Prefabricated assembly type anchor cable for filling and anchoring retaining wall

Abstract

The utility model discloses a prefabricated assembly type anchor cable for filling and anchoring a retaining wall, which comprises a free section and an anchoring section, the anchoring section comprises a plurality of truncated cone type prefabricated concrete structures, and the plurality of truncated cone type prefabricated concrete structures are detachably connected through an assembly type structure. Mounting holes are further formed in the center of the anchoring section and the center of the free section, and the steel strand and the grouting pipe are integrally arranged in the mounting holes of the free section and the anchoring section. The precast concrete structure which is arranged in a segmented mode is small in size, and during use, a plurality of circular truncated cones can be assembled into a complete anchoring section anchor cable through an assembly type structure. According to the assembly type prefabricated anchoring section structure, work on a construction site is transferred to a workshop, the construction process is simplified, the construction time is saved, meanwhile, the size of one-time production is reduced, production and manufacturing in a factory are facilitated, and the production cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering retaining wall construction, and particularly relates to a prefabricated assembled anchor cable used for filling and anchoring retaining walls. Background Art

[0002] The limited fill retaining wall is close to the existing slope behind it, so the best option is to use an anchor-type lightweight retaining wall that utilizes the existing stable slope. However, anchor cable construction overlaps with wall and fill construction. One current construction method is to construct a wall and fill to a certain height, then construct a row of anchor cables, and repeat this cycle until the top of the wall. This is technically sound, but other processes are also suspended during the intermediate anchor cable construction and waiting for tensioning, resulting in a long total construction period. In addition, for large-scale fill anchor retaining walls, the anchor cables are all located within the fill. When using fillers such as sand, gravel, and crushed stone, the anchor cables may cause the drill to collapse and become stuck. Casing must be used to follow up the drilling, which causes significant drilling disturbance. If the overburden thickness of the drilled hole is insufficient, the fill can loosen and bulge, resulting in high overall construction costs and many hidden dangers. Summary of the Invention

[0003] In view of the existing large-scale earth-fill anchor retaining walls, all the anchor cables are located in the earth-fill. When filling, the anchor cables may cause the drill to collapse and the earth-fill to become loose and bulge. The overall construction cost is high and there are many hidden dangers. The purpose of this utility model is to propose a prefabricated assembled anchor cable for earth-fill anchor retaining walls.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a prefabricated assembled anchor cable for fill anchor retaining wall, including a free section and an anchoring section, the anchoring section includes several conical precast concrete structures, and the several conical precast concrete structures are detachably connected by an assembled structure, the anchoring section and the free section are also provided with mounting holes in the center, the steel strands and the grouting pipes are integrally arranged in the mounting holes of the free section and the anchoring section, the free section and the anchoring section are connected by a steel pipe, and the free section and the anchoring section are respectively provided with a bottom plate and an anchor plate for sealing at two opposite ends, and the anchor plate is arranged outside the retaining wall.

[0005] As an improvement of the above technical solution, the assembled structure is arranged at the narrow end of the first frustum-shaped precast concrete structure and the wide part of the second frustum-shaped precast concrete structure.

[0006] As an improvement of the above technical solution, the prefabricated structure includes two docking surfaces, and the two docking surfaces are respectively provided with mutually matching raised portions and recessed portions, and the docking surfaces, raised portions and recessed portions are respectively provided on the two connected precast concrete structures.

[0007] As an improvement to the above technical solution, a blocking structure is further provided in the recessed portion at the connection between the precast concrete structure and the free section, and the blocking structure is grouting concrete.

[0008] As an improvement of the above technical solution, the ends of the grouting pipe and the steel strand are further provided with guide caps, the guide caps are conical and hollow, and the grouting pipe and the steel strand are arranged in the guide caps.

[0009] As an improvement of the above technical solution, the precast concrete structure is further provided with reinforcing bars, which are arranged in the concrete and include a plurality of longitudinal steel bars arranged in parallel and spiral stirrups arranged on the longitudinal steel bars.

[0010] As an improvement of the above technical solution, a plurality of centering brackets are further provided in the mounting hole, and the centering brackets are used to support the steel strands and the grouting pipes.

[0011] As an improvement of the above technical solution, the free section is further provided with a bellows, and the bellows is arranged at the grouting pipe and the outer periphery of the steel strand between the steel pipe and the anchor plate.

[0012] As an improvement of the above technical solution, the precast concrete structure is further provided with a one-way slurry outlet hole, which passes through the outer wall of the precast concrete structure to the central mounting hole.

[0013] The aforementioned prefabricated segmented anchor cable for earth-fill anchor retaining walls can achieve the following beneficial effects:

[0014] (1) The precast concrete structure is small in size and can be assembled into a complete anchor cable segment through the prefabricated structure. This prefabricated anchor segment structure transfers the work on the construction site to the workshop, which simplifies the construction process and saves construction time. It also reduces the volume of one-time production, facilitates factory production, and saves production costs.

[0015] (2) The grouting and sealing structure is only performed on the pin range of the installation hole. Compared with the method of directly grouting in the anchor section and the free section, the grouting amount is reduced, that is, the grouting time and the air-drying time are reduced, which ensures the tensioning strength and saves construction time.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of a prefabricated assembled anchor cable structure for a fill anchor retaining wall.

