Prefabricated segmented anchor cable for filling and anchoring retaining wall

Abstract

The utility model discloses a prefabricated segmented anchor cable for filling and anchoring a retaining wall, which belongs to the technical field of geotechnical engineering retaining wall construction and comprises a free section and an anchoring section, the anchoring section is of a prefabricated concrete structure and is arranged in a step shape, a pre-tensioned steel strand is arranged in the prefabricated concrete structure of the anchoring section, and the pre-tensioned steel strand is connected with the free section. Longitudinal steel bars parallel to the pre-tensioned steel strands are further arranged on the peripheries of the pre-tensioned steel strands, and reinforcing structures are further arranged on the peripheries of the pre-tensioned steel strands and the peripheries of the longitudinal steel bars. One end of the free section is detachably connected with the precast concrete structure of the anchoring section through an anchor backing plate, the other end of the free section is provided with a retaining wall, and the unbonded steel strand on the free section is detachably arranged on the anchor backing plate through a connector. A plurality of prefabricated concrete structures can be manufactured at a time in a factory, and during use, only concrete needs to be installed, and on-site grouting is not needed, so that a large amount of manpower and material resources are saved, the construction difficulty of the anchor cable is simplified, and the construction time of the anchor cable 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 segmented anchor cable used for filling anchor retaining walls. Background Art

[0002] The limited fill retaining wall is close to the existing slope behind it, so utilizing the existing stable slope and employing an anchor-type lightweight retaining wall is the best option. However, anchor cable construction overlaps with wall and fill construction. One current construction method involves constructing the wall and fill to a certain height, then installing a row of anchor cables, and repeating this cycle until the top of the wall. While this method is technically sound, all other processes are suspended during the intermediate anchor cable construction and while waiting for tensioning, resulting in a long overall construction period. Furthermore, in large-scale fill anchor-type retaining walls, the anchor cables are entirely located within the fill. Drilling can only be performed when the fill is above a certain elevation above the anchor cables. Furthermore, anchor cable drilling overlaps with wall construction, and fill can only resume after the anchor cable grouting reaches its age and tensioning, resulting in a long overall construction period. Utility Model Content

[0003] In view of the existing large-scale fill anchor retaining wall, drilling can only be carried out when the fill is higher than a certain elevation of the anchor cable, and the fill can only be continued after the anchor cable grouting reaches the age tensioning, which results in a long total construction period. The purpose of this utility model is to propose a prefabricated segmented anchor cable for fill anchor retaining wall.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a prefabricated segmented anchor cable for fill anchor retaining wall, comprising a free section and an anchoring section, the anchoring section is a prefabricated concrete structure, and is arranged in a stepped manner, the prefabricated concrete structure of the anchoring section is provided with a pre-tensioned steel strand inside, the periphery of the pre-tensioned steel strand is also provided with a longitudinal steel bar arranged in parallel with the pre-tensioned steel strand, and the periphery of the pre-tensioned steel strand and the longitudinal steel bar is also provided with a reinforcement structure; one end of the free section is detachably connected to the prefabricated concrete structure of the anchoring section through an anchor plate, and the other end is provided with a retaining wall, and a grouting pipe and an unbonded steel strand are also provided on the free section, and the unbonded steel strand is detachably arranged on the anchor plate through a connector.

[0005] As an improvement of the above technical solution, the anchoring section is arranged in multiple sections, each section is in a truncated cone shape and is integrated with the previous section in a stepped shape.

[0006] As an improvement to the above technical solution, the pre-tensioned steel strands of the anchoring section are arranged through, and the reinforcement structure includes a first reinforcement structure arranged at each end of the precast concrete structure and a second reinforcement structure arranged on the longitudinal steel bars.

[0007] As an improvement of the above technical solution, the first reinforcement structure includes a first reinforcement stirrup, a second reinforcement stirrup and a reinforcement tangent to the first reinforcement stirrup, which are arranged on the periphery of the pre-tensioned steel strands and the longitudinal steel bars.

[0008] As an improvement of the above technical solution, the second reinforcement structure includes second reinforcement stirrups arranged around the pre-tensioned steel strands and the longitudinal steel bars.

[0009] As an improvement of the above technical solution, the anchor plate and the connector are provided with a central mounting hole, and the longitudinal steel bars are fixed to the anchor plate and the connector through the central mounting hole.

