A grouting system and its grouting method

Abstract

The embodiments of the present application provide a grouting system and a grouting method thereof. Since the grouting pump is connected to the three-way valve, the three-way valve is connected to the slurry supply device, the grouting parameter monitoring unit is connected to the three-way valve, and the grouting parameter monitoring unit is connected to the grouting hole mouth pipe through the quick-change device, the disassembly and assembly efficiency of the pipelines between the devices can be improved, the construction period can be shortened, and the cost can be reduced. The grouting parameter monitoring unit can monitor the grouting parameters between the three-way valve and the grouting hole mouth pipe, and the segment deformation monitoring unit can monitor the deformation amount of the segments of the tunnel. Therefore, targeted grouting can be carried out according to the monitored grouting parameters and the deformation amount of the segments, avoiding damage to the segments during the grouting process and having a good grouting effect.

Description

1.1.1 Technical Field

[0002] This application relates to the field of rail transit infrastructure construction, and particularly to a grouting system and a grouting method thereof. 1.1.2 Background Art

[0004] Urban rail transit has great advantages in relieving the traffic pressure in the city center and promoting the economic development of the surrounding areas of the city. At present, a large part of the operating subways will inevitably pass through poor geological conditions such as silt, silty soil, and fine silt sand. At present, such subway shield tunnels are prone to diseases such as water leakage, segment cracking and falling blocks, longitudinal settlement of the tunnel, and circumferential convergence deformation of the pipe diameter; and grouting reinforcement, as an effective treatment measure, is widely used.

[0005] There are mainly two existing grouting processes for operating shield tunnels: ground grouting outside the tunnel and post-grouting behind the lining inside the tunnel. Due to the limitations of geological conditions, urban areas, operation time and other conditions for ground grouting outside the tunnel, there are great limitations. Therefore, post-grouting measures behind the lining inside the tunnel are often used for the treatment of diseases in operating subway tunnels. However, the grouting process inside the tunnel is complicated, the disassembly and assembly efficiency of the grouting system is low, the construction period is long, and the cost is high; the grouting state is not effectively monitored, and the segments are easily damaged during the grouting process, and it is difficult to ensure the grouting effect. 1.1.3 Summary of the Invention

[0007] In view of this, the embodiments of this application are expected to provide a grouting system and a grouting method thereof to improve the disassembly and assembly efficiency, reduce the construction period and cost, and monitor the grouting state to avoid segment damage during the grouting process.

[0008] To achieve the above object, on the one hand, the embodiments of this application provide a grouting system for tunnel deformation treatment, including:

[0009] A slurry supply device for caching the slurry required for grouting;

[0010] A slurry delivery device that pumps out the slurry required for grouting from the slurry supply device. The slurry delivery device includes a grouting pump, a three-way valve, and a grouting orifice pipe. The inlet of the three-way valve is connected to the grouting pump, and the two outlets of the three-way valve are respectively connected to the slurry supply device and the grouting orifice pipe;

[0011] A data acquisition device, including a grouting parameter monitoring unit, a segment deformation monitoring unit, and a data processing device. The grouting parameter monitoring unit and the segment deformation monitoring unit are both communicatively connected to the data processing device. The grouting parameter monitoring unit is connected between the three-way valve and the grouting orifice pipe to obtain grouting parameters, and the segment deformation monitoring unit is arranged on the segments of the tunnel to obtain the deformation amount of the segments; and

[0012] Quick-change device, and the quick-change device is used to connect between the grouting pump and the three-way valve, between the three-way valve and the slurry supply equipment, between the grouting parameter monitoring unit and the three-way valve, and between the grouting parameter monitoring unit and the grouting hole pipe.

[0013] In one embodiment, the grouting parameter monitoring unit includes a first pressure detection device, a flowmeter, and a first measuring pipe. The first measuring pipe is connected between the three-way valve and the grouting hole pipe. The flowmeter and the first pressure detection device are both arranged on the first measuring pipe, and the flowmeter and the first pressure detection device are both communicatively connected to the data processing device.

[0014] In one embodiment, the first pressure detection device includes a first pressure gauge, a first oil-slurry isolator, a pressure sensor, and a second oil-slurry isolator. The first pressure gauge is connected to the first measuring pipe through the first oil-slurry isolator, the pressure sensor is connected to the first measuring pipe through the second oil-slurry isolator, and the pressure sensor is communicatively connected to the data processing device.

