Recyclable prestressed anchor cable

Abstract

The application discloses a recyclable prestressed anchor cable, which comprises an anchor cable assembly, a support and a connecting assembly, the anchor cable assembly comprises a steel strand and a recycling cable, the steel strand comprises a free section and an anchoring section which are arranged separately, the support is provided with a grouting hole and a mounting hole, the connecting assembly comprises a connecting part and a first clamping part in a conical shape, the connecting part is embedded in the mounting hole, the connecting part is formed with an inner cavity, the inner cavity comprises a first end and a second end which are arranged oppositely, the free section is mounted at the first end, the second end is arranged in a tapering manner along a first direction, the first clamping part is sleeved on the anchoring section and embedded in the second end, and one end of the recycling cable extends into the inner cavity and is connected with the first clamping part along the first direction. The recyclable prestressed anchor cable can be used for supporting the side slope, the inner wall of a foundation pit, a mine and the like, the supporting and recycling principle is simple, the recyclable prestressed anchor cable is easy to manufacture, the structure is simple, the recyclable prestressed anchor cable is convenient to operate, easy to recycle, can be recycled for many times, and the use value of the anchor cable is improved.

Description

Technical Field

[0001] This invention relates to the field of anchor cable technology, and more particularly to a recyclable prestressed anchor cable. Background Technology

[0002] Currently, most temporary engineering supports typically use recyclable anchor cables to save construction costs and reduce pollution in underground spaces. The emergence of prestressed anchor cables has provided a new solution for geotechnical engineering protection, and their application is very widespread and common, primarily used for slope protection, deep foundation pit support, and also extensively in coal mines. Initially, prestressed anchor cables designed and manufactured were mostly non-recyclable, with all anchor cables permanently left in the soil. When a project requires a large number of anchor cables, non-recyclable anchor cables increase the project cost and are somewhat wasteful. Furthermore, the large amount of steel left in the soil over time can cause pollution.

[0003] While existing recyclable prestressed anchor products have significantly improved the aforementioned problems of environmental pollution and high cost, and have been designed and manufactured in various ways according to different uses and functions, thus providing more options for engineering projects, existing recyclable anchors still have some shortcomings: (1) Some existing mechanical recyclable anchors are designed and manufactured in an overly sophisticated manner, with complex component designs that are inconvenient to install, and unclear force transmission paths. They are prone to deformation and jamming during use, which can lead to their inability to be recycled; (2) Another major category is the hot-melt recyclable anchor, which requires accurate installation of the hot melt agent and conductor. The hot melt agent is prone to spillage and leakage during use, and the conductor is prone to breakage due to friction and compression from rocks and soil, making the anchor unrecyclable.

[0004] Therefore, it is necessary to provide a new recyclable prestressed anchor cable to address or at least mitigate the aforementioned technical deficiencies. Summary of the Invention

[0005] The main objective of this invention is to provide a recyclable prestressed anchor cable, which aims to solve the technical problems of complex structure and difficult recycling of existing recyclable anchor cables.

[0006] To achieve the above objectives, the present invention provides a recyclable prestressed anchor cable, the recyclable prestressed anchor cable comprising:

[0007] An anchor cable assembly includes a steel strand and a recovery cable, the steel strand including a free section and an anchoring section separated from each other, and a first direction is defined as the direction along the extension direction of the free section and toward the anchoring section;

[0008] The bracket has grouting holes and mounting holes;

[0009] A connecting assembly includes a connecting portion and a tapered first clamping member. The connecting portion is embedded in the mounting hole and has an inner cavity. The inner cavity includes a first end and a second end disposed opposite to each other. A free section is mounted on the first end, and the second end is tapered along the first direction. The first clamping member is sleeved on the anchoring section and embedded in the second end. One end of the retrieval cable extends into the inner cavity along the first direction and connects to the first clamping member.

[0010] In one embodiment, the bracket includes a mounting portion and a grout stop plate, the grout stop plate being connected to the side of the mounting portion away from the free section, the mounting hole penetrating both the grout stop plate and the mounting portion, and the grouting hole being formed on the grout stop plate.

[0011] In one embodiment, there are three sets of anchor cable assemblies and three sets of mounting holes. The three sets of mounting holes are distributed in a triangular shape on the bracket, and each anchor cable assembly is connected to each mounting hole in a one-to-one correspondence.

[0012] In one embodiment, the recyclable prestressed anchor cable further includes a reinforcing component, which includes an expansion ring and a clamping ring spaced apart. The inner diameter of the clamping ring is smaller than the inner diameter of the expansion ring. The expansion ring and the clamping ring are concentrically arranged, and the central axes of the expansion ring and the clamping ring are parallel to the first direction. They are respectively connected to the anchoring sections of the three sets of anchor cable assemblies, so that the three sets of anchoring sections have a concave-convex spindle-shaped structure.

