A synchronous double-liquid grouting system for ultra-large diameter shield

Abstract

The ultra-large diameter shield synchronous double-liquid grouting system provided by the present invention comprises a grouting unit with multiple grouting guns, a mixing unit with a mixer and a mixing pipe, and a flushing unit with a first flushing pipe and a flushing water tank. The first and second channels and a connecting cavity connected to the first and second channels are arranged in the grouting gun body, and a plug with a through flow channel is inserted in the connecting cavity, so that the through flow channel includes the first flow channel and the second flow channel connected therewith, the mixer has the first and second pipe sections and the mixing pipe section, the mixing pipe section is connected to the mixing pipe, the mixing pipe is inserted in the second channel and connected to the second flow channel, the first flushing pipe is slidably inserted in the first flow channel along the second channel, and a cap and a lateral outlet are arranged at the end of the first flushing pipe located in the first flow channel, so that the double-slurry liquid injection and reflux flushing functions can be realized, the structure is simple, the operation is convenient, it is not easy to be blocked, the grouting effect is good, and the maintenance workload is small.

Description

Technical Field

[0001] The invention belongs to the field of shield machine equipment, and in particular relates to a synchronous double-liquid grouting system for an ultra-large diameter shield machine. Background Art

[0002] During the shield tunneling process, grouting operations need to be carried out simultaneously, using slurry to fill the gaps between the excavated geology and the segments, so that the surrounding rock and soil can be supported, soil collapse can be avoided, and surface subsidence can be controlled.

[0003] Traditional synchronous grouting is mostly single-liquid grouting, which has the advantages of simple structure and low cost, but the initial setting time of the slurry is long, it is difficult to solidify at a fixed point, and the grouting effect is not good. In order to optimize the grouting effect, a dual-liquid synchronous grouting system has appeared on the market. This system can make the mixed slurry solidify in a shorter time by mixing a coagulant into the slurry. It is becoming more and more common in ultra-large diameter shield grouting, but this system requires the setting of complex pipelines for slurry mixing, and the structure is complex, especially the grouting gun part, which will also occupy the valuable space in the width and thickness direction of the grouting gun. Due to the short initial setting time of the mixed slurry, the grouting pipe is also The probability of the pipeline being blocked is high, and a flushing unit needs to be set up for timely flushing. Traditional flushing units are mostly open flushing. The flushing water is connected to the flushing pipeline, and the flow of the flushing water is used and finally discharged from the slurry outlet to achieve the flushing operation of the slurry pipeline. Since the flushing water and the mixed liquid will flow out from the slurry outlet, it is easy to cause erosion to the newly solidified slurry, resulting in poor grouting effect. The scattered flushing water and mixed liquid will also cause the environment of the pipe segment to be in a muddy state for a long time, making subsequent cleaning difficult. When the slurry pipeline is blocked due to untimely flushing, the grouting gun needs to be disassembled as a whole for cleaning, which is labor-intensive and inconvenient to operate. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an ultra-large diameter shield synchronous double-liquid grouting system with double-liquid grouting and reflux flushing functions, simple structure, good grouting effect, not easy to block, small workload for cleaning after blockage, and easy operation.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is a synchronous double-liquid grouting system for an ultra-large diameter shield machine, characterized in that it comprises:

[0006] A grouting unit, wherein the grouting unit comprises a plurality of grouting guns, wherein the plurality of grouting guns are distributed in a ring shape on the shield body of the shield machine, wherein the extension direction of the grouting guns is parallel to the axis of the shield body, wherein a first channel and a second channel and a connecting cavity are provided in the gun body of the grouting gun, wherein one end of the connecting cavity is connected with the first channel and the second channel, and the other end of the connecting cavity penetrates the end surface of the gun body close to the tail of the shield body, wherein a plug is inserted in the connecting cavity, and a through flow channel is provided on the plug, wherein the through flow channel comprises a first flow channel and a second flow channel intersecting with the first flow channel, wherein an opening of one end of the first flow channel faces the first channel, and an opening of the other end of the first flow channel forms a slurry outlet of the grouting gun, and an opening of the second flow channel away from the first flow channel faces the second channel;

