A basalt fiber bar anchor head structure and a slope reinforcement construction method

Abstract

A basalt fiber tendon anchor head structure and a slope reinforcement construction method belong to the field of slope reinforcement. The basalt fiber tendon anchor head structure includes a basalt fiber tendon and a combined pipe body. The combined pipe body includes a lower PVC guiding pipe, a working anchor clamping sleeve, a middle PVC connecting pipe, a tool anchor clamping sleeve, and an upper PVC guiding pipe. A cutting section is formed at the middle position of the middle PVC connecting pipe. The basalt fiber tendon is inserted into the combined pipe body from the lower PVC guiding pipe to a position near the upper PVC guiding pipe in the tool anchor clamping sleeve. The free end strain gauge and the anchor head end strain gauge on the basalt fiber tendon are respectively located in the lower PVC guiding pipe and the middle PVC connecting pipe, and the strain gauge connecting wires of the free end strain gauge and the anchor head end strain gauge are led out from the strain gauge lead pipe of the middle PVC connecting pipe. The space between the basalt fiber tendon and the combined pipe body is filled with organic glue. The slope reinforcement construction method utilizes this anchor head structure to achieve the reinforcement and monitoring of slopes.

Description

Technical Field

[0001] The invention belongs to the field of slope reinforcement, and particularly relates to a basalt fiber tendon anchor head structure and a slope reinforcement construction method. Background Art

[0002] Slope reinforcement projects are common in various engineering constructions such as water conservancy and hydropower, road traffic, and building construction. When the currently commonly used steel material prestressed anchor cables or bolts are used for slope reinforcement, the anchor head structure cannot monitor the prestress. Moreover, due to the steel material, the cutting treatment and protection construction at the anchor head are time-consuming and laborious, and these drawbacks are particularly prominent in engineering environments such as high and steep slopes and alpine canyons.

[0003] As a new type, green, and low-cost material, basalt fiber tendons have great application prospects in slope reinforcement projects. Due to the complex terrain of slopes, the easy tensionability, easy cutability, and easy stress monitorability at the anchor head of basalt fiber tendons in practical applications directly determine the construction convenience and engineering applicability of the tendon materials. How to prepare an anchor head structure that integrates the three properties of "easy tensionability, easy cutability, and easy stress monitorability" is the key to promoting the application of basalt fiber tendons in slope reinforcement projects. Summary of the Invention

[0004] The purpose of the invention is to provide a basalt fiber tendon anchor head structure and a slope reinforcement construction method. Using this anchor head structure is not only convenient for the tensioning and cutting of the basalt fiber tendon at the anchor head, but also can realize the real-time monitoring of the stress conditions of basalt fiber tendons at different positions, having the dual effects of reinforcing and monitoring slope projects.

[0005] To achieve the above purpose, the technical solution adopted by the invention is: a basalt fiber tendon anchor head structure, including a basalt fiber tendon, and further including a combined pipe body. The combined pipe body includes a lower PVC guiding pipe, a working anchor clamping sleeve, a middle PVC connecting pipe, a tool anchor clamping sleeve, and an upper PVC guiding pipe that are sequentially inserted. A cutting section that avoids the working anchor clamping sleeve and the tool anchor clamping sleeve is formed at the middle position of the middle PVC connecting pipe. The basalt fiber tendon is inserted into the combined pipe body from the lower PVC guiding pipe and inserted into the tool anchor clamping sleeve near the upper PVC guiding pipe. The free-end strain gauge and the anchor-end strain gauge pasted on the basalt fiber tendon are respectively located in the lower PVC guiding pipe and the middle PVC connecting pipe, and the strain gauge connecting lines of the free-end strain gauge and the anchor-end strain gauge are led out from the strain gauge lead pipe on the middle PVC connecting pipe. The gap between the basalt fiber tendon and the combined pipe body is filled with organic glue.

[0006] Specifically, the free-end strain gauge is located inside the first end of the lower PVC guiding pipe, and the working anchor clamping sleeve is inserted into the second end of the lower PVC guiding pipe.

[0007] Specifically, the working anchor clamping sleeve is inserted into the first end of the middle PVC connecting pipe, and the tool anchor clamping sleeve is inserted into the second end of the middle PVC connecting pipe. The corresponding part between the end faces of the working anchor clamping sleeve and the tool anchor clamping sleeve is the cutting section.

