A variable-diameter drilling dynamic pressure gushing rapid plugging device and a use method thereof

Abstract

The application discloses a variable-diameter borehole dynamic pressure water gushing rapid sealing device and a use method, relates to the underground hot water resource exploitation technical field, and a fixed support is fixedly arranged on the lower part of the outer wall of a sleeve pipe, the fixed support is used for abutting against the step of a borehole and separating the borehole into two parts along the axial direction, a water stop plate is used for being arranged on the upper part of the outer sleeve pipe and being in contact with the ground, each grouting pipe penetrates through the water stop plate and extends into the borehole, and the positions of the plurality of grouting pipes in the borehole are different from each other; the bottom end of an orifice pipe is connected with the top end of the sleeve pipe, one side of the orifice pipe is provided with a side pipe, a second valve is arranged on the side pipe, a mixing pipe is connected with the side of the side pipe away from the orifice pipe, a top cover is arranged on the top of the orifice pipe, a central pipe extends into the sleeve pipe through the top cover, a water guide pipe is arranged on one side of the upper part of the central pipe, and a first valve is arranged on the water guide pipe. The device and the use method are simple in structure, convenient to operate, and can rapidly and effectively realize the sealing of the variable-diameter borehole under the condition of dynamic pressure water gushing.

Description

Technical Field

[0001] The present invention relates to the technical field of underground hot water resource exploitation, and in particular to a device for quickly plugging dynamic pressure water gushing from a variable-diameter borehole and a method for using the device. Background Art

[0002] As a renewable, clean energy source, groundwater has significant market potential and broad prospects for development and application due to its wide distribution, large storage capacity, and ease of development. With the acceleration of my country's economic development and the increasing demand for mineral resources, the development and utilization of groundwater resources is gradually moving towards large-scale and industrialized development. Furthermore, continuously improving exploration technologies are facilitating the safe and efficient exploitation of groundwater resources.

[0003] During the process of drilling underground hot water resources, increasing the depth of the exploration hole often leads to the interconnection of multiple aquifers with high water pressure and high water content. This not only causes water gushing from the borehole, triggering geological disasters, but also reduces the utilization rate of underground hot water resources. Therefore, these boreholes are often sealed due to the difficulty of operation.

[0004] Water gushing from boreholes is typically sealed by lowering waterstops. However, this method is only suitable for boreholes with low water pressure and small water volumes. For aquifers with high water volume and high water pressure, the waterstops often struggle to be lowered into position, making the borehole sealing impossible. Regarding variable-diameter boreholes, which typically have at least two sections with different diameters, the diameters decrease from top to bottom, forming a step between adjacent sections. The existing technology is particularly lacking in suitable sealing devices for variable-diameter boreholes. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a variable diameter borehole dynamic pressure water gushing rapid sealing device and a method of use, which has a simple structure and is easy to operate, and can quickly and effectively achieve the sealing of variable diameter boreholes under dynamic pressure water gushing conditions.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a device for quickly plugging dynamic pressure water gushing from a variable-diameter borehole, comprising a casing, a fixed support, an orifice assembly, a central pipe, a water guide pipe, a pressure measuring component, a first valve, a water stop plate and a plurality of grouting pipes, wherein the fixed support is fixedly sleeved on the lower part of the outer wall of the casing, the fixed support is used to abut against the step of the borehole and separate the borehole into two parts along the axial direction, the water stop plate is used to sleeve on the upper part of the outer side of the casing and contact the ground, each of the grouting pipes passes through the water stop plate and extends into the borehole, and the positions of the plurality of grouting pipes extending into the borehole are not mutually opposite. The orifice assembly includes an orifice tube, a side tube, a second valve, a mixing tube and a top cover. The bottom end of the orifice tube is connected to the top end of the sleeve. The side tube is provided on one side of the orifice tube. The second valve is provided on the side tube. The mixing tube is connected to the side of the side tube away from the orifice tube. The top cover is provided on the top of the orifice tube. The center tube passes through the top cover and extends into the sleeve. The pressure measuring component is provided on the top of the center tube. The water guide pipe is provided on one side of the upper part of the center tube. The first valve is provided on the water guide pipe.

