A lining support structure for large deformation tunnels in soft rock and its application method

Abstract

This invention belongs to the field of tunnel lining support technology, specifically a soft rock large deformation tunnel lining support structure and its application method. It includes a set of lining part one, with lining part two fixedly installed on the surface of each lining part. A set of installation cavities is formed on the surface of each lining part one, located in the gap between adjacent lining parts two. A set of pressure switches is fixedly installed on the inner wall of each installation cavity one. A flashing light is fixedly installed on the lower surface of each lining part two. When a water-swellable strip expands, it contacts and presses against the pressure switch. When the pressure switch is pressed, the flashing light is activated, emitting an alarm sound and flashing a light to alert workers of the leak, allowing for rapid maintenance. Furthermore, the water-swellable strip can pre-seal the gap between the lining parts two to a certain extent, reducing seepage and preventing large-scale seepage from affecting the safety of the tunnel.

Description

Technical Field

[0001] This invention belongs to the field of tunnel lining support technology, specifically a soft rock large deformation tunnel lining support structure and its application method. Background Technology

[0002] With the continuous development and expansion of highway construction in my country, long and deep tunnels with various geological conditions are gradually increasing. Especially in the mountainous areas of the southwest, more and more tunnel projects are being built near or through earthquake fault zones, where engineering conditions are harsh, fault activity is frequent, and these areas are characterized by high intensity and high ground stress. Large deformation problems often occur in the surrounding rock of schist, phyllite, soft clay layers, strongly weathered tuff, mudstone, fracture zones, and mineralized metamorphic clay. When tunnels in weak surrounding rock undergo large deformations under the combined effects of high ground stress and rock mass expansibility, it can lead to tunnel collapse.

[0003] Regarding existing related technologies, the inventors believe that the following defects often exist: Currently, after the lining of soft rock large deformation tunnels, because the lining structure is block lining, there will be gaps between the blocks. Furthermore, because the structure of the soft surrounding rock is more loose, its water permeability is stronger. When soft rock seeps into the tunnel, the seeping water will affect the stability of the tunnel environment and pose a safety hazard.

[0004] Therefore, the present invention provides a lining support structure for large deformation tunnels in soft rock and its application method. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: The soft rock large deformation tunnel lining support structure of this invention includes a set of lining part one, on the surface of each lining part two fixedly installed, and a set of installation cavities one opened on the surface of each lining part two. The installation cavities one is located in the gap between adjacent lining parts two, and a set of pressure switches is fixedly installed on the inner wall of the installation cavities one. A flashing light (which flashes continuously and emits an alarm sound) is fixedly installed on the lower surface of each lining part two, and a water-swellable strip is fixedly installed on the inner wall of the installation cavities one. Currently, after lining soft rock large deformation tunnels, because the lining structure is block lining, gaps exist between the blocks, and the weak surrounding rock, due to its looser structure, has stronger water permeability. When soft rock seeps into the tunnel, the permeation... Water can affect the stability of the tunnel environment and pose safety hazards. To prevent large deformations in soft rock tunnels under the combined effects of high ground stress and rock expansibility, lining section one and lining section two are supported within the soft rock tunnel. When water seeps from the tunnel ceiling and enters the tunnel through the gap between lining section two, the water comes into contact with the water-swellable strip. The water-swellable strip then expands laterally within installation cavity one. After the water-swellable strip expands, it contacts and compresses the pressure switch. When the pressure switch is compressed, a flashing light is activated, emitting an alarm sound and flashing a light to alert staff of the leak, allowing for rapid maintenance. Furthermore, the water-swellable strip can pre-seal the space between lining section two to a certain extent, reducing the amount of water seepage and preventing large amounts of water from affecting the safety of the tunnel.

[0007] Preferably, a set of mounting cavities is formed on the surface of the second lining section. A set of A-type plastic bags and a set of B-type plastic bags are fixedly installed inside the second mounting cavity. A set of sliding grooves is formed on the inner wall of the first mounting cavity. A slider is slidably installed on the inner wall of each sliding groove. A cutter is fixedly installed on the lower surface of each slider. The cutter is located inside the second mounting cavity. The slider abuts against the surface of the water-swellable strip. When the water-swellable strip expands, it will drive the slider that abuts against it to move. The slider moves towards the pressure switch and drives the cutter to cut the A-type and B-type plastic bags. After the A-type and B-type plastic bags are cut open, the A-type and B-type plastics inside flow out in the second mounting cavity, mix, and dry between the second lining section, sealing the seepage point between the second lining section and preventing water from seeping into the tunnel.

