Tunnel double-pressure segmented grouting device
By using the internal grouting pipe of the double-pressure segmented grouting device in tunnel construction, the design of the grouting pipe reversing from the inside to the outside and the piston mechanism to separate the pressure chamber and the grouting chamber in traditional grouting technology is solved, and more efficient surrounding rock reinforcement and construction safety guarantees are achieved.
Patent Information
- Application Number
- CN202421290414.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Traditional tunnel double-liquid grouting technology is prone to problems such as pipe blocking, insufficient tail pressure and insufficient slurry diffusion during long-distance construction, resulting in poor reinforcement effect of surrounding rock, increasing construction safety hazards and affecting construction progress.
A tunnel double-pressure segmented grouting device is designed, using an internal grouting pipe to revert from the inside to the outside, and the pipe shed pipe is divided into a pressure chamber and a grouting chamber through a piston mechanism. The external pressurization equipment of the pressure chamber increases the grouting density and realizes segmented grouting.
It effectively reduces the problem of blockage of double slurry in the orifice section, ensures that the grouting diffusion at the tail of the pipe shed reaches the maximum effect, and improves construction safety and construction progress.
Smart Images
Figure CN222894267U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of double-liquid grouting in tunnels, in particular to a double-pressure segmented grouting device in a tunnel. Background Art
[0002] At present, various weak surrounding rocks are prone to appear during tunnel construction. For the geological conditions where cracks are developed and the rock mass moisture reaches saturation, the slurry diffusion reinforcement effect of conventional grouting construction is not very good. Traditional double-liquid grouting is prone to blockage of pipes for pipe sheds above 10m, resulting in incomplete grouting. In addition, insufficient tail pressure causes low slurry diffusion coefficient, poor surrounding rock reinforcement effect, and seriously increases construction safety hazards and affects construction progress.
[0003] The traditional grouting method has the following shortcomings:
[0004] 1. In traditional cement slurry grouting, the slurry loss in the areas with more developed surrounding rock fissures is serious, the pressure is insufficient, the tail grouting is not dense, the reinforcement effect is poor, and the liquid limit index of the geology at this location is aggravated under the geological condition of rock moisture saturation, which is very likely to cause landslides, water and mud gushing.
[0005] 2. Traditional double-liquid grouting can easily cause partial blockage of the grouting port, loose grouting at the tail, or even no grout at the tail.
[0006] 3. In the traditional grouting process, after the end is sealed, the slurry flows from the outside to the inside, and the slurry needs to be continuously pressurized to reach the tail rock mass, which can easily cause slurry loss, insufficient tail pressure, and loose grouting. Utility Model Content
[0007] The purpose of the utility model is to provide a tunnel double-pressure segmented grouting device in response to the above-mentioned problems, increase internal grouting pipes, and grout backwards from the inside to the outside, thereby reducing the problem of double-liquid slurry clogging in the orifice section, ensuring that the grouting diffusion at the tail of the pipe rack achieves the maximum effect, and effectively ensuring construction safety.
[0008] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:
[0009] According to one aspect of the utility model, a tunnel double-pressure segmented grouting device is provided, comprising a grouting pipe, a pipe support pipe and a piston mechanism;
[0010] One end of the grouting pipe is sleeved in the pipe-roof pipe, and the piston mechanism is fixedly arranged at the end thereof. The piston mechanism is movably connected to the pipe-roof pipe and divides the interior of the pipe-roof pipe into a pressure chamber and a grouting chamber;
[0011] The grouting pipe is placed in the pressure chamber, one end of the pressure chamber away from the piston mechanism is sealed, and the pressure chamber is connected to an external pressurizing device;
[0012] The grouting cavity is communicated with the grouting pipe, and a grouting hole is provided on the grouting cavity.
[0013] Preferably, the piston mechanism comprises a fastening assembly and a piston ring, the fastening assembly is fixedly connected to the grouting pipe, and the piston ring is fixedly connected to the fastening assembly.
[0014] Preferably, the fastening assembly includes a first clamp ring and a second clamp ring, the first clamp ring is fixedly arranged on the grouting pipe, the first clamp ring is fixedly connected to the piston ring, the second clamp ring is fixedly arranged on the grouting pipe, and the second clamp ring is fixedly connected to an end of the piston ring away from the first clamp ring.
[0015] Preferably, it also includes an anti-reflux rubber pad and at least two adjustment components, the anti-reflux rubber pad is movably connected to at least two of the adjustment components, and one end of each of the adjustment components away from the anti-reflux rubber pad is connected to the piston mechanism.
[0016] Preferably, the adjustment assembly includes an adjusting screw, an adjusting nut and a spring, one end of the adjusting screw is threadedly connected to the piston mechanism, the other end passes through the anti-reflux rubber pad and is movably connected to the anti-reflux rubber pad, the adjusting nuts are fixedly provided at both ends of the adjusting screw, one end of the spring is fixedly connected to the anti-reflux rubber pad, and the other end is fixedly connected to the adjusting nut close to the anti-reflux rubber pad.
