Supporting structure for filling fault grouting reinforcement and water plugging and construction method thereof

Abstract

This invention belongs to the field of tunnel construction technology. It discloses a support structure and construction method for grouting reinforcement and water plugging of faults, comprising: a grouting reinforcement component including several grouting anchors, the grout outlets of which extend into the fault and are located above the tunnel excavation direction; multiple grout outlets circumferentially arranged at the grout outlets of the anchors; grout forming solidified masses at the outlets of the anchors; an anchor cable component passing through the reinforcement layer within the fault and fixed to the rock mass on both sides of the fault; a water-stopping layer injected into the reinforcement layer through the grouting anchors; and a pipe roof component fixed to the inner wall of the tunnel, used to separate the tunnel interior from the reinforcement layer. This invention can improve the reinforcement and water-stopping effects of faults while reducing construction costs.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction technology, and in particular relates to a support structure and construction method for filling faults, grouting reinforcement, and water plugging. Background Technology

[0002] During tunnel excavation, faults may be encountered. These faults are filled with materials such as silty sand, rock fragments, and debris. Most of these materials lack cohesion and contain water. When the tunnel is excavated to the fault location, the mixture of silty sand and water enters the tunnel, affecting the normal construction of the tunnel.

[0003] In existing technologies, to solve the above problems, it is necessary to reinforce and block water at the fault. The conventional reinforcement method is to grout the fault location above the tunnel excavation and then lay a water-blocking structure after grouting. However, in the conventional grouting method, after the grout is discharged from the outlet end of the grouting anchor, it can only spread along a certain surface of the fault, resulting in poor sealing effect. In order to ensure the reinforcement effect, a large amount of grouting is required. At the same time, in order to ensure the water-blocking effect, the requirements for the water-blocking structure are high. The above reinforcement and water-blocking methods result in high construction costs. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a support structure and construction method for grouting reinforcement and water plugging of faults, which can improve the reinforcement and water-blocking effects of faults while reducing construction costs.

[0005] To achieve the above objectives, the present invention provides a support structure for grouting reinforcement and water plugging of faults, comprising:

[0006] The grouting reinforcement component includes several grouting anchors. The grouting end of the grouting anchor extends into the fault and is located above the tunnel excavation direction. The grouting end of the grouting anchor is provided with multiple grout outlets in the circumferential direction. The grouting end of the grouting anchor forms a solidified body, and several of the solidified bodies form a reinforcement layer.

[0007] An anchor cable assembly passes through the reinforcement layer within the fault and is fixed to the rock mass on both sides of the fault;

[0008] A waterproof layer is injected into the reinforcement layer via the grouting anchor bolts;

[0009] A pipe roof assembly is fixed to the inner wall of the tunnel, and the pipe roof assembly is used to separate the tunnel interior from the reinforcement layer.

[0010] Furthermore, the grouting anchor bolt includes an anchor bolt body and an anchor bolt head fixed at one end of the anchor bolt body. One end of the anchor bolt body is located on the inner wall of the tunnel, and the other end of the anchor bolt body and the anchor bolt head extend into the fault.

[0011] The anchor head is a hollow spherical structure, and the grout outlet is a plurality of grout outlet pipes circumferentially fixed on the outer wall of the anchor head, and the grout outlet pipes are connected to the inside of the anchor head.

[0012] Furthermore, a sealing capsule is provided inside the anchor bolt body, the sealing capsule is inserted into the anchor bolt head, the diameter of the slurry inlet end of the slurry outlet pipe is smaller than the diameter of the sealing capsule, and the sealing capsule is used to seal the slurry inlet end of the slurry outlet pipe from which the slurry is discharged.

[0013] Furthermore, the anchor cable assembly includes at least one prestressed anchor cable, one end of which is fixed to the inner wall of the tunnel, and the other end of which passes through the reinforcement layer and is fixed to the rock mass.

[0014] Furthermore, the grouting anchor injects acrylic epoxy resin chemical grout into the reinforcement layer to form the waterproof layer, the thickness of which is less than the thickness of the reinforcement layer.