[0007] A mixing unit, the mixing unit comprising a mixer and a mixing pipe, the mixer comprising a first pipe section, a second pipe section and a mixing pipe section, one end of the first pipe section is connected to a first slurry tank through a first slurry pipe, the other end of the first pipe section is connected to an inlet end of the mixing pipe section, one end of the second pipe section is connected to a second slurry tank through a second slurry pipe, the other end of the second pipe section is connected to an inlet end of the mixing pipe section, the outlet of the mixing pipe section is connected to an inlet of the mixing pipe, the mixing pipe is inserted in the second channel, and the outlet of the mixing pipe is connected to the second flow channel in a butt connection;

[0008] A flushing unit, the flushing unit includes a first flushing pipe and a flushing water tank, the first flushing pipe can be axially slidably inserted into the first flow channel along the second channel, the outer wall of the first flushing pipe is sealed and connected to the inner wall of the first flow channel, the end of the first flushing pipe located in the first flow channel is provided with a head, the outer wall of the end is provided with a lateral outlet, the end of the first flushing pipe away from the first flow channel is connected to the flushing water tank, the first flushing pipe has a first working position and a second working position, when the first flushing pipe is in the first working position, the head is located on a side of the first flow channel close to the first channel, the mixing pipe is connected with the second flow channel and the first flow channel, so that the mixed slurry can be pumped out from the slurry outlet, when the first flushing pipe is in the second working position, the head is located on a side of the first flow channel close to the slurry outlet, the lateral outlet is connected with the second flow channel, so that the flushing water can flow back to the mixing pipe along the lateral outlet and the second flow channel for flushing operations.

[0009] Preferably, a first one-way valve is provided on the second pipe section, and the first one-way valve is used to prevent the flushing water from flowing back to the second slurry tank along the second pipe section.

[0010] Further preferably, the flushing unit further comprises a sewage pipe and a sewage tank, one end of the sewage pipe is connected to the first slurry pipe, and the other end of the sewage pipe is connected to the sewage tank.

[0011] Further preferably, the flushing unit also includes a second flushing pipe connected to the first slurry pipe, and the connection point between the second flushing pipe and the first slurry pipe is located between the connection point between the sewage pipe and the first slurry pipe and the first slurry tank, and is close to the connection point between the first slurry pipe and the first slurry tank.

[0012] Further preferably, the end of the second flushing pipeline away from the first slurry pipeline is connected to the flushing water tank or the industrial water tank of the shield machine.

[0013] Further preferably, a second one-way valve is provided on the first slurry pipe, and the second one-way valve is located on the side of the connecting point between the sewage pipe and the first slurry pipe close to the first slurry tank, and the second one-way valve is used to prevent the flushing water from flowing back along the first slurry pipe.

[0014] Preferably, the ultra-large diameter shield synchronous dual-liquid grouting system also includes a hydraulic cylinder, the cylinder body of the hydraulic cylinder is connected to the shield body, and the hydraulic rod of the hydraulic cylinder is hollow inside, so that the hydraulic rod constitutes the first flushing pipeline.

[0015] Preferably, the end of the first flushing pipe away from the first flow channel is connected to the flushing water tank through a first hose.

[0016] Preferably, the outlet of the mixing pipe section is connected to the inlet of the mixing pipe through a second hose.

[0017] Preferably, a rotatable stirring paddle is provided in the first slurry tank.

[0018] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0019] 1. It has the functions of double-liquid grouting and backflow flushing, simple structure and good grouting effect. Backflow flushing means that the flushing water and mixed slurry will not flow out of the slurry outlet during flushing, and will not cause erosion to the newly solidified slurry. The simple structure is specifically reflected in the fact that there is no need to set up complex pipes and control devices in the grouting gun, and the space occupied in the width and thickness directions of the grouting gun is small. The good grouting effect means that the double-liquid grouting can achieve fixed-point solidification, and the solidification effect of the slurry that has flowed out of the slurry outlet will not be affected during flushing.

[0020] 2. Not easy to get clogged, small workload for cleaning after blockage, and easy operation. Not easy to get clogged means that it is easy to switch between grouting and flushing modes, and the grouting pipe can be flushed in time to reduce the chance of blockage in the grouting pipe. Small workload for cleaning after blockage and easy operation are mainly reflected in that when the first flow channel close to the slurry outlet is blocked (the most common blockage point), it can be cleaned by removing the plug without disassembling the grouting gun, mixing pipe and the first flushing pipe. The workload is small and the operation is simple and convenient. When the mixing pipe is blocked, the plug can be removed and the mixing pipe can be pulled out from the front or rear of the gun body for maintenance without disassembling the grouting gun. The workload is small and the maintenance is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , Figure 2 , Figure 3 is a schematic diagram of the structure of the first embodiment of the present invention, wherein: Figure 1 In normal grouting mode, Figure 2 In the mixing + first slurry pipeline front flushing mode, Figure 3 In first slurry pipeline rear flush mode.