[0017] Preferably, it also includes a plugging tube, a fixing component and a sealing ring, one end of the plugging tube is placed in the pressure chamber and is sleeved on the grouting tube, the plugging tube is communicated with the pressure chamber, the end of the plugging tube away from the pressure chamber is sealed, a pressurizing port is opened on the plugging tube, and the pressurizing port is communicated with the pressure chamber, at least two fixing components are arranged, one end of each of the fixing components is connected to the plugging tube, and the other end is connected to the pipe rack pipe, one end of the sealing ring is connected to one end of the fixing component close to the plugging tube, and the other end is connected to the pipe mouth of the pipe rack pipe.
[0018] Preferably, the fixing assembly includes a first fixing ring, a fixing screw and a second fixing ring, the first fixing ring is fixedly arranged on the sealing pipe, the second fixing ring is fixedly arranged on the pipe support pipe, one end of the fixing screw is threadedly connected to the first fixing ring, and the other end is threadedly connected to the second fixing ring, and both end ends of the fixing screw are threadedly connected with fixing nuts.
[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0020] 1. The utility model arranges an internal grouting pipe in the pipe-roof pipe, and arranges a piston mechanism at the end of the grouting pipe. The piston mechanism is movably connected to the pipe-roof pipe, and the pipe-roof pipe is divided into a pressure chamber and a grouting chamber by the piston mechanism. The pressure of the grouting chamber is used to move the piston mechanism, so that the grouting chamber continuously covers the grouting holes on the pipe-roof pipe, and grouting is performed backward from the inside to the outside, thereby reducing the blockage problem of the double-liquid slurry in the orifice section, ensuring that the grouting diffusion at the tail of the pipe-roof reaches the maximum effect, and the construction safety is effectively guaranteed.
[0021] 2. The utility model adopts pressure chamber pressurization to increase the density of front-end grouting, realizes segmented grouting, and each segment of grouting can reach the designed pressure value.
[0022] 3. The utility model has a simple structure and low investment cost, and can be put into use at any time during the project construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0024] In the attached drawings, 1. grouting pipe; 2. pipe support pipe; 3. fastening assembly; 4. piston ring; 5. pressure chamber; 6. grouting chamber; 7. grouting hole; 8. anti-backflow rubber pad; 9. adjustment assembly; 10. reinforcement plate; 11. blocking pipe; 12. fixing assembly; 13. sealing ring; 14. pressurizing port; 15. slurry inlet; 31. first clamping ring; 32. second clamping ring; 91. adjusting screw; 92. adjusting nut; 93. spring; 121. first fixing ring; 122. fixing screw; 123. second fixing ring. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be realized even without these specific details.
[0026] See also Figure 1 The utility model provides a double-pressure segmented grouting device for a tunnel, and the technical solution is as follows:
[0027] The double-pressure segmented grouting device for a tunnel comprises a grouting pipe 1, a pipe support pipe 2 and a piston mechanism. A grouting inlet 15 is provided on the grouting pipe 1, the grouting inlet 15 is connected to the grouting pipe 1, and a one-way throttle valve is arranged on the grouting inlet 15. One end of the grouting pipe 1 is sleeved in the pipe support pipe 2, and a piston mechanism is fixedly arranged at its end. The piston mechanism is movably connected to the pipe support pipe 2, and the interior of the pipe support pipe 2 is divided into a pressure chamber 5 and a grouting chamber 6, wherein the pipe support pipe 2 is a steel flower pipe. Specifically, the piston mechanism comprises a fastening assembly 3 and a piston ring 4, the fastening assembly 3 comprises a first clamping ring 31 and a second clamping ring 32, the inner ring of the first clamping ring 31 is fixedly sleeved on the grouting pipe 1, one end face of the first clamping ring 31 is fixedly connected to one end face of the piston ring 4, the second clamping ring 32 is fixedly sleeved on the grouting pipe 1, and one end face of the second clamping ring 32 is fixedly connected to one end face of the piston ring 4 away from the first clamping ring 31. The first clamp ring 31 and the second clamp ring 32 are used to fix the piston ring 4. The piston ring 4 is in close contact with the inner wall of the pipe-support pipe 2 and has a sealing effect. By cooperating with the grouting pipe 1, the inside of the pipe-support pipe 2 is divided into a pressure chamber 5 and a grouting chamber 6. The grouting pipe 1 is placed in the pressure chamber 5, and the grouting pipe 1 is connected to the grouting chamber 6. The piston ring 4 can move relative to the inner wall of the pipe-support pipe 2 according to the pressure of the pressure chamber 5 and the grouting chamber 6. When the grouting pipe 1 continuously transports the double liquid slurry to the grouting chamber 6, the double liquid slurry is first discharged from the first grouting hole 7 close to the end of the pipe-support pipe 2. Because a plurality of grouting holes 7 are arranged at intervals along the axis of the pipe-roof pipe 2, when the pressure in the grouting cavity 6 increases continuously and the pressure in the grouting cavity 6 is greater than the pressure in the pressure cavity 5, the piston ring 4 moves toward the pressure cavity 5, reducing the space in the pressure cavity 5. When the second grouting hole 7 is placed in the grouting cavity 6, the double liquid slurry is discharged from the second grouting hole 7, and so on, the double liquid slurry is discharged from the first grouting hole 7, the second grouting hole 7, and the Nth grouting hole 7 in turn, thereby achieving the effect of reverse grouting. By setting an internal grouting pipe 1, grouting is performed backward from the inside to the outside, reducing the blockage problem of the double liquid slurry in the orifice section, ensuring that the grouting diffusion at the tail of the pipe-roof reaches the maximum effect, and effectively ensuring construction safety.
