Shield tunnel outside-ring grouting reinforcing device

Abstract

The invention discloses a shield tunnel ring outer grouting reinforcing device, and relates to the field of shield tunnel ring outer soil layer reinforcing equipment, the shield tunnel ring outer grouting reinforcing device comprises a trolley and a grouting machine arranged on the trolley, the shield tunnel ring outer grouting reinforcing device further comprises a supporting frame arranged on the trolley, the supporting frame is provided with a drill rod used for drilling a soil layer, and the drill rod is provided with a grouting channel in the length direction of the drill rod; the grouting channel penetrates through the drill rod, and an output port of the grouting machine is communicated with the grouting channel through a grouting pipe; the drill rod comprises an outer pipe and an inner pipe, the outer pipe is rotationally connected to the supporting frame, a driving part used for driving the outer pipe to rotate is arranged on the supporting frame, the inner pipe is slidably arranged in the outer pipe, a power part is arranged on the supporting frame, and the power part is used for driving the inner pipe to slide in the length direction of the outer pipe; the drilling rod is transformed into a drilling and grouting integrated structure, meanwhile, the telescopic movement of the drilling rod is utilized, the working requirements of drilling and grouting can be met, grouting work can be conducted immediately after drilling, and the construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of equipment for reinforcing soil layers outside a shield tunnel ring, and in particular to a grouting reinforcement device outside a shield tunnel ring. Background Art

[0002] Shield tunnel construction often faces complex geological conditions and the influence of the surrounding environment. When crossing water-rich strata, there may be risks such as water and sand gushing, which seriously affect the safety and progress of construction. On the one hand, the water pressure in the water-rich strata may cause leakage of tunnel segments and cause instability of the tunnel structure. On the other hand, when the shield tunnel passes under old buildings, the vibration and stratum deformation during the construction process may affect the foundation of the building, causing cracks and tilting of the building. In addition, uneven settlement is an issue that cannot be ignored in shield tunnel construction. It may cause damage to the tunnel structure, such as cracking and misalignment of the segments, seriously affecting the overall stability and service life of the tunnel. In addition, uneven settlement may also cause water leakage in the tunnel, further aggravating the damage to the tunnel structure and even threatening the driving safety in the tunnel. Leakage not only reduces the tunnel's traffic capacity, but also may corrode the equipment and facilities in the tunnel, increasing maintenance costs. Therefore, in order to ensure the safety of the shield tunnel, it is necessary to improve the stability of the outer ring soil layer of the shield tunnel. At present, grouting reinforcement is generally carried out in the outer ring soil layer to enhance the engineering properties of the weak soil layer to avoid uneven settlement of the tunnel. The main method is to inject grout into the soil layer outside the tunnel segment so that the concrete slurry and the soil layer form a whole, thereby ensuring the stability of the soil layer.

[0003] The main construction steps at present are to make the drill bit of the drilling machine enter the outer ring soil layer along the grouting holes reserved on the pipe segment to drill holes in the outer ring soil layer. After the drilling is completed, a grouting machine is used to enter the drilled hole to carry out grouting.

[0004] With respect to the above-mentioned related technologies, the inventors believe that since drilling and grouting require different equipment, after the drilling machine completes the drilling, the grouting machine needs to be replaced for grouting, which affects the construction efficiency. Summary of the invention

[0005] In order to improve construction efficiency, the present application provides a shield tunnel outer ring grouting reinforcement device.

[0006] The present application provides a shield tunnel outer ring grouting reinforcement device, which adopts the following technical solution:

[0007] A shield tunnel outer ring grouting reinforcement device comprises a trolley and a grouting machine arranged on the trolley, and also comprises a support frame arranged on the trolley, the support frame is provided with a drill rod for drilling holes in soil layers, the drill rod is provided with a grouting channel along its own length direction, the grouting channel runs through the drill rod, and the grouting machine output port is connected to the grouting channel through a grouting pipe; the drill rod comprises an outer tube and an inner tube, the outer tube is rotatably connected to the support frame, the support frame is provided with a driving member for driving the outer tube to rotate, the inner tube is slidably arranged in the outer tube, the support frame is provided with a power member, and the power member is used to drive the inner tube to slide along the length direction of the outer tube.

