A recoverable anchor cable tensioning and locking device

Abstract

The utility model discloses a kind of tensioning locking devices of recoverable anchor cable, it is related to building engineering technical field, the utility model includes carrier, carrier bottom is fixed with pressure head, and the top of pressure head is respectively penetrated with support anchor cable and intermediate anchor cable, carrier top end is sleeved with bellows;And bellows outside is connected with end cap by sealing sleeve.The utility model is through the setting of carrier, pressure head, bellows, support anchor cable and intermediate anchor cable, multiple support anchor cables are circular array distribution with intermediate anchor cable as center, then support anchor cable and intermediate anchor cable are placed into pressure head, then make pressure head inward deformation and the circular ring interference fit formed by the circular array of multiple support anchor cables by the way such as hydraulic pressure pressurization, while the inner ring of circular ring and intermediate anchor cable interference fit;Only one intermediate anchor cable can be simultaneously ended the limiting of multiple support anchor cables by pulling out, without staff to remove the limiting of support anchor cable one by one, effectively reduce the time and energy consumption when recovering anchor cable.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a tensioning and locking device for recyclable anchor cables. Background Technology

[0002] In the process of supporting deep foundation pits, pile anchor support is a commonly used support method. Anchor cables are an important component of the pile anchor support structure. After the support work is completed, in order to avoid the anchor cables being buried underground and forming underground waste that occupies underground space and pollutes the underground environment, recyclable anchor cables are usually used. Recyclable anchor cables need to be fixed with tensioning and locking devices during installation.

[0003] Existing tensioning and locking devices for recyclable anchor cables typically employ a rotary unlocking method. This involves rotating the anchor cable in the opposite direction during disassembly to separate it from the support structure. This method is quite cumbersome. Each anchor cable group usually consists of multiple anchor cables, mostly four or six, and sometimes even more. When disassembling the anchor cables, workers need to use specialized pliers to clamp the exposed ends of the anchor cables, then forcefully reverse the anchor cable by rotating the pliers to stop the movement, and finally pull the anchor cable out. Each additional anchor cable requires workers to use the pliers to reverse the anchor cable to stop the movement, making the operation time-consuming and labor-intensive. Furthermore, deep and large foundation pit support often involves more than one anchor cable group, making anchor cable recovery extremely time-consuming and labor-intensive. In addition, during grouting, some grout may splash into or flow into the corrugated pipe, which, after solidification, will bond the corrugated pipe, the support structure, and the anchor cable, further increasing the difficulty of recovery. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a tensioning and locking device for recyclable anchor cables to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tensioning and locking device for recyclable anchor cables, comprising a carrier body, a pressure-bearing head fixed at the bottom of the carrier body, and a supporting anchor cable and an intermediate anchor cable passing through the top of the pressure-bearing head respectively; a corrugated pipe is sleeved on the top of the carrier body; and an end cap is connected to the outside of the corrugated pipe through a sealing sleeve, and a sealing ring passes through the top of the end cap.

[0006] By adopting the above technical solution, multiple support anchor cables are arranged in a ring array with the central anchor cable as the center. The support anchor cables and the central anchor cable are then placed into a pressure head. Subsequently, hydraulic pressure is applied to deform the pressure head inward, causing it to pressurize against the ring formed by the multiple support anchor cables. The inner ring of the ring also pressurizes against the central anchor cable. One end of the bellows is sealed with an end cap. During this process, a sealing sleeve fills the gap between the end cap and the bellows, and a sealing ring fills the gap between the end cap and the support anchor cable, preventing grout from splashing in during grouting. The slurry may flow into the bellows, increasing the difficulty of recovering the support anchor cable; and the shape of the fluororubber ring inside the sealing ring causes the slurry to exert pressure on the fluororubber ring when it wants to flow into the bellows, causing deformation and increasing the contact pressure between the fluororubber ring and the support anchor cable, further improving the sealing performance; when recovery is required, the intermediate anchor cable can be pulled out by the hydraulic device, causing it to be pulled out of the pressure head. At this time, a large gap is formed in the pressure head, causing multiple support anchor cables to spread out, and then the staff can directly pull out the support anchor cable manually.

[0007] Furthermore, the carrier, pressure head, and end cap are all made of 304 or 316L stainless steel.

