Anchored beam device and its construction method

Abstract

This invention provides an anchor cable beam device and its construction method, relating to the field of roadway support technology. The anchor cable beam device includes a rectangular square tube and a grout stop valve. The internal space of the rectangular square tube can be filled with concrete. Multiple anchor cable holes are arranged at intervals along the length of the rectangular square tube. Each anchor cable hole includes an upper through hole on the upper end face and a lower through hole on the lower end face of the rectangular square tube. The upper and lower through holes correspond one-to-one in the thickness direction of the rectangular square tube. A grouting hole communicating with the internal space of the rectangular square tube is also provided on the lower end face. The grout stop valve is installed at the grouting hole and can seal the grouting hole. Therefore, the rectangular square tube, filled with concrete, can have sufficient strength, rigidity, and high load-bearing capacity. When fixing the anchor cable, the upper end face of the rectangular square tube can abut against the surrounding rock of the roadway, providing sufficient surface area and fully utilizing the support capacity of the anchor cable.

Description

Technical Field

[0001] This invention relates to the field of tunnel support technology, and in particular to an anchor cable beam device and its construction method. Background Technology

[0002] Underground mining is the main method of coal mining in my country. Underground mining requires the excavation of a large number of roadways underground. The use of roadway support to maintain the smooth flow of roadways and the stability of the surrounding rock is of great significance to coal mine construction and production. The basic purpose of roadway support is to mitigate and reduce the movement of the surrounding rock, prevent the roadway cross-section from shrinking excessively, and prevent the collapse of loose and damaged surrounding rock.

[0003] Currently, bolt and cable combined support is the main support method used in coal mine roadways. Bolts reinforce the shallow surrounding rock of the roadway, forming a support structure together with the surrounding rock. Cables connect the bolts to the support structure formed by the shallow surrounding rock and the deeper surrounding rock.

[0004] In related technologies, to effectively improve the overall stability of combined anchor bolt and cable support, workers will install beam-like structures to combine and fix a row of anchor cables together. Currently, in actual construction, the beam-like structures for combined anchor cables mainly include U-shaped steel, I-beams, and channel steel. However, although U-shaped steel has sufficient rigidity for installation, its protective surface area is insufficient; while I-beams and channel steel have a certain protective surface area, their rigidity is relatively poor.

[0005] To address this, a new beam-like structure is needed that can meet both the stiffness requirements and the sufficient surface area to support the surrounding rock of the tunnel. Summary of the Invention

[0006] This invention provides an anchor cable beam device and its construction method to solve the defect in the prior art that the beam structure cannot simultaneously meet the stiffness requirements and sufficient protective surface area when combining multiple anchor rods.

[0007] According to a first aspect of the present invention, an anchor cable beam device is provided, comprising:

[0008] A rectangular square tube, the internal space of which can be filled with concrete, and a plurality of anchor cable holes are arranged at intervals along the length of the rectangular square tube. The anchor cable holes include an upper through hole on the upper end face of the rectangular square tube and a lower through hole on the lower end face of the rectangular square tube. The upper through hole and the lower through hole correspond one-to-one in the thickness direction of the rectangular square tube. The lower end face is also provided with a grouting hole that connects to the internal space of the rectangular square tube.

[0009] A grout stop valve is installed at the grouting hole and is capable of sealing the grouting hole.

[0010] According to an anchor cable beam device provided by the present invention, the spacing between adjacent anchor cable holes is 1000mm to 2000mm.

[0011] According to the present invention, the lengths of the upper end face and the lower end face are 1800mm to 5000mm.

[0012] According to an anchor cable beam device provided by the present invention, the thickness of the rectangular square tube is 50mm to 80mm, and the width of the rectangular square tube is 250mm to 300mm.

[0013] According to the present invention, the wall thickness of the rectangular tube is 5mm to 8mm.

[0014] According to an anchor cable beam device provided by the present invention, the grout stop valve includes a support body, a push block, a connecting rod, and a plurality of sealing flanges. The plurality of sealing flanges are arranged around the outer periphery of the support body, and one end of each sealing flange is hinged to an end of the support body. The push block is coaxially arranged with the support body and is located at the other end of the support body. The connecting rod and the sealing flanges are arranged in a one-to-one correspondence. One end of the connecting rod is hinged to the sealing flange, and the other end is hinged to the push block.