[0008] Preferably, the fixed support includes a slip, which is fixedly sleeved on the lower part of the outer wall of the casing. The slip includes a hollow cylinder and a hollow inverted cone connected in sequence from top to bottom, and the hollow inverted cone is used to offset the step of the drill hole.

[0009] Preferably, the fixed support also includes a pressure ring, an annular rubber pad and a plurality of connecting bolts, the pressure ring and the annular rubber pad are both sleeved on the outside of the sleeve, and the annular rubber pad is located between the hollow cylinder and the pressure ring, the annular rubber pad is against the inner wall of the drilled hole, and each of the connecting bolts passes through the pressure ring and the annular rubber pad in sequence and is installed on the top of the hollow cylinder.

[0010] Preferably, a limit plate is provided on the upper fixed sleeve of the outer wall of the grouting pipe, and the limit plate is used to contact the upper surface of the water stop plate to limit the axial position of the grouting pipe.

[0011] Preferably, it further comprises a concrete pier, which is arranged on the upper part of the water stop plate.

[0012] Preferably, the mixing pipe comprises a main pipe, a first branch pipe and a second branch pipe, one end of the main pipe is connected to a side of the side pipe away from the orifice pipe, and the other end of the main pipe is connected to the first branch pipe and the second branch pipe.

[0013] Preferably, the orifice assembly further comprises a side cover, wherein the side cover is arranged on a side of the side tube away from the orifice tube, and one end of the main tube passes through the side cover and extends into the side tube.

[0014] Preferably, a flow meter is provided on the water conduit, and the flow meter is provided between the central pipe and the first valve.

[0015] Preferably, a water hole is provided on the side wall of the sleeve located at the lower part of the fixed support.

[0016] The present invention also provides a method for using a variable diameter drill hole dynamic pressure water gushing rapid plugging device, comprising the following steps:

[0017] Step 1: Place the casing into the drilled hole, limit the axial direction of the casing by abutting the fixed support against the step of the drilled hole, sleeve a water stop plate on the outside of the casing, extend multiple grouting pipes through the water stop plate into the drilled hole, install the orifice pipe on the top of the casing, and extend the center pipe through the top cover into the casing;

[0018] Step 2: performing annular gap grouting, wherein the annular gap grouting is performed sequentially through a plurality of grouting pipes from deep to shallow according to the depth of the grouting pipes inserted into the borehole;

[0019] Step 3: After the annular gap grouting is completed, the first valve and the second valve are closed to hold the pressure until the reading of the pressure measuring component is stable, and then the holding pressure is ended;

[0020] Step 4: Open the first valve and the second valve, and perform grouting inside the casing through the mixing pipe using a quick-setting water-blocking material. The grouting is completed when grouting occurs in the water pipe.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The invention relates to a device and method for rapidly plugging dynamic pressure water inrush in a variable diameter borehole. A casing is inserted into the borehole, and the axial direction of the casing is limited by a fixed support against a step of the borehole. Simultaneously, a plurality of grouting pipes are provided between the casing and the inner wall of the borehole, and a quick-setting water-blocking material is injected from top to bottom into the annular gap between the casing and the inner wall of the borehole, thereby achieving the purpose of plugging the annular gap and shallow cracks in the stratum. The upper end of the casing is connected to an orifice device, and the quick-setting water-blocking material is injected into the casing by pressure grouting through a mixing pipe, thereby achieving the purpose of plugging water in the borehole. A central pipe is provided inside the casing, and a pressure measuring component is connected to the upper end of the central pipe to measure the water pressure deep in the borehole. When grouting is performed inside the casing through the mixing pipe, the central pipe and the water guide pipe are used to guide water and relieve pressure. The invention has a simple structure, is easy to operate, is economical and practical, safe and reliable, and can quickly and effectively achieve plugging of variable diameter boreholes under dynamic pressure water inrush conditions. It can effectively solve the problem of plugging variable diameter boreholes in broken strata in the upper hole section and in drilling into multiple layers of pressurized aquifers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of the device for rapidly plugging dynamic pressure water inrush from a variable-diameter borehole provided by the present invention;