[0008] Preferably, the A-bags and B-bags are staggered and there are no gaps between them. With multiple A-bags and B-bags staggered, when the cutter cuts the A-bags and B-bags in sequence, the A-bags and B-bags inside can be fully and evenly mixed together, thereby accelerating the drying speed and quickly sealing the gap between the two lining parts.

[0009] Preferably, each of the cutter surfaces is fixedly equipped with extrusion blades, the shape of which is similar to that of plastic bag A and plastic bag B; when the slider drives the cutter to cut plastic bag A and plastic bag B, the extrusion blades on the cutter surface will extrude plastic bag A and plastic bag B, which can squeeze out all the A and B adhesives inside plastic bag A and plastic bag B, avoiding the residue of A and B adhesives inside plastic bag A and plastic bag B, which would affect the sealing performance.

[0010] Preferably, the lower surface of the second lining section has a groove, a cleaning block is slidably installed on the inner wall of the groove, a set of springs is fixedly installed on the surface of the cleaning block, the other end of the springs is fixedly connected to the inner wall of the groove, an installation plate is fixedly installed on the lower surface of the second lining section, a rotating shaft is rotatably installed on the inner wall of the installation plate, a winding frame is fixedly installed on the surface of the rotating shaft, a connecting rope is fixedly installed on the surface of the winding frame, the other end of the connecting rope is fixedly connected to the surface of the cleaning block, the cleaning block abuts against the surface of the flashing light, and a motor (intermittent) is fixedly installed on the surface of the installation plate. The motor (which operates by moving the motor) has its output shaft and rotating shaft fixedly connected. When the motor starts, it works with the rotating shaft to rotate the winding frame, which winds up the connecting rope. During the winding process, the cleaning block moves to clean the flashing light. When the cleaning block moves, it stretches the spring. When the motor runs for a specified time, it will shut off. At this time, the spring is released and the cleaning block resets. During the reset process, the cleaning block cleans the flashing light again. When the motor starts again, it will clean the flashing light again. This process is repeated to keep the surface of the flashing light clean and prevent dirt from affecting the warning effect of the flashing light.

[0011] Preferably, a set of corrugated pipes is fixedly installed on the lower surface of the second lining part, and a set of air holes are opened on the surface of the corrugated pipes. When the cleaning block moves, it will squeeze the corrugated pipes. After the corrugated pipes are squeezed, the air inside will be ejected along the air holes. Therefore, when the A glue and B glue in the A glue bag and the B glue bag mix and flow to the gap between the second lining part, the airflow will accelerate the drying of the A glue and B glue, accelerate the drying and bonding, thereby improving the efficiency of sealing the gap between the second lining part.

[0012] Preferably, each of the corrugated pipes has an extension strip fixedly installed on its surface, and each extension strip has a set of spray holes on its surface; when the corrugated pipe is compressed, some air will enter into the extension strip and be sprayed out through the spray holes, thereby increasing the range of air spraying for A glue and B glue, and further improving the efficiency of sealing the gap between the two parts of the lining.

[0013] Preferably, a set of mounting grooves is formed on the surface of the two lining parts, and a rotating rod is rotatably mounted on the inner wall of each mounting groove. A stirring blade is fixedly mounted on the surface of each rotating rod. As the A and B adhesives in the A and B bags flow into the gaps, they will come into contact with the stirring blades and cause them to rotate. The stirring blades can further mix the A and B adhesives, thereby improving the solidification effect of the A and B adhesives after drying and making them less likely to loosen between the two lining parts.

[0014] Preferably, the surface of the pressure switch is covered with a waterproof membrane, and one end of the waterproof membrane is fixedly connected to the inner wall of the mounting cavity. When water seepage occurs, the waterproof membrane can prevent water from entering the pressure switch and causing a short circuit without affecting the normal compression of the pressure switch, thereby improving the service life of the pressure switch.