[0008] By adopting the above technical solution,

[0009] Step 1: Preparation. Comprehensively check the mechanical structure of the trolley, including wheels, frame, hydraulic system, etc., to ensure that all components are firmly connected, without looseness and damage. Check the performance and connection of power parts (such as motors, hydraulic pumps, etc.) and drive parts to ensure that they can work normally. The power of the power parts is determined according to the depth and diameter of the drill hole, generally 5kW to 10kW. The reduction ratio of the drive part should be determined according to the drill rod speed and torque requirements, generally 10:1 to 20:1. Check the pressure, flow and sealing of the grouting machine to ensure that it can meet the grouting requirements. Prepare grouting materials such as cement, water glass, and admixtures according to design requirements.

[0010] Step 2: Position the trolley and adjust the drill rod position. When in use, drive the trolley to a suitable position, adjust the position of the mounting seat by using the cylinder, and adjust the position of the drill rod so that the drill rod is aligned with the grouting hole reserved on the segment, and the deviation between the drill rod and the grouting hole is controlled within ±5mm. The length of the drill rod is 1.2 to 1.5 times the thickness of the segment plus the grouting depth. The inner diameter of the drill rod is 20mm to 40mm, and the outer diameter is 50mm to 80mm. The material is high-strength alloy steel.

[0011] Step 3: Drilling the inner tube. Then drive the inner tube to slide through the power part, so that the inner tube is inserted into the reserved grouting hole on the pipe segment, and control the sliding speed between 5-10mm / s to avoid damage to the pipe segment caused by drilling too fast. At the same time, pay attention to the sealing of the inner tube during the drilling process. If there is leakage, it should be handled in time. It can be repaired by using sealant or replacing seals.

[0012] Step 4: Drive the outer tube into the hole. Then start the drive to drive the outer tube to rotate slowly to drill holes in the soil layer outside the segment. Control the rotation speed between 10-20r / min and the forward pressure within the range of 5-10kN to avoid damage to the segment and soil layer caused by excessive rotation. At the same time, the drilling depth is within the range of 0 to 2.5m outside the tunnel structure.

[0013] Step 5: Preparation of grouting materials. Grouting materials use cement-water glass double slurry, cement: water glass = 3-4:1, where the water-cement ratio of cement slurry is 1.0-1.5:1, 42.5 ordinary Portland cement is used, and the water glass liquid uses 35°Be, neutral water glass, and the modulus is 2.85. Addition of admixtures is carried out as needed, such as retarders, early strength agents, etc.

[0014] Step 6: Grouting construction. After drilling to the appropriate position, grout the drilled hole through the grouting machine. The grouting pressure is 0.3-0.4MPa and the grouting flow rate is between 5-10L / min. At the same time, the inner tube is slid to gradually withdraw from the drilled hole, and the sliding speed is controlled between 5-10mm / s to avoid the influence of too fast withdrawal on the grouting effect. After grouting to the range required by the design, stop the grouting machine and complete the reinforcement of the soil layer outside the pipe segment.

[0015] Step 7: Tunnel convergence monitoring and grouting effect inspection. During the micro-disturbance grouting construction, when the tunnel convergence unilateral change value is <5mm (alarm value 3mm), the grouting should be stopped to ensure the safety and stability of the tunnel. At the same time, after the construction is completed, the grouting effect should be inspected and evaluated. The drilling coring, water pressure test and other methods can be used for detection to ensure that the quality and effect of grouting reinforcement meet the design requirements. When drilling coring, several boreholes should be selected in the grouting area, and core samples should be taken out for observation and analysis. The core samples should be complete and dense, without cracks and holes. At the same time, the strength and permeability of the core samples should be measured to ensure that they meet the design requirements. During the water pressure test, several grouting holes should be selected in the grouting area for water pressure test. The pressure of the water pressure test is 0.5MPa~1.0MPa. The flow rate of the water pressure test should be stable within a certain range without obvious changes. At the same time, the leakage of the surrounding soil layer should be observed to ensure that the grouting effect is good.