[0008] Furthermore, the position of the strain gauge at the anchor head end in the middle PVC connecting pipe corresponds to the position of the working anchor clamping sleeve therein.

[0009] Specifically, the outer diameter of the working anchor clamping sleeve is equal to the inner diameters of the lower PVC lead pipe and the middle PVC connecting pipe, and the outer diameter of the tool anchor clamping sleeve is equal to the inner diameters of the middle PVC connecting pipe and the upper PVC lead pipe.

[0010] Specifically, the insertion depth of the working anchor clamping sleeve in the lower PVC lead pipe is less than the length of the lower PVC lead pipe; the insertion depth of the tool anchor clamping sleeve in the upper PVC lead pipe is less than the length of the upper PVC lead pipe.

[0011] Optionally, the insertion depth of the working anchor clamping sleeve in the lower PVC lead pipe is equal to 1 / 3 of the length of the lower PVC lead pipe; the insertion depths of both the working anchor clamping sleeve and the tool anchor clamping sleeve into the middle PVC connecting pipe are 1 / 5 of the length of the middle PVC connecting pipe; the insertion depth of the tool anchor clamping sleeve into the upper PVC lead pipe is 1 / 3 of the length of the upper PVC lead pipe.

[0012] Optionally, the insertion depth of the working anchor clamping sleeve in the lower PVC lead pipe is equal to 1 / 3 of the length of the lower PVC lead pipe; the insertion depths of both the working anchor clamping sleeve and the tool anchor clamping sleeve into the middle PVC connecting pipe are 1 / 3 of the length of the middle PVC connecting pipe; the insertion depth of the tool anchor clamping sleeve into the upper PVC lead pipe is 1 / 3 of the length of the upper PVC lead pipe.

[0013] Specifically, the basalt fiber bar is inserted into the position where the tool anchor clamping sleeve is connected to the upper PVC lead pipe.

[0014] A slope reinforcement construction method, which is carried out by using the basalt fiber bar anchor head structure described above, includes the following steps:

[0015] (1) Keep the basalt fiber bar centered and lower the basalt fiber bar anchor head structure into the slope borehole that has been drilled and installed, so that the lower PVC lead pipe entirely enters the slope borehole, and then inject grouting material into the slope borehole to play a role in borehole anchoring;

[0016] (2) Pass the basalt fiber tendon anchor head structure exposed outside the slope borehole through the jack with a hole in the center. The working anchor is perpendicular to the basalt fiber tendon and is located on the slope surface, and is clamped on the clamping sleeve of the working anchor. The tool anchor is clamped on the clamping sleeve of the tool anchor, and the working anchor and the tool anchor are abutted against the jack with a hole in the center;

[0017] (3) Start the jack with a hole in the center to apply prestress, and the two ends of the jack with a hole in the center respectively push against the working anchor and the tool anchor for graded tensioning; after the tensioning is completed, remove the tool anchor and the jack with a hole in the center, and keep the working anchor clamping the clamping sleeve of the working anchor; the strain gauge at the anchor head end monitors the stress and deformation conditions of the basalt fiber tendon in the working anchor, and the strain gauge at the free end monitors the stress and deformation conditions of the basalt fiber tendon in the slope borehole;

[0018] (4) Use a cutting machine to cut off the middle PVC connecting pipe at the cutting section position on the middle PVC connecting pipe;

[0019] (5) Pour concrete at the remaining anchor head structure outside the slope to form a concrete protection pier to protect the working anchor and the remaining part of the anchor head structure.

[0020] The beneficial effects of the present invention are as follows: 1. The basalt fiber tendon anchor head structure proposed by the present invention integrates the three properties of "easy tensionability, easy cutability, and easy stress monitoring", which can promote the application of basalt fiber tendons in various slope reinforcement projects such as water conservancy and hydropower, road traffic, and building construction. Compared with the traditional steel materials for slope reinforcement, the construction cost is greatly reduced and the construction process is optimized.

[0021] 2. The basalt fiber tendon anchor head structure of the present invention forms a cutting section convenient for cutting at the middle position of the middle PVC connecting pipe, and it can be cut off by using a hand-held cutting machine, making the anchor head easy to cut and process. Compared with the traditional anchor head structure, the construction cost is greatly reduced and the construction process is optimized.

