Underground tunnel local damage repairing device

Abstract

The invention provides an underground tunnel local damage repairing device which comprises a drill rod, the drill rod is of a hollow structure, a spiral blade is arranged on the drill rod, and a first liquid conveying pipeline and a second liquid conveying pipeline which are used for conveying rapid hardening liquid are arranged in the drill rod; the liquid outlet end of the first liquid conveying pipeline extends to the position close to the drill bit and is fixedly connected with the side wall of the drill rod, a one-way valve is arranged on the first liquid conveying pipeline, and rapid hardening liquid can be conveyed out of the drill rod in a one-way mode through the first liquid conveying pipeline; the drill rod comprises a hot melting section, the side wall, distributed on the hot melting section, of the drill rod is made of a hot melting material and connected with a hot melting cable, a bag folded into multiple layers is arranged in the hot melting section of the drill rod, the liquid outlet end of the second liquid conveying pipeline is communicated with the bag, and rapid hardening liquid can be conveyed into the bag through the second liquid conveying pipeline. According to the device, the quick-setting liquid can be output from the top of the drill rod, underground water is prevented from entering a pipeline to generate sudden surging, the quick-setting liquid is secondarily conveyed to enable the bag to abut against the damaged position of the tunnel, and the damaged position can be permanently plugged after solidification and hardening.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel repair, and relates to a device for repairing local damage of an underground tunnel. Background Art

[0002] With the acceleration of urbanization, the construction scale of subway systems and various underground construction facilities is becoming increasingly large and complex. These underground structures not only undertake important functions such as urban transportation, water supply and drainage, and energy transmission, but also face challenges such as changeable geological environment and difficult construction. Especially in the subsequent underground space development, geological exploration and other operations, due to unstable geological conditions or improper construction operations, the existing underground tunnel structures often suffer varying degrees of damage. For example, during geological exploration in a certain city, drilling equipment was used to drill directly into the tunnel, causing lining cracks. These damages may manifest as cracks, leakage or structural deformation. In severe cases, it may even cause external water and soil to directly enter the tunnel structure, which not only affects the normal use of the tunnel, but may also further aggravate the scope of structural failure, posing a serious threat to the safety and stability of the underground space.

[0003] In order to repair the damage of underground tunnels, the industry has developed a variety of repair methods, such as point-shaped in-situ curing method, UV curing repair, spraying method and winding method. Although these methods can restore the structural strength of the tunnel to a certain extent, they cannot maintain a long-term repair effect when the water pressure outside the tunnel is high, and the sudden surge generated at the damaged part of the tunnel will make construction difficult. Drawing on the lining repair method and expansion ring repair technology in small-diameter pipeline repair technology, these methods usually require measures to be taken on the entire circumference of the tunnel, regardless of whether the damage is limited to a certain part, which undoubtedly leads to a lot of unnecessary waste of materials and increased labor costs.

[0004] In view of the severity of the underground tunnel damage problem and the limitations of existing repair technologies in dealing with local damage, it is urgent to develop a more targeted, efficient and safe underground tunnel local damage repair device to ensure rapid local repair of underground tunnels while reducing material waste and labor costs. Summary of the invention

[0005] In order to overcome the problems existing in the prior art, the present invention provides a device for repairing local damage of an underground tunnel.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a local damage repair device for an underground tunnel, comprising a drill rod, which is a hollow structure; a drill bit is arranged at one end of the drill rod, and the other end is connected to a rotating drive motor; a first infusion pipeline and a second infusion pipeline for conveying a quick-setting liquid are arranged inside the drill rod; the liquid outlet end of the first infusion pipeline extends to near the drill bit, is fixedly connected to a side wall of the drill rod, and a one-way valve is arranged on the first infusion pipeline, so that the quick-setting liquid can be unidirectionally conveyed to the outside of the drill rod through the first infusion pipeline; the drill rod comprises a hot-melt section, and the side wall of the drill rod distributed in the hot-melt section is made of hot-melt material and is connected to a hot-melt cable; a folded multi-layer sac is arranged inside the hot-melt section of the drill rod, and the liquid outlet end of the second infusion pipeline is connected to the sac, so that the quick-setting liquid can be conveyed into the sac through the second infusion pipeline.