[0022] Figure 4 yes Figure 1 A partial enlarged schematic diagram of the middle grouting gun.

[0023] Figure 5 yes Figure 2 A partial enlarged schematic diagram of the middle grouting gun.

[0024] Figure 6 yes Figure 3 A partial enlarged schematic diagram of the middle grouting gun

[0025] Figure 7 It is a schematic diagram of the structure of the second embodiment of the present invention, which is in the flushing mode at this time.

[0026] Among them: 11. grouting gun; 111. gun body; 112. first channel; 113. second channel; 114. connecting cavity; 115. plug; 116. through-flow channel; 117. first flow channel; 118. second flow channel; 119. slurry outlet; 21. mixer; 211. first pipe section; 212. second pipe section; 213. mixing pipe section; 214. first slurry pipeline; 215. first slurry tank; 216. second slurry pipeline; 217. second slurry tank; 218. first one-way valve; 219. second one-way valve; 220. Agitator; 22. Mixing pipe; 221. Second hose; 31. First flushing pipe; 311. End cap; 312. Lateral outlet; 32. Flushing water tank; 33. Sewage pipe; 34. Sewage tank; 35. Second flushing pipe; 36. First hose; 40. Hydraulic cylinder; 41. Cylinder body; 42. Hydraulic rod; 51. First valve; 52. Second valve; 53. Third valve; 54. Fourth valve; 55. Fifth valve; 56. First pump; 57. Second pump; 58. Third pump; 59. Sixth valve; 60. Seventh valve. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0028] Embodiment 1

[0029] like Figures 1 to 4As shown, the ultra-large diameter shield synchronous double-liquid grouting system provided by the present invention comprises: a grouting unit, a mixing unit, and a flushing unit, wherein the grouting unit comprises a plurality of grouting guns 11, and the plurality of grouting guns 11 are distributed in a ring shape on the shield body of the shield machine, and the extension direction of the grouting guns 11 is parallel to the axis of the shield body, and the gun body 111 of the grouting gun 11 is provided with a first channel 112 and a second channel 113 parallel to each other, and a connecting cavity 114, and one end of the connecting cavity 114 is connected to the first channel The connecting cavity 114 is connected to the second channel 112, and the other end of the connecting cavity 114 passes through the end surface of the gun body 111 near the tail of the shield body. A plug 115 is inserted into the connecting cavity 114, and the plug 115 is detachably connected to the gun body 111. The plug 115 is provided with a through flow channel 116, all openings of which are located on the outer surface of the plug 115. The through flow channel 116 includes a first flow channel 117 and a second flow channel 118 intersecting the first flow channel 117. The opening faces the first channel 112, the opening at the other end of the first flow channel 117 forms the slurry outlet 119 of the grouting gun 11, and the opening of the second flow channel 118 away from the first flow channel 117 faces the second channel 113; the mixing unit includes a mixer 21 and a mixing pipe 22, the mixer 21 has a first pipe section 211, a second pipe section 212 and a mixing pipe section 213, one end of the first pipe section 211 is connected to the first slurry tank 215 through a first slurry pipe 214, the other end of the first pipe section 211 is connected to the inlet end of the mixing pipe section 213, one end of the second pipe section 212 is connected to the second slurry tank 217 through a second slurry pipe 216, the other end of the second pipe section 212 is connected to the inlet end of the mixing pipe section 213, the outlet of the mixing pipe section 212 is connected to the inlet of the mixing pipe 22, the mixing pipe 22 is inserted in the second channel 113, and the outlet of the mixing pipe 22 is connected to the second flow channel 118 (no leakage);The flushing unit includes a first flushing pipe 31 and a flushing water tank 32. The first flushing pipe 31 is inserted in the second channel 113. The end of the first flushing pipe 31 extends into the first flow channel 117 and can be axially slidably inserted in the first flow channel 117. The outer wall of the first flushing pipe 31 is sealed and connected to the inner wall of the first flow channel 117 through multiple annular sealing rings. The end of the first flushing pipe 31 located in the first flow channel 117 is provided with a head 311, and the outer wall of the end is provided with a lateral outlet 312. The end of the first flushing pipe 31 away from the first flow channel 117 is connected to the flushing water tank 32. The first flushing pipe 31 has a first flushing pipe 31. A working position and a second working position. When the first flushing pipeline 31 is in the first working position, the end cap 311 is located on the side of the first flow channel 117 close to the first channel 112, and the mixing pipeline 22 is connected with the second flow channel 118 and the first flow channel 117, so that the mixed slurry can be pumped out from the slurry outlet 119. When the first flushing pipeline 31 is in the second working position, the end cap 311 is located on the side of the first flow channel 117 close to the slurry outlet 119, and the lateral outlet 312 is connected with the second flow channel 118, so that the flushing water can flow back to the mixing pipeline 22 along the lateral outlet 312 and the second flow channel 118 to perform the flushing operation. ;