[0013] In one embodiment, the reinforcing component further includes a guide cap, in which the ends of the three sets of anchoring sections furthest from the bracket are all gathered within the guide cap.

[0014] In one embodiment, the first clamping member includes two clamping plates arranged opposite each other, and each of the two clamping plates has a receiving groove on its opposite sides for covering the anchoring section. The outer contour of the clamping plates is tapered along the first direction. The number of the retrieval cables is two, and the two retrieval cables are respectively connected to the two clamping plates.

[0015] Alternatively, the first clamping member includes three clamping plates, which are arranged circumferentially around the outer periphery of the anchoring section. The outer contour of the clamping plates is gradually tapered along the first direction. The number of retrieval cables is three, and the three retrieval cables are respectively connected to the three clamping plates.

[0016] In one embodiment, each of the clamping pieces and the anchoring section has a plurality of limiting ribs spaced apart along a first direction on the contact surface.

[0017] In one embodiment, the connecting assembly further includes a second clamping member, which is gradually widened along the first direction, and the first end is gradually widened along the first direction. The second clamping member is sleeved on the outer periphery of the free segment and embedded in the first end.

[0018] In one embodiment, the diameter of the mounting hole gradually increases along the first direction, the outer diameter of the connecting part gradually increases along the first direction, and the outer wall surface of the connecting part matches the inner wall surface of the mounting hole.

[0019] In one embodiment, the recyclable prestressed anchor cable further includes a sealing element, which includes a stranded sealing ring and a grouting sealing ring. The stranded sealing ring is sleeved on the anchoring section and fits against the outside of the connection portion, and the grouting sealing ring is circumferentially disposed around the grouting hole.

[0020] In the above technical solution of the present invention, the first clamping member is used to assemble and fix the anchoring section and the connecting part to prevent the anchoring section from separating from the connecting part during grouting and tensioning. During assembly, the first clamping member is first used to wrap the anchoring section, and then it is installed together into the second end of the connecting part to form a shape. Then, it is installed together into the mounting hole of the bracket. The free section is fixedly connected to the first end. The bracket separates the opening to be grouted. The tapered first clamping member gradually decreases in outer diameter along the first direction and fits into the inner wall of the second end. The anchoring section extends into the hole, and the free section extends out of the hole and connects to the tensioning jack. Grouting is first injected into the hole by passing the grouting pipe through the grouting hole. The grout adheres to and wets the anchoring section and the soil of the hole wall on the lower side of the connecting part, thereby giving the anchor cable a strong anchoring force. After the grout has solidified to a certain extent, the steel strands are tensioned. The prestress is transferred from the free section to the anchoring section through the connecting part. The second end, which is gradually tapered along the first direction, squeezes the first clamping member, which in turn squeezes the anchoring section, thus making the clamping member more stable and the connection with the second end tighter. When recycling is needed after use, the steel strands of the anchor cable are loosened in the free section, keeping the anchor cable in a slack state. The recycling cable is then tensioned manually or with tensioning equipment, causing the first clamping member fitted in the anchoring section to detach from the second end and the anchoring section. At this point, the free section of the steel strand is tensioned again, causing the connecting part to move, which in turn causes the support to separate from the opening, leaving only the anchoring section in the grout. This allows for the recycling of most components of the prestressed anchor cable. This invention can provide support for slopes, foundation pit walls, mine shafts, and other areas. Its support and recycling principle is simple, easy to manufacture, and has a simple structure. It is convenient to operate, easy to recycle, and can be reused multiple times, thus improving the value of the anchor cable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a recyclable prestressed anchor cable according to an embodiment of the present invention.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of a recyclable prestressed anchor cable according to another embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the connecting component and the anchor cable component in operation according to an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the connecting component and anchor cable component during retraction according to an embodiment of the present invention;

[0026] Figure 5 This is a partially enlarged view of a recyclable prestressed anchor cable according to an embodiment of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of a bracket from one perspective according to an embodiment of the present invention;

[0028] Figure 7 This is a three-dimensional structural schematic diagram of the bracket from another perspective of an embodiment of the present invention.