[0015] Furthermore, the pipe roof assembly includes at least two advanced pipe roof layers, with gaps between adjacent advanced pipe roof layers. The front end of the lower advanced pipe roof layer protrudes beyond the front end of the upper advanced pipe roof layer, and the front end of the advanced pipe roof layer is in the tunnel excavation direction.

[0016] A construction method for grouting reinforcement and water plugging of faults, comprising the following steps:

[0017] S1. Construction reinforcement layer: Several grouting anchors are inserted into the fault, and grout is injected into the grouting anchors to form a solidified body in the fault.

[0018] Construction anchor cable assembly: Install one end of the anchor cable assembly into the inner wall of the tunnel, fix the other end of the anchor cable assembly to the rock on the other side of the fault and apply prestress;

[0019] Construction of waterproof layer: Injecting waterproof material into the grouting anchor rod to form a waterproof layer within the fault;

[0020] Construction pipe roof assembly: The pipe roof assembly is constructed into the inner wall of the tunnel. The pipe roof assembly passes through the fault and supports the reinforcement layer;

[0021] S2, Tunnel Excavation: Excavate a tunnel in the direction of the fault and pass through the fault.

[0022] Furthermore, in step S1, during the construction of the reinforcement layer, after the grouting anchor has injected grout into the fault for a predetermined time, a sealing capsule is inserted into the anchor body.

[0023] Furthermore, in step S1, during the construction of the reinforcement layer, the solidified body outside the anchor head is a spherical structure, and the solidified body and the anchor head are fixed within the fault.

[0024] Furthermore, in step S1, when constructing the waterproof layer, the cement grout in the grouting anchor is replaced with waterproof material.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] 1. By designing the grout outlet end of the grouting anchor, the grout discharged from the grout outlet end will not spread along a certain surface of the fault, but will solidify around the grout outlet end of the grouting anchor to form a solidified layer. Multiple solidified layers work together to form a reinforcement layer within the fault, effectively reinforcing the fault.

[0027] 2. By injecting water-resistant material into the fault using grouting anchors, a water-resistant layer can be formed, which can effectively block water in the fault. The water-resistant layer works in conjunction with the reinforcement layer to isolate and reinforce the fault. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a structural diagram of the support structure;

[0030] Figure 2 This is a structural schematic diagram showing the connection relationship between the grouting anchor and the solid structure.

[0031] Figure 3 A schematic diagram of the structure in which the sealing capsule blocks the slurry outlet tube;

[0032] Figure 4 A structural diagram showing the positional relationship of multiple advanced pipe roof layers;

[0033] Figure 5 This is a schematic diagram of the structure of Example 2;

[0034] Figure 6 This is a perspective view of Example 3;

[0035] Among them, 1-grouting anchor, 101-anchor body, 102-anchor head, 103-grout outlet pipe, 104-spring piece, 2-fault, 3-tunnel, 4-solidified body, 5-reinforcement layer, 6-waterproof layer, 7-sealing capsule, 8-prestressed anchor cable, 9-rock mass, 10-advanced pipe roof layer. Detailed Implementation

[0036] 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 some embodiments of the present invention, and not all embodiments. 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.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] Reference Figures 1-4 The present invention provides a support structure for filling fault grouting reinforcement and water plugging, comprising: a grouting reinforcement component, including a plurality of grouting anchors 1, the grouting end of the grouting anchor 1 extending into the fault 2 and located above the tunnel 3 excavation direction, the grouting end of the grouting anchor 1 being provided with a plurality of grout outlets circumferentially, the grouting end of the grouting anchor 1 forming a solid 4, and the plurality of solid 4 forming a reinforcement layer 5.

[0040] In existing technologies, when grouting fault 2, since there are only a few grout outlets on the grouting anchor rod 1, the grout diffuses along a certain surface within fault 2 under pressure. To ensure the reinforcement effect, a large amount of grouting is required within fault 2, leading to increased grouting costs. In this technical solution, multiple grout outlets are circumferentially arranged at the grout outlet end of the grouting anchor rod 1. The grout is discharged from multiple outlets and moves in different directions. The grout accumulates and solidifies around the end of the grouting anchor rod 1, forming a solidified body 4. By inserting multiple grouting anchor rods 1 into fault 2, a solidified body 4 is formed at the end of each grouting anchor rod 1. The multiple solidified bodies 4 may or may not contact each other to form a reinforcement layer 5. The multiple solidified bodies 4 and the multiple grouting anchor rods 1 work together to fix the fault 2, effectively reinforcing fault 2.

