Emergency double-slurry plugging body device and flowing water plugging method

Abstract

The invention belongs to the field of water inrush treatment, and particularly provides an emergency double-slurry plugging body device and a flowing water plugging method.The emergency double-slurry plugging body device comprises a hollow anchor rod, a plurality of grouting holes are formed in the pipe wall of the hollow anchor rod, the tail end of the hollow anchor rod is connected with a first elastic capsule, and the tail of the first elastic capsule is provided with a capsule tip communicated with the first elastic capsule; the tail end of the capsule is used for being connected with a leaking stoppage slurry grouting pipeline, a second elastic capsule is arranged in the first elastic capsule, a capsule tail pipe communicated with the second elastic capsule is arranged at the tail end of the second elastic capsule, the first elastic capsule is provided with a through hole allowing the capsule tail pipe to penetrate through, the capsule tail pipe is used for being connected with a water glass grouting pipeline, and the front end of the second elastic capsule is connected with a grouting pipe. The grouting pipe is arranged along the outer side of the hollow anchor rod and extends out of the first elastic capsule, the front end of the grouting pipe is closed, and a plurality of small holes are formed in the pipe wall. According to the device and the method, double grout is injected, a block is rapidly formed for water plugging, and fixed-point plugging of a water inrush point is achieved.

Description

Technical Field

[0001] The 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, there are serious risks of geological disasters such as sudden water and mud. For example, in subway construction and tunnel construction, sudden water and mud in tunnels mostly occur in karst-developed areas, and some occur in water-rich fault zones. During the excavation of underground projects, due to the release of excavation stress, the groundwater in the aquifer, under the action of head pressure, overcomes the resistance of aquicludes, faults and fissure zones, wraps mud and sand, and suddenly rushes into the tunnel. This phenomenon is called sudden water and mud. The amount of water discharged from the water burst point is large and rapid, and it is impossible to block the water at a specific point and area. The current equipment is more troublesome in blocking sudden water and mud. However, when a sudden water and mud disaster occurs, it is easy to cause equipment loss, threaten personnel safety, delay construction period and other adverse effects.

[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 plug it, plug the water at the source, and avoid 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 body 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, a plurality of grouting holes are arranged on the wall of the hollow anchor rod, the tail end of the hollow anchor rod is connected to a first elastic capsule, a capsule tip connected to the tail of the first elastic capsule is arranged, the capsule tip is used to be connected to a plugging slurry grouting pipeline, a second elastic capsule is arranged in the first elastic capsule, a capsule tail pipe connected to the tail end of the second elastic capsule is arranged, 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 be connected to a 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 a plurality of small holes are arranged on the pipe wall.

[0006] In a preferred solution, the front end of the hollow anchor rod is coated with a water-swellable 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 mounted on the outer side of the hollow anchor rod and the grouting pipe as a whole and arranged along the length direction of the hollow anchor rod.

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

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

[0011] In a preferred solution, a groove adapted to a grouting pipe is provided on the outer side of the hollow anchor rod, and the grouting pipe is nested in the groove on the outer side 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, and includes the following steps: S1. Advance prediction: Ascertain the geological situation, including the development of groundwater, rock mass structure type, water content of surrounding rocks, or the location and size of caves and karst caves; S2. Determine the type of sudden water surge: determine the sudden water surge head and the size of the sudden water surge hole; S3, preparing slurry: preparing the plugging slurry injected into the first elastic capsule; S4. Equipment installation: The capsule tip of the first elastic capsule is connected to the plugging slurry grouting pipeline, and the capsule 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 body device is pushed into the water bursting cave as a whole. Under the pressure of water flow, the first elastic capsule is compressed at the rear end of the hollow anchor rod; S5, double liquid grouting and plugging: through the grouting equipment, the plugging slurry prepared in step S3 is injected into the first elastic capsule from the plugging slurry grouting pipeline, 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 on the hollow anchor pipe wall; water glass is pumped through the second elastic capsule through the water glass grouting pipeline and enters the water burst hole, and acts with the plugging slurry to plug the water burst hole. After the water glass grouting is completed, the connection between the capsule tail pipe and the water glass grouting pipeline is disconnected, and the capsule tail pipe is pushed into the first elastic capsule; S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

[0013] 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.

