An emergency double-slurry plugging device and dynamic water plugging method

Abstract

The present invention belongs to the field of water burst control and specifically provides an emergency dual-slurry plugging device and a dynamic water plugging method. The device comprises a hollow anchor rod having a plurality of grouting holes formed in the wall of the hollow anchor rod. The tail end of the hollow anchor rod is connected to a first elastic capsule, the tail end of the first elastic capsule is provided with a capsule tip connected thereto, and the capsule tip is used to connect to a plugging slurry grouting pipeline. A second elastic capsule is provided within the first elastic capsule, and a capsule tail pipe is provided at the tail end of the second elastic capsule, which is connected thereto. The first elastic capsule has a through hole for the capsule tail pipe to pass through, and the capsule tail pipe is used to connect to a water glass grouting pipeline. The front end of the second elastic capsule is connected to a grouting pipe, which is arranged along the outer side of the hollow anchor rod and extends outside the first elastic capsule. The front end of the grouting pipe is closed and has a plurality of small holes in the wall. The device and method inject dual slurries to quickly form a block for plugging water, thereby achieving targeted plugging of leaks at the water burst point.

Description

Technical Field

[0001] The present invention belongs to the field of water inrush treatment, and in particular relates to an emergency double-slurry plugging device and a dynamic water plugging method. Background Art

[0002] During the construction and use of underground projects, such as subway construction and tunnel construction, there are serious risks of geological disasters such as sudden water and mud bursts. Most tunnel water and mud bursts occur in karst-developed areas, but some also occur in water-rich fault zones. During the excavation of underground projects, due to the release of excavation stress, groundwater in the aquifer, under the action of head pressure, overcomes the resistance of impermeable layers, faults, and fissures, wraps mud and sand, and suddenly rushes into the tunnel. This phenomenon is called sudden water and mud burst. The water discharge at the water burst point is large and rapid, making it impossible to block the water at a specific point or area. Current equipment is relatively troublesome in blocking sudden water and mud bursts. However, when a sudden water and mud burst disaster occurs, it is easy to cause equipment loss, threaten personnel safety, and delay the construction schedule.

[0003] To this end, the present invention provides an emergency double-slurry plugging device and a dynamic water plugging method, which can quickly inject magnetic slurry into the water inrush hole to seal it, thereby blocking water at the source and avoiding subsequent accidents. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an emergency double-slurry plugging device and a dynamic water plugging method, which can plug water by injecting slurry to form a block, thereby achieving fixed-point plugging of water inrush points.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an emergency double-slurry plugging device, including a hollow anchor rod, the hollow anchor rod tube wall is provided with a plurality of grouting holes, the tail end of the hollow anchor rod is connected to the first elastic capsule, the tail of the first elastic capsule is provided with a capsule tip connected to it, the capsule tip is used to connect to the plugging slurry grouting pipeline, a second elastic capsule is provided in the first elastic capsule, the tail end of the second elastic capsule is provided with a capsule tail pipe connected to it, the first elastic capsule is provided with a through hole for the capsule tail pipe to pass through, the capsule tail pipe is used to connect to the water glass grouting pipeline, the front end of the second elastic capsule is connected to the grouting pipe, the grouting pipe is arranged along the outside of the hollow anchor rod and extends out of the outside of the first elastic capsule, the front end of the grouting pipe is closed, and the pipe wall is provided with a plurality of small holes.

[0006] In a preferred solution, the front end of the hollow anchor rod is covered with a water-swelling layer.

[0007] In a preferred embodiment, the water-swellable layer is a water-swellable material.

[0008] In a preferred solution, a plurality of magnetic rings are sheathed on the outer side of the hollow anchor rod and the grouting pipe as a whole and are arranged along the length direction of the hollow anchor rod.

[0009] In a preferred solution, the front end of the first elastic capsule is provided with a plurality of capsule holes.

[0010] In a preferred solution, the grouting pipe is made of a bendable material, and a plurality of bends are provided along the length direction of the grouting pipe to form a curved pipe.

[0011] In a preferred solution, a groove adapted to the grouting pipe is provided on the outside of the hollow anchor rod, and the grouting pipe is nested in the groove on the outside of the hollow anchor rod.