[0008] Furthermore, the first infusion pipeline includes an infusion tube and several horizontal tubes; one end of the infusion tube is connected to the hydraulic pump, and the other end passes through the side wall of the drill pipe into the drill pipe and is connected to the several horizontal tubes, and the infusion tube is connected to each horizontal tube; the horizontal tubes are distributed near the drill bit, pass through the side wall of the drill pipe to communicate with the outside world, and a one-way valve is respectively arranged in each horizontal tube.

[0009] Furthermore, the one-way valve includes a hollow shell, a spring base, a spring, an elastic needle core and a bracket; the hollow shell is fixed inside the first infusion pipeline, and both ends of the hollow shell are open, namely a liquid inlet end and a liquid outlet end; the bracket is fixed at the liquid outlet end of the hollow shell, and the bracket is perpendicular to the axis of the hollow shell; the spring base is fixed on the side of the bracket facing the liquid inlet end; the spring and the elastic needle core are both arranged inside the hollow shell, one end of the spring is connected to the spring base, and the other end is connected to the elastic needle core; the elastic needle core is adapted to the liquid inlet of the liquid inlet end of the hollow shell, and the equivalent diameter of the elastic needle core is smaller than the inner diameter of the hollow shell.

[0010] Furthermore, the outer wall of the hollow shell is provided with a plurality of insert teeth, and correspondingly, the inner wall of the first infusion pipeline is provided with a plurality of slots adapted to the insert teeth, and the insert teeth are inserted into the slots to achieve relative fixation of the hollow shell and the first infusion pipeline.

[0011] Furthermore, an upper bottom plate and a lower bottom plate are provided inside the drill rod; the upper bottom plate is distributed above the hot melt section and is fixedly connected to the inner wall of the drill rod; the lower bottom plate is distributed below the hot melt section and is fixedly connected to the inner wall of the drill rod, and the bag is provided between the upper bottom plate and the lower bottom plate; one end of the second fluid infusion pipe is connected to the hydraulic pump, and the other end passes through the side wall of the drill rod into the interior of the drill rod, and passes through the lower bottom plate to communicate with the bag; the upper bottom plate and the lower bottom plate are respectively provided with through holes adapted to the first fluid infusion pipe, and the first fluid infusion pipe passes through the through holes and is fixedly connected to the upper bottom plate and the lower bottom plate.

[0012] Furthermore, a cable partition is fixedly installed inside the drill rod, and a cable groove is provided on the side wall of the drill rod; one end of the hot melt cable is connected to the power supply, and the other end passes through the cable groove and the gap between the cable partition and the inner wall of the drill rod to be connected to the hot melt section.

[0013] Furthermore, the device is also provided with a drill rod supplement section, the drill rod supplement section is provided with an external thread, the drill rod is provided with an internal thread, one end of the drill rod supplement section is fixedly connected to the drill rod thread, and the other end is fixedly connected to the driving end of the rotary drive motor.

[0014] Furthermore, the device is also provided with a supporting mechanism; the supporting mechanism includes a supporting plate, two bases and two supporting rods; the two bases are respectively fixed on the surface of the tunnel lining, and the two bases are symmetrically distributed on both sides of the drill rod; the two support rods are symmetrically distributed on both sides of the drill rod, and one end of the support rod is connected to the base, and the other end is connected to the support plate; the rotary drive motor is arranged on the support plate.

[0015] Furthermore, a vacuum suction cup is provided on one side of the base connected to the tunnel lining, and the vacuum suction cup is connected to an air pump through an air suction pipe.