[0015] The push block can move from a first position away from the support to a second position close to the support. When the push block is in the first position, the plurality of sealing fins are attached to the outer periphery of the support. When the push block moves from the first position to the second position, the push block can push the plurality of sealing fins to unfold through the connecting rod.

[0016] According to an anchor cable beam device provided by the present invention, the thickness of the sealing wing is 8mm to 12mm, and the length of the sealing wing is at least 20mm.

[0017] According to a second aspect of the present invention, a construction method based on an anchor beam device as described in any one of the first aspects is provided, the construction method comprising:

[0018] Based on the cross-section of the surrounding rock of the roadway and the parameters of the anchor cable support, select rectangular square tubes with appropriate specifications;

[0019] Place the anchoring agent into the anchor cable hole in the surrounding rock of the roadway, let one end of the anchor cable pass through the anchor cable hole through the rectangular square tube, and insert it into the anchor cable hole in the surrounding rock of the roadway. Then, press the rectangular square tube tightly against the surrounding rock of the roadway, and then stir the anchor cable.

[0020] An elastic washer is fitted onto the other end of the anchor cable, and the elastic washer is made to abut against the rectangular square tube. Then, the anchor cable tray and the lock are installed in sequence on the other end of the anchor cable.

[0021] After the anchoring agent solidifies, the anchor cable is tensioned so that the rectangular square tube is tightly attached to the surrounding rock of the tunnel to achieve hole sealing;

[0022] After all the anchor cables are installed, use a grouting pump to pour concrete into the rectangular tube.

[0023] After grouting is completed, the grouting holes of the rectangular square tube are sealed using a grout stop valve.

[0024] After the sealing of the holes was completed, the construction and installation of the anchor cable beam device were finished.

[0025] According to a construction method provided by the present invention, the concrete delivered by the grouting pump has a strength grade of at least C20, and the maximum grouting pressure is at least 1 MPa.

[0026] According to a construction method provided by the present invention, the height of the elastic washer is 40mm to 70mm, the thickness of the elastic washer is 20mm to 40mm, and the inner diameter of the elastic washer is 0.5mm to 1.5mm larger than the diameter of the anchor cable.

[0027] The anchor cable beam device of this invention includes a rectangular square tube and a grout stop valve. The rectangular square tube, filled with concrete, possesses sufficient strength, rigidity, and high load-bearing capacity. When fixing the anchor cable, the upper end of the rectangular square tube can abut against the surrounding rock of the roadway, providing sufficient surface area to fully utilize the support capacity of the anchor cable. Compared to existing beam structures, this device can form a large-area rigid load-bearing body on the surface of the roadway surrounding rock, significantly improving the stability of the roadway surrounding rock, reducing roadway deformation, and ensuring unobstructed roadway operation. Furthermore, the device can be customized in size to meet the needs of roadways with different cross-sections. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the rectangular square tube in an anchor cable beam device according to an embodiment of the present invention;

[0030] Figure 2 It is along Figure 1 A cross-sectional view taken along the AA direction;

[0031] Figure 3 It is along Figure 1 A cross-sectional view taken along the BB direction;

[0032] Figure 4 It is along Figure 1 A cross-sectional view taken along the CC direction;

[0033] Figure 5 This is a schematic diagram of the grout stop valve in an anchor beam device according to an embodiment of the present invention, wherein the push block is located in the first position;

[0034] Figure 6 This is a schematic diagram of the grout stop valve in an anchor beam device according to one embodiment of the present invention, wherein the push block is located in the second position;

[0035] Figure 7 This is a schematic flowchart of a construction method according to one embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of an anchor cable beam device installed in the surrounding rock of a roadway according to one embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of an elastic washer according to one embodiment of the present invention.