[0015] In one embodiment, the grouting parameter monitoring unit further includes a second pressure detection device arranged on the grouting hole pipe. The second pressure detection device includes a second pressure gauge and a third oil-slurry isolator. The second pressure gauge is connected to the grouting hole pipe through the third oil-slurry isolator.

[0016] In one embodiment, the slurry supply equipment further includes an auxiliary material pump and a mixer. One inlet of the mixer is connected to one outlet of the three-way valve, another inlet of the mixer is connected to the auxiliary material pump, and the outlet of the mixer is connected to the grouting parameter monitoring unit; the auxiliary material pump is used for pumping sodium silicate.

[0017] In one embodiment, the quick-change device includes a first pipe joint, a second pipe joint, a locking member, and multiple sections of conveying pipes. A groove is formed on the outer part of the first pipe joint, and the locking member is formed with a locking portion. The shape of the locking portion is adapted to the shape of the groove.

[0018] The first pipe joint, the second pipe joint, and the locking member are arranged between two adjacent sections of conveying pipes. The first pipe joint is connected to one section of the conveying pipe, the locking member is rotatably connected to the second pipe joint, and the second pipe joint is connected to another section of the conveying pipe; when the first pipe joint is located inside the second pipe joint, the locking portion rotates into the groove to connect the first pipe joint and the second pipe joint, or the locking portion rotates out of the groove to disconnect the first pipe joint and the second pipe joint.

[0019] In one embodiment, the grouting system further includes a waste slurry bucket and a first valve, and the grouting orifice pipe is selectively communicated with the waste slurry bucket through the first valve.

[0020] In one embodiment, the number of the grouting orifice pipes is multiple, and the multiple grouting orifice pipes are connected in parallel with each other; a grouting parameter monitoring unit is arranged between the three-way valve and each grouting orifice pipe, and the multiple grouting parameter monitoring units are connected in parallel with each other.

[0021] In the second aspect of the embodiments of the present application, a grouting method is provided, which is applied to any one of the corresponding grouting systems described above. The grouting method includes the following steps:

[0022] Obtain the grouting parameters, the initial deformation amount of the segment, and the current deformation amount of the segment;

[0023] Divide the entire ring of segments in the tunnel width direction into regions according to the magnitude of the initial deformation amount, and start grouting for the divided regions in sequence according to the order from large to small of the initial deformation amount;

[0024] When any one of the regions meets the grouting stop condition, stop grouting for the region, and the grouting stop condition is determined according to the grouting parameters and / or the deformation increment of the segment.

[0025] In one embodiment, the grouting parameter monitoring unit includes a first pressure detection device, a flowmeter, and a first measuring pipe. The first measuring pipe is connected between the three-way valve and the grouting orifice pipe. The flowmeter and the first pressure detection device are both arranged on the first measuring pipe, and the flowmeter and the first pressure detection device are both communicatively connected with the data processing device; the grouting parameters include the pressure measured by the first pressure detection device and the flow rate measured by the flowmeter;

[0026] When the pressure measured by the first pressure detection device exceeds the pressure preset value, or the flow rate measured by the flowmeter is less than the average flow rate of the grouting pump, check the blockage condition of the corresponding grouting orifice pipe and between the corresponding grouting orifice pipe and the grouting pump;

[0027] When there is no blockage in the corresponding grouting orifice pipe and between the corresponding grouting orifice pipe and the grouting pump, stop grouting for the corresponding grouting orifice;

[0028] When there is a blockage in the corresponding grouting orifice pipe or between the corresponding grouting orifice pipe and the grouting pump, unblock the corresponding pipeline and then continue grouting.

[0029] In one embodiment, for any region, the condition for starting grouting in this region is:

[0030] A judgment area set is established. The initial deformation amount of the segment in each area of the judgment area set is greater than the initial deformation amount of this area. When the current deformation amount of the segment in one area of the judgment area set is equal to the initial deformation amount of this area, grouting starts in this area.

