Tunnel secondary lining anti-void precise slurry supplementing equipment
By using equipment such as air-removing grouting pipes, guide wheels and scale pipe reels in tunnel construction, combined with distributed compression sensor monitoring, the precise slurry replenishment of the secondary lining vault of the tunnel is achieved, and the excessive grouting pressure is solved The resulting formwork deformation and slurry waste ensures the compactness of the lining vault.
Patent Information
- Application Number
- CN202323656374.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-31
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-31
AI Technical Summary
The tunnel secondary lining vault vault has a major hidden danger during the construction process. Existing monitoring and prevention measures are difficult to achieve precise slurry replenishment, resulting in excessive grouting pressure, resulting in template deformation and slurry waste.
A tunnel secondary lining anti-air removal precision slurry replenishment equipment was designed, including slurry grouting pipes, guide wheels, scale pipe reels, rigid connecting pipes, pressure gauges and pressure sensors, and the vaults are monitored through distributed compression sensors. In a compact state, the grouting tube outlet is accurately adjusted using the scale reel and guide wheel to ensure the accuracy of slurry replenishment and control the grouting pressure.
The accuracy of grouting is improved, the template deformation and slurry waste caused by excessive grouting pressure are avoided, and the compactness of the lining vault is ensured.
Smart Images
Figure CN222207918U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of tunnel engineering, in particular to a tunnel secondary lining anti-cavitation precise grouting device. Background Art
[0002] The secondary lining vault debulking is a common construction defect in the tunnel construction process. There are many reasons for the secondary lining vault debulking of the tunnel, and the common reasons are classified into three types: one is that the steel formwork trolley is used to pour concrete on site. At this time, the improper position of the scaffolding will also cause gaps in the secondary lining. In addition, the steel formwork trolley is in a closed environment during pouring, and the operability is relatively low. Most of the construction is based on the experience of the workers. Improper operation of the workers during the construction process is also an important influencing factor; second, improper selection of secondary lining materials will also cause cracking and falling of the lining; third, changes in the external environment temperature will cause relative changes in the volume of concrete materials, which will also have a certain impact on the vault debulking.
[0003] In view of the above three situations that may cause the secondary lining vault of the tunnel to be hollowed out, the common safety operation prevention measures are: strict inspection of the selected secondary lining materials, and try to choose to construct in an environment with little temperature change during the day during the construction process, and install the template trolley in place and provide technical training for the workers. Although the hollowing phenomenon of the secondary lining can be reduced to a certain extent in this process, more attention should be paid to dynamic monitoring and prevention during the construction process to minimize the hollowing phenomenon as much as possible. At present, the common method is to arrange distributed compaction sensors between the initial support and the waterproof board, so as to monitor the compaction state of different vault positions in the longitudinal direction. Grouting on this basis can achieve good results, but the commonly used method is to arrange radial grouting pipes on the lining trolley at intervals along the longitudinal direction of the tunnel. The number is small and the intervals are long. When the hollowing position is far away from the slurry outlet, a large pressure is required to make the slurry flow to the hollowing position. Excessive pressure will cause waste of slurry and may also block other pipelines in the tunnel, causing new defects; on the other hand, the lining trolley is subjected to excessive pressure load, which may cause the trolley to deform or even break, causing quality and safety problems. Therefore, how to accurately fill the voids in the tunnel lining based on the dynamic monitoring results of the lining casting density is an important issue that needs to be solved to eliminate voids in the tunnel lining. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a tunnel secondary lining anti-voiding precise grouting equipment.
[0005] The utility model provides a tunnel secondary lining anti-cavitation precise grouting equipment adopts the following technical solutions:
[0006] A precise grouting device for preventing degassing of a secondary lining of a tunnel comprises a degassing grouting pipe, a guide wheel, a graduated hose reel, a rigid connecting pipe, a pressure gauge, a pressure gauge switch valve and a pressure sensor, wherein the graduated hose reel is mounted on a lining trolley frame, a telescopic device is arranged at the edge of the lining trolley frame, the guide wheel is arranged on the top of the telescopic device, the rigid connecting pipe is arranged between the tail end of the degassing grouting pipe and a slurry supply pipe, the pressure gauge and the pressure gauge switch valve are arranged on the rigid connecting pipe, the degassing grouting pipe is wound around the graduated hose reel, the head end of the degassing grouting pipe is mounted below a waterproof board through a guide wheel, a pressure sensor is laid along the longitudinal direction of the tunnel between the waterproof board and the initial support of the tunnel, and in the initial state, the slurry outlet at the head end of the degassing grouting pipe is arranged at the end of the secondary lining of the tunnel that has been cast in the previous mold.