[0022] 3. The basalt fiber tendon anchor head structure of the present invention monitors the stress and deformation conditions of the basalt fiber tendon in the working anchor through the strain gauge at the anchor head end, and monitors the stress and deformation conditions of the basalt fiber tendon at the free end through the strain gauge at the free end. Through this anchor head structure, the stress conditions of the basalt fiber tendon at different parts can be grasped in real time, which is convenient for evaluating the stability of the slope after reinforcement.

[0023] 4. The basalt fiber tendon anchor head structure of the present invention is simple to manufacture and convenient to process. Using this anchor head structure can greatly promote the application of new basalt fiber tendon materials in slope reinforcement projects. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the basalt fiber bar anchor head structure in Embodiment 1;

[0026] Figure 2 It is a schematic diagram of the cutting section of the basalt fiber bar anchor head structure in Embodiment 1;

[0027] Figure 3 It is a schematic diagram of the basalt fiber bar anchor head structure during the tensioning operation in Embodiment 2;

[0028] Figure 4 It is a schematic diagram of the application of the basalt fiber bar anchor head structure in slope reinforcement in Embodiment 2;

[0029] Markings in the figure: 1. Basalt fiber bar, 2. Lower PVC lead pipe, 3. Middle PVC connecting pipe, 4. Upper PVC lead pipe, 5. Working anchor clamping sleeve, 6. Tool anchor clamping sleeve, 7. Free end strain gauge, 8. Anchor head end strain gauge, 9. Strain gauge lead pipe, 10. Strain gauge connecting wire, 11. Strain data collector, 12. Cutting section, 13. Working anchor, 14. Tool anchor, 15. Jack with hole, 16. Slope surface, 17. Centering ring, 18. Slope drilling hole, 19. Grouting material, 20. Concrete protection pier. Detailed implementation manners

[0030] The following will further elaborate on the present invention in conjunction with the drawings and embodiments, but it is not used as a basis for any limitation of the invention.

[0031] Embodiment 1

[0032] As Figure 1 shown, a basalt fiber bar anchor head structure includes a basalt fiber bar 1, a lower PVC lead pipe 2, a middle PVC connecting pipe 3, an upper PVC lead pipe 4, a working anchor clamping sleeve 5, a tool anchor clamping sleeve 6, a free end strain gauge 7, and an anchor head end strain gauge 8.

[0033] The first end of the working anchor clamping sleeve 5 is inserted into the second end of the lower PVC guiding pipe 2, the second end of the working anchor clamping sleeve 5 is inserted into the first end of the middle PVC connecting pipe 3, the first end of the tool anchor clamping sleeve 6 is inserted into the second end of the middle PVC connecting pipe 3, and the second end of the tool anchor clamping sleeve 6 is inserted into the first end of the upper PVC guiding pipe 4. The "first end" and "second end" are referenced to the direction in which the anchor head structure is inserted into the slope borehole during slope reinforcement. During construction, the end facing the slope borehole is the "first end", and the opposite end is the "second end". The insertion depths of the working anchor clamping sleeve 5 into the lower PVC guiding pipe 2 and the middle PVC connecting pipe 3 are both less than the lengths of the corresponding PVC pipes, and the insertion depths of the tool anchor clamping sleeve 6 into the middle PVC connecting pipe 3 and the upper PVC guiding pipe 4 are both less than the lengths of the corresponding PVC pipes. Moreover, as Figure 2 shown, the sum of the insertion depth of the working anchor clamping sleeve 5 into the middle PVC connecting pipe 3 and the insertion depth of the tool anchor clamping sleeve 6 into the middle PVC connecting pipe 3 is less than the length of the middle PVC connecting pipe 3, thereby forming a cutting section 12 in the middle position of the middle PVC connecting pipe 3 where neither the working anchor clamping sleeve 5 nor the tool anchor clamping sleeve 6 is present, serving as the cutting position after the tensioning and locking construction of the slope cable.

[0034] The lower PVC guiding pipe 2, the middle PVC connecting pipe 3, the upper PVC guiding pipe 4, the working anchor clamping sleeve 5, and the tool anchor clamping sleeve 6 form a combined pipe body. Moreover, the outer diameter of the working anchor clamping sleeve 5 is equal to the inner diameters of the lower PVC guiding pipe 2 and the middle PVC connecting pipe 3, and the outer diameter of the tool anchor clamping sleeve 6 is equal to the inner diameters of the middle PVC connecting pipe 3 and the upper PVC guiding pipe 4, so that the working anchor clamping sleeve 5 and the tool anchor clamping sleeve 6 can be tightly connected to the lower PVC guiding pipe 2, the middle PVC connecting pipe 3, and the upper PVC guiding pipe 4.