[0028] Furthermore, in order to prevent the double slurry in the grouting cavity 6 from flowing back into the grouting pipe 1, in this embodiment, an anti-backflow rubber pad and at least two adjustment components 9 are also included. When the pressure in the grouting cavity 6 is too high, the grouting pipe 1 is blocked by the anti-backflow rubber pad to prevent the double slurry in the grouting cavity 6 from flowing back into the grouting pipe 1. Specifically, two adjustment components 9 are provided, and the two adjustment components 9 are respectively located on opposite sides of the grouting pipe 1. The adjustment components 9 include an adjustment screw 91, an adjustment nut 92 and a spring 93. One end of the adjustment screw 91 passes through the second clamp ring 32, the piston ring 4 and the first clamp ring 31 respectively, and is threadedly connected to the second clamp ring 32, the piston ring 4 and the first clamp ring 31 respectively, and an adjustment nut 92 is fixedly provided at its end. The other end of the adjusting screw 91 passes through the anti-backflow pad, and an adjusting nut 92 is fixedly arranged at its end. A spring 93 is arranged between the anti-backflow pad and the adjusting nut 92 close to the anti-backflow pad, one end of the spring 93 is fixedly connected to the anti-backflow pad, and the other end of the spring 93 is fixedly connected to the adjusting nut 92. The anti-backflow pad is used to prevent the slurry from flowing back to the grouting pipe 1 after the grouting pressure is greater than the design value. When the pressure of the grouting chamber 6 is too large, the slurry in the grouting chamber 6 squeezes the anti-backflow pad, so that the anti-backflow pad moves toward the grouting pipe 1. When the anti-backflow pad is in close contact with the grouting pipe 1, it serves the purpose of blocking the mouth of the grouting pipe 1, thereby preventing the slurry from flowing back to the grouting pipe 1. The positions of the first clamp ring 31, the piston ring 4 and the second clamp ring 32 are staggered from the grouting hole 7 of the pipe support pipe 2 to ensure that the grouting pressure and the pressure of the pressure chamber 5 are not leaked.
[0029] In order to increase the strength of the anti-backflow rubber pad, a reinforcing plate 10 is provided on one side of the anti-backflow rubber pad, and one side surface of the reinforcing plate 10 is fixedly connected to one side surface of the anti-backflow rubber pad.
[0030] Furthermore, in order to achieve the blocking of the pipe-roof pipe 2 and improve the flexibility of the device. In this embodiment, the pipe-roof pipe 2 is flexibly blocked by setting a blocking pipe 11, a fixing assembly 12 and a sealing ring 13 at the end of the pipe-roof pipe 2. Specifically, one end of the blocking pipe 11 is sleeved in the pipe-roof pipe 2 and sleeved on the grouting pipe 1. The blocking pipe 11 is connected to the pressure chamber 5. A pressurizing port 14 is provided on the blocking pipe 11. The pressurizing port 14 is connected to an external pressurizing device, and the pressure chamber 5 is pressurized by the external device. A one-way throttle valve is provided on the pressurizing port 14 to prevent pressure leakage. One end of the blocking pipe 11 placed outside the pipe-roof pipe 2 is sealed. The blocking pipe 11 is connected to the pipe-roof pipe 2 through at least two fixing assemblies 12, and the fixing assembly 12 includes a first fixing ring 121, a fixing screw 122 and a second fixing ring 123. The first fixing ring 121 is fixedly arranged on the plugging pipe 11, the second fixing ring 123 is fixedly arranged on the pipe-supporting pipe 2, one end of the fixing screw 122 is threadedly connected to the first fixing ring 121, and the other end is threadedly connected to the second fixing ring 123, and both ends of the fixing screw 122 are threadedly connected with fixing nuts. In order to seal the pipe opening of the pipe-supporting pipe 2, a sealing ring 13 is arranged between the first fixing ring 121 and the pipe opening of the pipe-supporting pipe 2, and by adjusting the fixing nut, the close contact degree between the first fixing ring 121, the grouting pipe 1, the sealing ring 13 and the pipe-supporting pipe 2 can be adjusted, thereby ensuring the sealing of the pipe-supporting pipe 2. The use of bolt connection plugging can quickly plug the end of the pipe-supporting pipe, reduce the construction period under weak surrounding rock, and a single person can complete the plugging operation, thereby enhancing construction safety.