[0016] This solution can meet the working requirements of drilling and grouting by transforming the drill rod into an integrated structure for drilling and grouting and utilizing the telescopic movement of the drill rod. Grouting can be carried out immediately after drilling, thus improving construction efficiency.

[0017] Optionally, the driving member adopts a rotary driver, a slider is fixedly connected to the outer wall of the inner tube, a spiral groove is opened on the inner wall of the outer tube along its length direction, the slider is inserted in the spiral groove and can move along the path direction of the spiral groove, and the power member is a rotary driver, which drives the outer tube to rotate through the rotary driver to drive the inner tube to slide.

[0018] By adopting the above technical solution, when in use, after the inner tube is inserted into the grouting hole and the inner tube is pushed against the soil layer, the rotary driver is used to drive the outer tube to rotate. Due to the cooperation between the spiral groove 1 and the slider, the inner tube can slide along the length direction of the outer tube and rotate at the same time, thereby meeting the working requirements of drilling holes. No other external force is required to push the drill rod to move. At the same time, due to the retractability of the drill rod, the length of the drill rod can be shortened when the drill rod is not needed, saving construction space.

[0019] Optionally, the support frame includes a cylinder, a fixed end of the cylinder is fixedly connected to the trolley, a telescopic end of the cylinder is fixedly connected to a mounting seat, and the outer tube is rotatably connected to the mounting seat.

[0020] By adopting the above technical solution, the position of the mounting seat can be adjusted by using a cylinder, thereby adjusting the position of the drill rod to adapt to the positions of different grouting holes on the pipe segment.

[0021] Optionally, a rotating seat is rotatably connected to the mounting seat, the rotating seat rotation axis is arranged along the axis direction of the pipe segment, the outer tube is rotatably arranged on the rotating seat, and the mounting seat is provided with a second motor for driving the rotating seat to rotate.

[0022] By adopting the above technical solution, the rotating seat is driven to rotate by the second motor, so that the angle of the drill rod can be adjusted to adapt to the positions of different grouting holes on the pipe segment.

[0023] Optionally, two support frames are provided, and drill rods are disposed on both support frames, and the two drill rods are symmetrically arranged.

[0024] By adopting the above technical solution, two drill rods are constructed at the same time, which can solve the problems such as tunnel settlement caused by uneven grouting, and compared with single-side grouting, the efficiency of grouting operation can be significantly improved.

[0025] Optionally, a slurry outlet connected to a grouting channel is provided on a side wall of one end of the inner tube away from the outer tube.

[0026] By adopting the above technical solution, during grouting, since the inner tube rotates when it exits the drilled hole, the setting of the grouting port can achieve the purpose of rotary grouting and improve the structural strength of the surrounding soil.

[0027] Optionally, a pressure sensor is installed on an end of the inner wall of the inner tube away from the outer tube.

[0028] By adopting the above technical solution, it is convenient to monitor the pressure changes in the slurry process.

[0029] Optionally, a flow sensor is installed on the inner wall of the inner tube.

[0030] By adopting the above technical solution, the flow sensor can accurately measure the flow rate and total amount of grouting material, providing important parameters for construction.

[0031] Optionally, a rotating drum is mounted on the support frame, the rotating drum is sleeved on the outer tube, a sealing airbag is sleeved on the rotating drum, and an air injection mechanism for inflating the airbag is provided on the rotating drum.

[0032] By adopting the above technical solution, during grouting, the front end of the outer tube can be inserted into the grouting hole on the pipe segment, and then the air bag is inflated by the air injection mechanism to expand the air bag, thereby ensuring the sealing of the grouting hole and preventing the slurry from overflowing from the grouting hole during grouting.