[0012] The present invention also provides a dynamic water plugging method, which uses the above-mentioned emergency double-slurry plugging device for plugging, comprising the following steps:

[0013] S1. Advance prediction: Ascertain the geological conditions, including groundwater development, rock mass structure type, water content in surrounding rocks, or the location and size of caves and cavities;

[0014] S2. Determine the type of sudden water inrush: determine the sudden water head and the size of the sudden water inrush hole;

[0015] S3, preparing slurry: preparing the plugging slurry to be injected into the first elastic capsule;

[0016] S4. Equipment installation: The tip of the first elastic capsule is connected to the plugging slurry grouting pipeline, and the tail pipe of the second elastic capsule is connected to the water glass grouting pipeline. With the help of external equipment, the emergency double-slurry plugging device is pushed into the water burst tunnel as a whole. Under the pressure of the water flow, the first elastic capsule is compressed at the rear end of the hollow anchor rod;

[0017] S5, double-liquid grouting and plugging: The plugging slurry prepared in step S3 is injected into the first elastic capsule through the plugging slurry grouting pipeline through the grouting equipment. The plugging slurry props up the first elastic capsule to form a large-volume plugging block, and the plugging slurry is gathered around the hollow anchor through the grouting holes in the hollow anchor pipe wall; water glass is pumped through the water glass grouting pipeline through the second elastic capsule and into the water burst hole, where it reacts with the plugging slurry to plug the water burst hole. After the water glass grouting is completed, the capsule tail pipe is disconnected from the water glass grouting pipeline and the capsule tail pipe is pushed into the first elastic capsule;

[0018] S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

[0019] In a preferred embodiment, in step S3, the plugging slurry includes cement slurry, magnetic particles, epoxy resin emulsion and its curing agent, the water-cement ratio of the cement slurry is 0.8:1 to 1:1; the amount of magnetic particles is 20% to 40% of the mass of the cement slurry, the uniformity coefficient Cu>5, and the curvature coefficient Cc×2=1 to 3; the amount of epoxy resin emulsion and its curing agent is 5% to 11% of the mass of the cement slurry.

[0020] In a preferred solution, in step S3, the water glass modulus is 2.8 and the concentration is 35°Bé.

[0021] The present invention provides an emergency double-slurry plugging device and a dynamic water plugging method, which have the following beneficial effects:

[0022] 1. First, inject plugging slurry into the water burst tunnel, using the hollow anchor rod as the injection channel. The plugging slurry can be enriched in the hollow anchor rod. At the same time, due to the installation of the magnetic ring, the plugging slurry can be adsorbed in layers to prevent loss, thus resisting the dynamic water. The plugging slurry material is injected in small amounts, and the pressure is reduced in stages to form a large block for water blocking, avoiding the difficulty of overcoming water scouring and plugging under high water head. Water glass is injected through the second elastic capsule, which causes the plugging slurry to solidify rapidly, showing broad application prospects in emergency projects such as water bursts. For underground engineering excavation and underground pipeline surges, the discharge water volume is large and rapid, and it is impossible to block the water at a specific point and area. By using this device, the source of the water is cut off, avoiding the damage caused by subsequent accidents to the project and urban space.

[0023] 2. By setting up hollow anchor rods and grouting pipes, the plugging slurry and water glass can be injected separately. The plugging slurry and water glass react quickly to achieve rapid plugging.

[0024] 3. By setting up a water-expanding layer, the device is extended into the water-inrush tunnel as the first-level water blocking measure. When it comes into contact with water, its volume expands and the hole wall is squeezed to enhance the anchoring performance.

[0025] 4. The grouting pipe can be bent along the axial direction and set as a curved pipe with multiple bends to increase the coverage of the water glass. At the same time, it enhances the device's resistance to pull-out and dynamic water erosion.