[0014] In a preferred embodiment, in step S3, the water glass modulus is 2.8 and the concentration is 35° Bé.

[0015] The present invention provides an emergency double-slurry plugging device and a dynamic water plugging method, which have the following beneficial effects: 1. First, inject plugging slurry into the water-bursting tunnel, and use 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 setting of the magnetic ring, the plugging slurry can be layered and adsorbed without loss to resist moving water. Inject the plugging slurry material gradually, reduce the pressure in stages, and form a large block for water plugging, avoiding the difficulty of overcoming water scouring and plugging under high water head. Water glass is injected through the second elastic capsule, and the water glass makes the plugging slurry solidify quickly, which has broad application prospects in emergency projects such as water bursts. For water bursts in underground engineering excavation and underground pipeline surges, the amount of water discharged is large and urgent, and it is impossible to block water at a fixed point and area. By using this device, it can be cut off from the source to avoid the disasters caused by subsequent accidents to the project and urban space.

[0016] 2. By setting 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.

[0017] 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 encounters water, its volume expands and squeezes the hole wall to enhance the anchoring performance.

[0018] 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, the device's anti-pullout and anti-dynamic water scouring performance is enhanced.

[0019] 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, so that the water glass reacts 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

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a structural schematic diagram of the emergency double-slurry plugging device involved in the present invention; Figure 2 for Figure 1 Section view along plane AA; Figure 3 It is a schematic diagram of the structure of the device of the present invention after grouting; Figure 4 It is a schematic diagram of the structure after the capsule tail tube is pushed into the first elastic capsule; Figure 5 A schematic diagram of the tunnel water inrush blocking method according to the present invention; In the figure: a hollow anchor rod 1, a grouting hole 101, a groove 102, a first elastic capsule 2, a capsule tip 201, a capsule hole 202, a second elastic capsule 3, a capsule tail tube 301, a grouting tube 4, a small hole 401, a water-expandable layer 5, and a magnetic ring 6. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is 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 used to limit the present invention.

[0022] Embodiment 1: like Figure 1~2 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 a 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 be connected to a plugging slurry grouting pipeline. The first elastic capsule 2 is used to retain the plugging slurry without being washed away by water. The plugging slurry material is injected gradually, and the pressure is reduced in stages to form a large block for water plugging, thereby avoiding the difficulty of overcoming water flow scouring and plugging under high water head.

[0023] The first elastic capsule 2 is provided with a second elastic capsule 3 for storing water glass. The tail end of the second elastic capsule 3 is provided with a capsule tail tube 301 connected thereto. 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 pipeline. The capsule tail tube 301 can be set to a metal material, which is convenient for pushing it into the first elastic capsule 2 after the pouring is completed, so that the water glass in the first elastic capsule 2 reacts with the plugging slurry, 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.

[0024] The front end of the second elastic capsule 3 is connected to the grouting pipe 4. A plurality of grouting pipes 4 can be provided, which are evenly spaced along the outer periphery of the hollow anchor rod 1. The grouting pipe 4 is provided along the outer side of the hollow anchor rod 1 and extends out of the outer side 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. Water glass can be ejected from the small holes 401 and enter into the plugging slurry material, solidify instantly, and enhance the material's ability to resist punching and shearing.

[0025] 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 .

[0026] 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 along the length direction of the hollow anchor rod 1 and arranged at a fixed interval. The magnetic rings 6 are provided to guide the plugging slurry containing magnetic substances so that the plugging slurry gathers around the hollow anchor rod 1.

[0027] 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 from the capsule holes 202 into the water inrush hole.

[0028] 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-pulling and anti-dynamic water scouring performance of the anchor rod.

[0029] 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, specifically, water-swelling rubber or water-swelling resin, etc. The water-swelling layer 5 extends into the water-inrush tunnel as a first-level water blocking measure, expands in volume after encountering water, and squeezes the hole wall to enhance the anchoring performance.