[0030] The advantages of this setting are:

[0031] 1. It has the functions of double-liquid grouting and backflow flushing, simple structure and good grouting effect. Backflow flushing means that the flushing water and mixed slurry will not flow out of the slurry outlet during flushing, and will not cause erosion to the newly solidified slurry. The simple structure is specifically reflected in the fact that there is no need to set up complex pipes and control devices in the grouting gun, and the space occupied in the width and thickness directions of the grouting gun is small. The good grouting effect means that the double-liquid grouting can achieve fixed-point solidification, and the solidification effect of the slurry that has flowed out of the slurry outlet will not be affected during flushing.

[0032] 2. Not easy to be blocked, small workload for cleaning after blockage, and easy operation. Not easy to be blocked means that it is easy to switch between grouting and flushing modes, flush the grouting pipeline in time, and reduce the probability of blockage of the grouting pipeline. The workload of cleaning after blockage is small and the operation is convenient. It is mainly reflected in that when the first flow channel close to the slurry outlet is blocked (the most common blockage point), it can be cleaned by removing the plug, without disassembling the grouting gun, mixing pipeline and the first flushing pipeline, with less workload and simple and convenient operation. When the mixing pipeline is blocked, the plug can be removed and the mixing pipeline can be pulled out from the front or rear of the gun body for maintenance, without disassembling the grouting gun, with less workload and simple and convenient maintenance.

[0033] 3. The slurry outlet is wrapped by a plug in the radial direction, which has high strength and is not easily deformed when squeezed, and does not affect the grouting effect. Even if deformation occurs, it can be replaced by replacing the plug without disassembling the grouting gun for correction, with small workload and easy operation.

[0034] In this embodiment, a first one-way valve 218 is provided on the second pipe section 212, and the first one-way valve 218 is used to prevent flushing water from flowing back to the second slurry tank 217 along the second pipe section 212; the flushing unit also includes a sewage pipe 33, a sewage tank 34, and a second flushing pipe 35, one end of the sewage pipe 33 is connected to the first slurry pipe 214, and the other end of the sewage pipe 33 is connected to the sewage tank 34, the second flushing pipe 35 is connected to the first slurry pipe 214, and the connection point A between the second flushing pipe 35 and the first slurry pipe 214 is located between the connection point B between the sewage pipe 33 and the first slurry pipe 214 and the connection point C between the first slurry pipe 214 and the first slurry tank 215, and is close to the connection point C between the first slurry pipe 214 and the first slurry tank 215, and the end of the second flushing pipe 35 away from the first slurry pipe 214 is connected to the industrial water tank of the shield machine.

[0035] Of course, the ultra-large diameter shield synchronous double-liquid grouting system must include valves and pumps installed on the pipeline, such as Figures 1 to 3 As shown, a first valve 51 is provided at the connecting point C between the first slurry pipe 214 and the first slurry tank 215, a second valve 52 is provided at the connecting point B between the sewage pipe 33 and the first slurry pipe 214 on the side close to the first slurry tank 215, and a third valve 53 is provided on the side away from the second slurry tank 215, and the third valve 53 is located between the connecting point B and the first pipe section 211, and a first pump 56 is also provided on the first slurry pipe 214, and the first pump 56 is located between the first valve 51 and the second valve 52, a fourth valve 54 and a second pump 57 are provided in sequence on the second slurry pipe 216 along the second slurry flow direction, a fifth valve 55 and a third pump 58 are provided at the outlet of the flushing water tank 32, a sixth valve 59 is provided on the sewage pipe 33, and a seventh valve 60 is provided on the second flushing pipe 35.

[0036] This arrangement enables the ultra-large diameter shield synchronous dual-liquid grouting system to have at least three working modes, namely normal grouting mode, mixing + first slurry pipeline front flushing mode, and first slurry pipeline rear flushing mode.