[0016] Furthermore, the outer wall of the drill pipe is provided with spiral blades.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention designs a device for repairing local damage in an underground tunnel. The one-way valve is installed in the horizontal section of the first fluid delivery pipeline. The one-way valve can keep the pipeline in a sealed state when no liquid is delivered to the first fluid delivery pipeline. After the condensate arrives, it flows out of the top of the drill pipe under the action of hydraulic pressure, and the groundwater in the outer soil layer is quickly solidified. The combination of the cross bracket and the spring base gives the spring needle core a reaction force without hindering the outflow of the condensate. Compared with ordinary repair devices, the design of the one-way valve plus the quick-setting liquid can solve the problem of sudden surge caused by external groundwater entering the pipeline after local damage to the tunnel.

[0019] (2) The present invention is a device for repairing local damage in an underground tunnel. A hot-melt section is designed in the drill rod, which can achieve hot melting under the hot-melt cable. By injecting quick-setting liquid into a folded multi-layer bag placed therein, the bag expands and supports the damaged position of the tunnel from the outside. As the quick-setting liquid in the bag solidifies and hardens, the damaged tunnel is permanently sealed.

[0020] (3) The present invention is a device for repairing local damage in underground tunnels. The threaded connection between the drill rod and the drill rod extension section enables a drill rod with a length equal to the thickness of the tunnel lining to be drilled into the damaged part of the tunnel. The first and second fluid delivery pipelines inside the drill rod are connected to the hydraulic pump through a pipeline connector. After the construction is completed, the redundant drill rod supplementary section, the pipeline at the hydraulic pump, the base, the support rod and other structures can be disassembled, and the construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of a drill rod in a device for repairing local damage in an underground tunnel according to an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional view of a one-way valve in a local damage repair device for an underground tunnel according to an embodiment of the present invention under a rapid setting hydraulic pressure;

[0023] Figure 3 This is a cross-sectional view of the drill rod AA in the underground tunnel local damage repair device according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of a drill rod breaking through the outer wall of the lining in the local damage repair device for an underground tunnel according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the hot melt section of the drill rod in the underground tunnel local damage repair device according to an embodiment of the present invention entering the tunnel;

[0026] Figure 6 This is a schematic diagram of the underground tunnel local damage repair device after the drill rod supplementary section is taken out according to the embodiment of the present invention;

[0027] The symbols in the accompanying drawings are:

[0028] 1. Drill pipe; 2. Spiral blade; 3. First infusion pipeline; 4. One-way valve; 41. Spring base; 42. Spring; 43. Elastic needle core; 44. Bracket; 45. Hollow shell; 5. Upper bottom plate; 6. Lower top plate; 7. Diagonal support; 8. Hot melt section; 9. Bag; 10. Second infusion pipeline; 11. Hot melt cable; 12. Cable partition; 13. Internal thread; 14. Drill pipe supplementary section; 15. External thread; 16. Rotary drive motor; 17. Support rod; 18. Base; 19. Vacuum suction cup; 20. Vacuum pipe; 21. Vacuum pump; 22. Hydraulic pump; 24. Pipeline connector; 25. Power supply; 26. Motor cable; 27. Tunnel lining. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 4 As shown, the present invention provides a local damage repair device for an underground tunnel, comprising a drill rod 1, the drill rod 1 is a hollow structure, and a spiral blade 2 is arranged on the outer wall of the drill rod 1. A drill bit is arranged at one end of the drill rod 1, and a rotary drive motor 16 is connected to the other end. The rotary drive motor 16 can drive the drill rod 1 to break through the local damage position of the tunnel and enter the soil layer outside the pipeline.

[0031] like Figure 1 As shown, a first fluid delivery pipeline 3 for delivering quick-setting liquid is provided in the drill rod 1, and the liquid outlet end of the first fluid delivery pipeline 3 extends to near the drill bit, is fixedly connected to the side wall of the drill rod 1, and is communicated with the outside world. A one-way valve 4 is provided on the first fluid delivery pipeline 3, and the quick-setting liquid can be unidirectionally delivered to the outside of the drill rod 1 through the first fluid delivery pipeline 3.