[0015] A method for using a soft rock large deformation tunnel lining support structure, the method employing the aforementioned soft rock large deformation tunnel lining support structure, the method comprising the following steps:

[0016] S1: Lining section one and lining section two are supported in soft rock tunnel. When water seeps from the top of the tunnel and enters the tunnel through the gap between lining section two, the water comes into contact with the water-swellable strip, and the water-swellable strip immediately expands laterally in installation cavity one.

[0017] S2: When the water-expanding strip expands, it will contact the pressure switch and squeeze it. When the pressure switch is squeezed, the flashing light will be activated, and the flashing light will emit an alarm sound and flash to remind the staff that there is a leak.

[0018] S3: Water expansion strips pre-seal the space between the two lining sections to a certain extent, reducing water seepage.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The present invention discloses a soft rock large deformation tunnel lining support structure and its usage method, in which lining part one and lining part two are supported in a soft rock tunnel. When water seeps from the top of the tunnel and enters the tunnel through the gap between lining part two, the water comes into contact with the water-swellable strip. The water-swellable strip then expands laterally in the installation cavity one. After the water-swellable strip expands, it will contact the pressure switch and squeeze it. When the pressure switch is squeezed, the flashing light will be activated. The flashing light will emit an alarm sound and flash to remind the staff of the water leak, so that maintenance can be arranged quickly. In addition, the water-swellable strip can pre-seal the gap between lining part two to a certain extent, reduce the amount of water seepage, and thus prevent a large amount of water seepage from affecting the safety of the tunnel.

[0021] 2. The soft rock large deformation tunnel lining support structure and its usage method described in this invention, when the water-swellable strip expands, it will drive the slider that opposes it to move. The slider moves towards the pressure switch and drives the cutter to cut the A and B plastic bags. After the A and B plastic bags are cut open, the A and B plastics inside flow out of the second installation cavity and mix and dry between the two lining parts, sealing the seepage point between the two lining parts and preventing water from seeping into the tunnel. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a perspective view of the entire invention;

[0024] Figure 2 This is a schematic diagram of the structure of the two lining parts in this invention;

[0025] Figure 3 In this invention Figure 2 A schematic diagram of the structure at point A;

[0026] Figure 4 This is a schematic diagram of the cleaning block in this invention;

[0027] Figure 5 This is a partial cross-sectional view of the two lining sections in this invention;

[0028] Figure 6 This is a schematic diagram of the waterproof membrane structure in Example 2;

[0029] Figure 7 This is a flowchart of the method of the present invention.

[0030] In the diagram: 1. Lining Part 1; 2. Lining Part 2; 3. Installation Chamber 1; 4. Pressure Switch; 5. Water-swellable Strip; 6. Flashing Light; 7. Installation Chamber 2; 8. A-type Plastic Bag; 9. Slide Groove; 10. Sliding Block; 11. Cutting Blade; 12. Extrusion Blade; 13. Groove; 14. Cleaning Block; 15. Spring; 16. Mounting Plate; 17. Rotating Shaft; 18. Rewinding Frame; 19. Connecting Rope; 20. Corrugated Pipe; 21. Extension Strip; 22. Spray Nozzle; 23. Installation Groove; 24. Rotating Rod; 25. Mixing Blade; 26. Waterproof Membrane; 27. Motor; 28. Air Hole; 29. ​​B-type Plastic Bag. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Example 1:

[0033] like Figures 1 to 5As shown in the embodiment of the present invention, a soft rock large deformation tunnel lining support structure includes a set of lining part 1, on the surface of each lining part 1, lining part 2 is fixedly installed, and a set of installation cavities 3 are opened on the surface of each lining part 2. The installation cavities 3 are located in the gaps between adjacent lining parts 2. A set of pressure switches 4 are fixedly installed on the inner wall of the installation cavity 3. A flashing light 6 (which flashes continuously and emits an alarm sound) is fixedly installed on the lower surface of each lining part 2. A water-swellable strip 5 is fixedly installed on the inner wall of the installation cavity 3. Currently, after the soft rock large deformation tunnel is lined, because the lining structure is block lining, gaps will exist between the blocks. When water seeps into the tunnel from the soft rock, the seeping water will affect the stability of the tunnel environment and pose a safety hazard. To prevent large deformations in soft rock tunnels under the combined effects of high ground stress and rock mass expansion, lining section 1 and lining section 2 are installed within the soft rock tunnel. When water seeps from the tunnel roof and enters the tunnel through the gaps between lining section 2, the water comes into contact with the water-swellable strip 5. The water-swellable strip 5 then expands laterally within the installation cavity 3. After the water-swellable strip 5 expands, it comes into contact with the pressure switch 4 and is squeezed. When the pressure switch 4 is squeezed, the flashing light 6 is activated, emitting an alarm sound and flashing a light to alert staff of the leak, allowing for rapid maintenance. Furthermore, the water-swellable strip 5 can pre-seal the gaps between lining section 2 to a certain extent, reducing the amount of water seepage and preventing large amounts of water from affecting the safety of the tunnel.