[0037] Normal grouting mode: slide the first flushing pipe 31 to the first working position, open the first valve 51, the second valve 52, the third valve 53, the fourth valve 54, the first pump 56, and the second pump 57, close the sixth valve 59 and the seventh valve 60, and the first slurry and the second slurry flow into the mixer 21 along the first slurry pipe 214 and the second slurry pipe 216 respectively. After mixing, they flow into the mixing pipe 22 through the mixing pipe section 213, and then are pumped out from the slurry outlet 119 through the second flow channel 118 and the first flow channel 117 to achieve synchronous dual-liquid grouting.

[0038] Mixing + first slurry pipeline front flushing mode: slide the first flushing pipeline 31 to the second working position, close the first valve 51, the second valve 52, the fourth valve 54, the first pump 56, the second pump 57, open the fifth valve 55, the third pump 58, the sixth valve 59, and the flushing water in the flushing water tank 32 flows back to the sewage tank 34 through the first flushing pipeline 31, the lateral outlet 312, the second flow channel 118, the mixing pipeline 22, the mixing pipe section 213, the first pipe section 211, the front of the first slurry pipeline 214, and the sewage pipeline 33, thereby realizing the first section of reflux flushing.

[0039] Rear flushing mode of the first slurry pipeline: close the third valve 53, open the second valve 52, the seventh valve 60 and the first pump 56, and the industrial water flows back to the sewage tank 34 along the second flushing pipeline 35, the rear of the first slurry pipeline 214, and the sewage pipeline 33, realizing the second stage of backflow flushing.

[0040] The two-stage reflux flushing method can shorten the flow distance of the mixed liquid in the mixing pipe and the mixing section in the first slurry pipe, avoid the solidification of the mixed liquid due to excessive reflux time, and at the same time, can also completely and thoroughly flush the first slurry pipe, with a better flushing effect.

[0041] The flushing effect can be judged by a camera installed at the sewage tank 34.

[0042] In this embodiment, the ultra-large diameter shield synchronous double-liquid grouting system also includes a hydraulic cylinder 40. The cylinder body 41 of the hydraulic cylinder 40 is connected to the shield body. The hydraulic rod 42 of the hydraulic cylinder 40 is hollow inside to form a first flushing pipe 31. The hydraulic rod 42 is driven by a piston in the cylinder body 41. There is no need to set a high-pressure oil channel or connect a high-pressure oil pipe on the gun body 111. This can prevent the hydraulic oil from leaking into the first channel 112, and can also simplify the design of the gun body 111, reducing the processing difficulty and processing cost.

[0043] To facilitate the disassembly of the first flushing pipe 31 , in the present embodiment, the end of the first flushing pipe 31 away from the first flow channel 117 is connected to the outlet pipe of the flushing water tank 32 via a first hose 36 .

[0044] To facilitate the position adjustment of the mixer 21, the outlet of the mixing pipe section 213 is connected to the inlet of the mixing pipe 22 through the second hose 221. The advantage of this arrangement is that by replacing the second hose 221 of different lengths, the time taken for the mixed slurry to flow from the mixing pipe section 213 to the slurry outlet 119 can be adjusted while the slurry outlet speed remains unchanged, so as to adapt to slurries with different solidification times, thereby accurately controlling the time from the mixed liquid leaving the slurry outlet 119 to solidification, thereby improving the grouting effect.

[0045] In order to prevent the first slurry in the first slurry box 215 from solidifying, a rotatable stirring paddle 220 is provided in the first slurry box 215 , and a driving motor for driving the stirring paddle 220 to rotate is connected to the first slurry box 215 .

[0046] Embodiment 2

[0047] like Figure 7 As shown, the second embodiment is basically the same as the first embodiment, except that, in the second embodiment, a second one-way valve 219 is provided on the first slurry pipe 214, and the second one-way valve 219 is located on the side of the connecting point B between the sewage pipe 33 and the first slurry pipe 214 close to the first slurry tank 215. The second one-way valve 219 is used to prevent the flushing water from flowing back to the first slurry tank 215 along the first slurry pipe 214. Due to the presence of the second one-way valve 219, it is not affected by the pressure difference between the front and rear of the first slurry pipe 214, so that the mixed + first slurry pipe front flushing mode and the first slurry pipe rear flushing mode in the first embodiment are carried out at the same time, realizing a complete flushing mode, which is easy to operate and saves time and effort.