[0033] Optionally, the gas injection mechanism includes a gas injection cylinder and a piston, the gas injection cylinder is fixed on the outer wall of the rotating cylinder, the gas injection cylinder is connected to the air bag through an air pipe, the piston is arranged in the gas injection cylinder and can move along the length direction of the gas injection cylinder, the piston is fixedly connected to a push rod, and the push rod is provided with a positioning mechanism for positioning the piston; the positioning mechanism includes a positioning block and a fixed block, the fixed block is fixed to the end of the push rod away from the piston, the fixed block is provided with a makeshift groove for the positioning block to be inserted and slide, a spiral groove II for the positioning block to be inserted is provided on the outer wall of the outer tube, one end of the positioning block is inserted in the makeshift groove, and the other end of the positioning block is inserted in the spiral groove II, an annular groove is provided on the outer wall of the outer tube on the side of the spiral groove II close to the inner tube, the annular groove is connected to the spiral groove II, and the fixed block is provided with a spring I for driving the positioning block to be inserted into the spiral groove II.

[0034] By adopting the above technical solution, the inflation mechanism utilizes the rotation of the outer tube to drive the piston to move, and no other external force is required. It is simple and convenient. At the same time, through the setting of the annular groove, after the positioning block moves along the spiral groove 2 into the annular groove, the airbag is sufficiently expanded. At this time, since the outer tube needs to continue to rotate, the setting of the annular groove can, on the one hand, position the positioning block to ensure the expansion degree of the airbag, and on the other hand, does not affect the rotation of the outer tube.

[0035] In summary, this application includes the following beneficial technical effects:

[0036] 1. This solution transforms the drill rod into a structure that integrates drilling and grouting, and utilizes the telescopic movement of the drill rod to meet the requirements of drilling and grouting. Grouting can be carried out immediately after drilling, which improves construction efficiency.

[0037] 2. The present application utilizes a rotary driver to drive the outer tube to rotate. Due to the cooperation between the spiral groove and the slider, the inner tube can slide along the length direction of the outer tube and rotate at the same time, thereby meeting the working requirements of drilling holes. No other external force is required to push the drill rod to move. At the same time, due to the retractability of the drill rod, the length of the drill rod can be shortened when the drill rod is not needed, saving construction space. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the overall structure of a shield tunnel outer ring grouting reinforcement device embodiment 1 disclosed in the present application applied to a tunnel;

[0039] Figure 2 It is a schematic diagram of the overall structure of a shield tunnel outer ring grouting reinforcement device embodiment 1 disclosed in the present application;

[0040] Figure 3 A schematic diagram of the overall structure of a mechanical arm used as a support frame in Example 1 of a shield tunnel outer ring grouting reinforcement device disclosed in the present application;

[0041] Figure 4 yes Figure 2 Cross-sectional view of the middle drill pipe;

[0042] Figure 5 It is a schematic diagram of the overall structure of a shield tunnel outer ring grouting reinforcement device embodiment 2 disclosed in the present application;

[0043] Figure 6 yes Figure 5 A schematic diagram of a local structure (where the gas injection cylinder and the positioning block are schematic diagrams of a partial section);

[0044] Figure 7 yes Figure 6 A magnified schematic diagram of the middle A area;

[0045] Figure 8 It is a schematic cross-sectional view of a grouting reinforcement layer after rotary grouting in Example 2 of a shield tunnel outer ring grouting reinforcement device disclosed in the present application;

[0046] Fig. 9 It is a schematic diagram of the overall structure of Example 3 of an outer ring grouting reinforcement device for a shield tunnel disclosed in the present application.

[0047] Fig.10 It is a working method process diagram of the present invention;

[0048] Description of reference numerals:

[0049] 1. Trolley; 2. Support frame; 3. Grouting machine; 4. Segment; 5. Mounting seat; 6. Drill rod; 7. Inner tube; 8. Outer tube; 9. Rotary driver; 10. Spiral groove 1; 11. Sliding block; 12. Grouting channel; 13. Grouting pipe; 14. Connecting pipe; 15. Grouting outlet; 16. Rotating seat; 17. Motor 1; 18. Motor 2; 19. Rotating drum; 20. Air bag; 21. Air injection cylinder; 22. Piston; 23 , push rod; 24, positioning block; 25, fixing block; 26, give way groove; 27, spiral groove two; 28, annular groove; 29, spring one; 30, spring two; 31, pull rod; 32, grouting hole; 33, rotary connector; 34, air pipe; 35, mechanical arm; 36, flow sensor; 37, pressure sensor; 38, small geological exploration equipment; 39, batching tank; 40, mixing box; 41, grouting reinforcement layer. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-9 This application is described in further detail.