[0035] Optionally, the insertion depth of the working anchor clamping sleeve 5 in the lower PVC guiding pipe 2 is equal to 1 / 3 of the length of the lower PVC guiding pipe 2; the insertion depths of the working anchor clamping sleeve 5 and the tool anchor clamping sleeve 6 into the middle PVC connecting pipe 3 are both 1 / 3 of the length of the middle PVC connecting pipe 3; the insertion depth of the tool anchor clamping sleeve 6 into the upper PVC guiding pipe 4 is 1 / 3 of the length of the upper PVC guiding pipe 4.

[0036] Optionally, the insertion depth of the working anchor clamping sleeve 5 in the lower PVC guide pipe 2 is equal to 1 / 3 of the length of the lower PVC guide pipe 2; the insertion depths of the working anchor clamping sleeve 5 and the tool anchor clamping sleeve 6 into the middle PVC connecting pipe 3 are both 1 / 5 of the length of the middle PVC connecting pipe 3; the insertion depth of the tool anchor clamping sleeve 6 into the upper PVC guide pipe 4 is 1 / 3 of the length of the upper PVC guide pipe 4.

[0037] The upper part of the basalt fiber bar 1 is inserted into the combined pipe body from the first end of the lower PVC guide pipe 2 until the basalt fiber bar 1 is inserted into the tool anchor clamping sleeve 6. Further, the basalt fiber bar 1 is inserted to the position where the tool anchor clamping sleeve 6 is connected to the upper PVC guide pipe 4.

[0038] The lower PVC guide pipe 2, the middle PVC connecting pipe 3 and the upper PVC guide pipe 4 are all transparent and see-through rigid PVC pipes, and the parameters such as the length, inner diameter and outer diameter of each component are determined according to specific engineering requirements.

[0039] Strain gauges are attached to the basalt fiber bar 1, namely a free-end strain gauge 7 and an anchor-end strain gauge 8. After the basalt fiber bar 1 is inserted into the combined pipe body, the free-end strain gauge 7 is inside the lower PVC guide pipe 2 and close to the first end of the lower PVC guide pipe 2, and the anchor-end strain gauge 8 is inside the middle PVC connecting pipe 3 and corresponds to the position of the working anchor clamping sleeve 5 inserted therein. A strain gauge lead pipe 9 is arranged on the side of the middle PVC connecting pipe 3, and the strain gauge connecting wires 10 of the free-end strain gauge 7 and the anchor-end strain gauge 8 are led out from the strain gauge lead pipe 9, and the led-out strain gauge connecting wires 10 are connected to an external strain data collector 11.

[0040] The gap between the basalt fiber bar 1 and the combined pipe body is also filled with an organic glue, such as epoxy resin glue. The basalt fiber bar 1 is centered and fixed in the combined pipe body by the poured organic glue. When pouring the organic glue, it is poured from the second end port of the upper PVC guide pipe 4, and the organic glue flows from top to bottom to fill the internal gap.

[0041] After pouring the glue, the free-end strain gauge 7 and the anchor-end strain gauge 8 are respectively inside the lower PVC guide pipe 2 and the middle PVC connecting pipe 3, which can protect the strain gauges.

[0042] If the lower PVC conduit 2 and the upper PVC conduit 4 are not provided in the anchor head structure of the present invention, the organic glue will have a certain degree of shrinkage behavior along the axial direction of the basalt fiber tendon 1 after solidification. On the one hand, it will cause the free-end strain gauges 7 pasted on the basalt fiber tendon 1 to be exposed, failing to protect the free-end strain gauges 7; on the other hand, it will cause the glue in the working anchor clamping sleeve 5 and the tool anchor clamping sleeve 6 to be in an uncompacted state, unable to ensure the full bonding of the basalt fiber tendon 1 in the working anchor clamping sleeve 5 and the tool anchor clamping sleeve 6.