[0029] Explanation of icon numbers:

[0030] label name label name 100 Recyclable prestressed anchor cable 11 steel strand 110 Grouting pipe 111 Free section 1 Anchor cable assembly 112 Anchorage section 2 support 12 Recycling 3 Connection components 21 Grouting holes 4 Enhanced components 22 Mounting holes 5 Seals 23 Installation Department 311 inner cavity 24 Grout stop board 312 First end 31 Connection part 313 Second end 32 First clamping component 321 Clip 33 Second clamping component 41 Expansion ring 51 Stranded wire sealing ring 42 Tightening ring 52 Grouting sealing ring 43 Guide cap

[0031] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of this invention are only used to interpret a specific posture (as shown in the attached diagram). Figure 1The relative positions and movements of the components shown below are considered. If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" can explicitly or implicitly include at least one of that feature.

[0035] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0036] Please refer to Figures 1 to 7 The present invention provides a recyclable prestressed anchor cable 100, the recyclable prestressed anchor cable 100 comprising:

[0037] Anchor cable assembly 1 includes steel strand 11 and recovery cable 12. The steel strand 11 includes a free section 111 and an anchoring section 112 that are separated from each other. The direction along the extension direction of the free section 111 and toward the anchoring section 112 is defined as a first direction.

[0038] The bracket 2 has a grouting hole 21 and an installation hole 22.

[0039] The connecting component 3 includes a connecting part 31 and a tapered first clamping member 32. The connecting part 31 is embedded in the mounting hole 22 and has an inner cavity 311. The inner cavity 311 includes a first end 312 and a second end 313 arranged opposite to each other. The free section 111 is installed on the first end 312 and the second end 313 is tapered along a first direction. The first clamping member 32 is sleeved on the anchoring section 112 and embedded in the second end 313. One end of the retrieval cable 12 extends into the inner cavity 311 along the first direction and connects with the first clamping member 32.

[0040] In the above embodiments, the first direction is Figure 1From top to bottom, the first clamping member 32 is used to assemble and fix the anchoring section 112 and the connecting part 31, preventing the anchoring section 112 from separating from the connecting part 31 during grouting and tensioning. During assembly, the first clamping member 32 is first used to wrap the anchoring section 112, and then they are inserted together into the second end 313 of the connecting part 31 to form a shape. Then they are installed together into the mounting hole 22 of the bracket 2. The free section 111 is fixedly connected to the first end 312. The bracket 2 separates the opening to be grouted. The conical first clamping member 32 gradually decreases in outer diameter along the first direction and fits into the inner wall of the second end 313. The anchoring section 112 extends into the hole, and the free section 111... 1. The tensioning jack is connected to the external opening of the tunnel. First, grouting pipe 110 is inserted into the tunnel through grouting hole 21 to inject grout. The grout adheres to and wets the anchoring section 112 and the tunnel wall soil on the lower side of the connection part 31, thereby giving the anchor cable a strong anchoring force. After the grout solidifies to a certain extent, the steel strand 11 is tensioned. The prestress is transferred from the free section 111 to the anchoring section 112 through the connection part 31. The second end 313, which is gradually tapered along the first direction, squeezes the first clamping member 32. The first clamping member 32 squeezes the anchoring section 112, thereby making the clamping of the anchoring section 112 by the first clamping member 32 more stable and the connection with the second end 313 tighter. Figure 3 and Figure 4 As shown, when the anchor cable is recycled after use, the steel strand 11 of the anchor cable is loosened in the free section 111, so that the anchor cable is kept in a slack state. The recycling cable 12 is tensioned manually or by tensioning equipment, so that the first clamp 32 sleeved on the anchor section 112 is separated from the second end 313 and the anchor section 112. At this time, the free section 111 of the steel strand 11 is tensioned again. The free section 111 drives the connecting part 31, and the connecting part 31 drives the bracket 2 to separate from the opening, leaving only the anchor section 112 in the grout. In this way, most of the components of the prestressed anchor cable can be recycled. The advantages of this embodiment are: (1) The overall structure of the anchor cable is simple and ingenious, and it is not easy to cause large deformation during the service stage. It is not easy to cause problems such as knotting and jamming of the steel strand 11, which makes it impossible to recycle. The working principle is easy to understand, and the operator can quickly understand its structural principle and assemble it simply; (2) The force transmission path of the anchor cable is clear. Most of the components such as the free section 111 of the steel strand 11, the connecting component 3, the recycling cable 12, and the support 2 can be recycled. The recycling rate is high and pollution is reduced; (3) After recycling, the connecting component 3 is disassembled and reassembled after simple processing. The grouting pipe 110 is replaced and then reused, which increases the number of times the anchor cable can be reused and is more economical. This invention can realize the support of slopes, pit walls, mines and other parts. Its support and recycling principle is simple, easy to manufacture, not complicated in structure, convenient to operate, easy to recycle, and can be reused multiple times, which improves the use value of the anchor cable. It should be noted that the recycling cable 12 can be a flexible steel wire rope.