[0010] As an improvement of the above technical solution, the connector is further provided with an end mounting hole, and the unbonded steel strand is arranged on the end mounting hole through an extrusion anchor.

[0011] As an improvement of the above technical solution, a protective cover is also connected to the anchor plate, which is connected to the steel plate at the end through a corrugated pipe. The grouting pipe and the unbonded steel strand are arranged inside the protective cover and the corrugated pipe, and the retaining wall is arranged at the position of the corrugated pipe.

[0012] As an improvement of the above technical solution, a dividing plate is further provided on the periphery of the unbonded steel strands and the grouting pipe, and the dividing plate is used to evenly arrange multiple unbonded steel strands on the periphery of the grouting pipe.

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

[0014] Prefabricated concrete structures can be produced in multiple quantities at one time in the factory. When in use, only the concrete needs to be installed, and no on-site grouting is required, which saves a lot of manpower and material resources, simplifies the construction difficulty of the anchor cable, and saves the construction time of the anchor cable.

[0015] 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

[0016] Figure 1 The utility model is a schematic diagram of a prefabricated segmented anchor cable structure for a fill anchor retaining wall.

[0017] Figure 2 It is a structural schematic diagram of the anchoring section of the anchor cable of the utility model.

[0018] Figure 3 It is a schematic diagram of the free section structure of the anchor cable of the utility model.

[0019] Figure 4 This utility model Figure 1 Sectional view of the precast concrete structure at point AA.

[0020] Figure 5 This utility model Figure 1 Sectional view of the precast concrete structure at point BB.

[0021] Figure 6 This is a structural schematic diagram of the anchor plate and connector of the utility model.

[0022] in:

[0023] 1. Anchoring section; 11. Precast concrete structure; 12. Pre-tensioned steel strand; 13. Longitudinal reinforcement; 14. First reinforcing stirrup; 15. Second reinforcing stirrup; 16. Reinforcement bar; 2. Free section; 21. Grouting pipe; 22. Unbonded steel strand; 23. Protective cover; 24. Corrugated pipe; 25. Distribution board; 3. Connector; 31. End mounting hole; 4. Anchor pad; 5. Middle mounting hole; 6. Retaining wall; 7. Steel pad; 8. Extrusion anchor. 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 1 A prefabricated segmented anchor cable for earth-fill anchor retaining walls comprises a free section 2 and an anchoring section 1. The anchoring section 1 is a prefabricated concrete structure 11 and is arranged in a stepped manner. During production, the pre-tensioned steel strands 12, steel bars, etc. are first fixed in shape and position in a mold in the factory, and then concrete grouting is performed. After the grouting is air-dried, the mold is removed. After demoulding, a prefabricated concrete structure is formed. The prefabricated concrete structure 11 can be directly applied to the anchor hole of the anchoring section 1. This prefabricated concrete structure can be produced in multiples at one time in the factory, and when in use, only the concrete needs to be installed, and no on-site grouting is required, which saves a lot of manpower and material resources, simplifies the construction difficulty of the anchor cable, and saves the construction time of the anchor cable.

[0027] Specifically, the precast concrete structure 11 of the anchoring section 1 has pre-tensioned steel strands 12 arranged around the center of the concrete. The strands are also surrounded by longitudinal reinforcements 13 arranged in parallel with the strands. A reinforcement structure is also provided around the strands and longitudinal reinforcements 13. The longitudinal reinforcements 13 and reinforcement structure are arranged within the precast concrete, providing support for the interior of the precast concrete and preventing the non-ductile concrete structure from being affected by external factors and fracturing. The longitudinal reinforcements 13 and reinforcement structure reinforce the precast concrete internally in both the axial and radial directions, further increasing the supporting force of the strands around the strands, and thus strengthening the internal structural support of the precast concrete, making the precast concrete structure stronger and more stable.