[0051] The application discloses a shield tunnel outer ring grouting reinforcement device.

[0052] Embodiment 1;

[0053] Reference Figure 1 and Figure 2 A shield tunnel outer ring grouting reinforcement device comprises a trolley 1, a support frame 2 and a grouting machine 3 arranged on the trolley 1, a drilling mechanism is arranged on the support frame 2, the support frame 2 is used to support the drilling mechanism, the drilling mechanism is used to drill the soil layer outside the tunnel segment 4, and the grouting machine 3 is used to grout the holes drilled by the drilling mechanism, so as to achieve the reinforcement of the soil layer outside the tunnel ring.

[0054] The support frame 2 includes a cylinder, which is vertically arranged. The fixed end of the cylinder is fixedly connected to the trolley 1 , and the telescopic end of the cylinder is fixedly connected to the mounting seat 5 . The drilling mechanism is arranged on the mounting seat 5 .

[0055] Reference Figure 3 In another embodiment, the support frame 2 may also adopt a robotic arm 35 .

[0056] In this embodiment, two support frames 2 are provided, and drilling mechanisms are provided on the two support frames 2 . The two drilling mechanisms are symmetrically arranged.

[0057] Reference Figure 2 and Figure 4In this embodiment, the drilling mechanism includes a drill rod 6 and a driving member. The drill rod 6 includes an inner tube 7 and an outer tube 8. The end of the inner tube 7 away from the outer tube 8 is fixedly connected to a drill bit. The outer tube 8 is rotatably connected to the mounting seat 5. The rotation axis of the outer tube 8 is arranged along its own length direction. The driving member is arranged on the mounting seat 5, and the driving member is used to drive the outer tube 8 to rotate; the inner tube 7 is slidably arranged in the outer tube 8, and the sliding direction of the inner tube 7 is arranged along the length direction of the outer tube 8. A power member is arranged on the mounting seat 5, and the power member is used to drive the inner tube 7 to slide.

[0058] In this embodiment, the rotation driver 9 can be a motor 17 and a gear transmission member, and the motor 17 is used to drive the outer tube 8 to rotate through the gear transmission member.

[0059] In this embodiment, the power member and the driving member are the same component, both of which are a rotary driver 9. The rotary driver 9 is arranged on the mounting seat 5. The rotary driver 9 is used to drive the outer tube 8 to rotate. In order to make the inner tube 7 slide, a spiral groove 10 is opened on the inner wall of the outer tube 8, and a slider 11 is fixedly connected to the outer wall of the inner tube 7. The slider 11 is inserted into the inner tube 7, and the slider 11 can move along the path direction of the spiral groove 10.

[0060] Through the cooperation of the slider 11 and the spiral groove 10, due to drilling and operation, after the inner tube 7 is pressed in the soil layer, the outer tube 8 rotates, which can drive the inner tube 7 to slide and rotate at the same time, thereby driving the drilling operation needs.

[0061] In order to carry out grouting operation immediately after drilling, a connected grouting channel 12 is opened in the inner tube 7. The grouting channel 12 is arranged along the length direction of the inner tube 7, and the grouting channel 12 passes through the end of the inner tube 7 away from the outer tube 8. In addition, a grouting pipe 13 is connected to the output port of the grouting machine 3. The grouting pipe 13 is a hose. The end of the outer tube 8 away from the inner tube 7 is rotatably connected to a rotary connector 33. The rotary connector 33 is fixed on the mounting seat 5. The end of the grouting pipe 13 away from the grouting machine 3 is connected to a rotary connector. The end of the inner tube 7 inserted into the outer tube 8 is coaxially rotatably connected to a connecting pipe 14. Part of the connecting pipe 14 is a hose. The connecting pipe 14 connects the grouting channel 12 on the inner tube 7 with the rotary connector 33.

