A subway tunnel hole in-perturbation grouting reinforcement hydraulic pipe inserting machine

Abstract

The utility model discloses a subway tunnel hole inside micro disturbance grouting reinforcement hydraulic pipe inserting machine, include: base fixed structure, hydraulic telescopic mechanism, grouting pipe clamping mechanism, pipe inserting machine fixing frame, grouting safety device and grouting pipe. The subway tunnel hole inside micro disturbance grouting reinforcement hydraulic pipe inserting machine has the advantages of small size, light weight, simple and quick installation and disassembly, adopts the equipment to carry out the hole inside micro disturbance grouting reinforcement operation, can effectively reduce the construction personnel labor operation intensity, increases the construction operation face, reduces the lining structure deformation, settlement repair period, realizes more flexible, efficient structure deformation convergence and settlement repair reinforcement scheme.

Description

Technical Field

[0001] This utility model relates to the field of tunnel lining structure deformation repair technology, and in particular to a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside a subway tunnel. Background Technology

[0002] With economic development and the continuous increase in subway operating mileage, more and more construction projects are being built near subway lines, and the scale of these projects is also increasing, inevitably causing significant deformation of subway tunnels. In recent years, the micro-disturbance grouting method, as a technique with minimal impact on the surrounding environment, high controllability, and good reinforcement effect, has become an important means of repairing subway tunnel deformation.

[0003] Settlement and convergence deformation are of particular concern in subway tunnel deformation. The repair method for settlement deformation typically involves drilling a hole downwards from the bottom of the tunnel, penetrating the tunnel segments, and then inserting grouting pipes into the underlying soil to lift and grout the tunnel. The repair method for convergence deformation typically involves vertically inserting grouting pipes from the ground at a certain distance on both sides of the tunnel, grouting the tunnel laterally, and reducing the tunnel's transverse diameter through the lateral pressure of the grout.

[0004] Over time, subway tunnels undergo varying degrees of longitudinal deformation in certain sections, leading to issues such as track bed separation from tunnel segments and tunnel leakage. The factors causing longitudinal deformation are complex, including those from the tunnel construction phase, those occurring after subway operation, those inherent to the system itself, and those caused by changes in the surrounding environment. These factors primarily manifest as: inadequate planning during construction or potential hazards left unaddressed during tunnel boring machine (TBM) advancement; differential settlement caused by long-term train operation vibrations; the impact of hundreds of new construction, renovation, and expansion projects, as well as municipal engineering projects, on the subway structure within the subway safety protection zone; and the increasing number of subway tunnels and underground pipelines crossing existing operational tunnels, causing differential settlement and other problems. If differential settlement in operational tunnels is not controlled promptly and allowed to develop, it will compromise the operational safety of the subway.

[0005] Currently used grouting methods include compaction grouting, jet grouting, and fracturing grouting. Although their construction methods differ, they all only specify the grouting volume and pressure parameters, neglecting the fine-grained control of the grouting process. This may be sufficient for favorable geological or environmental conditions. Furthermore, existing grouting technologies often directly place holes at the location of a single protected object, failing to consider the complex surrounding environment. The hole placement is relatively simple, generally only considering the final grouting effect without addressing the disturbance during the grouting process, often leading to counterproductive results. Especially in situations with extremely high environmental protection requirements, particularly when deformation needs to be controlled within millimeter-level ranges, important parameters such as grouting flow rate, number of grouting cycles, and pipe extraction speed can generate significant self-disturbance. Therefore, the degree of precision in these parameters is crucial for achieving construction control objectives. Improper process control can often result in grouting methods intended for reinforcement causing greater disturbance to the geological formation, making it impossible to achieve control targets. This often necessitates the use of large-scale micro-disturbance grouting machinery, limiting the flexibility and efficiency of construction.

[0006] In conclusion, it is necessary to design a hydraulic pipe-inserting machine for micro-disturbance grouting reinforcement inside subway tunnels to solve the above problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is to address the issue of high operational intensity and low efficiency in micro-disturbance grouting construction inside subway tunnels, and to propose a new hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside subway tunnels.