[0041] In one embodiment, reference is made to Figure 6 and Figure 7 The bracket 2 includes a mounting part 23 and a grout stop plate 24. The grout stop plate 24 is connected to the side of the mounting part 23 away from the free section 111. The mounting hole 22 passes through both the grout stop plate 24 and the mounting part 23. The grouting hole 21 is formed on the grout stop plate 24. The grout stop plate 24 is used to seal the opening and prevent the grout from leaking out.

[0042] In one embodiment, reference is made to Figures 1-3 There are three sets of anchor cable assemblies 1 and three sets of mounting holes 22. The three sets of mounting holes 22 are distributed in a triangular shape on the bracket 2, and each anchor cable assembly 1 is connected to each mounting hole 22 in a one-to-one correspondence. The three sets of anchor cable assemblies 1 work together, and when tensioning with a jack, all three sets of anchor cable assemblies 1 work simultaneously, increasing the stress on the anchor cable and the structural strength, while also improving the anchoring performance.

[0043] In one embodiment, reference is made to Figure 1 and Figure 2 The recyclable prestressed anchor cable 100 also includes a reinforcing component 4, which includes an expansion ring 41 and a clamping ring 42 spaced apart. The inner diameter of the clamping ring 42 is smaller than that of the expansion ring 41. The expansion ring 41 and the clamping ring 42 are concentrically arranged, and their central axes are parallel to the first direction. They are respectively connected to the anchoring sections 112 of the three sets of anchor cable components 1, so that the three sets of anchoring sections 112 have a concave-convex spindle-shaped structure. The distance between the expansion ring 41 and the clamping ring 42 can be adapted to the actual situation. The expansion ring 41 and the clamping ring 42 are made by processing and welding steel bars on the construction site on a bending machine, without the need to purchase corresponding products. After processing, they are firmly tied to the steel strands 11 with multiple binding wires. The anchoring sections 112 of the three steel strands 11 are supported or limited by the clamping ring 42 and the expansion ring 41 into a concave-convex shape, forming a spatial spindle-shaped structure, which effectively improves the anchoring force of the steel strands 11. Specifically, the reinforcing component 4 also includes a guide cap 43. The ends of the three anchoring sections 112 furthest from the support 2 are all gathered inside the guide cap 43 to avoid clutter. This prevents the steel strands 11 from getting tangled and stuck with internal components during insertion into the tunnel and tensioning. It should be noted that the number of expansion rings 41 and tightening rings 42 is not limited to a single one; each can be more than one, arranged alternately, and finally gathered inside the guide cap 43.

[0044] In one embodiment, reference is made to Figure 3 and Figure 4The first clamping member 32 includes two clamping plates 321 arranged opposite each other. Each clamping plate 321 has a receiving groove on both opposite sides for covering the anchoring section 112. The outer contour of the clamping plate 321 tapers along a first direction. Two retrieval cables 12 are provided, each connected to one of the two clamping plates 321. The first clamping member 32 consists of two separable clamping plates 321, facilitating installation and disengagement from the anchoring section 112 and the connecting part 31 by pulling with the retrieval cables 12.

[0045] In one embodiment, the first clamping member 32 may be composed of, but not limited to, the above-described form, in the same principle. The first clamping member 32 may also include three clamping pieces 321, which are arranged in a circular pattern around the outer periphery of the anchoring section 112. The outer contour of the clamping pieces 321 is gradually tapered along the first direction. There are three retrieval cables 12, which are respectively connected to the three clamping pieces 321.

[0046] In one embodiment, each clamping piece 321 has multiple limiting ribs spaced apart along a first direction on its contact surface with the anchoring section 112. The limiting ribs are used to increase the friction between the anchoring section 112 and the clamping piece 321, preventing them from sliding apart during use.

[0047] In one embodiment, reference is made to Figure 3 and Figure 4 The connecting component 3 also includes a second clamping member 33, which is gradually widened along the first direction. The first end 312 is also gradually widened along the first direction. The second clamping member 33 is sleeved on the outer periphery of the free segment 111 and embedded in the first end 312. The second clamping member 33 is used to ensure that the free segment 111 can be securely installed on the first end 312. The specific structure and working principle of the second clamping member 33 are the same as those of the first clamping member 32, and will not be described in detail here.

[0048] In one embodiment, the diameter of the mounting hole 22 gradually increases along the first direction, and the outer diameter of the connecting portion 31 gradually increases along the first direction. The outer wall surface of the connecting portion 31 matches the inner wall surface of the mounting hole 22. When the free segment 111 is stretched outward, the connecting portion 31 is embedded in the mounting hole 22. When the free segment 111 is stretched by the jack, the connection between the connecting portion 31 and the mounting hole 22 is tighter, and the structure is more stable.