[0043] Example 2

[0044] In this embodiment, the slope reinforcement construction is carried out by using the basalt fiber tendon anchor head structure described in Example 1. The specific construction method is as follows:

[0045] 1. Install a plurality of centering rings 17 on the exposed basalt fiber tendon 1 in the basalt fiber tendon anchor head structure and fix them by wire binding. Then, keep the basalt fiber tendon 1 centered and lower the basalt fiber tendon anchor head structure into the slope borehole 18 that has been drilled, so that the lower PVC conduit 2 entirely enters the slope borehole 18. Then, inject grouting material 19 into the slope borehole 18 to play the role of borehole anchoring;

[0046] 2. Pass the anchor head structure exposed outside the slope borehole 18 through the jack 15. The working anchor 13 is perpendicularly located on the slope surface 16 with respect to the basalt fiber tendon 1 and is clamped on the working anchor clamping sleeve 5, and the tool anchor 14 is clamped on the tool anchor clamping sleeve 6. The working anchor 13 and the tool anchor 14 are abutted against the jack 15;

[0047] 3. Start the jack 15 to apply prestress, and the two ends of the jack 15 respectively push against the working anchor 13 and the tool anchor 14 for step-by-step tensioning; after the tensioning is completed, remove the tool anchor 14 and the jack 15. At this time, the working anchor 13 still clamps the basalt fiber tendon 1 in the working anchor clamping sleeve 5. The anchor head end strain gauge 8 monitors the stress and deformation conditions of the basalt fiber tendon 1 in the working anchor 13, and the free-end strain gauge 7 monitors the stress and deformation conditions of the basalt fiber tendon 1 in the slope borehole 18, so as to grasp the stress conditions of the basalt fiber tendon 1 at different positions in real time;

[0048] 4. Use a cutting machine to cut the middle PVC connecting pipe 3 at the cutting section 12 position on the middle PVC connecting pipe 3. When cutting, avoid the strain gauge lead pipe 9; after cutting, the exposed length of the anchor head structure on the slope surface 16 can be reduced, which is convenient for the next construction of the protection pier;

[0049] 5. Pour concrete at the anchor head structure outside the slope to form a concrete protection pier 20 to protect the working anchor 13 and the remaining part of the anchor head structure, and complete the protection of the basalt fiber tendon anchor head structure after construction.

[0050] A basalt fiber tendon anchor head structure and a slope reinforcement construction method proposed by the present invention have been experimentally verified in the reinforcement of the broken rock mass slope at the entrance of Qinglongshan Tunnel in the reconstruction project of the section of National Highway G310 in Luoyang City, Henan Province (from Tiemen Town to the boundary of Sanmenxia City). Due to the characteristics of "easy tensionability, easy cutability and easy stress monitoring" of this anchor head structure, the use of the anchor head structure and the slope reinforcement construction method described in the present invention significantly improves the construction convenience of the basalt fiber tendon for slope reinforcement, and reduces the slope reinforcement project cost (from about 100 yuan per hole to about 25 yuan per hole, a decrease of 3 / 4); in addition, this anchor head structure also realizes the monitoring of the mechanical properties of the reinforcement after slope reinforcement, achieving the effect of integrating slope reinforcement and monitoring. Obviously, the present invention significantly promotes the development and innovation of slope reinforcement technology, and has remarkable economic benefits and engineering effects.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Those of ordinary skill in the art should understand that the specific implementation manners of the present invention can be modified or equivalently replaced by referring to the above embodiments. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the scope of the claims pending for approval.

Claims

1. A basalt fiber tendon anchor head structure, comprising basalt fiber tendons, characterized in that: The utility model also comprises a combined pipe body, which comprises a lower PVC lead pipe, a working anchor clamping sleeve, a middle PVC connecting pipe, a tool anchor clamping sleeve and an upper PVC lead pipe which are plugged in sequence; the middle position of the middle PVC connecting pipe forms a cutting section which avoids the working anchor clamping sleeve and the tool anchor clamping sleeve; the basalt fiber tendon is inserted into the combined pipe body from the lower PVC lead pipe and inserted into the tool anchor clamping sleeve near the upper PVC lead pipe; the free end strain gauge and the anchor head end strain gauge pasted on the basalt fiber tendon are respectively located in the lower PVC lead pipe and the middle PVC connecting pipe, and the strain gauge connecting wires of the free end strain gauge and the anchor head end strain gauge are led out from the strain gauge lead pipe on the middle PVC connecting pipe; the gap between the basalt fiber tendon and the combined pipe body is filled with organic glue.