[0026] 5. The plugging slurry is retained in the first elastic capsule. After the water glass is injected, the capsule tail pipe is pushed into the first elastic capsule to make the water glass react with the plugging slurry in the first elastic capsule, and the hardness increases rapidly to form an end plugging block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 This is a schematic structural diagram of the emergency double-slurry plugging device involved in the present invention;

[0029] Figure 2 for Figure 1 Sectional view along plane AA;

[0030] Figure 3 This is a schematic diagram of the structure of the device of the present invention after grouting;

[0031] Figure 4 This is a structural diagram after the capsule tail tube is pushed into the first elastic capsule;

[0032] Figure 5 This is a schematic diagram of the tunnel water inrush blocking method involved in the present invention;

[0033] In the figure: hollow anchor rod 1, grouting hole 101, groove 102, first elastic capsule 2, capsule tip 201, capsule hole 202, second elastic capsule 3, capsule tail tube 301, grouting tube 4, small hole 401, water expansion layer 5, magnetic ring 6. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Example 1:

[0036] like Figures 1 and 2 As shown, an emergency double-slurry plugging device includes a hollow anchor rod 1. The wall of the hollow anchor rod 1 is provided with a plurality of grouting holes 101. The hollow anchor rod 1 is used as a grouting channel while providing an anchoring foundation. The tail end of the hollow anchor rod 1 is connected to the first elastic capsule 2. The tail of the first elastic capsule 2 is provided with a capsule tip 201 connected thereto. The capsule tip 201 is used to connect to the plugging slurry grouting pipeline. The first elastic capsule 2 is used to retain the plugging slurry and prevent it from being washed away by water. The plugging slurry material is injected gradually, the pressure is reduced in stages, and a large block is formed to perform water plugging, thereby avoiding the difficulty of overcoming water scouring and plugging under high water head.

[0037] A second elastic capsule 3 is provided in the first elastic capsule 2 for storing water glass. A capsule tail tube 301 is provided at the tail end of the second elastic capsule 3 in communication with the capsule tail tube 3. The first elastic capsule 2 is provided with a through hole for the capsule tail tube 301 to pass through. The capsule tail tube 301 is arranged close to the inner wall of the through hole. The capsule tail tube 301 is used to connect with the water glass grouting pipe. The capsule tail tube 301 can be made of metal, which is convenient for pushing it into the first elastic capsule 2 after the pouring is completed, so that the water glass reacts with the plugging slurry in the first elastic capsule 2, and the hardness increases rapidly to form an end plugging block, such as Figure 4 The first elastic capsule 2, the capsule tip 201 and the second elastic capsule 3 are all made of rubber.

[0038] The front end of the second elastic capsule 3 is connected to the grouting pipe 4. Multiple grouting pipes 4 can be set up and distributed at equal intervals along the outer periphery of the hollow anchor rod 1. The grouting pipe 4 is set along the outer side of the hollow anchor rod 1 and extends out of the outside of the first elastic capsule 2. The front end of the grouting pipe 4 is closed, and a number of small holes 401 are provided in the pipe wall. Water glass can be ejected from the small holes 401 and enter the plugging slurry material, solidify instantly, and enhance the material's anti-shearing ability.

[0039] Preferably, Figure 2 As shown, a groove 102 adapted to the grouting pipe 4 is provided on the outer side of the hollow anchor rod 1 to facilitate the positioning and installation of the grouting pipe 4 .

[0040] The hollow anchor rod 1 and the grouting pipe 4 are provided with a plurality of magnetic rings 6 on the outside thereof, which are arranged at regular intervals along the length direction of the hollow anchor rod 1. The magnetic rings 6 are provided to guide the plugging slurry containing magnetic material so that the plugging slurry is gathered around the hollow anchor rod 1.

[0041] Preferably, a plurality of capsule holes 202 are provided at the front end of the first elastic capsule 2, so as to facilitate the injection of the plugging slurry into the water inrush hole through the capsule holes 202.

[0042] The grouting pipe 4 is made of memory alloy. When used, the grouting pipe 4 is set to a curved pipe with multiple bends to increase the coverage of the water glass and, at the same time, enhance the anti-pullout and anti-dynamic water scouring performance of the anchor rod.