[0031] In the grouting system of the embodiment of the present application, since the grouting pump and the three-way valve, the three-way valve and the grout supply equipment, the grouting parameter monitoring unit and the three-way valve, and the grouting parameter monitoring unit and the grouting hole pipe are all connected through the quick-change device, the disassembly and assembly efficiency of the pipelines between the devices can be improved, the construction period can be shortened, and the cost can be reduced. The grouting parameter monitoring unit can monitor the grouting parameters between the three-way valve and the grouting hole pipe, and the segment deformation monitoring unit can monitor the deformation amount of the segments of the tunnel. Therefore, targeted grouting can be carried out according to the monitored grouting parameters and the deformation amount of the segments, avoiding damage to the segments during the grouting process, and having a good grouting effect. 1.1.4 Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of a grouting system according to an embodiment of the present application. The shown grouting system does not include an auxiliary material pump and a mixer;

[0034] Figure 2 It is a schematic structural diagram of a grouting system according to an embodiment of the present application. The shown grouting system includes an auxiliary material pump and a mixer;

[0035] Figure 3 It is a schematic structural diagram of a grouting system according to an embodiment of the present application. The figure shows the structure of multiple grouting hole pipes connected in parallel;

[0036] Figure 4 It is a schematic structural diagram of a quick-change device according to an embodiment of the present application. The conveying pipe is not shown in the figure;

[0037] Figure 5 is Figure 4 The cross-sectional view at position A-A in, the figure only shows the relative positions of the pipe wall of the second joint and the locking member, and the protruding part rotatably connected to the locking member on the second joint is not shown in the figure.

[0038] Description of reference numerals: slurry supply device 1; slurry delivery device 2; grouting pump 21; three-way valve 22; grouting hole pipe 23; auxiliary material pump 24; mixer 25; feeding pipe 251; mixing pipe 252; data acquisition device 3; grouting parameter monitoring unit 31; first pressure detection device 311; first pressure gauge 3111; first oil-slurry isolator 3112; pressure sensor 3113; second oil-slurry isolator 3114; flowmeter 312; first measuring pipe 313; second pressure detection device 314; second pressure gauge 3141; third oil-slurry isolator 3142; quick-change device 4; first pipe joint 41; groove 411; second pipe joint 42; locking member 43; locking portion 431; lock head 432; handle 433; pull ring 434; waste slurry bucket 5; first valve 6. 1.1.5 Specific implementation mode

[0040] It should be noted that, without conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. The detailed description in the specific implementation mode should be understood as an explanatory illustration of the purpose of this application and should not be regarded as an improper limitation of this application.

[0041] The multi-point synchronous grouting described in this application refers to grouting multiple grouting holes, but the start and end times are not completely synchronous. The start and end times of some grouting holes may be earlier, and the start and end times of some grouting holes may be later, but within a certain period, multiple grouting holes are in the grouting state.

[0042] One aspect of the embodiment of this application provides a grouting system. Please refer to Figure 1 , the grouting system is used for tunnel deformation rectification. The grouting system includes a slurry supply device 1, a slurry delivery device 2, a data acquisition device 3, and a quick-change device 4. The slurry supply device 1 is used to cache the slurry required for grouting. The slurry delivery device 2 pumps out the slurry required for grouting from the slurry supply device 1. The slurry delivery device 2 includes a grouting pump 21, a three-way valve 22, and a grouting hole pipe 23. The inlet of the three-way valve 22 is connected to the grouting pump 21, and the two outlets of the three-way valve 22 are respectively connected to the slurry supply device 1 and the grouting hole pipe 23. The data acquisition device 3 includes a grouting parameter monitoring unit 31, a segment deformation monitoring unit, and a data processing device. The grouting parameter monitoring unit 31 and the segment deformation monitoring unit are both communicatively connected to the data processing device. The grouting parameter monitoring unit 31 is connected between the three-way valve 22 and the grouting hole pipe 23 to obtain grouting parameters, and the segment deformation monitoring unit is arranged on the segments of the tunnel to obtain the deformation amount of the segments. The grouting pump 21 and the three-way valve 22, the three-way valve 22 and the slurry supply device 1, the grouting parameter monitoring unit 31 and the three-way valve 22, and the grouting parameter monitoring unit 31 and the grouting hole pipe 23 are all connected through the quick-change device 4.