[0008] By adopting the above technical solution, the load-bearing body, pressure head, and end cap are made of 304 or 316L stainless steel. Firstly, the strength is sufficient to withstand the load, avoiding damage to the load-bearing body and pressure head due to compressive and tensile stresses. Secondly, it is resistant to acid and alkali corrosion, preventing structural oxidation, rust, and corrosion.

[0009] Furthermore, multiple support anchor cables are provided, and the multiple support anchor cables are distributed in a ring array with the middle anchor cable as the center.

[0010] By adopting the above technical solution, the staff can use a hydraulic device to pull the intermediate anchor cable out of the pressure head. At this time, a large gap is formed in the pressure head, which causes multiple support anchor cables to spread out. Then the staff can directly pull out the support anchor cables manually.

[0011] Furthermore, the ring formed by the multiple ring arrays of the supporting anchor cables is interference-fitted with the bearing head.

[0012] By adopting the above technical solution, the support anchor cable and the intermediate anchor cable are placed in the pressure head. Then, the workers use hydraulic pressure to deform the pressure head inward and make it pressurize with the ring formed by the annular array of multiple support anchor cables. The inner ring of the ring is pressurized with the intermediate anchor cable, thereby completing the assembly of the support anchor cable and the intermediate anchor cable.

[0013] Furthermore, the sealing sleeve is interference-fitted with the bellows, and the sealing sleeve is fixedly connected to the end cap by adhesive with fluororubber special adhesive. The sealing sleeve is made of fluororubber material.

[0014] By adopting the above technical solution, workers roughen the inner ring of the end cover and the outer ring of the sealing sleeve, then clean the roughened surfaces and apply a special adhesive for fluororubber, then place the sealing sleeve into the inner ring of the end cover and wait for the adhesive to cure to complete the fixing work.

[0015] Further, the sealing ring is composed of a stainless steel skeleton and a fluororubber ring, the longitudinal section of the fluororubber ring of the sealing ring is in a "ji" shape, and the stainless steel skeleton of the sealing ring is fixedly connected to the end cover by means of interference fit first and then micro spot welding.

[0016] By adopting the above technical solution, the worker places the end cover on the top of a boss, the diameter of the top of the boss is close to the diameter of the inner ring of the end cover, then places the sealing ring on the top of the end cover and presses it into the end cover through a hydraulic device to complete the fixing by interference fit, and then the worker reinforces it by micro spot welding. The micro spot welding has a small heat-affected zone and a fast cooling speed, which avoids damaging the fluororubber ring, so as to assist in reinforcing the sealing ring and effectively prevent the sealing ring from falling off.

[0017] Further, the end cover has a convex cross section, and one end of the intermediate anchor cable is wrapped by the protrusion on the top of the end cover.

[0018] By adopting the above technical solution, the intermediate anchor cable is shielded by the end cover, which plays a foolproof role, so that the worker will not tension the intermediate anchor cable during the tensioning and locking process, and the intermediate anchor cable is prevented from being pulled out to affect the strength.

[0019] Further, a pressure bearing plate is arranged outside the end cover, and the top of the pressure bearing plate is connected with an anchor head, which is connected with the supporting anchor cable.

[0020] By adopting the above technical solution, one end of the supporting anchor cable is connected to the anchor head, and the other end is connected to the pressure bearing head. When the supporting anchor cable is tensioned, the pressure bearing head is stressed and transmits the pulling force to the bearing body. The bearing body transmits the pulling force to the surrounding grouting layer through mechanical force and friction force, the grouting layer around the bearing body then transmits the force to the grouting layer of the anchoring section in the form of compressive stress, and finally the grouting layer of the anchoring section transmits the force to the surrounding rock and soil mass in the form of shear stress.

[0021] Further, a plurality of reinforcing rings are arranged on the outer ring of the bearing body, and the plurality of reinforcing rings are distributed at equal intervals.

[0022] By adopting the above technical solution, the arrangement of the plurality of reinforcing rings increases the friction between the bearing body and the surrounding grouting layer, and improves the stability.