[0032] More specifically, Figure 3 As shown, the first fluid delivery pipeline 3 includes a fluid delivery pipe and four horizontal pipes (all of which are steel pipes), one end of the fluid delivery pipe is connected to the hydraulic pump 22, and the other end passes through the side wall of the drill rod 1 to enter the inside of the drill rod 1 and is connected to the four horizontal pipes, and the fluid delivery pipe is connected to each horizontal pipe. The horizontal pipes are distributed near the drill bit, pass through the side wall of the drill rod 1 to communicate with the outside, and the horizontal pipes are fixed to the drill rod 1. A one-way valve 4 is respectively arranged in each horizontal pipe. The one-way valve 4 can prevent the outer groundwater from entering the pipeline when the drill rod 1 breaks through the outer layer of the tunnel lining, thereby preventing the adverse effect of sudden surge.

[0033] like Figures 1-2 As shown, as a further preferred embodiment of the present invention, the one-way valve 4 includes a hollow shell 45, a spring base 41, a spring 42, an elastic needle core 43 and a bracket 44. The hollow shell 45 is fixed inside the first infusion pipeline 3, and the two ends of the hollow shell 45 are open, which are the liquid inlet end and the liquid outlet end respectively. The bracket 44 is in a "cross" structure, fixed at the liquid outlet end of the hollow shell 45, and the bracket 44 is perpendicular to the axis of the hollow shell 45, and the bracket 44 will not affect the quick-setting liquid from flowing out to the outer soil layer. The spring base 41 is fixed on the side of the bracket 44 facing the liquid inlet end. The spring 42 and the elastic needle core 43 are both arranged inside the hollow shell 45, one end of the spring 42 is connected to the spring base 41, and the other end is connected to the elastic needle core 43, the elastic needle core 43 is adapted to the liquid inlet of the liquid inlet end of the hollow shell 45, and the equivalent diameter of the elastic needle core 43 is smaller than the inner diameter of the hollow shell 45.

[0034] When the drill rod 1 breaks through the outer wall of the tunnel lining 27, the hydraulic pump 22 delivers quick-setting liquid to the first hydraulic pipeline 3. When the quick-setting liquid reaches the four horizontal tubes of the first liquid delivery pipeline 3, under the action of the hydraulic pressure, the elastic needle core 43 is squeezed to move toward the spring 42 side, the elastic needle core 43 is separated from the liquid inlet, the spring 42 contracts, and the quick-setting liquid flows to the outside of the tunnel through the channel left by the movement of the elastic needle core 43, thereby quickly solidifying the groundwater in the outer soil layer and preventing the groundwater from entering the pipeline and causing a sudden surge. When the quick-setting liquid is introduced, the liquid pressure disappears, the spring 42 recovers its deformation and drives the elastic needle core 43 to move toward the liquid inlet, so that the elastic needle core 43 fits with the liquid inlet, and the liquid inlet is completely closed to prevent the outer groundwater from entering the pipeline.

[0035] like Figures 1-2 As shown, the outer wall of the hollow shell 45 is provided with a plurality of insert teeth, and correspondingly, the inner wall of the first infusion pipeline 3 is provided with a plurality of slots adapted to the insert teeth, and the insert teeth are inserted into the slots to achieve relative fixation of the hollow shell 45 and the first infusion pipeline 3.