[0043] Since the grouting pump 21 and the three-way valve 22, the three-way valve 22 and the slurry supply equipment 1, the grouting parameter monitoring unit 31 and the three-way valve 22, and the grouting parameter monitoring unit 31 and the grouting hole pipe 23 are all connected by the quick-change device 4, the disassembly and assembly efficiency of the pipelines between the devices can be improved, the construction period can be shortened, and the cost can be reduced. The grouting parameter monitoring unit 31 can monitor the grouting parameters between the three-way valve 22 and the grouting hole pipe 23, and the segment deformation monitoring unit can monitor the deformation amount of the segments of the tunnel. Therefore, targeted grouting can be carried out according to the monitored grouting parameters and the deformation amount of the segments, the deformation of the segments can be better controlled, and the damage to the segments during the grouting process can be avoided, and a better grouting effect is achieved.

[0044] It can be understood that since the inlet of the three-way valve 22 is connected to the grouting pump 21 and one of the outlets of the three-way valve 22 is connected to the slurry supply equipment 1, a cycle is formed among the slurry supply equipment 1, the grouting pump 21 and the three-way valve 22. When the three-way valve 22 and the grouting hole pipe 23 are blocked, the slurry pumped out by the grouting pump 21 from the slurry supply equipment 1 can return to the slurry supply equipment 1 through the three-way valve 22, avoiding the situation where the grouting pump 21 continuously grouts into the grouting hole pipe 23 when the three-way valve 22 and the grouting hole pipe 23 are blocked and causing damage to the equipment.

[0045] In one embodiment, universal wheels are provided at the bottoms of both the slurry supply equipment 1 and the slurry delivery equipment 2, which is convenient for manual pushing and suitable for construction during the subway skylight period.

[0046] In one embodiment, please refer to Figure 3 , the number of the grouting hole pipes 23 of the grouting system is multiple, and the multiple grouting hole pipes 23 are connected in parallel. A grouting parameter monitoring unit 31 is provided between the three-way valve 22 and each grouting hole pipe 23, and the multiple grouting parameter monitoring units 31 are connected in parallel. In this way, it is equivalent to setting multiple branches for grouting, and each branch is provided with a grouting parameter monitoring unit 31 and a grouting hole pipe 23 for synchronous grouting of multiple grouting holes during the tunnel deformation rectification process. The multiple grouting hole pipes 23 are integrated in parallel in a set of systems, and the multiple grouting parameter monitoring units 31 are integrated in parallel in a set of systems, so that during the tunnel deformation rectification process, a set of grouting system can complete multi-point synchronous grouting, without the need to set multiple sets of grouting systems. The equipment for tunnel segment deformation rectification in the tunnel is relatively compact and the overall occupied space is small.

[0047] In one embodiment, please refer to Figure 2, the slurry feeding device 2 further includes an auxiliary material pump 24 and a mixer 25. One inlet of the mixer 25 is connected to one outlet of the tee, the other inlet of the mixer 25 is connected to the auxiliary material pump 24, and the outlet of the mixer 25 is connected to the grouting parameter monitoring unit 31. The auxiliary material pump 24 is used to pump sodium silicate. In this way, the sodium silicate and the slurry pumped out by the grouting pump 21 can be mixed to achieve double-fluid grouting.

[0048] In one embodiment, please refer to Figure 2 , the mixer 25 includes a feeding pipe 251 and a mixing pipe 252 connected to each other. The mixing pipe 252 is connected between the three-way valve 22 and the grouting parameter monitoring unit 31. The inlet connected to the auxiliary material pump 24 is formed on the feeding pipe 251, the inlet connected to the three-way valve 22 is formed on the mixing pipe 252, and the outlet connected to the grouting parameter monitoring unit 31 is formed on the mixing pipe 252.

[0049] In one embodiment, please refer to Figure 3 , a mixer 25 is provided between the three-way valve 22 and each grouting parameter monitoring unit 31, and multiple mixers 25 are connected in parallel. In this way, it is equivalent to having a mixer 25 corresponding to each branch for grouting corresponding to each grouting orifice pipe 23, which is used to mix the sodium silicate and the slurry pumped out by the grouting pump 21.

[0050] In one embodiment, it can also be that the three-way valve 22 of the grouting system corresponds to a grouting orifice pipe 23. During the tunnel deformation rectification process, multiple grouting systems are set up, and the grouting orifice pipes 23 of multiple grouting systems grout different grouting holes. Therefore, multiple grouting systems can be set up for synchronous grouting.