[0062] It is worth noting that, in the present embodiment, the connecting tube 14 can be a hard tube, so that the two ends of the connecting tube 14 are rotatably connected to the inner tube 7 and the rotating connector 33 respectively, so as not to affect the rotation of the inner tube 7, and the middle part of the connecting tube 14 is a soft material, so as not to affect the telescopic movement of the inner tube 7; of course, the rotating connector 33 can also be rotatably set at the end of the inner tube 7 inserted into the outer tube 8, so that the connecting tube 14 and the rotating connector 33 on the inner tube 7 and the rotating connector 33 on the outer tube 8 are fixedly connected.

[0063] A grout outlet 15 connected to the grouting channel 12 is formed on a side wall of one end of the inner tube 7 away from the outer tube 8 .

[0064] A pressure sensor 37 is installed at one end of the inner wall of the inner tube 7 away from the outer tube 8, and a flow sensor 36 is installed on the inner wall of the inner tube 7. A control room can be set up on the trolley 1 to monitor the pressure and flow during grouting, and the control system performs analysis and processing to ensure accurate control of parameters such as pressure and flow during the grouting process. At the same time, an alarm system can be set up. When an abnormality is found, such as excessive pressure or insufficient flow, the alarm system will promptly issue an alarm and cooperate with the control system to take corresponding emergency measures.

[0065] The present application discloses an implementation principle of an outer ring grouting reinforcement device for a shield tunnel embodiment 1: when in use, the trolley 1 is driven to a suitable position to align the drill rod 6 with the grouting hole 32 reserved on the segment 4, and after the inner tube 7 is inserted into the grouting hole 32 and the inner tube 7 is pushed to the soil layer, the outer tube 8 is driven to rotate by the rotary driver 9. Due to the cooperation of the spiral groove 10 and the slider 11, the inner tube 7 can slide along the length direction of the outer tube 8 while rotating to perform the drilling work. After drilling to a suitable position, the drilled hole is grouted by the grouting machine 3, and at the same time, the inner tube 7 is slid to gradually withdraw from the drilled hole, thereby completing the grouting reinforcement work of the soil layer outside the segment 4.

[0066] Embodiment 2;

[0067] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that a rotating seat 16 is rotatably connected to the mounting seat 5, the rotating axis of the rotating seat 16 is arranged along the axial direction of the pipe segment 4, a motor 18 for driving the rotating seat 16 to rotate is fixedly connected to the mounting seat 5, and the drilling mechanism is arranged on the rotating seat 16.

[0068] Reference Figure 6 and Figure 7 A rotating drum 19 is sleeved on the outer wall of the end of the outer tube 8 protruding close to the inner tube 7. The rotating drum 19 is fixedly connected to the rotating seat 16. A sealing airbag 20 is sleeved on the rotating drum 19. The rotating drum 19 is provided with an air injection mechanism for inflating the airbag 20.

[0069] The gas injection mechanism includes a gas injection cylinder 21 and a piston 22. The gas injection cylinder 21 is fixed on the outer wall of the rotating cylinder 19. The gas injection cylinder 21 is connected to the airbag 20 through the air pipe 34. The piston 22 is arranged in the gas injection cylinder 21 and can move along the length direction of the gas injection cylinder 21. A push rod 23 is fixedly connected to the piston 22, and a positioning mechanism is provided on the push rod 23 for positioning the position of the piston 22.

[0070] The positioning mechanism includes a positioning block 24 and a fixed block 25. The fixed block 25 is fixed to the end of the push rod 23 away from the piston 22. The fixed block 25 is provided with a clearance groove 26 for the positioning block 24 to be inserted and slide. The outer wall of the outer tube 8 is provided with a spiral groove 27 for the positioning block 24 to be inserted. One end of the positioning block 24 is inserted into the clearance groove 26, and the other end of the positioning block 24 is inserted into the spiral groove 27.