[0008] To solve the above-mentioned technical problems, this utility model provides a hydraulic pipe insertion machine for micro-disturbance grouting reinforcement in subway tunnels, including: a base fixing structure, a hydraulic telescopic mechanism, a grouting pipe clamping mechanism, a pipe insertion machine fixing frame, a grouting safety device, and a grouting pipe;

[0009] The hydraulic telescopic mechanism includes two symmetrically arranged hydraulic telescopic cylinders. The hydraulic telescopic cylinders are bolted to the base fixing structure, and a cylinder piston rod is connected to the center of the cylinder. The cylinder piston rod is connected and fixed to the tube insertion machine fixing frame through the cylinder pin hole connecting rod.

[0010] The grouting pipe clamping mechanism includes a clamping device located between two hydraulic telescopic cylinders. The clamping device is threadedly connected to the hollow cylinder sleeve and welded to the clamping cylinder via a steel tie plate. A clamping sleeve is provided inside the clamping device. The clamping cylinder is connected to the hollow cylinder sleeve, and the other end of the hollow cylinder sleeve is threadedly connected to the clamping sleeve.

[0011] The insertion machine's mounting frame includes a mounting frame, the bottom of which is threadedly connected to a clamping cylinder, and its two sides are connected to a telescopic cylinder via cylinder pin holes; the overall support structure of the equipment during insertion and removal of the tube.

[0012] The grouting safety device is installed on the base fixing structure and includes a grouting orifice pipe, a ball valve, a grouting pressure relief pipe / anti-blowout device, and a sealing sleeve. The grouting orifice pipe is inserted into the grouting head through hole reserved in the center of the base fixing structure. One end of the ball valve is threaded to the grouting orifice pipe, and the other end is threaded to the grouting pressure relief pipe / anti-blowout device. When the pipe inserter inserts or removes the pipe / grouts, the ball valve is opened to keep the pipeline unobstructed. After grouting is completed, the ball valve is closed to keep the pipeline closed. One end of the grouting pressure relief pipe / anti-blowout device is threaded to the emergency ball valve. One end is threaded to the sealing sleeve, and a pressure relief hole is reserved on the surface. A pressure relief ball valve is installed in the pressure relief hole. When the grouting pressure exceeds the design value, the pressure relief ball valve is opened to perform a pressure relief operation. The sealing sleeve is threaded to the grouting pressure relief pipe / anti-gushing device. The hollow middle is a reserved channel for the grouting pipe. It plays a sealing role during the insertion and removal of the grouting pipe by the pipe inserter / micro-disturbance grouting reinforcement process to prevent the leakage of groundwater and grout behind the lining structure wall (preventing groundwater and grout from seeping out through the gap between the grouting pressure relief pipe and the grouting pipe).

[0013] The grouting pipe is equipped with a grouting plug at the front end, and 2-4 grout outlets are opened around the grouting plug. The external threaded connector at the rear end can be threaded to the next section of grouting pipe or high-pressure grouting hose. The high-pressure grouting hose is connected to the grouting backstage and the grouting pump. When inserting and pulling the pipe, the grouting pipe passes through the pipe inserting machine fixing frame, clamping cylinder, clamping device and grouting hole pipe and extends downward.

[0014] In a preferred embodiment of this solution, the base fixing structure includes two segmented bases connected by segmented fastening bolts, with a pre-drilled hole for the grouting head (orifice pipe) at the center. The bottom of the base fixing structure is placed flush with the surface of the scene micro-disturbance insertion and grouting structure, and serves as the overall support structure during the insertion and grouting process of the insertion machine.

[0015] Furthermore, the hydraulic telescopic cylinder is equipped with a telescopic cylinder port, one end of the hydraulic oil pipe is connected to the telescopic cylinder port, and the other end is connected to the hydraulic pump station, forming a closed loop of hydraulic oil, so that the hydraulic telescopic cylinder and the hydraulic pump station form a hydraulic station working system.

[0016] Furthermore, the clamping cylinder is equipped with a clamping cylinder port, one end of which is connected to the clamping cylinder port, and the other end is connected to an external hydraulic station. This forms a hydraulic station working system, enabling the hydraulic clamping device to complete the clamping action (the clamping force can be adjusted according to the insertion and extraction depth of the tube).

