Tunnel water inrush prevention grouting device

Abstract

The utility model provides a tunnel water inrush prevention grouting device, which is characterized in that one end of an orifice pipe extends out of a grouting hole, the part of the orifice pipe extending into the grouting hole is sleeved with a rubber sleeve, one end of the orifice pipe extending into the grouting hole is provided with a stop flange, and the outer wall of the orifice pipe is in threaded connection with a driving nut corresponding to the rubber sleeve; the grouting hole is sealed by extruding the rubber sleeve; one end of the drainage pipe is connected with the orifice pipe through a flange plate, and the other end of the drainage pipe fixes the grouting pipe through a sealing piece and extends into the bottom of the grouting hole after penetrating through the orifice pipe; the rubber sleeve extrudes the grouting hole in the radial direction through extrusion, sealing is formed through extrusion force and the grouting hole, the rubber sleeve can be withdrawn after grouting is completed and initial setting is conducted, recycling is achieved, the service life of the grouting device is prolonged, the drainage pipe is arranged, normal grouting is prevented from being affected by too high internal pressure, and water in the grouting hole can be drained.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel grouting, and in particular relates to a tunnel water burst prevention grouting device. Background Art

[0002] Under complex geological conditions, particularly in water-rich karst areas, water inrush and bursts within tunnels can cause significant problems for projects. At best, this can cause delays and impact project progress, while at worst, it can threaten construction safety. Grouting is a commonly used reinforcement method in tunnel projects, but due to its inability to effectively seal the grouting holes and its limited ability to withstand high pressures, grouting is less effective.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art, and the utility model provides a tunnel anti-water burst grouting device.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A tunnel water inrush prevention grouting device, comprising:

[0007] An orifice pipe, one end of which extends into the grouting hole, a rubber sleeve being sleeved on the portion of the orifice pipe extending into the grouting hole, a stop flange being provided on the end of the orifice pipe extending into the grouting hole, a drive nut corresponding to the rubber sleeve being threadedly connected to the outer wall of the orifice pipe, so as to seal the grouting hole by squeezing the rubber sleeve;

[0008] A drainage pipe, one end of which is connected to the orifice pipe via a flange, and the other end of which is fixed to a grouting pipe via a seal, wherein the grouting pipe passes through the orifice pipe and extends into the bottom of the grouting hole;

[0009] A drain valve is provided in the middle of the drain pipe.

[0010] Preferably, the sealing member is a fixed plate fixed to the outer wall of the grouting pipe, and the fixed plate is fixed to the end of the drainage pipe away from the grouting hole by bolts and a flange.

[0011] Preferably, the sealing member is a sliding disk slidably assembled on the outer wall of the grouting pipe, the end of the drainage pipe away from the grouting hole is connected to the smaller end of the conical sleeve through a flange, the outer sleeve of the grouting pipe is provided with a conical plug corresponding to the conical sleeve, and the sliding disk fixes the conical sleeve by bolts to squeeze the conical plug, so that the conical plug radially squeezes and seals the inner wall of the conical sleeve and the outer wall of the grouting pipe.

[0012] Preferably, the inner diameters of the orifice pipe and the drain pipe are larger than the outer diameter of the grouting pipe, and a water pressure gauge is provided on the drain pipe.

[0013] Preferably, the outer wall of the rubber sleeve is provided with a plurality of flanges corresponding to the inner walls of the grouting holes.

[0014] Preferably, the cross section of the flange is wedge-shaped, with the larger end of the wedge pointing toward the bottom of the grouting hole.

[0015] Beneficial effects: The rubber sleeve is squeezed into the grouting hole in the radial direction by extrusion, and a seal is formed with the grouting hole by the extrusion force. After the grouting is completed and initially set, the rubber sleeve can be withdrawn, thereby realizing recycling and improving the service life of the grouting device. A drainage pipe is set to avoid excessive internal pressure affecting normal grouting, and the water in the grouting hole can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0017] Figure 1 This is a simplified structural diagram of a fixed plate fixedly connected to a grouting pipe in a specific embodiment provided by the present utility model;

[0018] Figure 2 This is a simplified structural diagram of the grouting pipe being squeezed and sealed by a sliding disc in a specific embodiment provided by the present utility model;

[0019] Figure 3 This is a simplified structural diagram of a grouting pipe in a specific embodiment provided by the present invention, in which the grouting pipe is squeezed and sealed by the internal pressure of the pipe.