[0036] like Figure 1 and Figures 4 to 6 As shown, in order to achieve permanent plugging of the local damage of the underground tunnel, a section of the inner wall of the drill rod 1 is composed of a hot melt section 8, and the side wall of the drill rod 1 distributed in the hot melt section 8 is a hot melt material, which is connected to the hot melt cable 11. After power is turned on, the side wall of the drill rod 1 distributed in the hot melt section 8 can be heated and melted. A folded multi-layer bag 9 is arranged inside the hot melt section 8 of the drill rod 1. A second infusion pipeline 10 for conveying quick-setting liquid is arranged inside the drill rod 1, and the liquid outlet end of the second infusion pipeline 10 is connected to the bag 9, and the quick-setting liquid can be conveyed to the bag 9 through the second infusion pipeline 10.

[0037] More specifically, the drill rod 1 is provided with an upper bottom plate 5 and a lower bottom plate 6. The upper bottom plate 5 is arranged above the hot melt section 8 and is fixedly connected to the inner wall of the drill rod 1. The lower bottom plate 6 is arranged below the hot melt section 8 and is fixedly connected to the inner wall of the drill rod 1. The upper part of the upper top plate 5 and the lower part of the lower bottom plate 6 are both welded with diagonal braces 7 to achieve auxiliary fixation. The bladder 9 is arranged between the upper bottom plate 5 and the lower bottom plate 6. One end of the second liquid infusion pipeline 10 is connected to the hydraulic pump 22, and the other end passes through the side wall of the drill rod 1 to enter the inside of the drill rod 1, and passes through the lower bottom plate 6 to communicate with the bladder 9. In addition, the upper bottom plate 5 and the lower bottom plate 6 are respectively provided with through holes adapted to the first liquid infusion pipeline 3. The first liquid infusion pipeline 3 can pass through the through holes and be fixedly connected to the upper bottom plate 5 and the lower bottom plate 6.

[0038] like Figure 1As shown, as a further preference of the present invention, a cable partition 12 is fixedly provided inside the drill rod 1, and a cable groove is provided on the side wall of the drill rod 1, one end of the hot melt cable 11 is connected to the power supply 25, and the other end passes through the cable groove and the gap between the cable partition 12 and the inner wall of the drill rod 1, and is connected to the hot melt section 8.

[0039] like Figure 5 As shown, when the hot melt section 8 of the drill rod 1 enters the outside of the tunnel, the hot melt cable 11 is controlled by the power supply to melt the hot melt section 8 in the probe rod 1, and then the quick-setting liquid is injected into the second liquid delivery pipeline 10 through the hydraulic pump 22. The quick-setting liquid fills the bladder 9 and gradually expands. Under the blocking effect of the upper bottom plate 5 and the lower top plate 6, the bladder 9 expands into the outer soil and supports the damaged position of the tunnel from the outside. As the slurry in the bladder 9 hardens, permanent blocking is achieved.

[0040] like Figures 4 to 6 As shown, as a further preferred embodiment of the present invention, the device is further provided with a drill rod supplementary section 14, the top of which is provided with an external thread 15, the tail of the drill rod 1 is provided with an internal thread 13, the external thread 15 matches the internal thread 13, the drill rod supplementary section 14 is threadedly fixedly connected to the drill rod 1, and the other end of the drill rod supplementary section 14 is fixedly connected to the driving end of the rotary drive motor 16. Under the rotation of the rotary drive motor 16, the spiral blades 2 welded on the outer wall of the drill rod 1 can enable the drill rod 1 to drill into the local damaged part of the underground tunnel more quickly.

[0041] like Figures 4 to 6 As shown, as a further preferred embodiment of the present invention, the device is further provided with a support mechanism, which includes a support plate, two bases 18 and two support rods 17. The two bases 18 are respectively fixed on the surface of the tunnel lining 27, and the two bases 18 are symmetrically distributed on both sides of the drill rod 1. The two support rods 17 are symmetrically distributed on both sides of the drill rod 1, and one end of the support rod 17 is connected to the base 18, and the other end is connected to the support plate. The rotary drive motor 16 is arranged on the support plate, and the rotary drive motor 16 can move along the axis direction of the drill rod 1.