[0023] In summary, the utility model mainly has the following beneficial effects: 1. This utility model, through the arrangement of a bearing body, a pressure head, a corrugated pipe, supporting anchor cables, and intermediate anchor cables, arranges multiple supporting anchor cables in a circular array with the intermediate anchor cable as the center. The supporting anchor cables and intermediate anchor cables are then placed into the pressure head. Hydraulic pressure is applied to deform the pressure head inward, causing it to pressurize against the circular array of supporting anchor cables. The inner ring of the circular array also pressurizes against the intermediate anchor cable. When recovery is required, the intermediate anchor cable is simply pulled out of the pressure head using a hydraulic device. This creates a large gap within the pressure head, allowing the supporting anchor cables to disperse. Workers can then manually pull out the supporting anchor cables. Pulling out only one intermediate anchor cable simultaneously releases the restraints of multiple supporting anchor cables, eliminating the need for workers to release each anchor cable individually, effectively reducing the time and effort required for anchor cable recovery. 2. This utility model, through the setting of end caps, sealing sleeves, and sealing rings, seals one end of the bellows with the end cap, fills the gap between the end cap and the bellows with the sealing sleeve, and fills the gap between the end cap and the supporting anchor cable with the sealing ring, preventing grout from splashing into or flowing into the bellows during grouting, thus avoiding increasing the difficulty of recovering the supporting anchor cable. Furthermore, the shape of the fluororubber ring inside the sealing ring causes the fluororubber ring to deform under pressure when the grout wants to flow into the bellows, increasing the contact pressure between the fluororubber ring and the supporting anchor cable, further improving the sealing performance. This improved sealing performance prevents grout from entering the bellows due to operational errors during grouting, thus avoiding increasing the difficulty of recovery. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the end cap of this utility model; Figure 4 This is a schematic diagram of the explosion structure of the intermediate anchor cable of this utility model.

[0025] In the diagram: 1. Bearing body; 2. Reinforcing ring; 3. Pressure bearing head; 4. Corrugated pipe; 5. Supporting anchor cable; 6. Intermediate anchor cable; 7. Pressure bearing plate; 8. Anchor head; 9. End cap; 10. Sealing sleeve; 11. Sealing ring. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] Embodiment 1: A tensioning and locking device for a recyclable anchor cable, as shown in Figures 1-4 the figure, comprises a bearing body 1, wherein a pressure-bearing head 3 is fixed at the bottom of the bearing body 1, a plurality of support anchor cables 5 and a middle anchor cable 6 respectively penetrate through the top of the pressure-bearing head 3, the plurality of support anchor cables 5 are arranged in an annular array with the middle anchor cable 6 as the center of circle, a circular ring formed by the annular array of the plurality of support anchor cables 5 is in interference fit with the pressure-bearing head 3, a corrugated pipe 4 is sleeved at the top end of the bearing body 1, the middle anchor cable 6 is pulled by a hydraulic device to pull the middle anchor cable 6 out of the pressure-bearing head 3, at this moment, a large gap is formed in the pressure-bearing head 3 to allow the plurality of support anchor cables 5 to spread out, and then a worker can directly pull out the support anchor cables 5 manually; The outside of the corrugated pipe 4 is connected with an end cover 9 through a sealing sleeve 10, the section of the end cover 9 is in a convex shape, one end of the middle anchor cable 6 is wrapped by the top protrusion of the end cover 9, the sealing sleeve 10 is in interference fit with the corrugated pipe 4, the sealing sleeve 10 is fixedly connected with the end cover 9 in an adhesion manner by using a special fluororubber adhesive, the sealing sleeve 10 is made of fluororubber material, the bearing body 1, the pressure-bearing head 3 and the end cover 9 are all made of 304 or 316L stainless steel material, a sealing ring 11 penetrates through the top of the end cover 9, the sealing ring 11 consists of a stainless steel framework and a fluororubber ring, the longitudinal section of the fluororubber ring of the sealing ring 11 is in a shape of Chinese character "儿", the stainless steel framework of the sealing ring 11 is fixedly connected with the end cover 9 in a manner of interference assembly first and then micro spot welding, during the grouting process, one end of the corrugated pipe 4 is closed through the end cover 9, during which the gap between the end cover 9 and the corrugated pipe 4 is filled through the sealing sleeve 10, and the gap between the end cover 9 and the support anchor cable 5 is filled through the sealing ring 11, so as to avoid that slurry splashes or flows into the corrugated pipe 4 during grouting and increases the difficulty in recycling the support anchor cable 5; moreover, the shape of the fluororubber ring in the sealing ring 11 enables the fluororubber ring of the sealing ring 11 to be deformed under the pressure applied when the slurry flows towards the inside of the corrugated pipe 4, so that the contact pressure between the fluororubber ring of the sealing ring 11 and the support anchor cable 5 is increased, and the sealing performance is further improved.