[0043] Preferably, the front end of the hollow anchor rod 1 is coated with a water-swelling layer 5. Specifically, in this embodiment, the water-swelling layer 5 is made of a water-swelling material, such as water-swelling rubber or water-swelling resin. The water-swelling layer 5 extends into the water-inrush tunnel as a primary water-blocking measure. Upon contact with water, it expands in volume, compressing the hole wall and enhancing anchoring performance.

[0044] In this embodiment, the plugging slurry injected into the first elastic capsule 2 includes cement slurry, magnetic particles, epoxy resin emulsion and its curing agent, and the water-cement ratio of the cement slurry is 0.8:1 to 1:1; in this embodiment, the water-cement ratio is 1:1; the amount of magnetic particles is 20% to 40% of the mass of the cement slurry, and 40% is selected in this embodiment, the uniformity coefficient Cu>5, and the curvature coefficient Cc×2=1~3; the amount of epoxy resin emulsion and its curing agent is 5% to 11% of the mass of the cement slurry, and the mass ratio of epoxy resin emulsion and its curing agent is 5:6.

[0045] The water glass injected into the second elastic capsule 3 has a modulus of 2.8 and a concentration of 35° Bé.

[0046] The device first injects the plugging slurry into the water burst tunnel, and uses the hollow anchor rod 1 as the injection channel. The plugging slurry can be enriched in the hollow anchor rod 1. At the same time, due to the provision of a magnetic ring, the plugging slurry can be layered and adsorbed without loss, thus resisting the flow of water. Then, water glass is injected through the second elastic capsule 3, and the water glass causes the plugging slurry to solidify rapidly. Figure 5 As shown, the device has broad application prospects in emergency projects such as water inrush. For water inrush during underground excavation and sudden surges in underground pipelines, where the amount of water released is large and rapid and it is impossible to block the water at a specific point or area, the device can be used to cut off the source, preventing subsequent damage to the project and urban space.

[0047] Example 2:

[0048] The present invention also provides a dynamic water blocking method, comprising the following steps:

[0049] S1. Advance prediction: Ascertain the geological conditions, including groundwater development, rock mass structure type, surrounding rock water content, or the location and size of caves and karst caves.

[0050] S2. Determine the type of sudden water surge: determine the sudden water head and the size of the sudden water opening.

[0051] S3. Prepare slurry: Prepare the plugging slurry to be injected into the first elastic capsule 2. The plugging slurry includes cement slurry, magnetic particles, and epoxy resin base liquid. The water-cement ratio of the cement slurry is 0.8:1 to 1:1, the content of magnetic particles is 20% to 40%, Cu>5, and 2Cc=1-3.

[0052] S4. Equipment installation: The capsule tip 201 of the first elastic capsule 2 is connected to the plugging slurry grouting pipeline, and the capsule tail pipe 301 of the second elastic capsule 3 is connected to the water glass grouting pipeline. With the help of external equipment, the emergency double-slurry plugging device is pushed into the water burst cave as a whole. Under the pressure of water flow, the first elastic capsule 2 is compressed at the rear end of the hollow anchor rod 1.

[0053] S5. Double liquid grouting plugging: Figure 3 As shown, the plugging slurry prepared in step S3 is injected into the first elastic capsule 2 from the plugging slurry grouting pipe through the grouting equipment. The plugging slurry props up the first elastic capsule 2 to form a large-volume plugging block, and the plugging slurry is gathered around the hollow anchor rod 1 through the grouting hole 101 on the wall of the hollow anchor rod 1; the water glass is pumped through the second elastic capsule 3 through the water glass grouting pipe and enters the water burst hole, where it reacts with the plugging slurry to seal the water burst hole. The water glass modulus is 2.8 and the concentration is 35°Bé.

[0054] like Figure 4 As shown, after the water glass grouting is completed, the connection between the capsule tail pipe 301 and the water glass grouting pipeline is disconnected, and the capsule tail pipe 301 is pushed into the first elastic capsule 2 to solidify the plugging slurry in the first elastic capsule 2 to form an end plugging block.