[0042] More specifically, a vacuum suction cup 19 is provided on one side of the base 18 connected to the tunnel lining 27, which can be adsorbed on the tunnel lining 27. The vacuum suction cup 19 is connected to a vacuum pump 21 through a vacuum pipe 20. The vacuum pump 21 can evacuate the vacuum suction cup 18 through the vacuum pipe 20, so that the base can be firmly adsorbed on the inner wall of the damaged part of the tunnel.

[0043] Application method of the present invention:

[0044] S1: Place the base on the inner wall of the tunnel lining at the damaged part, and use the vacuum pump, vacuum pipe and vacuum suction cup to firmly adsorb the base to the inner wall of the lining; install the drill rod supplementary section on the motor, and after the drill rod and the drill rod supplementary section are threadedly connected, start the motor, and the drill rod breaks through the damaged part and enters the soil layer outside the pipeline.

[0045] S2: When the drill rod breaks through the outer wall of the lining, the hydraulic pump inputs quick-setting liquid into the first fluid delivery pipeline. Under the action of the hydraulic pressure, the elastic needle core in the one-way valve contracts toward the spring side, and the quick-setting liquid passes through and flows out to the outer soil layer, quickly solidifying the groundwater in the outer soil layer.

[0046] S3: When the hot-melt section of the drill pipe enters the outside of the tunnel, the power source controls the hot-melt cable to melt the hot-melt section, and the hydraulic pump injects quick-setting liquid into the bag through the second infusion pipeline. The quick-setting liquid in the bag gradually increases, and the bag expands toward the outer soil. As the quick-setting liquid solidifies, the damaged part is permanently sealed.

[0047] S4: Rotate the motor in the reverse direction to unscrew the drill rod extension section to separate it from the drill rod, unload the drill rod extension section from the motor, remove the first and second fluid delivery pipelines from the pipeline connector, remove the support mechanism, and complete the construction.

[0048] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A device for repairing local damage in an underground tunnel, characterized in that: The drill rod (1) comprises a drill pipe (1) having a hollow structure; a drill bit is arranged at one end of the drill pipe (1), and the other end is connected to a rotation drive motor (16); The drill rod (1) is provided with a first fluid delivery pipeline (3) and a second fluid delivery pipeline (10) for delivering quick-setting fluid; The liquid outlet end of the first liquid delivery pipeline (3) extends to near the drill bit and is fixedly connected to the side wall of the drill rod (1), and a one-way valve (4) is provided on the first liquid delivery pipeline (3), so that the quick-setting liquid can be unidirectionally delivered to the outside of the drill rod (1) through the first liquid delivery pipeline (3); The drill rod (1) comprises a hot melt section (8), and the side wall of the drill rod (1) distributed in the hot melt section (8) is made of hot melt material and is connected to a hot melt cable (11); a folded multi-layer sac (9) is arranged inside the hot melt section (8) of the drill rod (1), and the liquid outlet end of the second liquid infusion pipeline (10) is connected to the sac (9), and the quick-setting liquid can be transported into the sac (9) through the second liquid infusion pipeline (10).

2. The underground tunnel partial damage repair device according to claim 1, characterized in that: The first infusion pipeline (3) comprises an infusion tube and a plurality of horizontal tubes; One end of the liquid infusion tube is connected to the hydraulic pump (22), and the other end passes through the side wall of the drill rod (1) into the interior of the drill rod (1) and is connected to a plurality of horizontal tubes, and the liquid infusion tube is in communication with each of the horizontal tubes; The horizontal pipes are distributed near the drill bit, pass through the side wall of the drill rod (1) and communicate with the outside world, and a one-way valve (4) is arranged in each horizontal pipe.