[0034] The second lining section 2 has a set of installation cavities 7 on its surface. A set of A-type plastic bags 8 and a set of B-type plastic bags 29 are fixedly installed inside each of the installation cavities 7. The inner wall of the first installation cavity 3 has a set of sliding grooves 9, and sliders 10 are slidably installed on the inner walls of each groove 9. Cutters 11 are fixedly installed on the lower surface of each slider 10, located within the second installation cavity 7. The sliders 10 abut against the surface of the water-swellable strip 5. When the water-swellable strip 5 expands, it drives the sliders 10 to move. The sliders 10 move towards the pressure switch 4 and drive the cutters 11 to cut the A-type plastic bags 8 and B-type plastic bags 29. After the A-type plastic bags 8 and B-type plastic bags 29 are cut open, the A-type and B-type plastics inside flow out of the second installation cavity 7, mix, and dry between the second lining sections 2, sealing the seepage points between the second lining sections 2 and preventing water from seeping into the tunnel.

[0035] The A-bags 8 and B-bags 29 are staggered and there are no gaps between them. With multiple A-bags 8 and B-bags staggered, when the cutter 11 cuts open the A-bags 8 and B-bags 29 in sequence, the A-bags 8 and B-bags 29 can be fully and evenly mixed together, thereby accelerating the drying speed and quickly sealing the gaps between the two lining parts 2.

[0036] The surface of the cutter 11 is fixedly equipped with extrusion blades 12, the shape of which is similar to that of the A-bag 8 and the B-bag 29. When the slider 10 drives the cutter 11 to cut the A-bag 8 and the B-bag 29, the extrusion blades 12 on the surface of the cutter 11 will extrude the A-bag 8 and the B-bag 29, which can squeeze out all the A-bag and B-bag inside the A-bag 8 and the B-bag 29, thus avoiding the A-bag and B-bag remaining inside the A-bag 8 and the B-bag 29 and affecting the sealing performance.

[0037] The lower surface of the second lining section 2 is provided with a groove 13. A cleaning block 14 is slidably installed on the inner wall of the groove 13. A set of springs 15 is fixedly installed on the surface of the cleaning block 14. The other end of the springs 15 is fixedly connected to the inner wall of the groove 13. An installation plate 16 is fixedly installed on the lower surface of the second lining section 2. A rotating shaft 17 is rotatably installed on the inner wall of the installation plate 16. A winding frame 18 is fixedly installed on the surface of the rotating shaft 17. A connecting rope 19 is fixedly installed on the surface of the winding frame 18. The other end of the connecting rope 19 is fixedly connected to the surface of the cleaning block 14. The cleaning block 14 abuts against the surface of the flashing light 6. A motor 27 is fixedly installed on the surface of the installation plate 16. (Intermittent operation), the output shaft of the motor 27 is fixedly connected to the rotating shaft 17; when the motor 27 starts, it cooperates with the rotating shaft 17 to rotate the winding frame 18 to wind up the connecting rope 19. During the winding process of the connecting rope 19, the cleaning block 14 is driven to move to clean the flashing light 6. When the cleaning block 14 moves, it stretches the spring 15. When the motor 27 runs for a specified time, it will turn off. At this time, the spring 15 is unrestrained and drives the cleaning block 14 to reset. During the reset process, the cleaning block 14 cleans the flashing light 6 again. When the motor 27 starts again, it will clean the flashing light 6 again. This process is repeated to keep the surface of the flashing light 6 clean and prevent dirt from adhering to the surface and affecting the warning effect of the flashing light 6.