[0051] It can be understood that due to the low disassembly and assembly efficiency and the long construction period, during the process of setting up the conveying pipe for grouting, the disassembly and assembly of the conveying pipe are usually avoided as much as possible to shorten the construction period, which often makes the length of the conveying pipe for grouting relatively long, resulting in a greater possibility of pipe blockage and being unfavorable for synchronous grouting. In one embodiment, please refer to Figure 4 and Figure 5, the quick-change device 4 includes a first pipe joint 41, a second pipe joint 42, a locking member 43, and multiple sections of conveying pipes. A groove 411 is formed on the outer part of the first pipe joint 41, and the locking member 43 is formed with a locking portion 431, and the shape of the locking portion 431 is adapted to the shape of the groove 411. A first pipe joint 41, a second pipe joint 42, and a locking member 43 are arranged between two adjacent sections of conveying pipes. The first pipe joint 41 is connected to one section of the conveying pipe, the locking member 43 is rotatably connected to the second pipe joint 42, and the second pipe joint 42 is connected to another section of the conveying pipe; when the first pipe joint 41 is located inside the second pipe joint 42, the locking portion rotates into the groove 411 to connect the first pipe joint 41 and the second pipe joint 42, or the locking portion rotates out of the groove 411 to disconnect the first pipe joint 41 and the second pipe joint 42. In this way, the installation connection and disassembly of the conveying pipe can be quickly realized by rotating the locking joint, improving the disassembly and assembly efficiency between the various devices of the grouting system. The number of conveying pipes of the quick-change device 4 is multiple sections, and the conveying pipes can be quickly disassembled and assembled through the first pipe joint 41, the second pipe joint 42, and the locking member 43. In this way, the originally long conveying pipes between the grouting pipe and the three-way valve 22, between the three-way valve 22 and the slurry supply device 1, between the grouting parameter monitoring unit 31 and the three-way valve 22, and between the grouting parameter monitoring unit 31 and the grouting hole orifice pipe 23 can be replaced by multiple sections of shorter conveying pipes. Although the disassembly and assembly nodes of the conveying pipes increase, because the quick-change device 4 can disassemble and assemble the conveying pipes relatively quickly, improving the disassembly and assembly efficiency, the extra disassembly and assembly nodes will not have too much impact on the total construction period, and the too long pipes can be quickly disassembled and replaced, so that the length of the conveying pipe for grouting between the grouting pump 21 and the grouting hole is minimized, reducing the hidden danger of pipe blockage and facilitating the smooth multi-point synchronous grouting. Furthermore, compared with the prior art in which adjacent two conveying pipes are connected by a hoop, in the embodiment of the present application, after the first pipe joint 41 and the second pipe joint 42 are respectively connected to the corresponding conveying pipes, the first pipe joint 41 is inserted into the second pipe joint 42 and connected by the locking member 43, which has better sealing performance.

[0052] For example, single conveying pipes for grouting adopt different length specifications such as 2m, 3m, and 5m. The conveying pipes with different length specifications are quickly disassembled and assembled into the shortest grouting length required for grouting between the grouting pump 21 and the grouting hole, avoiding the risk of increased pipe blockage due to the too long conveying pipe between the grouting pump 21 and the grouting hole. The length of a single conveying pipe is short. Even if pipe blockage occurs, the blocked pipe part can be quickly found and replaced through the quick-change device 4.

[0053] In one embodiment, the length of the grouting hole orifice pipe 23 is less than or equal to 3m. In this way, the probability of pipe blockage can be reduced.

[0054] In one embodiment, please refer to Figure 4The locking member 43 includes a locking head 432 and a handle 433 connected to each other, the locking portion is formed on the locking head 432, and the locking head 432 is connected to the second pipe joint 42. The handle 433 is located on a side of the locking head 432 away from the second pipe joint 42.

[0055] In one embodiment, please refer to Figure 4 The locking member 43 also includes a pull ring 434 , which is connected to the handle 433 .