[0028] Reference Figure 2 、 Figure 4 、 Figure 5 As an embodiment of the present invention, the pre-tensioned steel strands 12 and longitudinal steel bars 13 of the anchoring section 1 are arranged throughout, and the reinforcement structure includes a first reinforcement structure arranged at the end of each section of the precast concrete structure 11 and a second reinforcement structure arranged on the longitudinal steel bars 13. Only one group of the first reinforcement structure is arranged at the end of each section of the precast concrete structure 11, while multiple groups of the second reinforcement structure are arranged on each section of the precast concrete structure 11. The first reinforcement structure includes a first reinforcement stirrup 14, a second reinforcement stirrup 15, and a reinforcement bar 16 tangential to the first reinforcement stirrup 14, which are arranged on the periphery of the pre-tensioned steel strands 12 and the longitudinal steel bars 13. The second reinforcement structure includes a second reinforcement stirrup 15 arranged on the periphery of the pre-tensioned steel strands 12 and the longitudinal steel bars 13. The second reinforcement stirrup 15 on the first reinforcement structure is the same as the second reinforcement stirrup 15 on the second reinforcement structure, and the first reinforcement stirrup 14 on the first reinforcement structure is arranged on the periphery of the second reinforcement stirrup 15. The provision of the first and second reinforcing structures not only enhances the supporting force of the pre-tensioned steel strands 12 and the longitudinal reinforcements within the precast concrete structure 11 , but also provides radial support to the pre-tensioned steel strands 12 and the longitudinal reinforcements 13 around them.

[0029] The anchoring section 1 is arranged in multiple sections, each section is in a truncated cone shape and is integrated with the previous section in a stepped shape. As an embodiment of the present application, the precast concrete structure 11 is divided into two sections, the steel strands and longitudinal steel bars 13 in the two sections of the precast concrete structure 11 are integrated, and the section between the two sections of the precast concrete structure 11 is also formed in one piece. Each section of the precast concrete structure 11 is arranged in a truncated cone shape, and the end face of the thicker end of the concrete structure in the front section is connected to the end face of the thinner end of the concrete structure in the other section, so that the two sections of the concrete structure are arranged in a stepped shape. This stepped concrete structure is not only convenient for operation during installation, but also after the anchoring section 1 is installed and fixed, the steps form a reverse resistance of the anchoring section 1 at the installation position, ensuring the stability of the precast concrete structure 11 in the anchoring section 1.

[0030] Reference Figure 3 After the anchoring section 1 is installed, the free section 2 needs to be connected to the prefabricated anchoring section 1 fixed in the slope. Preferably, one end of the free section 2 is detachably connected to the prefabricated anchoring section 1 through an anchor plate 4 and a connector 3, and a retaining wall 6 is provided at the other end. A grouting pipe 21 is also provided at the center of the free section 2. The anchor plate 4 and the connector 3 are fixed by bolts. The anchor plate 4 is used to connect to the prefabricated concrete structure 11 of the anchoring section 1, while the connector 3 is used to connect the steel strand of the free section 2. The steel strand of the free section 2 adopts an unbonded steel strand 22. The free section 2 and the anchor cable of the free section 2 are connected to the integrated anchoring section 1 through the anchor plate 4, which not only realizes the detachable setting of the two ends, but also integrates the connection structure, making the connection between the two sections more stable.

[0031] Also refer to Figure 6 , support ribs extend from the anchor plate 4 in the direction of the precast concrete structure 11 of the anchoring section 1. The support ribs penetrate deep into the concrete of the anchoring section 1, and the anchor plate 4 can be cast into the precast concrete structure 11 simultaneously when the precast concrete structure 11 is being cast. This integrally cast structure further strengthens the connection of the anchor plate 4 and ensures the stability of the overall connection of the anchor cable structure. For the connection between the unbonded steel strand 22 of the free section 2 and the anchor plate 4, a detachable connection method is adopted, specifically: end mounting holes 31 for passing the unbonded steel strand 22 are provided at both ends of the connector 3. The end mounting holes 31 are through holes. After the pre-tensioned steel strand 12 is passed through the through holes, an extrusion anchor 8 is used to detachably fix it at the end of the unbonded steel strand 22. A middle mounting hole 5 is also provided at the center of the anchor plate 4 and the connector 3. The longitudinal reinforcement 13 is fixed to the anchor plate 4 and the connector 3 through the middle mounting hole 5.