[0017] Furthermore, the grouting orifice pipe (grouting head) is 38cm long, with an outer diameter of 60mm, an inner diameter of 44mm, and a wall thickness of 8mm. One end of the orifice pipe is anchored inside the lining structure layer (segment), and the other end is threadedly connected to a ball valve. The lining structure (segment) has an opening diameter of 6cm and a drilling depth of 21cm. The pre-embedded orifice pipes are placed at 12 points along the segment in the track bed, anywhere, with an effective anchoring depth of not less than 20cm and an exposed length of 18cm.

[0018] Implementing this utility model has the following beneficial effects:

[0019] This hydraulic pipe-insertion machine for micro-disturbance grouting reinforcement in subway tunnels has the advantages of small size and lightweight, and is easy and quick to install and disassemble. Using this equipment for micro-disturbance grouting reinforcement in tunnels can effectively reduce the labor intensity of construction workers, increase the construction working surface, and reduce the deformation and settlement repair cycle of the lining structure, thus realizing a more flexible and efficient structural deformation convergence and settlement repair reinforcement solution. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 Schematic diagram of the structure of the hydraulic tube insertion machine for micro-disturbance grouting reinforcement inside subway tunnels provided by this utility model Figure 1 ;

[0022] Figure 2 Schematic diagram of the structure of the hydraulic tube insertion machine for micro-disturbance grouting reinforcement inside subway tunnels provided by this utility model Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of a shield tunnel.

[0024] In the diagram: 1. Segmented base; 2. Grouting head through hole; 3. Hydraulic telescopic cylinder; 4. Cylinder piston rod; 5. Pipe insertion machine fixing frame; 6. Cylinder pin hole connecting rod; 7. Clamping device; 8. Hollow cylinder sleeve; 9. Clamping cylinder; 10. Grouting orifice pipe; 11. Ball valve; 12. Grouting pipe; 13. Grouting outlet; 14. Telescopic cylinder port; 15. Clamping cylinder port; 16. Bolt; 17. Segmented fastening bolt; 18. Fastening thread; 19. Grouting pressure relief pipe / anti-spraying device; 20. Pressure relief hole; and 21. Sealing sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-2 , Figure 1 Schematic diagram of the structure of the hydraulic tube insertion machine for micro-disturbance grouting reinforcement inside subway tunnels provided by this utility model Figure 1 ; Figure 2 Schematic diagram of the structure of the hydraulic tube insertion machine for micro-disturbance grouting reinforcement inside subway tunnels provided by this utility model Figure 2 The hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside local subway tunnels includes: a base fixing structure, a hydraulic telescopic mechanism, a grouting pipe clamping mechanism, a pipe insertion machine fixing frame, a grouting safety device, and a grouting pipe.

[0027] The base fixing structure includes two segmented bases 1, which are connected by segmented fastening bolts 17, with a grouting head through hole 2 reserved at the center. The bottom of the base fixing structure is placed flat with the surface of the scene micro-disturbance insertion and grouting structure, and serves as the overall support structure during the insertion and grouting process of the insertion machine.

[0028] The hydraulic telescopic mechanism includes two symmetrically arranged hydraulic telescopic cylinders 3. The hydraulic telescopic cylinders 3 are connected to the base fixing structure by bolts 16. A cylinder piston rod 4 is centrally connected to the cylinder cylinder, and the cylinder piston rod 4 is connected and fixed to the tube insertion machine fixing frame 5 through a cylinder pin hole connecting rod 6. The hydraulic telescopic cylinder 3 is provided with a telescopic cylinder oil port 14. One end of the hydraulic oil pipe is connected to the telescopic cylinder oil port 14, and the other end is connected to the hydraulic pump station, forming a closed loop of hydraulic oil, so that the hydraulic telescopic cylinder and the hydraulic pump station form a hydraulic station working system.