[0038] Figure label:

[0039] 1. Rectangular tube; 10. Internal space; 11. Upper end face; 12. Lower end face; 13. Upper through hole; 14. Lower through hole; 15. Grouting hole; 2. Grout stop valve; 21. Support body; 22. Push block; 23. Connecting rod; 24. Sealing wing; 3. Roadway surrounding rock; 4. Anchor cable hole; 5. Anchor cable; 6. Elastic washer; 7. Anchor cable tray; 8. Lock; 9. Concrete. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0041] In one embodiment of the present invention, an anchor cable beam device and its construction method are provided. The anchor cable beam device includes a rectangular square tube and a grout stop valve. The rectangular square tube has an internal space that can be filled with concrete, and the grout stop valve can seal the internal space to prevent concrete from flowing out. In practical use, the rectangular square tube filled with concrete can simultaneously fix multiple anchor cables in a row, and the rectangular square tube can be fitted to the surrounding rock of the roadway, providing sufficient surface protection area. Thus, an anchor cable beam with both sufficient rigidity and sufficient surface protection area can be formed on the roadway surface, solving the problem that existing anchor cable beams are difficult to balance in terms of rigidity and surface protection area. The following is combined with... Figures 1 to 9 The anchor cable beam device and its construction method in this embodiment are further described below.

[0042] Specifically, the anchor cable beam device in this embodiment includes: a rectangular square tube 1 and a grout stop valve 2. Wherein, as... Figures 1 to 4 As shown, the rectangular tube 1 has an internal space 10 that can be filled with concrete. The rectangular tube 1 includes an upper end face 11 and a lower end face 12, which extend along the length of the rectangular tube 1 and are spaced apart along the thickness of the rectangular tube 1. Anchor holes are arranged at intervals along the length of the rectangular tube 1. The anchor holes include an upper through hole 13 on the upper end face 11 and a lower through hole 14 on the lower end face 12. The upper through hole 13 and the lower through hole 14 correspond one-to-one in the thickness of the rectangular tube 1. The lower end face 12 is also provided with a grouting hole 15 that connects to the internal space 10 of the rectangular tube. A grout stop valve 2 is installed at the grouting hole 15 and can seal the grouting hole 15.

[0043] For example, the rectangular tube 1 can be constructed from a square tube with a certain length and a rectangular cross-section. The rectangular tube 1 may include an upper end face 11 and a lower end face 12, as well as a front end face and a rear end face. The upper end face 11, lower end face 12, front end face, and rear end face all extend along the length direction of the rectangular tube. The upper end face 11 and lower end face 12 are spaced apart along the thickness direction of the rectangular tube 1. The upper end face 11, front end face, lower end face 12, and rear end face are sequentially connected to form a long, hollow rectangular structure. Furthermore, both ends of the rectangular tube 1 can be sealed via a left connecting plate and a right connecting plate. Thus, the upper end face 11, lower end face 12, front end face, rear end face, and the left and right connecting plates together form an internal space 10 capable of accommodating concrete.

[0044] To facilitate anchor cable fixing, the rectangular tube 1 has multiple anchor cable holes, allowing multiple anchor cables in a row to be inserted and fixed within the rectangular tube 1 via these holes. In this embodiment, the anchor cable holes include an upper through hole 13 on the upper end face 11 and a lower through hole 14 on the lower end face 12. Thus, a single anchor cable can pass sequentially through the lower through hole 14 and the upper through hole 13, and ultimately be inserted into the anchor cable hole in the surrounding rock of the tunnel.

[0045] The lower end face 12 is also provided with a grouting hole 15, through which concrete can be injected into the internal space 10. After the concrete is injected, the grout stop valve 2 can be installed in the grouting hole 15 and sealed, thereby preventing the concrete in the internal space 10 from flowing out of the grouting hole 15.

[0046] During actual construction, after the anchor holes in the surrounding rock of the tunnel are drilled, the anchoring agent can be injected into the anchor holes. Then, one end of the anchor cable is passed through the anchor hole, through the rectangular tube 1, and inserted into the anchor hole in the surrounding rock of the tunnel, while the upper end face 11 of the rectangular tube 1 abuts against the surrounding rock of the tunnel.

[0047] Next, an elastic washer, an anchor plate, and a locking device are sequentially fitted onto the other end of the anchor cable, allowing the elastic washer to abut against the lower end face 12 of the rectangular tube 1. After the anchoring agent solidifies, the anchor cable is tensioned. When the anchor cable is tensioned, the anchor plate compresses the elastic washer, causing the elastic washer to seal the lower through hole 14 of the lower end face 12. At this time, the upper end face 11 can tightly adhere to the surrounding rock of the tunnel, and the upper through hole 13 of the upper end face 11 can also be sealed.