[0041] An anchor cable assembly passes through the reinforcement layer 5 within the fault 2 and is fixed to the rock masses 9 on both sides of the fault 2. Based on the reinforcement layer 5, the anchor cable assembly is installed on the fault 2. The anchor cable assembly is used to connect the rock masses 9 or soil layers on both sides of the fault 2 and to apply prestress to further reinforce the fault 2.

[0042] The water-proof layer 6 is injected into the reinforcement layer 5 through the grouting anchor 1. Since the fault 2 contains water, its flow would erode the reinforcement layer 5 if not blocked. Therefore, water-proof material is injected into the location of the reinforcement layer 5 within the fault 2 through the grouting anchor 1. This water-proof material forms the water-proof layer 6 within the fault 2, preventing water flow.

[0043] The pipe roof assembly is fixed to the inner wall of tunnel 3 and serves to separate the interior of tunnel 3 from the reinforcement layer 5. The pipe roof assembly provides support to the inner wall of tunnel 3 and separates the reinforcement layer 5 from the interior of tunnel 3.

[0044] Specifically, the pipe roof assembly is an arc-shaped support structure used to support the inner and side walls of the tunnel top.

[0045] Further optimize the plan, referring to Figure 2 The grouting anchor 1 includes an anchor body 101 and an anchor head 102 fixed to one end of the anchor body 101. One end of the anchor body 101 is located on the inner wall of the tunnel 3, and the other end of the anchor body 101 and the anchor head 102 extend into the fault 2. The anchor body 101 is installed in the rock mass 9, and the anchor head 102 extends into the fault 2. When installing the grouting anchor 1, a borehole is drilled in the inner wall of the tunnel 3 to communicate with the fault 2. Then, the anchor head 102 and the anchor body 101 are inserted into the borehole and placed into the fault 2. Grout is injected into the anchor body 101, and the grout flows through the anchor body 101 and is discharged into the fault 2 through the anchor head 102.

[0046] After grouting is completed, the gap between the anchor bolt body 101 and the borehole is sealed.

[0047] The anchor head 102 is a hollow spherical structure. The grout outlet is a number of grout outlet pipes 103 that are circumferentially fixed to the outer wall of the anchor head 102. The grout outlet pipes 103 are connected to the inside of the anchor head 102.

[0048] The grout enters the anchor head 102 and is discharged in different directions through different grout outlet pipes 103. Since the grout outlet pipes 103 are circumferentially arranged on the anchor head 102, the discharged grout forms a spherical or similar spherical area around the anchor head 102. After the grout in this area solidifies, it is fixed to the anchor head 102. At the same time, the solidified grout in this area forms a solidified body 4.

[0049] Further optimize the plan, referring to Figure 3 An anchor bolt body 101 is provided with a sealing capsule 7, which is inserted into the anchor bolt head 102. The diameter of the grout inlet end of the grout outlet pipe 103 is smaller than the diameter of the sealing capsule 7. The sealing capsule 7 is used to seal the grout inlet end of the grout outlet pipe 103 that discharges grout.

[0050] Understandably, during the process of draining grout from the anchor head 102 into the fault 2, due to the influence of the terrain, a large amount of grout is discharged from some of the grout outlet pipes 103 on the anchor head 102, while a small amount or no grout is discharged from some of the grout outlet pipes 103 on the anchor head 102. In order to form a solidified body 4, after the grout is sent into the anchor body 101 and drained into the fault 2 for a period of time, a sealing capsule 7 is added to the grout injected into the anchor body 101. The sealing capsule 7 moves with the grout into the anchor head 102 and moves with the grout towards the grout outlet pipe 103 that is draining the grout. After moving to the position of the grout outlet pipe 103, the grout outlet pipe 103 is sealed, forcing the grout to move towards other grout outlet pipes 103.