[0055] S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

[0056] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An emergency double-slurry plugging device, characterized in that: The invention comprises a hollow anchor rod (1), wherein the wall of the hollow anchor rod (1) is provided with a plurality of grouting holes (101), the front end of the hollow anchor rod (1) is covered with a water-expanding layer (5), the tail end of the hollow anchor rod (1) is connected to a first elastic capsule (2), the tail end of the first elastic capsule (2) is provided with a capsule tip (201) connected thereto, the capsule tip (201) is used to be connected to a grouting pipe for plugging slurry, a second elastic capsule (3) is provided in the first elastic capsule (2), the tail end of the second elastic capsule (3) is provided with a capsule tail pipe (301) connected thereto, the first elastic capsule (2) is provided with a capsule tail pipe (301) connected thereto, 01) passes through a through hole, the capsule tail tube (301) is used to connect with the water glass grouting pipe, the front end of the second elastic capsule (3) is connected with the grouting pipe (4), the grouting pipe (4) is arranged along the outside of the hollow anchor rod (1) and extends out of the outside of the first elastic capsule (2), the front end of the grouting pipe (4) is closed, and a plurality of small holes (401) are provided on the pipe wall, the grouting pipe (4) is made of a bendable material, and a plurality of bends are provided along the length direction of the grouting pipe (4) to form a bent pipe, and a plurality of magnetic rings (6) are set on the outside of the hollow anchor rod (1) and the grouting pipe (4) as a whole, and are arranged along the length direction of the hollow anchor rod (1).

2. The emergency double-slurry plugging device according to claim 1, characterized in that: The water-swelling layer (5) is a water-swelling material.

3. The emergency double-slurry plugging device according to claim 1, characterized in that: A plurality of capsule holes (202) are provided at the front end of the first elastic capsule (2).

4. The emergency double-slurry plugging device according to claim 1, characterized in that: The outer side of the hollow anchor rod (1) is provided with a groove (102) adapted to the grouting pipe (4), and the grouting pipe (4) is nested in the groove (102) on the outer side of the hollow anchor rod (1).

5. A method for dynamic water blocking, characterized in that: The emergency double-slurry plugging device according to any one of claims 1 to 4 is used for plugging, comprising the following steps: S1. Advance prediction: Ascertain the geological conditions, including groundwater development, rock mass structure type, water content in surrounding rocks, or the location and size of caves and cavities; S2. Determine the type of sudden water inrush: determine the sudden water head and the size of the sudden water inrush hole; S3, preparing slurry: preparing the plugging slurry to be injected into the first elastic capsule (2); S4. Equipment installation: The capsule tip (201) of the first elastic capsule (2) is connected to the plugging slurry grouting pipeline, and the capsule tail pipe (301) of the second elastic capsule (3) is connected to the water glass grouting pipeline. With the help of external equipment, the emergency double-slurry plugging body device is pushed into the water burst cave as a whole. Under the pressure of the water flow, the first elastic capsule (2) is compressed at the rear end of the hollow anchor rod (1); S5, double-liquid grouting and plugging: the plugging slurry prepared in step S3 is injected into the first elastic capsule (2) through the plugging slurry grouting pipe through the grouting equipment, the plugging slurry props up the first elastic capsule (2) to form a large-volume plugging block, and the plugging slurry is gathered around the hollow anchor rod (1) through the grouting hole (101) on the wall of the hollow anchor rod (1); water glass is pumped through the water glass grouting pipe through the second elastic capsule (3) and enters the water burst hole, and reacts with the plugging slurry to plug the water burst hole. After the water glass grouting is completed, the connection between the capsule tail pipe (301) and the water glass grouting pipe is disconnected, and the capsule tail pipe (301) is pushed into the first elastic capsule (2); S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

6. A dynamic water blocking method according to claim 5, characterized in that: In step S3, the plugging slurry includes cement slurry, magnetic particles, epoxy resin emulsion and its curing agent, the water-cement ratio of the cement slurry is 0.8:1 to 1:1; the amount of magnetic particles is 20% to 40% of the mass of the cement slurry, the uniformity coefficient Cu is greater than 5, and the curvature coefficient Cc×2 is 1 to 3; the amount of epoxy resin emulsion and its curing agent is 5% to 11% of the mass of the cement slurry.

7. A dynamic water blocking method according to claim 5, characterized in that: In step S3, the water glass modulus is 2.8 and the concentration is 35°Bé.

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