[0025] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0026] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0027] Figure 4 This is a schematic structural diagram of a fixed support in the variable diameter drilling dynamic pressure water inrush rapid plugging device provided by the present invention;

[0028] Figure 5 for Figure 4 Cross-sectional view along CC direction.

[0029] Explanation of the accompanying reference numerals: 100, device for quickly plugging dynamic pressure water gushing from variable-diameter drilling; 1, casing; 2, center pipe; 3, water guide pipe; 4, pressure measuring component; 5, first valve; 6, fixed support; 61, hollow cylinder; 62, hollow inverted cone; 63, annular rubber pad; 64, pressure ring; 65, connecting bolt; 7, water stop plate; 8, grouting pipe; 9, concrete pier; 10, orifice pipe; 11, side pipe; 12, second valve; 13, top cover; 14, side cover; 15, mixing pipe; 16, flow meter; 17, water hole; 18, limit plate; 200, drilling hole; 201, drilling section; 202, step. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a variable diameter borehole dynamic pressure water gushing rapid sealing device and a use method, which has a simple structure and is easy to operate, and can quickly and effectively achieve the sealing of variable diameter boreholes under dynamic pressure water gushing conditions.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-5 As shown, this embodiment provides a variable diameter borehole dynamic pressure water gushing rapid sealing device 100, including a casing 1, a fixed support 6, an orifice assembly, a central pipe 2, a water guide pipe 3, a pressure measuring component 4, a first valve 5, a water stop plate 7 and a plurality of grouting pipes 8, the fixed support 6 is fixedly sleeved on the lower part of the outer wall of the casing 1, the fixed support 6 is used to abut against the step 202 of the borehole 200 and separate the borehole 200 into two parts along the axial direction, so that the annular gap formed between the part of the borehole 200 located above the fixed support 6 and the casing 1 is not connected to the part of the borehole 200 located below the fixed support 6, the water stop plate 7 is used to be sleeved on the upper part outside the casing 1 and in contact with the ground, the inner wall of the center hole of the water stop plate 7 is in contact with the outer wall of the casing 1, so that the water stop plate 7 plays a certain guiding role on the casing 1, which is beneficial for the casing 1 to maintain a vertical state, and each grouting pipe 8 passes through the water stop plate 7 It extends into the borehole 200, and the positions at which the multiple grouting pipes 8 extend into the borehole 200 are different, that is, the depths of the grouting pipes 8 extending into the borehole 200 are different; the orifice assembly includes an orifice pipe 10, a side pipe 11, a second valve 12, a mixing pipe 15 and a top cover 13, the bottom end of the orifice pipe 10 is connected to the top end of the casing 1, a side pipe 11 is provided on one side of the orifice pipe 10, the second valve 12 is provided on the side pipe 11, the mixing pipe 15 is connected to the side of the side pipe 11 away from the orifice pipe 10, the top cover 13 is provided on the top of the orifice pipe 10, the center pipe 2 passes through the top cover 13 and extends into the casing 1, specifically, the depth of the center pipe 2 extending into the borehole 200 is greater than the depth of the casing 1 extending into the borehole 200; a pressure measuring component 4 is provided on the top of the center pipe 2 for measuring the water pressure deep in the borehole 200, a water guide pipe 3 is provided on one side of the upper part of the center pipe 2, and the first valve 5 is provided on the water guide pipe 3.