[0029] The grouting pipe clamping mechanism includes a clamping device 7, located between two hydraulic telescopic cylinders 3. The clamping device 7 is threadedly connected to a hollow cylinder sleeve 8 and welded to a clamping cylinder 9 via a steel tie plate. A clamping sleeve is installed inside the clamping device 7. The clamping cylinder 9 is connected to the hollow cylinder sleeve 8, and the other end of the hollow cylinder sleeve 8 is threadedly connected to the clamping sleeve. The clamping cylinder 9 is equipped with a clamping cylinder port 15. One end of an oil pipe is connected to the clamping cylinder port 15, and the other end is connected to an external hydraulic station, forming a hydraulic station working system that enables the hydraulic clamping device to perform the clamping action (the clamping force can be adjusted according to the insertion and extraction depth of the pipe). The hollow cylinder sleeve 8 has a hollow structure in the middle, through which the grouting pipe passes, forming a grouting pipe insertion channel. During clamping operation, the clamping cylinder 9 moves up and down axially along the hollow cylinder sleeve 8. The clamping device 7 retracts its internal clamping sleeve to clamp the grouting pipe. After clamping the grouting pipe, it moves axially back and forth together with the clamping cylinder, the hollow cylinder sleeve, and the pipe insertion machine fixing frame. (When inserting or removing the grouting pipe, the clamping device clamps the grouting pipe and moves downward along the telescopic rod. After the grouting pipe reaches the insertion depth, when the piston rod moves to the minimum stroke, or when the piston rod moves to the maximum stroke, the clamping device releases tension, loosens the grouting pipe, and the clamping device, cylinder, hollow cylinder sleeve, and pipe insertion machine fixing frame move axially upward to the appropriate stroke position.)

[0030] The insertion machine fixing frame 5 includes a fixing frame, the bottom side of which is connected to the clamping cylinder 9 by a fastening thread 18, and its two sides are connected to the hydraulic telescopic cylinder 3 by connecting rods through cylinder pin holes; during the insertion and removal of tubes, the insertion machine fixing frame 5 is the supporting force-bearing structure of the entire equipment.

[0031] The grouting safety device is installed on the base fixing structure and includes a grouting orifice pipe 10, a ball valve 11, a grouting pressure relief pipe / anti-blowout device 19, and a sealing sleeve. The grouting orifice pipe 10 is inserted into the grouting head through hole 2 reserved in the center of the base fixing structure. One end of the ball valve 11 is threaded to the grouting orifice pipe 10, and the other end is threaded to the grouting pressure relief pipe / anti-blowout device. When the pipe inserter inserts or removes the pipe / grouts, the ball valve is opened to keep the pipeline unobstructed. After grouting is completed, the ball valve is closed to keep the pipeline closed. One end of the grouting pressure relief pipe / anti-blowout device 19 is threaded to the emergency ball valve, and the other end is threaded to the sealing sleeve 21. A pressure relief hole 20 is reserved on the surface, and a pressure relief ball valve is installed in the pressure relief hole. When the grouting pressure exceeds the design value, the pressure relief ball valve is opened for pressure relief. The sealing sleeve is threadedly connected to the grouting pressure relief pipe / anti-gushing device, with a hollow center serving as a reserved channel for the grouting pipe. During the insertion and removal of the grouting pipe by the pipe inserter / micro-disturbance grouting reinforcement process, it plays a sealing role, preventing the leakage of groundwater and grout behind the lining structure wall (preventing groundwater and grout from seeping through the gap between the grouting pressure relief pipe and the grouting pipe). In this embodiment, the grouting orifice pipe is 38cm long, with an outer diameter of 60mm, an inner diameter of 44mm, and a wall thickness of 8mm. One end of the orifice pipe is anchored inside the lining structure layer (segment), and the other end is threadedly connected to the ball valve. The lining structure (segment) has an opening diameter of 6cm and a drilling depth of 21cm. The pre-embedded orifice pipes are placed at 12 points along the segment in the track bed, allowing for a wider operating range. The effective anchoring depth of the orifice pipe is no less than 20cm, and the exposed length is 18cm. Please refer to [link to relevant documentation]. Figure 3 , Figure 3 This is a schematic diagram of the cross-sectional structure of a shield tunnel.