[0020] In the figure: 1. Grouting pipe; 2. Orifice pipe; 3. Rubber sleeve; 4. Drive nut; 5. Drain pipe; 6. Drain valve; 7. Conical plug; 8. Water pressure gauge; 9. Fixed plate; 10. Conical sleeve; 11. Sliding plate. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 are within the scope of protection of the present invention.

[0022] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0024] like Figure 1-3 As shown, a tunnel anti-water burst grouting device comprises an orifice pipe 2, a drainage pipe 5 and a grouting pipe 1. The outer diameter of the orifice pipe 2 is smaller than the inner diameter of the grouting hole, the inner diameter of the drainage pipe 5 is larger than the inner diameter of the grouting pipe 1, and the inner diameter of the grouting pipe 1 is larger than the outer diameter of the grouting pipe 1. One end of the orifice pipe 2 extends into the grouting hole, and the other end of the orifice pipe 2 remains outside the grouting hole. The portion of the orifice pipe 2 extending into the grouting hole is sleeved with a rubber sleeve 3. The length of the rubber sleeve 3 is determined according to actual conditions. Generally, the length of the orifice pipe 2 is not less than 50 cm, and the length of the rubber sleeve 3 is not less than 40 cm under normal conditions. A stop flange is provided at one end of the orifice pipe 2 extending into the grouting hole, and the outer diameter of the stop flange is slightly smaller than the inner diameter of the grouting hole. A drive nut 4 corresponding to the rubber sleeve 3 is threadedly connected to the outer wall of the orifice pipe 2. An outer thread is provided at one end of the outer wall of the orifice pipe 2 close to the drainage pipe 5. By rotating the driving nut 4, the rubber sleeve 3 is deformed by axial extrusion, and the grouting hole is sealed by radial extrusion of the rubber sleeve 3, abandoning the traditional technology of sealing by supplying high-pressure slurry into the rubber bladder. At the same time, it avoids the problem of difficulty in removing the rubber bladder caused by the initial setting of the slurry, and is easy to install and disassemble. One end of the drainage pipe 5 is connected to the orifice pipe 2 through a flange. A drain valve 6 is provided in the middle of the drainage pipe 5. The drain valve 6 is connected to the grouting hole and can be used to relieve pressure when the pressure is high. The drain valve 6 is connected to the drain trough through a connecting pipe to avoid polluting the construction environment in the tunnel. The other end of the drainage pipe 5 is fixed to the grouting pipe 1 through a seal. The grouting pipe 1 passes through the orifice pipe 2 and extends into the bottom of the grouting hole. Therefore, during the grouting process, water can enter the drainage pipe 5 from the gap between the grouting pipe 1 and the orifice pipe 2.

[0025] In an optional embodiment, the sealing member is a fixed disk 9 fixed to the outer wall of the grouting pipe 1. The fixed disk 9 is a circular structure, and its inner hole is connected to the flange at the end of the drain pipe 5 by welding or threaded assembly. The fixed disk 9 is fixed to the end of the drain pipe 5 away from the grouting hole by bolts and flanges, and is sealed by a sealing gasket, thereby fixing and sealing the grouting pipe 1 to ensure normal grouting.

[0026] In another optional embodiment, the sealing member is a sliding disk 11 that is slidably assembled on the outer wall of the grouting pipe 1. The sliding disk 11 of this embodiment is also annular, and its inner hole diameter is larger than the grouting hole, so that it can slide along the grouting pipe 1, and the grouting pipe 1 can be adjusted in position according to the depth of the grouting hole. Specifically, the smaller end of the conical sleeve 10 is connected to the end of the drainage pipe 5 away from the grouting hole through a flange, and the outer sleeve of the grouting pipe 1 is provided with a conical plug 7 corresponding to the conical sleeve 10. The conical plug 7 is made of rubber, and its inner hole is transitionally matched with the grouting pipe 1. A plurality of bolts are provided on the edge of the sliding disk 11, which are bolted to the flange at the end of the drainage pipe 5. The drainage pipe 5 is fixed by bolts, thereby driving the sliding disk 11 to squeeze the conical plug 7, so that the conical plug 7 extends into the conical sleeve 10. As the extrusion progresses, the conical plug 7 radially squeezes the inner wall of the sealing conical sleeve 10 and the outer wall of the grouting pipe 1, thereby sealing the grouting pipe 1 and the drainage pipe 5.