[0051] The number of sealing capsules 7 added to the slurry should be less than the number of slurry outlet pipes 103, so as to avoid the sealing capsules 7 blocking all slurry outlet pipes 103.

[0052] Further optimize the plan, referring to Figure 1 The anchor cable assembly includes at least one prestressed anchor cable 8, one end of which is fixed to the inner wall of the tunnel 3, and the other end of which passes through the reinforcement layer 5 and is fixed to the rock mass 9.

[0053] Understandably, the number of prestressed anchor cables 8 is set according to the actual situation. The presence of prestressed anchor cables 8 can connect the rock masses 9 on both sides.

[0054] Further optimize the plan, referring to Figure 1 An acrylic epoxy resin chemical grout is injected into the reinforcement layer 5 by the grouting anchor 1 to form a water-proof layer 6. The thickness of the water-proof layer 6 is less than the thickness of the reinforcement layer 5.

[0055] Acrylic epoxy resin chemical grout can be injected into the grouting anchor 1 before or after the cement grout injection to form a water-proof layer 6 in the fault 2. At the same time, the water-proof layer 6 only needs to play a water-proof role, so the thickness of the water-proof layer 6 is less than the thickness of the reinforcement layer 5.

[0056] Before the cement grout solidifies, acrylic epoxy resin chemical grout is injected into the fault 2 through the grouting anchor 1.

[0057] Further optimize the plan, referring to Figure 4 The pipe roof assembly includes at least two advanced pipe roof layers 10, with gaps between adjacent advanced pipe roof layers 10. The front end of the adjacent lower advanced pipe roof layer 10 protrudes beyond the front end of the upper advanced pipe roof layer 10, and the front end of the advanced pipe roof layer 10 is in the tunnel excavation direction of the tunnel 3.

[0058] The advanced pipe roof layer 10 is provided in multiple layers. In this embodiment, the advanced pipe roof layer 10 is provided in four layers. The advanced pipe roof layer 10 is provided in multiple layers, that is, the advanced pipe roof layer 10 is an arc structure. The adjacent other advanced pipe roof layers 10 are provided inside or outside the advanced pipe roof layer 10. The advanced pipe roof layer 10 passes through the fault 2 and is used to support and separate the reinforcement layer 5 and the waterproof layer 6.

[0059] Meanwhile, the adjacent advanced pipe roof layers 10 overlap vertically.

[0060] A construction method for grouting reinforcement and water plugging of faults, and a support structure for grouting reinforcement and water plugging of faults, comprising the following construction steps:

[0061] S1. Construction of reinforcement layer 5: Several grouting anchors 1 are inserted into fault 2, and grout is injected into the anchors 1 to form solidified material 4 within fault 2. Inside tunnel 3, a hole is drilled into the inner wall of tunnel 3 to reach fault 2, and anchor heads 102 are inserted into fault 2. Cement grout is then injected into the anchor body 101, and the cement grout is discharged to the surrounding area through the grout outlet pipe 103 on the anchor head 102. After the cement grout solidifies, solidified material 4 is formed. Multiple solidified material 4 are formed by inserting multiple anchor heads 102 into fault 2, and the multiple solidified material 4 work together to form reinforcement layer 5.

[0062] Construction of anchor cable assembly: Install one end of the anchor cable assembly into the inner wall of tunnel 3, and fix the other end of the anchor cable assembly to the rock on the other side of fault 2 and apply prestress. Drill a hole in the inner wall of tunnel 3, passing through fault 2 and extending into the rock mass 9 on the other side of fault 2, and then install the prestressed anchor cable 8. The end of the prestressed anchor cable 8 away from tunnel 3 passes through fault 2 and is fixed to the rock mass 9 on the other side. Then apply prestress to the prestressed anchor cable 8 and fix it to the inner wall of tunnel 3 or inside the rock mass 9.

[0063] Construction of waterproof layer 6: Waterproof material is injected into the grouting anchor 1 to form waterproof layer 6 within the fault 2. The cement grout in the anchor body 101 is replaced with acrylic epoxy resin chemical grout, and the anchor head 102 injects acrylic epoxy resin chemical grout into the fault 2 to form waterproof layer 6.