[0032] The front end of the grouting pipe 12 is equipped with a grouting plug, and 2-4 grout outlets 13 are opened around the grouting plug. The rear end external threaded connector can be threaded to the next section of grouting pipe or high-pressure grouting hose. The high-pressure grouting hose is connected to the grouting backstage and the grouting pump. When performing the pipe insertion and extraction operation, the grouting pipe passes through the pipe insertion machine fixing frame 5, the clamping cylinder 9, the clamping device 7, and the grouting orifice pipe 10 and extends downward.

[0033] During operation: Under the action of the hydraulic station working system composed of the telescopic cylinder and the external hydraulic station, the piston rod drives the grouting pipe clamping mechanism, the grouting pipe, and the pipe insertion machine fixing frame mechanism to move up and down (continuous and uniform telescopic movement); when the piston rod moves upward to the maximum stroke, the clamping device releases, and the grouting pipe passes through the hollow cylinder sleeve from the top of the fixing frame. The grouting pipe moves to a suitable position (ensuring that the grouting pipe and the orifice pipe are concentric, and the head of the grouting pipe is close to the grouting pressure relief pipe). The clamping device retracts to clamp the grouting pipe, and the piston rod continuously and uniformly retracts to move the pipe insertion machine downward to perform the pipe insertion operation; when the piston rod moves downward to the minimum stroke, the clamping device releases, and the next section of the grouting pipe passes through the hollow cylinder sleeve from the top of the fixing frame. The grouting pipe moves to a suitable position, and the clamping device retracts to lock the grouting pipe. The pipe insertion operation continues, repeating the above actions until the grouting pipe is inserted to the design elevation position. After the grouting backstage is ready, the micro-disturbance grouting operation is carried out. After grouting is completed, the hydraulic telescopic mechanism and clamping device work together to pull out the grout pipe (when the piston rod moves down to the minimum stroke, the clamping device clamps the grouting pipe, and the piston rod moves upward at a constant speed to pull out the pipe; when the piston rod moves upward to the maximum stroke, the clamping device releases, the piston rod moves down to the minimum stroke, the clamping device continues to clamp the grouting pipe, and the piston rod moves upward to pull out the pipe), until the grouting pipe is completely pulled out.

[0034] Hydraulic cannulation machine cannulation method:

[0035] (1) Preparatory work for micro-disturbance grouting (pre-embedded orifice pipe, orifice pipe pull-out test, water drilling to penetrate the pipe segment)

[0036] (2) Assemble the hydraulic pipe insertion machine: This hydraulic pipe insertion machine is driven by a double oil cylinder. The oil cylinder connection can be angled to adjust the verticality of the grouting pipe and ensure the coaxiality of the grouting pipe and the grouting hole pipe, thereby avoiding the problem of stuck drills during construction to a great extent. The base of the pipe insertion machine is fixed to the track bed with expansion bolts.

[0037] (3) Insertion and grouting: The piston rod of the telescopic cylinder extends and retracts to the appropriate stroke, the clamping sleeve of the clamping device of the clamping cylinder is in the relaxed state, the emergency ball valve is opened, and the grouting pipe is inserted to the appropriate position (appropriate position: the end plug of the grouting pipe is inserted into the bottom of the orifice); the clamping cylinder adjusts the clamping device, and the clamping sleeve retracts to clamp the grouting pipe; the telescopic cylinder and the hydraulic pump station system work together, and the piston rod moves downward along the axis (continuous and uniform telescopic movement). After the length of one grouting pipe is inserted, the above actions are repeated to continue the insertion operation until the insertion depth reaches the design depth.

[0038] Before formal grouting, water is injected to flush open the grouting channel. The pressure at the orifice pipe is observed during water injection. If the pressure is too high, grouting is stopped immediately. If the pressure is appropriate, grouting begins. Attention is paid to the grout mix ratio and grouting pressure. Grouting follows the principle of small amounts and multiple times. If the pressure is too high during grouting, grouting is stopped immediately, and changes in monitoring data are observed in real time.

[0039] During the grouting process, the grouting pipe moves up and down, and the grouting is done by going up and down back and forth to prevent the grouting pipe from getting stuck.

[0040] (4) Pull out the grouting pipe: After grouting is completed, slowly pull out the grouting pipe above the ball valve with the pipe inserter. Immediately close the ball valve first, then open the pressure relief pipe and pressure relief valve, and flush the pipeline with water. Then remove the grouting pressure relief pipe / anti-blowout device, ball valve, and sealing sleeve, and install the end cap above the orifice pipe.