[0048] Then, concrete is poured into the internal space 10 of the rectangular tube 1 through the grouting hole 15, so that the entire internal space 10 is filled with concrete, thereby improving the rigidity and load-bearing capacity of the rectangular tube 1.

[0049] Finally, after the concrete is poured, the grout stop valve 2 is installed in the grouting hole 15 to seal the concrete and prevent it from flowing out of the grouting hole 15.

[0050] Therefore, the anchor cable beam device in this embodiment includes a rectangular square tube and a grout stop valve. By injecting concrete into the rectangular square tube, its rigidity and bearing capacity can be effectively improved. Moreover, its upper end face 11 can abut against the surrounding rock of the roadway, providing sufficient surface area to fully utilize the support capacity of the anchor cable.

[0051] Meanwhile, the device has a simple structure and can be customized in size according to actual usage requirements, thus making it suitable for tunnels with different cross-sections.

[0052] In addition, in practical applications, the rectangular square tubes are transported separately from the concrete. For the same size, the rectangular square tubes are one-third lighter than the existing U29 anchor cable beams, which facilitates transportation and on-site construction by workers.

[0053] For example, the spacing between anchor holes can be selected according to the anchor support parameters, for example, the spacing between adjacent anchor holes is 1000mm to 2000mm.

[0054] For example, such as Figure 1As shown, the length of the rectangular tube 1 can also be selected according to the needs of roadway support. For example, the length M of the upper end face 11 and the lower end face 12 is 1800mm to 5000mm.

[0055] In a specific embodiment, such as Figure 1 As shown, the thickness P of the rectangular square tube 1 is 50mm to 80mm, and the width N of the rectangular square tube 1 is 250mm to 300mm. For example, the thickness of the rectangular square tube 1 can be 80mm, and the width of the rectangular square tube 1 can be 300mm.

[0056] Furthermore, in order to ensure that the rectangular square tube 1 has sufficient structural strength, the wall thickness of the rectangular square tube 1 is 5mm to 8mm.

[0057] For example, the wall thickness of rectangular tube 1 can be 5mm.

[0058] In order to achieve effective sealing of the grouting hole 15, in this embodiment, as follows: Figure 5 and Figure 6 As shown, the slurry stop valve 2 includes a support body 21, a push block 22, a connecting rod 23, and multiple sealing blades 24. The multiple sealing blades 24 are arranged around the outer periphery of the support body 21, and one end of the multiple sealing blades 24 is hinged to the end of the support body 21. The push block 22 is coaxially arranged with the support body 21 and is located at the other end of the support body 21. The connecting rod 23 and the sealing blades 24 are arranged in a one-to-one correspondence. One end of the connecting rod 23 is hinged to the sealing blade 24, and the other end is hinged to the push block 22.

[0059] The push block 22 can move from a first position away from the support body 21 to a second position close to the support body 21. When the push block 22 is in the first position, multiple sealing wing pieces 24 are attached to the outer periphery of the support body 21. When the push block 22 moves from the first position to the second position, the push block 22 can push the multiple sealing wing pieces 24 to unfold through the connecting rod 23.

[0060] In practical use, such as Figure 5 As shown, the push block 22 can always be in the first position, at which time multiple sealing vanes 24 are attached to the outer periphery of the support body 21. When it is necessary to seal the grouting hole 15, the grout stop valve 2 can be inserted into the grouting hole 15. Then, the push block 22 is pushed from the first position to the second position, so that multiple sealing vanes 24 can be deployed simultaneously. The deployed sealing vanes 24 can both surround the outer periphery of the grouting hole 15 and attach to the inner wall of the lower end face 12, thereby achieving the sealing of the grouting hole 15.

[0061] In one embodiment, the sealing wing 24 is formed with a groove, the connecting rod 23 is placed in the groove, and when the push block 22 moves to the second position, the connecting rod 23 can enter the groove in the state of pushing the multiple sealing wings 24 to unfold, so that the sidewall of the sealing wing 24 can fully fit against the inner wall of the lower end face 12.