[0071] In addition, an annular groove 28 is provided on the outer wall of the outer tube 8 at one side of the spiral groove 27 close to the inner tube 7, and the annular groove 28 is connected to the spiral groove 27. Through the provision of the annular groove 28, after the positioning block 24 moves along the spiral groove 27 to the annular groove 28, the airbag 20 is sufficiently expanded. At this time, since the outer tube 8 needs to continue to rotate, the provision of the annular groove 28 can, on the one hand, position the positioning block 24 to ensure the expansion degree of the airbag 20, and on the other hand, does not affect the rotation of the outer tube 8.

[0072] After the grouting is completed, in order to reset the positioning block 24, a pull rod 31 is fixedly connected to the end of the positioning block 24 away from the outer tube 8, and the end of the pull rod 31 away from the positioning block 24 passes through the end of the fixed block 25 away from the outer tube 8. The positioning block 24 can be pulled out of the annular groove 28 by the pull rod 31, and a spring 29 is sleeved on the pull rod 31. When the positioning block 24 is stuck in the spiral groove 27 or the annular groove 28, the spring 29 is not deformed.

[0073] At the same time, a second spring 30 is sleeved on the push rod 23. When the airbag 20 is not expanded, the second spring 30 is not deformed.

[0074] The present application discloses an implementation principle of Example 2 of a shield tunnel outer ring grouting reinforcement device: by rotating the outer tube 8, since the positioning block 24 is inserted in the spiral groove 27, the positioning block 24 is driven to move along the length direction of the outer tube 8, and then the piston 22 is pushed to move, and the airbag 20 is inflated to expand the airbag 20, so that during grouting, the front end of the outer tube 8 can be inserted into the grouting hole 32 on the pipe segment 4, and then when the outer tube 8 rotates to drive the inner tube 7 to rotate and slide, the positioning block 24 is driven to move, and the airbag 20 is expanded, so that the grouting hole 32 is sealed. During subsequent grouting, the sealing of the grouting hole 32 is guaranteed to prevent the slurry from overflowing from the grouting hole 32.

[0075] In addition, the grouting reinforcement layer 41 after the outer ring rotation grouting of the device is as follows Figure 8 shown.

[0076] Embodiment 3;

[0077] Reference Fig. 9The difference between this embodiment and embodiment 1 is that a grouting control system is provided on the grouting machine 3, and a small geological exploration device 38 (such as a geological radar, an acoustic wave detector, etc.) is integrated on the trolley 1 to obtain stratum information in real time. This information can be fed back to the grouting control system in real time, so that the grouting parameters can be automatically adjusted according to the changes in geological conditions, thereby realizing adaptive grouting;

[0078] In addition, a mixing box 40 and a grouting batching tank 39 are arranged on the trolley 1. The batching tank 39 conveys the ingredients required for the slurry to the mixing box 40 for mixing, and the mixing box 40 conveys the mixed slurry to the grouting machine 3; and a control valve is arranged on the discharge pipe of the batching tank 39, and various parameters and stratum deformation conditions in the grouting process are monitored in real time through the pressure sensor 37 and the flow sensor 36 on the grouting pipe 13, as well as the small geological exploration equipment 38. The monitoring data is transmitted to the control valve in real time. According to the real-time monitored data and changes in geological conditions, the ratio of the grouting material is automatically adjusted by accurately controlling parameters such as the water-cement ratio and the additive content, so as to ensure the stable quality of the grouting material and improve the grouting effect; at the same time, the monitoring data is transmitted to the control center or mobile terminal in real time, so as to facilitate the construction personnel to check and analyze in time and establish a feedback adjustment mechanism.

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shield tunnel outer ring grouting reinforcement device, comprising a trolley (1) and a grouting machine (3) arranged on the trolley (1), characterized in that: It also comprises a support frame (2) arranged on the trolley (1), a drill rod (6) for drilling holes in the soil layer being arranged on the support frame (2), a grouting channel (12) being provided on the drill rod (6) along its length direction, the grouting channel (12) penetrating the drill rod (6), and the output port of the grouting machine (3) being connected to the grouting channel (12) via a grouting pipe (13); the drill rod (6) comprises an outer tube (8) and an inner tube (7), the outer tube (8) being rotatably connected to the support frame (2), a driving member for driving the outer tube (8) to rotate being arranged on the support frame (2), the inner tube (7) being slidably arranged in the outer tube (8), and a power member being provided on the support frame (2), the power member being used to drive the inner tube (7) to slide along the length direction of the outer tube (8).