[0041] Using this equipment for micro-disturbance grouting reinforcement in tunnels, its small size and lightweight design can effectively reduce the labor intensity of construction workers, thereby optimizing the deformation repair and reinforcement effect and improving construction efficiency.

[0042] In addition, this equipment can effectively reduce the labor intensity of construction workers, increase the construction work surface, and reduce the deformation and settlement repair cycle of the lining structure, thus realizing a more flexible and efficient structural deformation convergence and settlement repair and reinforcement solution.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic pipe-insertion machine for micro-disturbance grouting reinforcement inside subway tunnels, characterized in that, include: The base fixing structure, hydraulic telescopic mechanism, grouting pipe clamping mechanism, pipe insertion machine fixing frame, grouting safety device, and grouting pipe; The hydraulic telescopic mechanism includes two symmetrically arranged hydraulic telescopic cylinders. The hydraulic telescopic cylinders are bolted to the base fixing structure, and a cylinder piston rod is connected to the center of each cylinder. The cylinder piston rod is connected and fixed to the tube insertion machine fixing frame through a cylinder pin hole connecting rod. The grouting pipe clamping mechanism includes a clamping device located between the two hydraulic telescopic cylinders. The clamping device is threadedly connected to the hollow cylinder sleeve and welded to the clamping cylinder via a steel pull plate. A clamping sleeve is provided inside the clamping device. The clamping cylinder is connected to the hollow cylinder sleeve, and the other end of the hollow cylinder sleeve is threadedly connected to the clamping sleeve. The cannulation machine fixing frame includes a fixing frame, the bottom side of which is threadedly connected to the clamping cylinder, and its two sides are connected to the hydraulic telescopic cylinder through cylinder pin holes connecting rods. The grouting safety device is installed on the base fixing structure and includes a grouting orifice pipe, a ball valve, a grouting pressure relief pipe / anti-blowout device, and a sealing sleeve. The grouting orifice pipe is inserted into a grouting head through hole pre-reserved in the center of the base fixing structure. One end of the ball valve is threaded to the grouting orifice pipe, and the other end is threaded to the grouting pressure relief pipe / anti-blowout device. One end of the grouting pressure relief pipe / anti-blowout device is threaded to an emergency ball valve, and the other end is threaded to the sealing sleeve. A pressure relief hole is pre-reserved on its surface, and a pressure relief ball valve is installed in the pressure relief hole. The sealing sleeve is threaded to the grouting pressure relief pipe / anti-blowout device. The grouting pipe is equipped with a grouting plug at the front end, and 2-4 grout outlets are opened around the grouting plug. The rear end external threaded connector can be threaded to the next section of grouting pipe or high-pressure grouting hose. The high-pressure grouting hose is connected to the grout mixing backstage and the grouting pump. When performing the pipe insertion and extraction operation, the grouting pipe passes through the pipe insertion machine fixing frame, clamping cylinder, clamping device and grouting orifice pipe and extends downward.

2. The hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside subway tunnels according to claim 1, characterized in that, The base fixing structure includes two segmented bases, which are connected by segmented fastening bolts, with a grouting head through hole reserved at the center.

3. The hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside subway tunnels according to claim 1, characterized in that, The hydraulic telescopic cylinder is equipped with a telescopic cylinder port, and one end of the hydraulic oil pipe is connected to the telescopic cylinder port, while the other end is connected to the hydraulic pump station.

4. The hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside subway tunnels according to claim 1, characterized in that, The clamping cylinder is equipped with a clamping cylinder port, and one end of the oil pipe is connected to the clamping cylinder port, while the other end is connected to an external hydraulic station.

5. The hydraulic pipe insertion machine for micro-disturbance grouting reinforcement inside subway tunnels according to claim 1, characterized in that, The grouting orifice pipe is 38cm long, 60mm in outer diameter, 44mm in inner diameter, and 8mm in wall thickness. One end of the orifice pipe is anchored inside the lining structure layer, and the other end is threadedly connected to the ball valve.

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