[0056] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The grouting parameter monitoring unit 31 includes a first pressure detection device 311, a flow meter 312 and a first measuring tube 313. The first measuring tube 313 is connected between the three-way valve 22 and the grouting orifice tube 23. The flow meter 312 and the first pressure detection device 311 are both arranged on the first measuring tube 313. The flow meter 312 and the first pressure detection device 311 are both connected to the data processing device for communication. In this way, the pressure of the slurry in the first measuring tube 313 is measured by the first pressure detection device 311, and the flow rate of the slurry in the first measuring tube 313 is measured by the flow meter 312. The first measuring tube 313 is closer to the grouting port than the grouting pump 21, which can reduce the influence of the pressure loss along the way on the measured grouting pressure. Therefore, the grouting pressure in the first grouting tube measured by the first pressure detection device 311 is closer to the real grouting pressure in the formation. The first pressure detection device 311 and the flow meter 312 are both communicatively connected to the data processing equipment, so as to facilitate centralized monitoring and processing of the pressure data measured by the first pressure detection device 311 and the flow data detected by the flow meter 312 .

[0057] In one embodiment, the first measuring tube 313 is a galvanized steel tube, and the delivery tube between the first measuring tube 313 and the grouting orifice tube 23 is a rubber tube or a silicone tube.

[0058] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3, the first pressure detection device 311 includes a first pressure gauge 3111, a first slurry isolator 3112, a pressure sensor 3113, and a second slurry isolator 3114. The first pressure gauge 3111 is connected to the first measuring pipe 313 through the first slurry isolator 3112, and the pressure sensor 3113 is connected to the first measuring pipe 313 through the second slurry isolator 3114. The pressure sensor 3113 is communicatively connected to the data processing device. In this way, the oil in the first slurry isolator 3112 isolates the slurry in the first measuring pipe 313 from the first pressure gauge 3111, preventing the slurry in the first measuring pipe 313 from entering the first pressure gauge 3111 and damaging it. Moreover, the pressure of the slurry in the first measuring pipe 313 can be transmitted to the first pressure gauge 3111 through the oil in the first slurry isolator 3112, enabling the first pressure gauge 3111 to measure the pressure of the slurry in the first measuring pipe 313. The oil in the second slurry isolator 3114 isolates the slurry in the first measuring pipe 313 from the pressure sensor 3113, preventing the slurry in the first measuring pipe 313 from entering the pressure sensor 3113 and damaging it. Also, the pressure of the slurry in the first measuring pipe 313 can be transmitted to the pressure sensor 3113 through the oil in the second slurry isolator 3114, enabling the pressure sensor 3113 to measure the pressure of the slurry in the first measuring pipe 313. The data of the first pressure gauge 3111 and the pressure sensor 3113 can be used for mutual comparison. Usually, the data of the first pressure sensor 3113 is uploaded to the data processing device for centralized monitoring and processing.

[0059] In one embodiment, the first pressure gauge 3111 can be a mechanical pressure gauge.

[0060] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 , the grouting parameter monitoring unit 31 further includes a second pressure detection device 314 provided on the grouting orifice pipe 23. The second pressure detection device 314 includes a second pressure gauge 3141 and a third slurry isolator 3142. The second pressure gauge 3141 is connected to the grouting orifice pipe 23 through the third slurry isolator 3142. In this way, the position of the second pressure detection device 314 is closer to the grouting hole than that of the first pressure detection device 311, and the grouting pressure measured by the second pressure detection device 314 is closer to the true grouting pressure of the formation. The oil in the third slurry isolator 3142 isolates the second pressure gauge 3141 from the grouting orifice pipe 23, preventing the slurry in the grouting orifice pipe 23 from entering the second pressure gauge 3141 and damaging it. The pressure of the slurry in the grouting orifice pipe 23 is transmitted to the second pressure gauge 3141 through the oil in the third slurry isolator 3142, enabling the second pressure gauge 3141 to measure the pressure of the slurry in the grouting orifice pipe 23.

[0061] In one embodiment, the second pressure gauge 3141 can be a mechanical pressure gauge.

[0062] In one embodiment, the segment deformation monitoring unit includes a strain gauge sensor, a prism, and a displacement sensor. The strain gauge sensor and the prism are both arranged on the segment, and the displacement sensor is arranged at the joint position of two adjacent segments. The deformation of the segment is comprehensively monitored through the position settings of the strain gauge sensor, the prism, and the displacement sensor. The strain gauge is sensitive to deformation and has high measurement accuracy. It is attached to the surface of the segment, which is beneficial to the measurement of the deformation of the segment. It is not convenient to set the strain gauge at the joint position between adjacent segments, and the telescopic deformation amount at the joint may be relatively large, so it is not suitable to use the strain gauge for measurement. Therefore, a displacement sensor is arranged at the joint position of two adjacent segments to monitor the deformation amount of the segment. The prism arranged on the segment can also cooperate with the total station to measure the deformation amount of the segment.