[0064] Construction of pipe roof assembly: Pipe roof assembly is constructed into the inner wall of tunnel 3. The pipe roof assembly passes through fault 2 and supports reinforcement layer 5. Multi-layer advanced pipe roof layer 10 is constructed and fixed into the inner wall of tunnel 3. The multi-layer advanced pipe roof layer 10 works together to support the inner wall of tunnel 3, and at the same time separates the reinforcement layer 5 and the waterproof layer 6 in tunnel 3 from those in fault 2.

[0065] In the above process, the order of construction reinforcement layer 5, construction anchor cable assembly, construction waterproof layer 6, and construction pipe roof assembly can be determined according to the actual construction.

[0066] In a preferred embodiment of the present invention, the reinforcement layer 5 is constructed first, followed by the waterproof layer 6, then the anchor cable assembly, and finally the pipe roof assembly.

[0067] S2, Tunnel 3 Excavation: Excavate Tunnel 3 towards Fault 2 and pass through Fault 2. After the above structure is completed, excavation of Tunnel 3 can continue until it passes through Fault 2.

[0068] Further optimize the scheme. In step S1, when constructing the reinforcement layer 5, after the grouting anchor 1 injects grout into the fault 2 for a predetermined time, the sealing capsule 7 is sent into the anchor body 101.

[0069] After cement grout is fed into the anchor bolt body 101 for a period of time, sealing capsules 7 are mixed into the cement grout to seal part of the grout outlet pipe 103.

[0070] Further optimize the scheme. In step S1, when constructing the reinforcement layer 5, the solid body 4 outside the anchor head 102 is a spherical structure, and the solid body 4 and the anchor head 102 are fixed inside the fault 2.

[0071] To further optimize the scheme, in step S1, when constructing the waterproof layer 6, the cement grout in the grouting anchor rod 1 is replaced with waterproof material.

[0072] The waterproofing material is an acrylic epoxy resin chemical slurry.

[0073] Example 2

[0074] Reference Figure 5 The difference from Example 1 is that the slurry outlet pipe 103 has a frustum-shaped structure, the diameter of the slurry inlet end of the slurry outlet pipe 103 is larger than the diameter of the slurry outlet end of the slurry outlet pipe 103, the diameter of the sealing capsule 7 is smaller than the diameter of the slurry inlet end of the slurry outlet pipe 103, and the diameter of the sealing capsule 7 is larger than the diameter of the slurry outlet end of the slurry outlet pipe 103.

[0075] With this structure, when the sealing capsule 7 seals the slurry outlet pipe 103, the sealing capsule 7 is not easily discharged into the fault 2 from the slurry outlet end of the slurry outlet pipe 103, nor is it easily re-entered into the anchor head 102 from the slurry inlet end of the slurry outlet pipe 103.

[0076] Example 3

[0077] Reference Figure 6Based on Embodiment 1 or Embodiment 2, a plurality of spring plates 104 are axially fixed to the inner wall of the slurry inlet end of the slurry outlet pipe 103. The spring plates 104 are positioned at the slurry inlet of the slurry outlet pipe 103. When the slurry outlet pipe 103 discharges slurry, the spring plates 104 are squeezed and bent. The greater the squeezing force on the spring plates 104, the greater its tendency to return to its original shape. Therefore, when a large amount of slurry is discharged from a certain slurry outlet pipe 103, the slurry discharge from that pipe is restricted by the spring plates 104, resulting in an increase in the amount of slurry discharged from other slurry outlet pipes 103 that are not discharging slurry or are discharging only a small amount. The spring plates 104, used in conjunction with the sealing capsule 7, can effectively ensure that the anchor head 102 discharges slurry in different directions, achieving the formation of the solidified body 4.