[0030] 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 0.8:1~1:1; in this embodiment, the water-cement ratio is 1:1; the amount of magnetic particles is 20%~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%~11% of the mass of the cement slurry, and the mass ratio of epoxy resin emulsion and its curing agent is 5:6.

[0031] The water glass injected into the second elastic capsule 3 has a modulus of 2.8 and a concentration of 35° Bé.

[0032] The device first injects plugging slurry into the water inrush 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 to resist moving 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, it has broad application prospects in emergency projects such as water inrush. For water inrush during underground excavation and sudden surges in underground pipelines, the amount of water discharged is large and rapid, and it is impossible to block water at a specific point or area. By using this device, the water can be cut off from the source to avoid the disasters caused by subsequent accidents to the project and urban space.

[0033] Embodiment 2: The present invention also provides a dynamic water plugging method, comprising the following steps: S1. Advance prediction: Explore the geological overview, including the development of groundwater, rock structure type, water content of surrounding rocks, or the location and size of caves and karst caves.

[0034] S2. Determine the type of sudden water surge: determine the sudden water head and the size of the sudden water surge hole.

[0035] S3, preparing slurry: preparing 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 0.8:1-1:1, the amount of magnetic particles is 20%-40%, Cu>5 and 2Cc=1-3.

[0036] 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 water flow, the first elastic capsule 2 is compressed at the rear end of the hollow anchor rod 1.

[0037] 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 pipeline 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 pipeline and enters the water burst hole, and acts with the plugging slurry to block the water burst hole. The water glass modulus is 2.8 and the concentration is 35°Bé.

[0038] 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.

[0039] S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

[0040] It will be easily understood by those skilled in the art that the above description is only 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 protection scope of the present invention.

Claims

1. An emergency double-slurry plugging device, characterized in that: The invention comprises a hollow anchor rod (1), wherein a plurality of grouting holes (101) are provided on the wall of the hollow anchor rod (1), 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 plugging grouting pipeline, a second elastic capsule (3) is provided inside 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 through hole for the capsule tail pipe (301) to pass through, the capsule tail pipe (301) is used to be connected to a water glass grouting pipeline, the front end of the second elastic capsule (3) is connected to a grouting pipe (4), the grouting pipe (4) is provided along the outer side of the hollow anchor rod (1) and extends out of the outer side 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 wall.

2. An emergency double-slurry plugging device according to claim 1, characterized in that: The front end of the hollow anchor rod (1) is coated with a water-expandable layer (5).

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

4. The emergency double-slurry plugging device according to claim 1 is characterized in that: A plurality of magnetic rings (6) are sleeved on the outer sides 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).

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

6. The emergency double-slurry plugging device according to claim 1 is characterized in that: The grouting pipe (4) is made of a bendable material, and a plurality of bends are arranged along the length direction of the grouting pipe (4) to form a bent pipe.

7. The emergency double-slurry plugging device according to claim 1 is 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).

8. A method for dynamic water blocking, characterized in that: The emergency double-slurry plugging device according to any one of claims 1 to 7 is used for plugging, comprising the following steps: S1. Advance prediction: Ascertain the geological situation, including the development of groundwater, rock mass structure type, water content of surrounding rocks, or the location and size of caves and karst caves; S2. Determine the type of sudden water surge: determine the sudden water surge head and the size of the sudden water surge 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 bursting 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 pipeline by means of a grouting device, 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 pipeline through the second elastic capsule (3) and enters 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 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); S6. Post-cleaning: After the slurry solidifies, clean up the excess slurry and repair small local leaks and seepage in time.

9. A dynamic water blocking method according to claim 8, 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 0.8:1-1:1; the amount of magnetic particles is 20%-40% of the mass of the cement slurry, 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%-11% of the mass of the cement slurry.

10. A dynamic water blocking method according to claim 8, characterized in that: In step S3, the water glass modulus is 2.8 and the concentration is 35° Bé.

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