[0034] like Figures 3-5 As shown, the fixed support 6 includes a slip, which is fixedly mounted on the lower portion of the outer wall of the casing 1. The slip includes a hollow cylinder 61 and a hollow inverted cone 62 connected in sequence from top to bottom. The hollow inverted cone 62 is used to abut against the step 202 of the borehole 200. The hollow inverted cone 62 contacts the corner of the step 202 of the borehole 200 to separate the borehole 200. Specifically, the slip is welded to the outer wall of the casing 1, and the outer diameter of the hollow cylinder 61 is the same as the outer diameter of the top of the hollow inverted cone 62.

[0035] The fixed support 6 also includes a pressure ring 64, an annular rubber pad 63 and a plurality of connecting bolts 65. The pressure ring 64 and the annular rubber pad 63 are both sleeved on the outside of the casing 1, and the annular rubber pad 63 is located between the hollow cylinder 61 and the pressure ring 64. The annular rubber pad 63 is against the inner wall of the borehole 200. The annular rubber pad 63 improves the separation effect of the fixed support 6 on the borehole 200, and improves the sealing of the annular gap formed between the part of the borehole 200 located above the fixed support 6 and the casing 1. Each connecting bolt 65 passes through the pressure ring 64 and the annular rubber pad 63 in sequence and is installed on the top of the hollow cylinder 61. The connecting bolts 65 in this embodiment are all-thread bolts.

[0036] like Figure 2 As shown, a limit plate 18 is fixedly sleeved on the upper portion of the outer wall of the grouting pipe 8. The limit plate 18 is used to contact the upper surface of the water stop plate 7 to limit the axial position of the grouting pipe 8. Specifically, the water stop plate 7 is provided with a plurality of mounting holes for the grouting pipe 8 to pass through. During the process of lowering the grouting pipe 8 through the mounting holes, the grouting pipe 8 stops moving downward after the limit plate 18 contacts the water stop plate 7, thereby completing the placement of the grouting pipe 8. The provision of the limit plate 18 facilitates the control of the depth to which the grouting pipe 8 extends into the borehole 200.

[0037] This embodiment also includes a concrete pier 9, which is arranged on the upper part of the water stop plate 7. After the water stop plate 7 is used to initially stop the water at the hole and the grouting pipe 8 is installed, cement concrete is used to build the concrete pier 9 above the water stop plate 7 and around the casing 1 for temporary sealing. The concrete pier 9 can further strengthen the firmness of the entire device.

[0038] Mixing pipe 15 includes a main pipe, a first branch pipe, and a second branch pipe. One end of the main pipe is connected to the side of side pipe 11 away from orifice pipe 10, and the other end of the main pipe is connected to the first branch pipe and the second branch pipe. The slurry used for grouting is usually cement-water glass slurry. The first branch pipe and the second branch pipe transport cement and water glass respectively, forming a cement-water glass slurry at the interface, which can better control the slurry setting time.

[0039] The orifice assembly further includes a side cover 14, which is disposed on a side of the side pipe 11 away from the orifice pipe 10, and one end of the main pipe extends through the side cover 14 into the side pipe 11. Specifically, one end of the main pipe is fixedly sleeved on the center of the side cover 14.

[0040] The top cover 13 in this embodiment is a flange, the center pipe 2 is fixedly sleeved on the middle part of the flange, and the flange is used to be fixed to the top of the orifice pipe 10 by bolts.

[0041] In this embodiment, the casing 1 is composed of segmented casings connected by welding or male and female threads, and the orifice pipe 10 is connected to the top end of the casing 1 by welding or male and female threads.

[0042] The water pipe 3 is provided with a flow meter 16 , which is provided between the central pipe 2 and the first valve 5 , and is used to count the water inflow during the grouting process.

[0043] A water hole 17 is provided on the side wall of the casing 1 located below the fixed support 6 to reduce the disturbance of groundwater runoff to the casing 1 .

[0044] In this embodiment, one end of the casing 1 is inserted 1 to 2 meters below the step 202, and the other end is positioned 0.3 to 0.5 meters above the hole opening. The difference between the outer diameter of the casing 1 and the inner diameter of the drilling section 201 below the step 202 is 30 to 40 mm. It should be noted that the step 202 referred to here refers to the step 202 that abuts against the fixed support 6.