[0078] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A support structure for grouting reinforcement and water plugging of faults, characterized in that: include: The grouting reinforcement component includes several grouting anchors (1), the grouting end of the grouting anchor (1) extends into the fault (2) and is located above the tunnel (3) excavation direction, the grouting end of the grouting anchor (1) is provided with multiple grout outlets around the grouting end, the grouting end of the grouting anchor (1) forms a solidified body (4), and several of the solidified bodies (4) form a reinforcement layer (5); An anchor cable assembly passes through the reinforcement layer (5) within the fault (2) and is fixed to the rock mass (9) on both sides of the fault (2); The waterproof layer (6) is injected into the reinforcement layer (5) through the grouting anchor (1); The pipe roof assembly is fixed to the inner wall of the tunnel (3) and is used to separate the tunnel (3) from the reinforcement layer (5); The grouting anchor (1) includes an anchor body (101) and an anchor head (102) fixed at one end of the anchor body (101). One end of the anchor body (101) is located on the inner wall of the tunnel (3), and the other end of the anchor body (101) and the anchor head (102) extend into the fault (2). The anchor head (102) is a hollow spherical structure, and the grout outlet is a plurality of grout outlet pipes (103) circumferentially fixed on the outer wall of the anchor head (102), and the grout outlet pipes (103) are connected to the inside of the anchor head (102); A sealing capsule (7) is provided inside the anchor body (101). The sealing capsule (7) is inserted into the anchor head (102). The diameter of the slurry inlet end of the slurry outlet pipe (103) is smaller than the diameter of the sealing capsule (7). The sealing capsule (7) is used to seal the slurry inlet end of the slurry outlet pipe (103) that discharges slurry.

2. The support structure for grouting reinforcement and water plugging of faults according to claim 1, characterized in that: The anchor cable assembly includes at least one prestressed anchor cable (8), one end of which is fixed to the inner wall of the tunnel (3), and the other end of which passes through the reinforcement layer (5) and is fixed to the rock mass (9).

3. The support structure for grouting reinforcement and water plugging of faults according to claim 1, characterized in that: The grouting anchor (1) injects acrylic epoxy resin chemical grout into the reinforcement layer (5) to form the waterproof layer (6), and the thickness of the waterproof layer (6) is less than the thickness of the reinforcement layer (5).

4. The support structure for grouting reinforcement and water plugging of faults according to claim 1, characterized in that: The pipe roof assembly includes at least two advanced pipe roof layers (10), with gaps between adjacent advanced pipe roof layers (10). The front end of the adjacent lower advanced pipe roof layer (10) protrudes beyond the front end of the upper advanced pipe roof layer (10), and the front end direction of the advanced pipe roof layer (10) is the tunneling direction of the tunnel (3).

5. A construction method for grouting reinforcement and water plugging of fault filling, used for constructing the support structure for grouting reinforcement and water plugging of fault filling as described in claim 1, characterized in that: The construction steps include: S1, Construction reinforcement layer (5): Several grouting anchors (1) are sent into the fault (2), and grout is injected into the grouting anchors (1) to form a solid (4) in the fault (2); Construction anchor cable assembly: Install one end of the anchor cable assembly into the inner wall of the tunnel (3), fix the other end of the anchor cable assembly to the rock on the other side of the fault (2) and apply prestress; Construction of waterproof layer (6): Waterproof material is injected into the grouting anchor (1) to form a waterproof layer (6) within the fault (2); Construction of pipe roof assembly: Pipe roof assembly is constructed into the inner wall of the tunnel (3). The pipe roof assembly passes through the fault (2) and supports the reinforcement layer (5). S2, Tunnel (3) excavation: excavate tunnel (3) in the direction of fault (2) and pass through fault (2).

6. The construction method for grouting reinforcement and water plugging of faults according to claim 5, characterized in that: In step S1, when constructing the reinforcement layer (5), after the grouting anchor (1) injects grout into the fault (2) for a predetermined time, a sealing capsule (7) is sent into the anchor body (101).

7. The construction method for grouting reinforcement and water plugging of faults according to claim 5, characterized in that: In step S1, when constructing the reinforcement layer (5), the solid body (4) outside the anchor head (102) is a spherical structure, and the solid body (4) and the anchor head (102) are fixed inside the fault (2).

8. The construction method for grouting reinforcement and water plugging of faults according to claim 5, characterized in that: In step S1, when constructing the waterproof layer (6), the cement grout in the grouting anchor (1) is replaced with waterproof material.

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