2. The basalt fiber reinforcement anchor head structure according to claim 1, characterized in that: The free end strain gauge is located on the inner side of the first end of the lower PVC lead pipe, and the working anchor clamping sleeve is inserted into the second end of the lower PVC lead pipe.

3. The basalt fiber reinforcement anchor head structure according to claim 1, characterized in that: The working anchor clamping sleeve is inserted into the first end of the middle PVC connecting pipe, and the tool anchor clamping sleeve is inserted into the second end of the middle PVC connecting pipe. The corresponding part between the end faces of the working anchor clamping sleeve and the tool anchor clamping sleeve is the cutting section.

4. The basalt fiber reinforcement anchor head structure according to claim 3 is characterized in that: The position of the anchor head end strain gauge in the middle PVC connecting pipe corresponds to the position of the working anchor clamping sleeve therein.

5. The basalt fiber reinforcement anchor head structure according to claim 1, characterized in that: The outer diameter of the working anchor clamping sleeve is equal to the inner diameters of the lower PVC guide pipe and the middle PVC connecting pipe, and the outer diameter of the tool anchor clamping sleeve is equal to the inner diameters of the middle PVC connecting pipe and the upper PVC guide pipe.

6. The basalt fiber reinforcement anchor head structure according to claim 1, characterized in that: The insertion depth of the working anchor clamping sleeve in the lower PVC guide pipe is less than the length of the lower PVC guide pipe; the insertion depth of the tool anchor clamping sleeve in the upper PVC guide pipe is less than the length of the upper PVC guide pipe.

7. The basalt fiber reinforcement anchor head structure according to claim 6, characterized in that: The insertion depth of the working anchor clamping sleeve in the lower PVC guide pipe is equal to 1 / 3 of the length of the lower PVC guide pipe; the insertion depth of the working anchor clamping sleeve and the tool anchor clamping sleeve in the middle PVC connecting pipe is both 1 / 5 of the length of the middle PVC connecting pipe; the insertion depth of the tool anchor clamping sleeve in the upper PVC guide pipe is 1 / 3 of the length of the upper PVC guide pipe.

8. The basalt fiber reinforcement anchor head structure according to claim 6, characterized in that: The insertion depth of the working anchor clamping sleeve in the lower PVC guide pipe is equal to 1 / 3 of the length of the lower PVC guide pipe; the insertion depth of the working anchor clamping sleeve and the tool anchor clamping sleeve in the middle PVC connecting pipe is both 1 / 3 of the length of the middle PVC connecting pipe; the insertion depth of the tool anchor clamping sleeve in the upper PVC guide pipe is 1 / 3 of the length of the upper PVC guide pipe.

9. The basalt fiber reinforcement anchor head structure according to claim 1, characterized in that: The basalt fiber reinforcement is inserted into the position where the tool anchor clamping sleeve and the upper PVC guide tube are connected.

10. A slope reinforcement construction method, characterized in that: The method is carried out using the basalt fiber reinforcement anchor head structure as described in any one of claims 1 to 9, and comprises the following steps: (1) Keeping the basalt fiber reinforcement in the center, the basalt fiber reinforcement anchor head structure is lowered into the drilled slope hole, so that the lower PVC guide pipe is completely inserted into the slope hole, and then the grouting material is injected into the slope hole to play the role of drilling anchoring; (2) The basalt fiber reinforcement anchor head structure exposed outside the drilled hole of the slope is passed through the through-hole jack, the working anchor is perpendicular to the basalt fiber reinforcement and is located on the slope surface, and is clamped on the working anchor clamping sleeve, the tool anchor is clamped on the tool anchor clamping sleeve, and the working anchor and the tool anchor are against the through-hole jack; (3) Starting the through-hole jack to apply prestress, and the two ends of the through-hole jack respectively press against the working anchor and the tool anchor to perform graded tensioning; after the tensioning is completed, the tool anchor and the through-hole jack are removed, and the working anchor is kept clamping the working anchor clamping sleeve; the strain gauge at the anchor head end monitors the stress and deformation of the basalt fiber reinforcement in the working anchor, and the strain gauge at the free end monitors the stress and deformation of the basalt fiber reinforcement in the slope borehole; (4) using a cutting machine to cut off the middle PVC connecting pipe at the cutting section position on the middle PVC connecting pipe; (5) Pour concrete at the remaining anchor head structure outside the slope to form a concrete protection pier to protect the working anchor and the remaining part of the anchor head structure.

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