[0029] Referring to Figures 1-3 , in the above embodiment, a bearing plate 7 is arranged outside the end cover 9, the top of the bearing plate 7 is connected with an anchor head 8, the anchor head 8 is connected with the support anchor cable 5, one end of the support anchor cable 5 is connected to the anchor head 8, while the other end is connected to the pressure-bearing head 3, when the support anchor cable 5 is tensioned, the pressure-bearing head 3 is stressed and transmits the pulling force to the bearing body 1, the bearing body 1 transmits the pulling force to the surrounding grouting layer through mechanical force and friction force, the grouting layer around the bearing body 1 further transmits the force to the grouting layer of the anchoring section in the form of compressive stress, and finally the grouting layer of the anchoring section transmits the force to the surrounding rock and soil mass in the form of shear stress.

[0030] Embodiment 2: On the basis of the above Embodiment 1, the following arrangement is adopted to improve the stability.

[0031] See Figure 1 and Figure 2 In the above embodiment, the outer ring of the carrier 1 is provided with a plurality of reinforcing rings 2, which are equidistantly distributed. The arrangement of the plurality of reinforcing rings 2 increases the friction between the carrier 1 and the surrounding grouting layer, thereby improving stability.

[0032] The implementation principle of this utility model is as follows: First, during production, workers arrange multiple support anchor cables 5 in a circular array with the central anchor cable 6 as the center. During this process, the multiple anchor cables can be tied together with wire to prevent them from scattering. Then, the support anchor cables 5 and the central anchor cable 6 are placed into the bearing head 3. Afterward, workers use hydraulic pressure to deform the bearing head 3 inward and make it pressurized to form an interference fit with the circular array of multiple support anchor cables 5. The inner ring of the circular ring is also pressurized with the central anchor cable 6. Next, the bellows 4 is fitted onto the end of the bearing body 1 and fixed with a clamp to prevent the bellows 4 from falling off. Workers roughen the inner ring of the end cap 9 and the outer ring of the sealing sleeve 10. Afterward, workers clean the roughened surfaces and coat them with fluororubber. After applying the adhesive, the sealing sleeve 10 is placed inside the end cap 9 and the adhesive is allowed to cure to complete the fixing process. The worker places the end cap 9 on top of a boss, the diameter of which is similar to the diameter of the inner ring of the end cap 9. Then, the sealing ring 11 is placed on top of the end cap 9 and pressed into the end cap 9 using a hydraulic device. The interference fit completes the fixing process. Subsequently, the worker reinforces the seal by micro-spot welding. The micro-spot welding has a small heat-affected zone and a fast cooling rate, which avoids damage to the fluororubber ring and thus helps to reinforce the sealing ring 11, effectively preventing the sealing ring 11 from falling off. Finally, the end cap 9 is fitted onto the end of the bellows 4. The interference fit between the sealing sleeve 10 and the bellows 4 increases the disassembly resistance and reduces the occurrence of the end cap 9 falling off without human intervention. During construction, workers prepare materials and construction machinery. Then, they use a steel casing follow-up drilling process to drill holes in the construction area, which can prevent hole collapse and diameter reduction. After the hole is formed, the hole is cleaned to avoid affecting the grouting strength. Workers put the components of this device, except for the pressure plate 7 and the anchor head 8, into the hole. After the device is put in, workers start the first grouting operation, and perform a second grouting several hours after the first grouting. Care is taken to pull out the pipe to avoid leaving the steel casing in the hole. During grouting, one end of the bellows 4 is sealed by the end cap 9. Meanwhile, the gap between the end cap 9 and the bellows 4 is filled by the sealing sleeve 10, and the gap between the end cap 9 and the supporting anchor cable 5 is filled by the sealing ring 11. This prevents grout from splashing into or flowing into the bellows 4, which would increase the difficulty of recovering the supporting anchor cable 5. Furthermore, the shape of the fluororubber ring inside the sealing ring 11 causes the fluororubber ring to deform under pressure when the grout wants to flow into the bellows 4, increasing the contact pressure between the fluororubber ring 11 and the supporting anchor cable 5, further improving the sealing performance. After grouting is completed... Workers cure the grouting layer and wait for its strength to reach the specified value before preparing for tensioning and locking. Workers also check whether there is grout on the sealing ring 11 and sealing sleeve 10. If so, they clean it in time before the grout solidifies. Grout is easier to find and clean on the outside of the sealing sleeve 10 and sealing ring 11 than grout entering the bellows 4. After curing, workers install the bearing plate 7 and anchor head 8. Then, workers use a staged tensioning method to tension the support anchor cable 5. After tensioning, the support anchor cable 5 is locked through the anchor head 8. The intermediate anchor cable 6 is wrapped by the end cap 9 and does not need to be tensioned and locked. One end of the support anchor cable 5 is connected to the anchor head 8, and the other end is connected to the bearing head 3. When the support anchor cable 5 is tensioned, the bearing head 3 is subjected to force and transmits the pull-out force to the bearing body 1. The bearing body 1 transmits the pull-out force to the surrounding grouting layer through mechanical force and friction. The friction between the bearing body 1 and the surrounding grouting layer is increased by setting multiple reinforcing rings 2, which improves stability. The grouting layer around the bearing body 1 then transmits the force to the grouting layer of the anchoring section in the form of compressive stress. Finally, the grouting layer of the anchoring section transmits the force to the surrounding rock and soil mass in the form of shear stress. When the recovery work begins, the workers remove the anchor head 8, the pressure plate 7, and the end cap 9 in sequence, at which point the intermediate anchor cable 6 is exposed. The workers then use a hydraulic device to pull the intermediate anchor cable 6 out of the pressure head 3, creating a large gap inside the pressure head 3, which causes the multiple support anchor cables 5 to spread out. After that, the workers can manually pull out the support anchor cables 5 directly.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A tensioning and locking device for a recyclable anchor cable, comprising a carrier (1), characterized in that: A pressure-bearing head (3) is fixed at the bottom of the bearing body (1), a supporting anchor cable (5) and a middle anchor cable (6) respectively penetrate through the top of the pressure-bearing head (3), and a corrugated pipe (4) is sleeved at the top end of the bearing body (1); and the exterior of the corrugated pipe (4) is connected with an end cover (9) via a sealing sleeve (10), and a sealing ring (11) penetrates through the top of the end cover (9).