[0062] For example, in order to ensure that the grout stop valve 2 has sufficient load-bearing capacity to ensure that concrete does not flow out of the grouting hole after the anchor cable is stressed, the thickness of the sealing wing 24 is 8 mm to 12 mm, and the length of the sealing wing 24 is at least 20 mm.

[0063] For example, the thickness of the sealing fin 24 can be 10 mm.

[0064] As described above, this embodiment also provides a construction method based on the anchor cable beam device of this embodiment, such as... Figure 7 As shown, the construction method in this embodiment includes:

[0065] S1: Select rectangular square tubes with appropriate specifications based on the cross-section of the surrounding rock of the tunnel and the parameters of the anchor cable support.

[0066] S2: Place the anchoring agent into the anchor cable hole in the surrounding rock of the roadway, let one end of the anchor cable pass through the anchor cable hole through the rectangular square tube, and insert it into the anchor cable hole in the surrounding rock of the roadway. Then, press the rectangular square tube tightly against the surrounding rock of the roadway, and then stir the anchor cable.

[0067] S3: Fit an elastic washer onto the other end of the anchor cable and make the elastic washer abut against the rectangular square tube. Then install the anchor cable tray and lock in sequence on the other end of the anchor cable.

[0068] S4: After the anchoring agent has solidified, tension the anchor cable so that the rectangular square tube is tightly attached to the surrounding rock of the tunnel to achieve hole sealing;

[0069] S5: After all anchor cables are installed, use a grouting pump to pour concrete into the rectangular tube.

[0070] S6: After grouting is completed, the grouting holes of the rectangular square tube are sealed using a grout stop valve;

[0071] S7: After the sealing is completed, the construction and installation of the anchor cable beam device is finished.

[0072] Understandable, such as Figure 8As shown, in this construction method, the actual usage requirements of the construction site are first determined, such as the cross-section of the surrounding rock 3 of the tunnel and the parameters of the anchor cable support, to determine the appropriate specifications of the rectangular square tube 1. Then, anchoring agent is placed in the anchor cable hole 4 drilled in the surrounding rock 3 of the tunnel, and one end of the anchor cable 5 is inserted into the anchor cable hole 4 of the surrounding rock 3 through the rectangular square tube 1, so that the rectangular square tube 1 fits against the surrounding rock 3 of the tunnel. At the same time, by stirring the anchor cable 5, the anchor cable 5 can be mixed together with the anchoring agent in the anchor cable hole 4 to facilitate the fixing of the anchor cable.

[0073] Next, the elastic washer 6 is inserted from the other end of the anchor cable 5, and the elastic washer 6 is made to abut against the lower through hole of the rectangular square tube 1. Then the anchor cable tray 7 and the lock 8 are installed in sequence.

[0074] After the anchoring agent solidifies, the anchor cable 5 is tensioned. On the one hand, the rectangular tube 1 is pressed tightly against the surrounding rock 3 of the roadway to seal the upper through hole. On the other hand, the elastic washer 6 is squeezed into the lower through hole to seal the lower through hole.

[0075] The same method was used to install all the anchor cables 5. After all the anchor cables 5 were installed, concrete 9 was poured into the rectangular square tube 1 using a grouting pump.

[0076] Finally, after grouting is completed, the grouting holes of the rectangular square tube 1 are sealed using the grout stop valve 2. After sealing, the construction and installation of the anchor cable beam device are completed.

[0077] Furthermore, in order to ensure that the concrete 9 can fill the entire internal space of the rectangular tube 1 and to ensure that the rectangular tube 1 has sufficient rigidity and high load-bearing capacity, the concrete delivered by the grouting pump must have a strength grade of at least C20 and the maximum grouting pressure must be at least 1 MPa.

[0078] In one embodiment, such as Figure 9 As shown, the height of the elastic washer 6 is 40mm to 70mm, the thickness of the elastic washer 6 is 20mm to 40mm, and the inner diameter of the elastic washer 6 is 0.5mm to 1.5mm larger than the diameter of the anchor cable.