[0049] In one embodiment, reference is made to Figure 2The recyclable prestressed anchor cable 100 also includes a sealing element 5, which includes a stranded sealing ring 51 and a grouting sealing ring 52. The stranded sealing ring 51 is sleeved on the anchoring section 112 and fits against the outside of the connecting part 31 to seal the connection between the anchoring section 112 and the connecting part 31 to prevent grout from entering the inner cavity 311 during subsequent grouting. The grouting sealing ring 52 is ringed around the grouting hole 21. When the grouting pipe 110 is inserted, the grouting sealing ring 52 is sealed to the grouting pipe 110 to prevent grout leakage during grouting.

[0050] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A recyclable prestressed anchor cable, characterized in that, include: An anchor cable assembly includes a steel strand and a recovery cable, the steel strand including a free section and an anchoring section separated from each other, and a first direction is defined as the direction along the extension direction of the free section and toward the anchoring section; The bracket has grouting holes and mounting holes; A connecting assembly includes a connecting portion and a tapered first clamping member. The connecting portion is embedded in the mounting hole and has an inner cavity. The inner cavity includes a first end and a second end disposed opposite to each other. A free section is mounted on the first end, and the second end is tapered along the first direction. The first clamping member is sleeved on the anchoring section and embedded in the second end. One end of the retrieval cable extends into the inner cavity along the first direction and connects to the first clamping member.

2. The recyclable prestressed anchor cable as described in claim 1, characterized in that, The bracket includes a mounting part and a grout stop plate. The grout stop plate is connected to the side of the mounting part away from the free section. The mounting hole passes through both the grout stop plate and the mounting part. The grouting hole is formed on the grout stop plate.

3. The recyclable prestressed anchor cable as described in claim 2, characterized in that, The number of anchor cable assemblies is three sets, and the number of mounting holes is three sets. The three sets of mounting holes are distributed in a triangular shape on the bracket, and each anchor cable assembly is connected to each mounting hole in a one-to-one correspondence.

4. The recyclable prestressed anchor cable as described in claim 3, characterized in that, The recyclable prestressed anchor cable also includes a reinforcing component, which includes an expansion ring and a clamping ring spaced apart. The inner diameter of the clamping ring is smaller than the inner diameter of the expansion ring. The expansion ring and the clamping ring are concentrically arranged, and the central axes of the expansion ring and the clamping ring are parallel to the first direction. They are respectively connected to the anchoring sections of the three sets of anchor cable assemblies, so that the three sets of anchoring sections have a concave-convex spindle-shaped structure.

5. The recyclable prestressed anchor cable as described in claim 4, characterized in that, The reinforcing component also includes a guide cap, and the ends of the three sets of anchoring sections away from the bracket are all gathered inside the guide cap.

6. The recyclable prestressed anchor cable as described in claim 1, characterized in that, The first clamping member includes two clamping plates arranged opposite each other. Each of the two clamping plates has a receiving groove on its opposite sides for covering the anchoring section. The outer contour of the clamping plate is gradually tapered along the first direction. There are two retrieval cables, which are respectively connected to the two clamping plates. Alternatively, the first clamping member includes three clamping plates, which are arranged circumferentially around the outer periphery of the anchoring section. The outer contour of the clamping plates is gradually tapered along the first direction. The number of retrieval cables is three, and the three retrieval cables are respectively connected to the three clamping plates.

7. The recyclable prestressed anchor cable as described in claim 6, characterized in that, Each of the clamping pieces has multiple limiting ribs spaced apart along a first direction on its contact surface with the anchoring section.

8. The recyclable prestressed anchor cable as described in any one of claims 1 to 7, characterized in that, The connecting assembly further includes a second clamping member, which is gradually widened along the first direction. The first end is also gradually widened along the first direction. The second clamping member is sleeved on the outer periphery of the free segment and embedded in the first end.

9. The recyclable prestressed anchor cable as described in any one of claims 1 to 7, characterized in that, The diameter of the mounting hole gradually increases along the first direction, the outer diameter of the connecting part gradually increases along the first direction, and the outer wall surface of the connecting part matches the inner wall surface of the mounting hole.

10. The recyclable prestressed anchor cable according to any one of claims 1 to 7, characterized in that, The recyclable prestressed anchor cable also includes a sealing element, which includes a strand sealing ring and a grouting sealing ring. The strand sealing ring is sleeved on the anchoring section and fits against the outside of the connection portion, and the grouting sealing ring is arranged around the grouting hole.

Images