[0018] Figure 2It is a schematic diagram of the precast concrete structure in the anchoring section of the utility model.

[0019] Figure 3 It is a schematic diagram of the free section structure of the anchor cable of the utility model.

[0020] Figure 4 It is an enlarged schematic diagram of the end of the precast concrete structure of the present invention.

[0021] Figure 5 This utility model Figure 2 The cross-section diagram is shown in the middle AA.

[0022] in:

[0023] 1. Anchoring section; 11. Precast concrete structure; 12. Mounting hole; 13. Bottom plate; 14. Raised portion; 15. Recessed portion; 16. Longitudinal reinforcement; 17. Spiral stirrups; 18. Sealing structure; 2. Free section; 21. Bellows; 22. Steel pipe; 23. Anchor plate; 24. Retaining wall; 3. Steel strand; 4. Grouting pipe; 5. Guide cap; 6. Centering bracket; 7. One-way slurry outlet hole. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present invention are described in detail below. In the detailed description that follows, numerous specific details are set forth to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is intended solely to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention; and the dimensions of some structures may be exaggerated for clarity. The features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments. Furthermore, the terms "first or I," "second or II," "third or III," etc., are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0025] The directional words that appear in the following description refer to the directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be directly connected or indirectly connected. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] Reference Figure 1A prefabricated assembled anchor cable for earth-fill anchoring retaining walls 24 includes a free section 2 and an anchoring section 1. The anchoring section 1 includes a plurality of truncated cone-shaped prefabricated concrete structures 11, and the plurality of truncated cone-shaped prefabricated concrete structures 11 are detachably connected by an assembled structure. The prefabricated concrete structures can be prefabricated in a workshop before the anchor cable is set. The prefabricated concrete structures 11 that can be set in sections are relatively small in size. When in use, multiple cones can be assembled into a complete anchoring section 1 anchor cable through the assembled structure. This assembled prefabricated anchoring section 1 structure transfers the work on the construction site to the workshop, simplifies the construction process, saves construction time, and also reduces the volume of the prefabricated structure produced at one time, making it easier to produce in the factory and saving production costs.

[0027] Reference Figure 2 、 Figure 5 As an embodiment of the present application, one end of the truncated cone precast concrete structure 11 is a thicker cylinder and the other end is a thinner cylinder. When the precast concrete segments are assembled and connected using an assembled structure, the assembled structure is arranged at the thinner end of the previous truncated cone precast concrete structure 11 and the thicker end of the next truncated cone precast concrete structure 11. After assembly, the thicker end of each precast concrete structure 11 is closer to the free segment 2. This reversely arranged concrete structure is not only convenient for operation during installation, but also generates reverse resistance after the anchor segment 1 is installed and fixed, thereby ensuring the stability of multiple precast concrete structures 11 in the anchor segment 1. The precast concrete structure 11 is also provided with reinforcing ribs, which are arranged in the concrete. Before prefabricating the concrete structure, the longitudinal steel bars 16 are first placed in a suitable position, and then a plurality of spiral stirrups 17 are used to radially reinforce the longitudinal steel bars 16. Finally, concrete is injected to complete the prefabrication.

[0028] The prefabricated structure includes two butt joints provided on the precast concrete structures 11 at both ends, and the two butt joints are provided with a mating protrusion 14 and a recessed portion 15, respectively. The butt joints, protrusion 14, and recessed portion 15 are provided on the two connected precast concrete structures 11, and are integrally manufactured together with the two precast concrete structures 11 in the factory. During construction, one section of the precast concrete structure 11 can be installed into the hole of the anchor cable segment, and then the next section can be installed. During installation, the protrusion 14 is directly inserted into the recessed portion 15 of the previous section of the concrete structure to complete the butt joint of the precast concrete structures 11 at both ends. After all the precast concrete structures are installed, the soil can be filled.

[0029] The center of the anchoring section 1 and the free section 2 is also provided with a mounting hole 12. The steel strand 3 and the grouting pipe 4 are integrally arranged in the mounting hole 12 of the free section 2 and the anchoring section 1. The mounting hole 12 of the anchoring section 1 is set at the center of the precast concrete structure 11. The mounting hole 12 is reserved when the concrete structure is precast. The integrated steel strand 3 from the free section 2 to the anchoring section 1 connects the free section 2 and the multi-section precast concrete structure 11 of the anchoring section 1 in an integrated manner at the center, thereby enhancing the overall stability of the anchor cable structure and facilitating the tensioning of the anchor cable. After the steel strand 3 and the grouting pipe 4 of the anchor cable section and the free section 2 are installed, the mounting hole 12 can be grout-sealed. A sealing structure 18 is also provided in the recessed portion 15 at the connection between the precast concrete structure 11 and the free section 2. The sealing structure 18 is grouting concrete. This method of grouting and sealing the mounting hole 12 in a small area 18 reduces the amount of grouting compared to grouting directly in the anchor section 1 and free section 2. This reduces the grouting time and drying time, thereby ensuring the tensioning strength and saving construction time. The precast concrete structure 11 is also provided with a one-way grouting hole 7. The one-way grouting hole 7 extends through the outer wall of the precast concrete structure 11 to the central mounting hole 12. The provision of the one-way grouting hole 7 assists in exhausting gas from the mounting hole 12 during grouting.

