket 50 before the shotcrete operation. Then, the spraying and mixing operation can be directly carried out to form a spraying and mixing layer 30, or the next layer of earthwork can be excavated and then the spraying and mixing operation can be carried out together to reduce the construction cost.
[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A soil nail wall, characterized in that: include: A plurality of soil nails (10) are used to be inserted into the soil of the slope at intervals, and a plurality of sets of centering brackets (11) are arranged at intervals on each soil nail (10); A grouting consolidation body (20) wrapped around the outside of the soil nail (10) to consolidate the soil nail (10) in the soil; A spray-mixed layer (30) is provided on the slope and connected to the soil nails (10); A steel mesh (40) is arranged in the sprayed mix layer (30) and is fixedly connected to the outer end of the soil nail (10).
2. The soil nail wall according to claim 1, characterized in that: The centering bracket (11) comprises two symmetrically arranged bent rods (111), and both ends of the bent rods (111) are respectively fixedly connected to the soil nails (10).
3. The soil nail wall according to claim 2, characterized in that: The centering bracket (11) further comprises an outwardly extending rod (112), which is arranged at an angle with the plane where the bent rod (111) is located, and has one end fixedly connected to the bent rod (111) and the other end extending backward and outward.
4. The soil nail wall according to claim 3, characterized in that: The outward-stretching rods (112) are provided at both ends of each of the curved rods (111), and the outward-stretching rods (112) on each of the curved rods (111) are arranged facing each other.
5. The soil nail wall according to claim 3, characterized in that: The tail of the outwardly extending rod (112) is provided with a hook (113) bent inwardly.
6. The soil nail wall according to claim 5, characterized in that: The external tension rod (112) is elastic, and the curved hook (113) is tied to the soil nail (10) via a water-soluble line (114).
7. The soil nail wall according to claim 6, characterized in that: The bent rod (111) and the outwardly extending rod (112) are an integrated structure and are welded to the soil nail (10).
8. The soil nail wall according to claim 1, characterized in that: A cement blanket (50) is provided inside the spray-mixed layer (30), and a through hole is provided on the cement blanket (50) for the tail end of the soil nail (10) to pass through.
9. The soil nail wall according to claim 8, characterized in that: The tail end of the soil nail (10) is provided with two spaced-apart limiting rods (12), and the two limiting rods (12) are respectively used to limit the cement blanket (50) and to connect with the steel mesh (40).
10. The soil nail wall according to claim 9, characterized in that: Distribution ribs (60) are also provided between the cement blanket (50) and the spray-mixed layer (30); the distribution ribs (60) are arranged in a grid form and are fixedly connected to the soil nails (10).