2. The tensioning and locking device for recyclable anchor cables according to claim 1, characterized in that: The bearing body (1), the pressure-bearing head (3) and the end cover (9) are all made of 304 or 316L stainless steel material.

3. The tensioning and locking device for recyclable anchor cables according to claim 1, characterized in that: A plurality of the supporting anchor cables (5) are provided, and the plurality of supporting anchor cables (5) are distributed in an annular array with the middle anchor cable (6) as the center of the circle.

4. The tensioning and locking device for recyclable anchor cables according to claim 3, characterized in that: A circular ring formed by the annular array of the plurality of supporting anchor cables (5) is in interference fit with the pressure-bearing head (3).

5. The tensioning and locking device for a recyclable anchor cable according to claim 1, characterized in that: The sealing sleeve (10) is in interference fit with the corrugated pipe (4), the sealing sleeve (10) is fixedly connected with the end cover (9) by bonding with a special fluororubber adhesive, and the sealing sleeve (10) is made of a fluororubber material.

6. The tensioning and locking device for a recyclable anchor cable according to claim 1, characterized in that: The sealing ring (11) consists of a stainless steel skeleton and a fluororubber ring, the longitudinal section of the fluororubber ring of the sealing ring (11) is in a "h"-shape, and the stainless steel skeleton of the sealing ring (11) is fixedly connected with the end cover (9) by means of micro spot welding after interference assembly.

7. The tensioning and locking device for recyclable anchor cables according to claim 3, characterized in that: The end cover (9) has a "convex"-shaped cross section, and one end of the middle anchor cable (6) is wrapped by the protrusion at the top of the end cover (9).

8. The tensioning and locking device for a recyclable anchor cable according to claim 1, characterized in that: A bearing plate (7) is arranged outside the end cover (9), the top of the bearing plate (7) is connected with an anchor head (8), and the anchor head (8) is connected with the supporting anchor cable (5).

9. The tensioning and locking device for a recyclable anchor cable according to claim 1, characterized in that: A plurality of reinforcing rings (2) are arranged on the outer ring of the bearing body (1), and the plurality of reinforcing rings (2) are distributed at equal intervals.

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