[0007] Optionally, the graduated hose reel is mounted on the middle of the outer side of the lining trolley frame via a fixed support.
[0008] Optionally, a quick connector is provided in the middle of the graduated hose reel, and the quick connector is used to connect to the de-hollowing grouting pipe.
[0009] Optionally, a revolution counter is provided in the middle of the rotating wheel of the graduated hose reel.
[0010] Optionally, the guide wheel is fixed to the movable end of the telescopic device of the lining trolley frame.
[0011] Optionally, the pressure gauge and the pressure gauge switch valve are arranged on a rigid connecting pipe, and the rigid connecting pipe is located between the tail end of the de-hollowing grouting pipe and the slurry supply pipe.
[0012] Optionally, the outer contour of the pressure gauge has a zero reset adjustment device.
[0013] Optionally, the pressure sensor is a distributed pressure sensor, and the distributed pressure sensor is evenly arranged between the initial support and the waterproof board.
[0014] Optionally, the hollow grouting pipe cloth is arranged below the waterproof board and at a position corresponding to the top of the secondary lining.
[0015] Optionally, the de-hollowing grouting pipe is radially limited and arranged on the waterproof board by a fixing belt.
[0016] In summary, the utility model includes at least one of the following beneficial technical effects: the degassing grouting pipe is arranged on the waterproof board of the lining vault along the longitudinal direction of the tunnel. After the initial pouring of the secondary lining is completed, the possible degassing position can be determined according to the monitoring results of the indicator light of the distributed compaction sensor, and the grouting outlet of the degassing grouting pipe is located at the degassing position by using the graduated hose reel, guide wheel and fixing belt, so as to carry out accurate and fast grouting, and finally the monitoring results of the pressure gauge and the distributed compaction sensor are reflected to ensure whether the degassing position is dense. The advantage of using this equipment is that the accuracy of grouting is improved without the need for excessive grouting pressure, which can effectively avoid the deformation of the template and the waste of slurry caused by excessive grouting pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a cross-sectional schematic diagram of the utility model;
[0018] Figure 2 This is a diagram of the grouting state of the vault of the utility model after it is hollowed out.
[0019] Explanation of the reference numerals in the accompanying drawings: 1. Initial support; 2. Distributed compaction sensor; 3. Waterproof board; 4. Fixing belt; 5. Voided part; 6. Secondary lining; 7. Voided grouting pipe; 8. Guide wheel; 9. Lifting and retracting equipment; 10. Lining trolley frame; 11. Calibrated hose reel; 12. Rigid connecting pipe; 13. Pressure gauge; 14. Pressure switch valve; 15. Secondary lining template; 16. Slurry supply pipe. DETAILED DESCRIPTION
[0020] The following is combined with Figure 1-2 The utility model is described in further detail.
[0021] The utility model embodiment discloses a tunnel secondary lining anti-cavitation precise grouting device.
[0022] Reference Figure 1 and Figure 2 A tunnel secondary lining anti-emptying precise grouting equipment includes an emptying grouting pipe 7, a guide wheel 8, a calibrated hose reel 11, a rigid connecting pipe 12, a pressure gauge 13, a pressure gauge switch valve 14 and a pressure sensor 2. The calibrated hose reel 11 is installed on a lining trolley frame 10. A quick connector is provided in the middle of the calibrated hose reel 11. One end of the quick connector is connected to the emptying grouting pipe 7, and the other end is connected to the rigid connecting pipe 12.
[0023] The de-hollowing grouting pipe 7 is laid on the waterproof board of the lining vault along the longitudinal direction of the tunnel. After the initial pouring of the secondary lining is completed, the possible de-hollowing position 5 can be determined according to the monitoring result of the indicator light of the distributed compaction sensor 2, and the grouting outlet of the de-hollowing grouting pipe is located at the de-hollowing position by using the scaled hose reel 11, the guide wheel 8 and the fixing belt 4, so as to carry out accurate and fast grouting, and finally the pressure gauge 13 and the monitoring result of the distributed compaction sensor 2 are reflected to ensure whether the de-hollowing position 5 is dense. The advantage of using this equipment is that the accuracy of grouting is improved without excessive grouting pressure, which can effectively avoid the deformation of the template and the waste of slurry caused by excessive grouting pressure.