[0045] In this specific embodiment, the borehole 200 is divided into four borehole sections 201 with successively decreasing inner diameters from top to bottom, thereby forming three steps 202 arranged sequentially from top to bottom. The fixed support 6 in this embodiment is offset against the middle step 202 among the three steps, that is, there are two borehole sections 201 above the fixed support 6, and three grouting pipes 8 are respectively extended into the above two borehole sections 201, and the three grouting pipes 8 are respectively lowered to the upper, middle and lower positions of each borehole section 201.

[0046] In this specific embodiment, the pressure measuring component 4 is a pressure gauge, the first valve 5 is a first ball valve, and the second valve 12 is a second ball valve.

[0047] This embodiment also provides a method for using the variable diameter drilling dynamic pressure water inrush rapid plugging device 100, comprising the following steps:

[0048] Step 1: Place the casing 1 into the borehole 200, limit the axial direction of the casing 1 by fixing the support 6 against the step 202 of the borehole 200, sleeve the water stop plate 7 on the outside of the casing 1, pass multiple grouting pipes 8 through the water stop plate 7 and extend into the borehole 200, install the orifice pipe 10 on the top of the casing 1, and extend the center pipe 2 through the top cover 13 into the casing 1; after installation, the water in the borehole 200 is discharged from the water pipe 3 through the center pipe 2, and the discharged water can be used for the preparation of grouting liquid, that is, the water pipe 3 serves to facilitate the use of water for on-site construction.

[0049] Step 2: Perform annular gap grouting. According to the depth of the grouting pipe 8 inserted into the borehole 200, perform annular gap grouting through multiple grouting pipes 8 in sequence from deep to shallow. The grouting of each grouting pipe 8 is terminated when the next grouting pipe 8 of the adjacent depth appears to be grouting. Here, the next grouting pipe of the adjacent depth refers to another grouting pipe 8 that is closest to the depth value of the grouting pipe 8.

[0050] Specifically, in this embodiment, six grouting pipes 8 are provided, and the six grouting pipes 8 are the first grouting pipe, the second grouting pipe, the third grouting pipe, the fourth grouting pipe, the fifth grouting pipe and the sixth grouting pipe, whose depths of insertion into the borehole 200 become shallower in sequence. Grouting is first performed through the first grouting pipe, and the occurrence of grouting back in the second grouting pipe is used as the grouting end standard for the first grouting pipe. Then, grouting is performed through the second grouting pipe, and the occurrence of grouting back in the third grouting pipe is used as the grouting end standard for the second grouting pipe. And so on, grouting is continued through the third grouting pipe, the fourth grouting pipe, the fifth grouting pipe and the sixth grouting pipe in sequence.

[0051] Step 3: After the annular gap grouting is completed, close the first valve 5 and the second valve 12 to hold the pressure until the reading of the pressure measuring component 4 is stable, and then the pressure holding is ended.

[0052] Step 4: Open the first valve 5 and the second valve 12, and use the quick-setting water-blocking material to grout the interior of the casing 1 through the mixing pipe 15. The grouting is completed when the water pipe 3 shows grouting back.

[0053] This embodiment adopts a segmentation and pressure relief approach, using casing 1 and fixed support 6 to divide the borehole 200 into inner and outer sections. Grouting is first performed through the grouting pipe 8 using a grouting pump into the annular gap between the casing 1 and the borehole 200 to seal the annular gap and shallow cracks in the borehole 200. Grouting is then performed inside the casing 1 through the mixing pipe 15 to seal the borehole 200. This embodiment has a simple structure, easy operation, is economical and practical, safe and reliable, and can quickly and effectively seal variable-diameter boreholes under dynamic pressure water gushing conditions. It can effectively solve the problem of sealing variable-diameter boreholes in broken strata in the upper hole section or when drilling into multiple layers of confined aquifers.