[0027] In another embodiment, the sealing member is a tapered plug 7. The inner hole of the drain pipe 5 is a circular hole. The end of the drain pipe 5 away from the grouting hole is connected to the larger end of the tapered sleeve 10 via a flange. The inner diameter of the larger end of the tapered sleeve 10 is adapted to the inner diameter of the drain pipe 5. The tapered sleeve 10 is slidably assembled in the drain pipe 5. The larger end of the tapered sleeve 10 is adapted to the inner diameter of the drain pipe 5, and the two are interference fit. The tapered plug 7 is made of rubber, and its inner hole is transitionally matched with the grouting pipe 1. Therefore, after the grouting pipe 1 is installed, it can move like a piston with the drain pipe 5. After the grouting pipe 1 and the tapered sleeve 10 are installed, the tapered sleeve 10 is assembled with the flange at the end of the drain pipe 5. In this way, during the grouting process, the pressure in the pipe squeezes the tapered plug 7 into the tapered sleeve 10, thereby forming a radial extrusion seal. In this way, this embodiment does not need to use a sliding plate 11, further simplifying the device structure.

[0028] In an optional embodiment, the inner diameters of the orifice pipe 2 and the drain pipe 5 are larger than the outer diameter of the grouting pipe 1. A water pressure gauge 8 is provided on the drain pipe 5 to display the water pressure within the pipe, thereby releasing the pressure after reaching a preset pressure value to ensure normal grouting of the grouting pipe 1. To increase the friction of the rubber sleeve 3, the outer wall of the rubber sleeve 3 is provided with multiple flanges corresponding to the inner walls of the grouting holes. The flanges have a wedge-shaped cross-section, with the larger end of the wedge pointing toward the bottom of the grouting hole, thereby enhancing the sealing ability and improving the pull-out resistance of the grouting device.

[0029] In an optional embodiment, a plurality of rivets are provided on the outer wall of the rubber sleeve, and the rivets are solidified into one with the rubber sleeve through injection molding. The rivets are provided with a top cap at one end of the rubber sleeve, and the other end extends to the outer surface of the rubber sleeve, thereby achieving the purpose of locking the grouting hole.

[0030] 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, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A tunnel water inrush prevention grouting device, characterized in that: include: An orifice pipe, one end of which extends into the grouting hole, a rubber sleeve being sleeved on the portion of the orifice pipe extending into the grouting hole, a stop flange being provided on the end of the orifice pipe extending into the grouting hole, a drive nut corresponding to the rubber sleeve being threadedly connected to the outer wall of the orifice pipe, so as to seal the grouting hole by squeezing the rubber sleeve; A drainage pipe, one end of which is connected to the orifice pipe via a flange, and the other end of which is fixed to a grouting pipe via a seal, wherein the grouting pipe passes through the orifice pipe and extends into the bottom of the grouting hole; A drain valve is provided in the middle of the drain pipe.

2. The tunnel water inrush prevention grouting device according to claim 1, characterized in that: The sealing member is a fixed disk fixed to the outer wall of the grouting pipe, and the fixed disk is fixed to one end of the drain pipe away from the grouting hole through bolts and a flange.

3. The tunnel water inrush prevention grouting device according to claim 1, characterized in that: The sealing member is a sliding disk slidably assembled on the outer wall of the grouting pipe. The end of the drainage pipe away from the grouting hole is connected to the smaller end of the conical sleeve through a flange. The outer sleeve of the grouting pipe is provided with a conical plug corresponding to the conical sleeve. The sliding disk fixes the conical sleeve by bolts to squeeze the conical plug, so that the conical plug radially squeezes and seals the inner wall of the conical sleeve and the outer wall of the grouting pipe.

4. The tunnel water inrush prevention grouting device according to claim 1, characterized in that: The inner diameters of the orifice pipe and the drainage pipe are larger than the outer diameter of the grouting pipe, and a water pressure gauge is provided on the drainage pipe.

5. The tunnel water inrush prevention grouting device according to claim 1, characterized in that: The outer wall of the rubber sleeve is provided with a plurality of flanges corresponding to the inner walls of the grouting holes.

6. The tunnel water inrush prevention grouting device according to claim 5, characterized in that: The cross section of the flange is wedge-shaped, with the larger end of the wedge pointing to the bottom of the grouting hole.

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