[0032] For the free section 2 of the anchor cable, a protective cover 23 and a bellows 24 are provided on the periphery of the grouting pipe 21 and the unbonded steel strand 22. One end of the protective cover 23 is connected to the anchor pad 4, and the other end is connected to the steel pad 7 at the end through the bellows 24. The grouting pipe 21 and the unbonded steel strand 22 are arranged inside the protective cover 23 and the bellows 24, and the retaining wall 6 is arranged at the position of the bellows 24. In addition, a dividing plate 25 is provided on the periphery of the unbonded steel strand 22 and the grouting pipe 21. The dividing plate 25 is used to evenly arrange multiple unbonded steel strands 22 on the periphery of the grouting pipe 21. Multiple dividing plates 25 are evenly provided on the periphery of the unbonded steel strand 22 and the grouting pipe 21. Multiple dividing plates 25 not only separate the multiple unbonded steel strands 22, but also fix the unbonded steel strands 22 and the grouting pipe 21, which facilitates subsequent grouting operations.

[0033] When the prefabricated segmented anchor cables for the earth-fill anchor retaining wall 6 are used for slope reinforcement, the specific process is as follows:

[0034] S1: Precast concrete structure 11 of anchoring section 1 is manufactured in a factory;

[0035] S2: Dig a soil-filled trench on the original slope surface and spread a mortar or fine stone concrete leveling layer at the bottom of the trench corresponding to the anchoring section 1;

[0036] S3: placing the precast concrete structure 11 in the trench and making the precast anchoring section 1 fit tightly with the leveling layer through vibration;

[0037] S4: Connect the free section 2 to the anchoring section 1 through the anchor plate 4;

[0038] S5: Fill the trench with mortar or fine stone concrete to fix the anchor cable body and backfill the trench;

[0039] S6: Complete grouting of free segment 2;

[0040] S7: Continue filling the soil to a certain height above the anchor cable elevation, and tension and lock the anchor cable;

[0041] S8: Repeat the above steps at other locations on the slope until the top of the wall.

[0042] 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 segmented anchor cable for earth-fill anchoring retaining walls, characterized by: It includes a free section and an anchoring section, the anchoring section is a precast concrete structure and is arranged in a stepped manner, the precast concrete structure of the anchoring section is provided with a pre-tensioned steel strand inside, the periphery of the pre-tensioned steel strand is also provided with a longitudinal steel bar arranged in parallel with the pre-tensioned steel strand, and the periphery of the pre-tensioned steel strand and the longitudinal steel bar is also provided with a reinforcement structure; one end of the free section is detachably connected to the precast concrete structure of the anchoring section through an anchor plate, and the other end is provided with a retaining wall, and a grouting pipe and an unbonded steel strand are also provided on the free section, and the unbonded steel strand is detachably arranged on the anchor plate through a connector.

2. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The anchoring section is arranged in multiple sections, each section is in a truncated cone shape and is integrated with the previous section in a stepped shape.

3. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 2, characterized in that: The pre-tensioned steel strands of the anchoring section are arranged through, and the reinforcement structure includes a first reinforcement structure arranged at the end of each section of the precast concrete structure and a second reinforcement structure arranged on the longitudinal steel bars.

4. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 3, characterized in that: The first reinforcement structure includes a first reinforcement stirrup, a second reinforcement stirrup, and reinforcement bars tangent to the first reinforcement stirrup, which are arranged around the pre-tensioned steel strands and the longitudinal steel bars.

5. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 4, characterized in that: The second reinforcement structure includes second reinforcement stirrups arranged around the pre-tensioned steel strands and the longitudinal steel bars.

6. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The anchor plate and the connector are provided with a middle mounting hole, and the longitudinal steel bar is fixed to the anchor plate and the connector through the middle mounting hole.

7. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 6, characterized in that: The connector is also provided with an end mounting hole, and the unbonded steel strand is arranged on the end mounting hole through an extrusion anchor.

8. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 6, characterized in that: The anchor plate is also connected to a protective cover, which is connected to the steel plate at the end through a corrugated pipe. The grouting pipe and the unbonded steel strand are arranged inside the protective cover and the corrugated pipe, and the retaining wall is arranged at the position of the corrugated pipe.

9. The prefabricated segmented anchor cable for earth-fill anchor retaining wall according to claim 1, characterized in that: The outer periphery of the unbonded steel strands and the grouting pipe is further provided with a dividing plate, and the dividing plate is used to evenly arrange multiple unbonded steel strands on the outer periphery of the grouting pipe.

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