[0054] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A device for quickly plugging dynamic pressure water inrush in variable diameter drilling holes, characterized in that: It includes a casing, a fixed support, an orifice assembly, a central pipe, a water guide pipe, a pressure measuring component, a first valve, a water stop plate and a plurality of grouting pipes, the fixed support is fixedly sleeved on the lower part of the outer wall of the casing, the fixed support is used to abut against the step of the borehole and separate the borehole into two parts along the axial direction, the water stop plate is used to sleeve on the upper part outside the casing and contact with the ground, each of the grouting pipes passes through the water stop plate and extends into the borehole, and the positions of the plurality of grouting pipes extending into the borehole are different; the orifice assembly includes an orifice pipe, a side pipe, a second valve, a mixing pipe and a top cover, the bottom end of the orifice pipe is connected to the top end of the casing, the orifice pipe The side pipe is provided on one side, the second valve is provided on the side pipe, the mixing pipe is connected to the side of the side pipe away from the orifice pipe, the top cover is provided on the top of the orifice pipe, the center pipe passes through the top cover and extends into the sleeve, the top of the center pipe is provided with the pressure measuring component, the water guide pipe is provided on one side of the upper part of the center pipe, and the first valve is provided on the water guide pipe; the upper fixed sleeve of the outer wall of the grouting pipe is provided with a limit plate, and the limit plate is used to contact with the upper surface of the water stop plate to limit the axial position of the grouting pipe; it also includes a concrete pier, which is provided on the upper part of the water stop plate.

2. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 1, characterized in that: The fixed support includes a slip, which is fixedly sleeved on the lower part of the outer wall of the casing. The slip includes a hollow cylinder and a hollow inverted cone connected in sequence from top to bottom. The hollow inverted cone is used to offset the step of the drill hole.

3. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 2, characterized in that: The fixed support also includes a pressure ring, an annular rubber pad and a plurality of connecting bolts. The pressure ring and the annular rubber pad are both sleeved on the outside of the sleeve, and the annular rubber pad is located between the hollow cylinder and the pressure ring. The annular rubber pad is against the inner wall of the drilled hole. Each of the connecting bolts passes through the pressure ring and the annular rubber pad in sequence and is installed on the top of the hollow cylinder.

4. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 1, characterized in that: The mixing pipe includes a main pipe, a first branch pipe and a second branch pipe. One end of the main pipe is connected to a side of the side pipe away from the orifice pipe, and the other end of the main pipe is connected to the first branch pipe and the second branch pipe.

5. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 4, characterized in that: The orifice assembly further includes a side cover, which is arranged on a side of the side pipe away from the orifice pipe, and one end of the main pipe passes through the side cover and extends into the side pipe.

6. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 1, characterized in that: The water conduit is provided with a flow meter, and the flow meter is arranged between the central pipe and the first valve.

7. The device for rapidly plugging dynamic pressure water inrush in variable diameter drilling according to claim 1, characterized in that: The sleeve is provided with a water hole on the side wall of the lower part of the fixed support.

8. A method for using the variable diameter drilling dynamic pressure water gushing rapid plugging device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Place the casing into the drilled hole, limit the axial direction of the casing by abutting the fixed support against the step of the drilled hole, sleeve a water stop plate on the outside of the casing, extend multiple grouting pipes through the water stop plate into the drilled hole, install the orifice pipe on the top of the casing, and extend the center pipe through the top cover into the casing; Step 2: performing annular gap grouting, wherein the annular gap grouting is performed sequentially through a plurality of grouting pipes from deep to shallow according to the depth of the grouting pipes inserted into the borehole; Step 3: After the annular gap grouting is completed, the first valve and the second valve are closed to hold the pressure until the reading of the pressure measuring component is stable, and then the holding pressure is ended; Step 4: Open the first valve and the second valve, and perform grouting inside the casing through the mixing pipe using a quick-setting water-blocking material. The grouting is completed when grouting occurs in the water pipe.

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