[0063] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the grouting system further includes a waste slurry bucket 5 and a first valve 6. The grouting orifice pipe 23 is selectively connected to the waste slurry bucket 5 through the first valve 6. In this way, after the grouting is stopped, the first valve 6 can be opened to discharge the residual slurry between the grouting pump 21 and the grouting orifice pipe 23 into the waste slurry bucket 5, avoiding the hardening and blocking of the slurry in the conveying pipe.

[0064] The second aspect of the embodiments of the present application provides a grouting method. The grouting method is applied to any one of the above corresponding grouting systems. The grouting method includes the following steps:

[0065] Obtain the grouting parameters, the initial deformation amount of the segment, and the current deformation amount of the segment;

[0066] Divide the entire ring of segments in the tunnel width direction into regions according to the magnitude of the initial deformation amount, and start grouting for the divided regions in sequence according to the order from large to small of the initial deformation amount;

[0067] When any region meets the grouting stop condition, stop grouting for the region. The grouting stop condition is determined according to the grouting parameters and / or the deformation increment of the segment.

[0068] This method controls the grouting time sequence of each region with different deformation amounts, and can better control the overall deformation of the segment during the process of rectifying the deformation of the segment by grouting, improving the deformation rectification accuracy of the segment.

[0069] In one embodiment, for any region, the condition for starting grouting in this region is:

[0070] A set of judgment regions is established. The initial deformation amount of the segments in each region of the set of judgment regions is greater than the initial deformation amount of that region. When the current deformation amount of the segments in one of the regions of the set of judgment regions is equal to the initial deformation amount of that region, grouting starts in that region.

[0071] Specifically, for example, the entire ring of segments in the tunnel width direction is divided into Region A, Region B, and Region C. Among them, the initial deformation amount of the segments in Region A is 5 mm, the initial deformation amount of the segments in Region B is 3 mm, and the initial deformation amount of the segments in Region C is 1 mm. First, grout the grouting holes corresponding to Region A with a larger initial deformation amount to gradually reduce the deformation amount of the segments in Region A. When the deformation amount of the segments in Region A is reduced to a current deformation amount of 3 mm, start grouting the grouting holes in Region B to gradually reduce the deformation amount of the segments in Region B. Since Region A has not reached the condition for stopping grouting, grouting will continue and the deformation amount will continue to decrease. During this process, the deformation amounts of Region A and Region B are basically the same. When the deformation amount of Region B is reduced to a current deformation amount of 1 mm, start grouting the grouting holes in Region C. At this time, the deformation amount of Region A has also been reduced to about 1 mm.

[0072] In one embodiment, the condition for stopping grouting is determined according to grouting parameters and / or the deformation increment of the segments. The grouting parameters include grouting pressure. Exemplarily, the warning value of the grouting pressure is 5 Mpa. When the grouting pressure is greater than or equal to 5 Mpa, stop grouting. The deformation increment of the segments refers to the absolute value of the current deformation amount of the segments minus the initial deformation amount of the segments. Exemplarily, when the single - time deformation increment of the segments reaches 5 mm or the cumulative deformation increment of the segments reaches 2 cm, stop grouting. Specifically, for example, the initial deformation amount of a certain segment is 7 mm. After a certain grouting, the current deformation amount of the segment is reduced to 2 mm. The deformation increment of the segment is 5 mm. Although the segment still has a small amount of deformation, since the single - time deformation increment of the segment reaches 5 mm, stop grouting. The remaining 2 - mm deformation amount will gradually decrease to 0 mm during the grouting rectification process the next day. Thus, the deformation of the segments can be rectified more accurately and excessive deformation of the segments can be avoided.