2. A shield tunnel outer ring grouting reinforcement device according to claim 1, characterized in that: The driving member adopts a rotary driver (9), a slider (11) is fixedly connected to the outer wall of the inner tube (7), a spiral groove (10) is opened on the inner wall of the outer tube (8) along its length direction, the slider (11) is inserted into the spiral groove (10) and can move along the path direction of the spiral groove (10), and the power member is a rotary driver (9), which drives the outer tube (8) to rotate through the rotary driver (9) to drive the inner tube (7) to slide.

3. The shield tunnel outer ring grouting reinforcement device according to claim 1 is characterized in that: The support frame (2) comprises a cylinder, the fixed end of the cylinder is fixedly connected to the trolley (1), the telescopic end of the cylinder is fixedly connected to a mounting seat (5), and the outer tube (8) is rotatably connected to the mounting seat (5).

4. The shield tunnel outer ring grouting reinforcement device according to claim 3 is characterized in that: The mounting seat (5) is rotatably connected to a rotating seat (16), the rotating axis of the rotating seat (16) being arranged along the axial direction of the pipe segment (4), the outer pipe (8) being rotatably arranged on the rotating seat (16), and the mounting seat (5) being provided with a second motor (18) for driving the rotating seat (16) to rotate.

5. The shield tunnel outer ring grouting reinforcement device according to claim 3 is characterized in that: The support frames (2) are arranged in pairs, and the two support frames (2) are each provided with a drill rod (6), and the two drill rods (6) are arranged symmetrically.

6. The shield tunnel outer ring grouting reinforcement device according to claim 1 is characterized in that: A grout outlet (15) connected to a grouting channel (12) is provided on a side wall of one end of the inner tube (7) away from the outer tube (8).

7. The shield tunnel outer ring grouting reinforcement device according to claim 1 is characterized in that: A pressure sensor (37) is installed on one end of the inner wall of the inner tube (7) away from the outer tube (8).

8. The shield tunnel outer ring grouting reinforcement device according to claim 1 is characterized in that: A flow sensor (36) is installed on the inner wall of the inner tube (7).

9. The shield tunnel outer ring grouting reinforcement device according to claim 1, characterized in that: A rotating drum (19) is mounted on the support frame (2), the rotating drum (19) is sleeved on the outer tube (8), a sealing airbag (20) is sleeved on the rotating drum (19), and an air injection mechanism for inflating the airbag (20) is provided on the rotating drum (19).

10. The shield tunnel outer ring grouting reinforcement device according to claim 9, characterized in that: The gas injection mechanism comprises a gas injection cylinder (21) and a piston (22); the gas injection cylinder (21) is fixed on the outer wall of the rotating cylinder (19); the gas injection cylinder (21) is connected to the air bag (20) through an air pipe (34); the piston (22) is arranged in the gas injection cylinder (21) and can move along the length direction of the gas injection cylinder (21); a push rod (23) is fixedly connected to the piston (22); a positioning mechanism for positioning the piston (22) is provided on the push rod (23); the positioning mechanism comprises a positioning block (24) and a fixing block (25); the fixing block (25) is fixed to the push rod (23) away from the piston (22) The outer tube (8) has one end, a clearance groove (26) for the positioning block (24) to be inserted and slide is formed on the fixed block (25), a spiral groove (27) for the positioning block (24) to be inserted is formed on the outer wall of the outer tube (8), one end of the positioning block (24) is inserted into the clearance groove (26), and the other end of the positioning block (24) is inserted into the spiral groove (27), an annular groove (28) is formed on the outer wall of the outer tube (8) at a side of the spiral groove (27) close to the inner tube (7), the annular groove (28) is connected to the spiral groove (27), and a spring (29) for driving the positioning block (24) to be inserted into the spiral groove (27) is formed on the fixed block (25).

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