3. The underground tunnel partial damage repair device according to claim 2, characterized in that: The one-way valve (4) comprises a hollow housing (45), a spring base (41), a spring (42), an elastic needle core (43) and a bracket (44); The hollow shell (45) is fixed inside the first infusion pipeline (3), and the two ends of the hollow shell (45) are open, namely, a liquid inlet end and a liquid outlet end; the bracket (44) is fixed to the liquid outlet end of the hollow shell (45), and the bracket (44) is perpendicular to the axis of the hollow shell (45); the spring base (41) is fixed to the side of the bracket (44) facing the liquid inlet end; the spring (42) and the elastic needle core (43) are both arranged inside the hollow shell (45), one end of the spring (42) is connected to the spring base (41), and the other end is connected to the elastic needle core (43); The elastic needle core (43) is adapted to the liquid inlet of the liquid inlet end of the hollow shell (45), and the equivalent diameter of the elastic needle core (43) is smaller than the inner diameter of the hollow shell (45).

4. The underground tunnel partial damage repair device according to claim 3, characterized in that: The outer wall of the hollow shell (45) is provided with a plurality of insert teeth, and correspondingly, the inner wall of the first infusion pipeline (3) is provided with a plurality of slots adapted to the insert teeth, and the insert teeth are inserted into the slots to achieve relative fixation of the hollow shell (45) and the first infusion pipeline (3).

5. The underground tunnel partial damage repair device according to claim 1, characterized in that: An upper bottom plate (5) and a lower bottom plate (6) are provided inside the drill rod (1); The upper bottom plate (5) is distributed above the hot melt section (8) and is fixedly connected to the inner wall of the drill rod (1); the lower bottom plate (6) is distributed below the hot melt section (8) and is fixedly connected to the inner wall of the drill rod (1); the bag (9) is arranged between the upper bottom plate (5) and the lower bottom plate (6); One end of the second liquid delivery pipeline (10) is connected to the hydraulic pump (22), and the other end passes through the side wall of the drill rod (1) to enter the interior of the drill rod (1), and passes through the lower end bottom plate (6) to communicate with the bladder (9); The upper bottom plate (5) and the lower bottom plate (6) are respectively provided with through holes adapted to the first liquid infusion pipeline (3); the first liquid infusion pipeline (3) passes through the through holes and is fixedly connected to the upper bottom plate (5) and the lower bottom plate (6).

6. The underground tunnel partial damage repair device according to claim 1, characterized in that: A cable partition (12) is fixedly arranged inside the drill rod (1), and a cable groove is arranged on the side wall of the drill rod (1); One end of the hot-melt cable (11) is connected to the power source (25), and the other end passes through the cable groove and the gap between the cable partition (12) and the inner wall of the drill rod (1) to be connected to the hot-melt section (8).

7. The underground tunnel partial damage repair device according to claim 1, characterized in that: A drill rod supplement section (14) is also provided. The drill rod supplement section (14) is provided with an external thread (15). The drill rod (1) is provided with an internal thread (13). One end of the drill rod supplement section (14) is fixedly connected to the drill rod (1) by thread, and the other end is fixedly connected to the driving end of a rotary drive motor (16).

8. The underground tunnel partial damage repair device according to claim 1, characterized in that: A supporting mechanism is also provided; The support mechanism comprises a support plate, two bases (18) and two support rods (17); The two bases (18) are respectively fixed on the surface of the tunnel lining (27), and the two bases (18) are symmetrically distributed on both sides of the drill rod (1); the two support rods (17) are symmetrically distributed on both sides of the drill rod (1), and one end of the support rod (17) is connected to the base (18) and the other end is connected to the support plate; The rotary drive motor (16) is arranged on the support plate.

9. The underground tunnel partial damage repair device according to claim 8, characterized in that: A vacuum suction cup (19) is provided on one side of the base (18) connected to the tunnel lining (27), and the vacuum suction cup (19) is connected to an air pump (21) via an air extraction pipe (20).

10. The underground tunnel partial damage repair device according to claim 1, characterized in that: The outer wall of the drill rod (1) is provided with spiral blades (2).

Images