[0073] In one embodiment, when the pressure measured by the first pressure detection device 311 exceeds the pressure preset value, or the flow rate measured by the flowmeter 312 is less than the average flow rate of the grouting pump 21, check the blockage condition of the corresponding grouting hole pipe 23 and the blockage condition between the corresponding grouting hole pipe 23 and the grouting pump 21;

[0074] When there is no blockage in the corresponding grouting hole pipe 23 and between the corresponding grouting hole pipe 23 and the grouting pump 21, stop grouting the corresponding grouting hole;

[0075] When there is a blockage in the corresponding grouting hole pipe 23 or between the corresponding grouting hole pipe 23 and the grouting pump 21, continue grouting after dredging the corresponding pipeline.

[0076] Specifically, for example, when the pressure measured by the first pressure detection device 311 exceeds the pressure preset value of 5 Mpa, check the blockage condition of the corresponding grouting orifice pipe 23 and between the corresponding grouting orifice pipe 23 and the grouting pump 21, and take the corresponding measures as described above.

[0077] In one embodiment, near the end of the grouting operation, reasonably control the amount of slurry mixing according to the grouting flow rate to avoid generating too much surplus slurry; after the grouting is completed, appropriately clean the slurry supply equipment 1, the slurry delivery equipment 2 and the pipelines, and the grouting system can be quickly disassembled through the quick-change device 4.

[0078] The various embodiments / implementation manners provided in this application can be combined with each other without contradiction.

[0079] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A grouting method for a grouting system, characterized in that The grouting method includes the following steps: Obtain grouting parameters, the initial deformation of the segment, and the current deformation of the segment; Divide the entire ring of segments in the tunnel width direction into regions according to the magnitude of the initial deformation, and start grouting for the divided regions in order from the largest to the smallest initial deformation. For any region, the condition for starting grouting in this region is: establish a judgment region set, and the initial deformation of the segments in each region in the judgment region set is greater than the initial deformation of this region. When the current deformation of the segments in one of the regions in the judgment region set is equal to the initial deformation of this region, grouting in this region starts; When any of the regions meets the grouting stop condition, stop grouting for the region, and the grouting stop condition is determined according to the grouting parameters and / or the deformation increment of the segment.

2. The grouting method of the grouting system according to claim 1, characterized in that, The grouting system includes: A slurry supply device for caching the slurry required for grouting; A slurry delivery device that pumps out the slurry required for grouting from the slurry supply device. The slurry delivery device includes a grouting pump, a three-way valve, and a grouting orifice pipe. The inlet of the three-way valve is connected to the grouting pump, and the two outlets of the three-way valve are respectively connected to the slurry supply device and the grouting orifice pipe; A data acquisition device, including a grouting parameter monitoring unit, a segment deformation monitoring unit, and a data processing device. The grouting parameter monitoring unit and the segment deformation monitoring unit are both communicatively connected to the data processing device. The grouting parameter monitoring unit is connected between the three-way valve and the grouting orifice pipe to obtain grouting parameters, and the segment deformation monitoring unit is arranged on the segments of the tunnel to obtain the deformation of the segments. The deformation of the segments includes the initial deformation of the segments and the current deformation of the segments; and A quick-change device, and the grouting pump and the three-way valve, the three-way valve and the slurry supply device, the grouting parameter monitoring unit and the three-way valve, and the grouting parameter monitoring unit and the grouting orifice pipe are all connected through the quick-change device.

3. The grouting method of the grouting system according to claim 2, characterized in that The grouting parameter monitoring unit includes a first pressure detection device, a flowmeter, and a first measuring pipe. The first measuring pipe is connected between the three-way valve and the grouting orifice pipe, and the flowmeter and the first pressure detection device are both arranged on the first measuring pipe. The flowmeter and the first pressure detection device are both communicatively connected to the data processing device; the grouting parameters include the pressure measured by the first pressure detection device and the flow rate measured by the flowmeter; When the pressure measured by the first pressure detection device exceeds the pressure preset value, or the flow rate measured by the flowmeter is less than the average flow rate of the grouting pump, check the blockage condition of the corresponding grouting orifice pipe and the pipe between the corresponding grouting orifice pipe and the grouting pump; When there is no blockage in the corresponding grouting orifice pipe and the pipe between the corresponding grouting orifice pipe and the grouting pump, stop grouting the corresponding grouting hole; When there is a blockage in the corresponding grouting orifice pipe or the pipe between the corresponding grouting orifice pipe and the grouting pump, continue grouting after dredging the corresponding pipeline.

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