[0048] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-large diameter shield synchronous double-liquid grouting system, characterized in that: include: A grouting unit, wherein the grouting unit comprises a plurality of grouting guns, wherein the plurality of grouting guns are distributed in a ring shape on the shield body of the shield machine, wherein the extension direction of the grouting guns is parallel to the axis of the shield body, wherein a first channel and a second channel and a connecting cavity are provided in the gun body of the grouting gun, wherein one end of the connecting cavity is connected with the first channel and the second channel, and the other end of the connecting cavity penetrates the end surface of the gun body close to the tail of the shield body, wherein a plug is inserted in the connecting cavity, and a through flow channel is provided on the plug, wherein the through flow channel comprises a first flow channel and a second flow channel intersecting with the first flow channel, wherein an opening of one end of the first flow channel faces the first channel, and an opening of the other end of the first flow channel forms a slurry outlet of the grouting gun, and an opening of the second flow channel away from the first flow channel faces the second channel; A mixing unit, the mixing unit comprising a mixer and a mixing pipe, the mixer comprising a first pipe section, a second pipe section and a mixing pipe section, one end of the first pipe section is connected to a first slurry tank through a first slurry pipe, the other end of the first pipe section is connected to an inlet end of the mixing pipe section, one end of the second pipe section is connected to a second slurry tank through a second slurry pipe, the other end of the second pipe section is connected to an inlet end of the mixing pipe section, the outlet of the mixing pipe section is connected to an inlet of the mixing pipe, the mixing pipe is inserted in the second channel, and the outlet of the mixing pipe is connected to the second flow channel in a butt connection; A flushing unit, the flushing unit includes a first flushing pipe and a flushing water tank, the first flushing pipe can be axially slidably inserted into the first flow channel along the second channel, the outer wall of the first flushing pipe is sealed and connected to the inner wall of the first flow channel, the end of the first flushing pipe located in the first flow channel is provided with a head, the outer wall of the end is provided with a lateral outlet, the end of the first flushing pipe away from the first flow channel is connected to the flushing water tank, the first flushing pipe has a first working position and a second working position, when the first flushing pipe is in the first working position, the head is located on a side of the first flow channel close to the first channel, the mixing pipe is connected with the second flow channel and the first flow channel, so that the mixed slurry can be pumped out from the slurry outlet, when the first flushing pipe is in the second working position, the head is located on a side of the first flow channel close to the slurry outlet, the lateral outlet is connected with the second flow channel, so that the flushing water can flow back to the mixing pipe along the lateral outlet and the second flow channel for flushing operations.

2. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 1 is characterized in that: The second pipe section is provided with a first one-way valve, and the first one-way valve is used to prevent the flushing water from flowing back to the second slurry tank along the second pipe section.

3. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 2 is characterized in that: The flushing unit further includes a sewage pipe and a sewage tank. One end of the sewage pipe is connected to the first slurry pipe, and the other end of the sewage pipe is connected to the sewage tank.

4. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 3 is characterized in that: The flushing unit also includes a second flushing pipe connected to the first slurry pipe, and the connection point between the second flushing pipe and the first slurry pipe is located between the connection point between the sewage pipe and the first slurry pipe and the connection point between the first slurry pipe and the first slurry tank, and is close to the connection point between the first slurry pipe and the first slurry tank.

5. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 4 is characterized in that: The end of the second flushing pipeline away from the first slurry pipeline is connected to the flushing water tank or the industrial water tank of the shield machine.

6. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 4 is characterized in that: A second one-way valve is provided on the first slurry pipeline. The second one-way valve is located on the side of the connecting point between the sewage pipeline and the first slurry pipeline close to the first slurry tank. The second one-way valve is used to prevent the flushing water from flowing back along the first slurry pipeline.

7. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 1 is characterized in that: The ultra-large diameter shield synchronous double-liquid grouting system also includes a hydraulic cylinder, the cylinder body of the hydraulic cylinder is connected to the shield body, and the hydraulic rod of the hydraulic cylinder is hollow inside, so that the hydraulic rod constitutes the first flushing pipeline.

8. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 1 is characterized in that: The end of the first flushing pipeline away from the first flow channel is connected to the flushing water tank through a first hose.

9. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 1 is characterized in that: The outlet of the mixing pipe section is connected to the inlet of the mixing pipeline through a second hose.

10. The ultra-large diameter shield synchronous double-liquid grouting system according to claim 1, characterized in that: A rotatable stirring paddle is arranged in the first slurry tank.

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