[0024] In the initial state, the hollow grouting pipe 7 is arranged longitudinally along the tunnel, the slurry outlet at the head end of the hollow grouting pipe 7 is set at the end of the secondary lining of the tunnel that has been cast in the previous mold, and is fixed by the fixing belt 4, the guide wheel 8 is installed on the top of the telescopic device at the edge of the lining trolley frame, the head end of the hollow grouting pipe 7 is installed under the waterproof board 3 through the guide wheel 8, the hollow grouting pipe 7 is installed on the calibrated hose reel 11, the rigid connecting pipe 12 is between the tail end of the hollow grouting pipe 7 and the slurry supply pipe 16, and is connected to the pressure gauge 13. When the indicator light of the pressure sensor 2 at the corresponding position of the arch does not meet the standard, it indicates that the slurry supply here is in an unsaturated state and there may be a phenomenon of degassing. The slurry supply pipe 16 is a rubber grouting pipe commonly used in engineering. The slurry supply pipe 16 is connected to the grouting machine to transport the slurry with a certain pressure to the degassing grouting pipe 7. The corresponding degassing grouting pipe length is adjusted by the graduated hose reel 11, and then the degassing grouting pipe 7 is guided to the corresponding degassing position 5 for grouting by the guiding effect of the guide wheel 8 and the fixing belt 4. The pressure gauge 13 and the pressure gauge switch valve 14 are installed on the rigid connecting pipe 12. The pressure gauge accuracy is 0.01MPa. Before grouting, open the switch valve 14 of the pressure gauge 13. When the index of the pressure gauge 13 reaches 1MPa (±0.1MPa) or the monitoring result of the distributed sensor 2 shows saturation, it indicates that the grouting at the degassing position 5 is relatively full, ensuring the density of the entire lining arch. At this time, the grouting machine can be closed for grouting. The advantage of using this equipment is that the accuracy of grouting is improved without the need for excessive grouting pressure, which can effectively avoid template deformation and slurry waste caused by excessive grouting pressure.
[0025] A pressure sensor is laid along the longitudinal direction of the tunnel between the waterproof board 3 and the initial support 1 of the tunnel. The pressure sensor is a distributed compaction sensor 2. In the initial state, the hollow grouting pipe 7 is arranged along the longitudinal direction of the tunnel. The grouting outlet at the head end of the hollow grouting pipe 7 is set at the end of the tunnel secondary lining 6 that has been cast in the previous mold and fixed by the fixing belt 4. The hollow grouting pipe 7 is an aluminum-plastic pipe, a plastic pipe or a rubber pipe. The hollow grouting pipe 7 is radially limited on the waterproof board 3 by the fixing belt 4, so that the hollow grouting pipe 7 can be suspended on the waterproof board 3 and can be twitched in the axial direction.
[0026] The guide wheel 8 is fixed to the movable end of the telescopic device 9, and the fixed end of the telescopic device 9 is on the lining trolley frame 10. In the present embodiment, the telescopic device 9 can be in the form of a spiral sleeve or a hydraulic cylinder. In the present embodiment, the spiral sleeve can push the guide wheel up and down to adjust the position of the guide wheel 8. The guide wheel 8 is installed on the top of the telescopic device at the edge of the lining trolley frame 10, and the head end of the hollow grouting pipe 7 is installed under the waterproof board through the guide wheel, and the hollow grouting pipe 7 is installed on the scale hose reel 11. In the present embodiment, the scale hose reel 11 adopts a commonly used industrial hose reel, which can automatically or manually retract and release the hollow grouting pipe, which will not be described in detail here. The outer diameter of the rotating wheel of the graduated hose reel 11 is engraved with dimensions, and there is a revolution counter in the middle of the rotating wheel of the graduated hose reel 11. The position of the slurry outlet of the de-aired grouting pipe 7 reaching the de-aired part 5 can be accurately adjusted according to the position transmitted by the pressure sensor to ensure the accuracy of grouting. The position of the slurry outlet of the de-aired grouting pipe reaching can be accurately adjusted to ensure the accuracy of grouting without excessive grouting pressure, which can effectively avoid deformation of the lining trolley and overflow and waste of slurry.
[0027] In this embodiment, the hollowing grouting pipe is an aluminum-plastic pipe, a plastic pipe or a rubber pipe. The hollowing grouting pipe 7 is radially limited on the waterproof board by the fixing belt 4, so that the hollowing grouting pipe can be suspended on the waterproof board and can be twitched in the axial direction.