[0079] Therefore, the anchor cable beam device and its construction method in this embodiment have the following advantages:

[0080] The anchor cable beam device in this embodiment includes a rectangular square tube and a grout stop valve. The rectangular square tube, filled with concrete, possesses sufficient strength, rigidity, and high load-bearing capacity. When fixing the anchor cable, the upper end of the rectangular square tube can abut against the surrounding rock of the roadway, providing sufficient surface area to fully utilize the support capacity of the anchor cable. Compared to existing beam structures, this device can form a large-area rigid load-bearing body on the surface of the surrounding rock, significantly improving the stability of the surrounding rock, reducing roadway deformation, and ensuring unobstructed roadway operation. Furthermore, the device can be customized in size to meet the needs of roadways with different cross-sections.

[0081] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anchor beam arrangement, characterized in that include: A rectangular square tube, the internal space of which can be filled with concrete, and a plurality of anchor holes are arranged at intervals along the length of the rectangular square tube. The anchor holes include an upper through hole on the upper end face of the rectangular square tube and a lower through hole on the lower end face of the rectangular square tube. The upper through hole and the lower through hole correspond one-to-one in the thickness direction of the rectangular square tube. The lower end face is also provided with a grouting hole that connects to the internal space of the rectangular square tube. A grout stop valve, which is installed at the grouting hole and is capable of sealing the grouting hole; The slurry stop valve includes a support body, a push block, a connecting rod, and multiple sealing blades. The multiple sealing blades are arranged around the outer periphery of the support body, and one end of each sealing blade is hinged to the end of the support body. The push block is coaxially arranged with the support body and is located at the other end of the support body. The connecting rod and the sealing blades are arranged in a one-to-one correspondence. One end of the connecting rod is hinged to the sealing blade, and the other end is hinged to the push block. The push block can move from a first position away from the support to a second position close to the support. When the push block is in the first position, the plurality of sealing fins are attached to the outer periphery of the support. When the push block moves from the first position to the second position, the push block can push the plurality of sealing fins to unfold through the connecting rod.

2. The mooring beam apparatus of claim 1, wherein, The spacing between adjacent anchor holes is 1000mm to 2000mm.

3. An anchor beam apparatus as claimed in claim 2, wherein, The lengths of the upper end face and the lower end face are 1800mm to 5000mm.

4. The mooring beam apparatus of claim 1, wherein, The thickness of the rectangular tube is 50mm to 80mm, and the width of the rectangular tube is 250mm to 300mm.

5. The mooring beam apparatus of claim 1, wherein, The wall thickness of the rectangular tube is 5mm to 8mm.

6. The mooring beam apparatus of claim 1, wherein, The thickness of the sealing wing is 8mm to 12mm, and the length of the sealing wing is at least 20mm.

7. A construction method based on the anchor beam device according to any one of claims 1 to 6, characterized in that, The construction method includes: Based on the cross-section of the surrounding rock of the roadway and the parameters of the anchor cable support, select rectangular square tubes with appropriate specifications; Place the anchoring agent into the anchor cable hole in the surrounding rock of the roadway, let one end of the anchor cable pass through the anchor cable hole through the rectangular square tube, and insert it into the anchor cable hole in the surrounding rock of the roadway. Then, press the rectangular square tube tightly against the surrounding rock of the roadway, and then stir the anchor cable. An elastic washer is fitted onto the other end of the anchor cable, and the elastic washer is made to abut against the rectangular square tube. Then, the anchor cable tray and the lock are installed in sequence on the other end of the anchor cable. After the anchoring agent solidifies, the anchor cable is tensioned so that the rectangular square tube is tightly attached to the surrounding rock of the tunnel to achieve hole sealing; After all the anchor cables are installed, use a grouting pump to pour concrete into the rectangular tube. After grouting is completed, the grouting holes of the rectangular square tube are sealed using a grout stop valve. After the sealing of the holes was completed, the construction and installation of the anchor cable beam device were finished.

8. The construction method according to claim 7, characterized in that, The concrete delivered by the grouting pump has a strength grade of at least C20, and the maximum grouting pressure is at least 1 MPa.

9. The construction method according to claim 7, characterized in that, The height of the elastic washer is 40mm to 70mm, the thickness of the elastic washer is 20mm to 40mm, and the inner diameter of the elastic washer is 0.5mm to 1.5mm larger than the diameter of the anchor cable.

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