[0030] Also refer to Figure 4 , a plurality of centering brackets 6 are further provided in the mounting hole 12. The centering brackets 6 are used to support the steel strand 3 and the grouting pipe 4. Multiple groups of centering brackets 6 are provided. The multiple groups of centering brackets 6 provide uniform and stable support for the steel strand 3 and the grouting pipe 4 in the mounting hole 12. The ends of the grouting pipe 4 and the steel strand 3 are further provided with guide caps 5. The guide caps 5 are conical and hollow, and the grouting pipe 4 and the steel strand 3 are arranged in the guide caps 5. The ends of the guide caps 5, which are sleeved on the ends of the steel strand 3 and the grouting pipe 4, are sharpened to facilitate the insertion of the grouting pipe 4 and the steel strand 3 into the mounting hole 12.

[0031] Reference Figure 3 Since the prefabricated anchoring section 1 is difficult to change in the later stage, the free section 2 is connected to the anchoring section 1 through the installation hole 12 that needs to be grouting during construction. The free section 2 and the anchoring section 1 are connected by a steel pipe 22. Half of the steel pipe 22 is set in the anchoring section 1, and the other end is set in the free section 2 and is located at the edge of the installation hole 12 and fixed by grouting. The two ends of the free section 2 and the anchoring section 1 that are separated from each other are respectively provided with a bottom plate 13 and an anchor plate 23 for sealing, which facilitates grouting after sealing. The anchor plate 23 is set on the outside of the retaining wall 24. The free section 2 is also provided with a bellows 21, which is set on the periphery of the grouting pipe 4 and the steel strand 3 between the steel pipe 22 and the anchor plate 23. The prefabricated concrete pipe and the bellows 21 are fixed with mortar or fine stone concrete.

[0032] When the prefabricated assembled anchor cable for the earth-fill anchor retaining wall 24 is used for slope reinforcement, the specific process is as follows:

[0033] S1: Precast concrete structure 11 of anchoring section 1 is manufactured in a factory;

[0034] S2: dig a soil-fill trench on the original slope surface;

[0035] S3: placing the precast concrete structure 11 in sections in the trench and connecting the anchoring section 1 with the free section 2;

[0036] S4: Fill the groove with mortar or fine stone concrete to fix the anchor section 1 and the free section 2;

[0037] S5: Install the steel strand 3 and the grouting pipe 4 into the installation hole 12 of the precast concrete;

[0038] S6: Continue filling the soil until it reaches a certain height above the anchor cable elevation, then complete the anchor cable grouting and tensioning and locking the anchor cable;

[0039] S7: Repeat the above steps at other locations on the slope until the top of the wall.

[0040] The above is only a preferred embodiment of the present invention. Any simple modification, equivalent change and modification made to the above embodiment by any technician familiar with the profession based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A prefabricated assembled anchor cable for earth-fill anchoring retaining walls, characterized by: It includes a free section and an anchoring section, the anchoring section includes several frustum-shaped precast concrete structures, and the several frustum-shaped precast concrete structures are detachably connected through an assembled structure. The centers of the anchoring section and the free section are also provided with mounting holes, and the steel strands and grouting pipes are integrally arranged in the mounting holes of the free section and the anchoring section. The free section and the anchoring section are connected by a steel pipe, and the two ends of the free section and the anchoring section that are away from each other are respectively provided with a bottom plate and an anchor plate for sealing, and the anchor plate is arranged outside the retaining wall.

2. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The assembled structure is arranged at the narrow end of the first frustum-shaped precast concrete structure and the wide part of the second frustum-shaped precast concrete structure.

3. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 2, characterized in that: The assembled structure includes two butt joint surfaces, and the two butt joint surfaces are respectively provided with convex parts and concave parts that match each other. The butt joint surfaces, convex parts and concave parts are respectively provided on the two connected precast concrete structures.

4. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 3, characterized in that: A blocking structure is further provided in the recessed portion at the connection between the precast concrete structure and the free section, and the blocking structure is grouting concrete.

5. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The ends of the grouting pipe and the steel strand are further provided with guide caps, which are conical and hollow, and the grouting pipe and the steel strand are arranged in the guide caps.

6. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The precast concrete structure is further provided with reinforcing bars, which are arranged in the concrete and include a plurality of longitudinal steel bars arranged in parallel and spiral stirrups arranged on the longitudinal steel bars.

7. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: A plurality of centering brackets are also provided in the installation hole, and the centering brackets are used to support the steel strands and the grouting pipes.

8. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The free section is further provided with a bellows, which is arranged on the grouting pipe and the outer periphery of the steel strand between the steel pipe and the anchor plate.

9. The prefabricated assembled anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The precast concrete structure is also provided with a one-way slurry outlet hole, which penetrates the outer wall of the precast concrete structure to the central mounting hole.

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