[0028] The de-hollowing grouting pipe 7 is laid on the waterproof board of the lining vault along the longitudinal direction of the tunnel. After the initial pouring of the secondary lining is completed, the possible de-hollowing position 5 can be determined according to the monitoring result of the indicator light of the distributed compaction sensor 2, and the grouting outlet of the de-hollowing grouting pipe is located at the de-hollowing position by using the scaled hose reel 11, the guide wheel 8 and the fixing belt 4, so as to carry out accurate and fast grouting, and finally the pressure gauge 13 and the monitoring result of the distributed compaction sensor 2 are reflected to ensure whether the de-hollowing position 5 is dense. The advantage of using this equipment is that the accuracy of grouting is improved without excessive grouting pressure, which can effectively avoid the deformation of the template and the waste of slurry caused by excessive grouting pressure.
[0029] The rigid connecting pipe 12 is between the tail end of the hollow grouting pipe 7 and the slurry supply pipe, and is connected to a pressure gauge 13. When the indicator light of the pressure sensor at the corresponding position of the arch does not reach the standard, it indicates that the slurry supply here is in an unsaturated state and there may be a hollow phenomenon.
[0030] The slurry supply pipe 16 is a rubber grouting pipe commonly used in engineering projects. The slurry supply pipe is connected to the grouting machine to transport slurry with a certain pressure to the de-hollowed grouting pipe 7. The graduated hose reel 11 is used to adjust the corresponding de-hollowed grouting pipe length, and then the de-hollowed grouting pipe 7 is guided to the corresponding de-hollowed position for grouting by the guiding effect of the guide wheel 8 and the fixing belt 4, so that the slurry is filled on the secondary lining formwork 15. The pressure gauge 13 and the pressure gauge switch valve 14 are installed on the rigid connecting pipe 12.
[0031] The pressure gauge has an accuracy of 0.01MPa. Before grouting, open the switch valve of the pressure gauge. When the index of the pressure gauge 13 reaches 1MPa (±0.1MPa) or the monitoring result of the distributed sensor 2 shows saturation, it indicates that the grouting of the empty position is relatively full, ensuring the compactness of the entire lining vault. At this time, the grouting machine can be turned off for grouting. Repeat the above work, grouting the empty parts 5 one by one, and finally make the top of the secondary lining 6 completely compact. The advantage of using this equipment is that the accuracy of grouting is improved without the need for excessive grouting pressure, which can effectively avoid the deformation of the secondary lining formwork 15 and the waste of slurry caused by excessive grouting pressure.
[0032] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A tunnel secondary lining anti-cavitation precision grouting equipment, characterized by: It includes a degassing grouting pipe, a guide wheel, a graduated hose reel, a rigid connecting pipe, a pressure gauge, a pressure gauge switch valve and a pressure sensor. The graduated hose reel is installed on a lining trolley frame. A telescopic device is arranged at the edge of the lining trolley frame. The guide wheel is arranged on the top of the telescopic device. The rigid connecting pipe is arranged between the tail end of the degassing grouting pipe and the slurry supply pipe. The pressure gauge and the pressure gauge switch valve are arranged on the rigid connecting pipe. The degassing grouting pipe is wound around the graduated hose reel. The head end of the degassing grouting pipe is installed below a waterproof board through a guide wheel. A pressure sensor is laid along the longitudinal direction of the tunnel between the waterproof board and the initial support of the tunnel. In the initial state, the slurry outlet at the head end of the degassing grouting pipe is arranged at the end of the secondary lining of the tunnel that has been cast in the previous mold.
2. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The graduated hose reel is mounted on the middle part of the outer side of the lining trolley frame through a fixed support.
3. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 2 is characterized by: A quick connector is provided in the middle of the graduated hose reel, and one end of the quick connector is connected to the hollowing grouting pipe.
4. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 3 is characterized by: The outer diameter of the rotating wheel of the graduated hose reel is engraved with dimensions, and a revolution counter is arranged in the middle of the rotating wheel of the graduated hose reel.
5. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The guide wheel is fixed on the movable end of the telescopic device of the lining trolley frame.
6. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The pressure gauge and the pressure gauge switch valve are installed on a rigid connecting pipe, and the rigid connecting pipe is located between the tail end of the de-hollowing grouting pipe and the slurry supply pipe to play a connecting role.
7. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 6 is characterized by: The outer contour of the pressure gauge body is provided with a zero reset adjustment device.
8. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The pressure sensor is a distributed pressure sensor, which is evenly arranged between the initial support and the waterproof board.
9. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The de-hollowing grouting pipe is arranged below the waterproof board and at a position corresponding to the top of the secondary lining.
10. The tunnel secondary lining anti-cavitation precise grouting equipment according to claim 1 is characterized by: The hollow grouting pipe is radially limited and controlled on the waterproof board by a fixing belt.