[0031] When in use, after the external slurrying equipment completes slurrying, the slurry enters the grouting pipe 1 through the slurry inlet 15. At the same time, the external pressurizing equipment pressurizes the pressure chamber 5 through the pressurizing port 14. The slurry is pumped through the grouting pipe 1 to the grouting chamber 6 2m away from the end. The slurry diffuses to the surrounding rock through the first grouting hole on the pipe-supporting pipe 2. When the pressure of the grouting chamber 6 is greater than the pressure of the pressure chamber, the piston ring 4 moves toward the pressure chamber 5. When the piston ring 4 moves beyond the second grouting hole on the pipe-supporting pipe 2, the second grouting hole is located on the grouting chamber 6 at this time, and the slurry is discharged from the second grouting hole, and so on, until the grouting is completed.
[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. Tunnel double-pressure segmented grouting device, characterized in that: It includes a grouting pipe, a pipe shed pipe and a piston mechanism; One end of the grouting pipe is sleeved in the pipe-roof pipe, and the piston mechanism is fixedly arranged at the end thereof. The piston mechanism is movably connected to the pipe-roof pipe and divides the interior of the pipe-roof pipe into a pressure chamber and a grouting chamber; The grouting pipe is placed in the pressure chamber, one end of the pressure chamber away from the piston mechanism is sealed, and the pressure chamber is connected to an external pressurizing device; The grouting cavity is communicated with the grouting pipe, and a grouting hole is provided on the grouting cavity.
2. The tunnel double-pressure segmented grouting device according to claim 1 is characterized in that: The piston mechanism comprises a fastening assembly and a piston ring. The fastening assembly is fixedly connected to the grouting pipe, and the piston ring is fixedly connected to the fastening assembly.
3. The tunnel double-pressure segmented grouting device according to claim 2 is characterized in that: The fastening assembly includes a first clamp ring and a second clamp ring, the first clamp ring is fixedly arranged on the grouting pipe, the first clamp ring is fixedly connected to the piston ring, the second clamp ring is fixedly arranged on the grouting pipe, and the second clamp ring is fixedly connected to an end of the piston ring away from the first clamp ring.
4. The tunnel double-pressure segmented grouting device according to claim 2 is characterized in that: It also includes an anti-reflux rubber pad and at least two adjustment components. The anti-reflux rubber pad is movably connected to at least two of the adjustment components, and one end of each of the adjustment components away from the anti-reflux rubber pad is connected to the piston mechanism.
5. The tunnel double-pressure segmented grouting device according to claim 4 is characterized in that: The adjusting assembly includes an adjusting screw, an adjusting nut and a spring. One end of the adjusting screw is threadedly connected to the piston mechanism, and the other end passes through the anti-reflux rubber pad and is movably connected to the anti-reflux rubber pad. The adjusting nuts are fixedly provided at both ends of the adjusting screw. One end of the spring is fixedly connected to the anti-reflux rubber pad, and the other end is fixedly connected to the adjusting nut close to the anti-reflux rubber pad.
6. The tunnel double-pressure segmented grouting device according to claim 1 is characterized in that: It also includes a plugging tube, a fixing assembly and a sealing ring, one end of the plugging tube is placed in the pressure chamber and is sleeved on the grouting tube, the plugging tube is communicated with the pressure chamber, the end of the plugging tube away from the pressure chamber is sealed, a pressurizing port is opened on the plugging tube, and the pressurizing port is communicated with the pressure chamber, at least two fixing assemblies are arranged, one end of each of the fixing assemblies is connected to the plugging tube, and the other end is connected to the pipe rack pipe, one end of the sealing ring is connected to the end of the fixing assembly close to the plugging tube, and the other end is connected to the pipe mouth of the pipe rack pipe.
7. The tunnel double-pressure segmented grouting device according to claim 6 is characterized in that: The fixing assembly includes a first fixing ring, a fixing screw and a second fixing ring. The first fixing ring is fixedly arranged on the blocking pipe, and the second fixing ring is fixedly arranged on the pipe support pipe. One end of the fixing screw is threadedly connected to the first fixing ring, and the other end is threadedly connected to the second fixing ring. Both end portions of the fixing screw are threadedly connected with fixing nuts.