[0038] A set of corrugated pipes 20 are fixedly installed on the lower surface of the second lining section 2. A set of air holes 28 are opened on the surface of the corrugated pipes 20. When the cleaning block 14 moves, it will squeeze the corrugated pipes 20. After the corrugated pipes 20 are squeezed, the air inside will be sprayed out along the air holes 28. Therefore, when the A glue and B glue in the A glue bag 8 and B glue bag 29 mix and flow to the gap between the second lining section 2, the airflow will accelerate the drying of the A glue and B glue and accelerate the drying and bonding, thereby improving the efficiency of sealing the gap between the second lining section 2.

[0039] The bellows 20 is fixedly mounted with extension strips 21 on its surface, and each extension strip 21 has a set of spray holes 22 on its surface. When the bellows 20 is compressed, some air will enter the extension strips 21 and be sprayed out through the spray holes 22, thereby increasing the range of air spraying A glue and B glue, and further improving the efficiency of sealing the gap between the two lining parts 2.

[0040] The surface of the second lining section 2 is provided with a set of installation grooves 23. The inner wall of each installation groove 23 is rotatably mounted with a rotating rod 24. The surface of each rotating rod 24 is fixedly mounted with a stirring blade 25. As the A glue and B glue in the A glue bag 8 and B glue bag 29 flow into the gap, they will come into contact with the stirring blade 25 and cause it to rotate. The stirring blade 25 can further mix the A glue and B glue, thereby improving the solidification effect of the A glue and B glue after drying and making it less likely to loosen between the second lining sections 2.

[0041] Example 2:

[0042] like Figure 6 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the surface of the pressure switch 4 is covered with a waterproof membrane 26, one end of the waterproof membrane 26 is fixedly connected to the inner wall of the mounting cavity 3; when water seepage occurs, the waterproof membrane 26 can prevent water from entering the pressure switch 4 and causing a short circuit without affecting the normal compression of the pressure switch 4, thereby improving the service life of the pressure switch 4.

[0043] like Figure 7 As shown, a method for using a soft rock large deformation tunnel lining support structure is described above. The method includes the following steps:

[0044] S1: Lining part 1 and lining part 2 are supported in the soft rock tunnel. When water seeps from the top of the tunnel and enters the tunnel through the gap between lining part 2, the water comes into contact with the water-swellable strip 5, and the water-swellable strip 5 immediately expands laterally in the installation cavity 3.

[0045] S2: When the water-expanding strip 5 expands, it will contact the pressure switch 4 and squeeze it. When the pressure switch 4 is squeezed, the flashing light 6 will be turned on. The flashing light 6 will emit an alarm sound and flash a light to remind the staff that there is a water leak.

[0046] S3: Water expansion strip 5 pre-seals the space between the two lining sections 2 to a certain extent, reducing water seepage.

[0047] Working principle: Lining section 1 and lining section 2 are supported inside a soft rock tunnel. When water seeps from the tunnel ceiling and enters the tunnel through the gaps between lining section 2, the water comes into contact with the water-swellable strip 5. The water-swellable strip 5 then expands laterally within the installation cavity 3. After expansion, the water-swellable strip 5 contacts and compresses the pressure switch 4. When the pressure switch 4 is compressed, the flashing light 6 is activated, emitting an alarm sound and flashing a light to alert personnel to the leak, allowing for rapid maintenance. The water-swellable strip 5 also provides a certain degree of pre-sealing between lining section 2, reducing the amount of seepage and preventing large-scale seepage from affecting the tunnel's safety. When the water-swellable strip 5 expands, it drives the expansion of its components... The opposing slider 10 moves towards the pressure switch 4, driving the cutter 11 to cut the A-bag 8 and B-bag 29. After the A-bag 8 and B-bag 29 are cut open, the A and B adhesives inside flow out of the installation cavity 7, mix, and dry between the lining sections 2, sealing any water seepage and preventing water from entering the tunnel. Multiple A-bags 8 and B-bags are staggered; when the cutter 11 cuts the A-bags 8 and B-bags 29 sequentially, the A and B adhesives inside them mix thoroughly and evenly, accelerating the drying process and quickly sealing the gaps between the lining sections 2. The slider 10 drives the cutter 11 to cut the A-bags 8 and B-bags. At 29 o'clock, the extrusion blades 12 on the surface of the cutter 11 will extrude both A-bag 8 and B-bag 29, squeezing out all the A and B adhesives inside A-bag 8 and B-bag 29, preventing A and B adhesives from remaining inside A-bag 8 and B-bag 29 and affecting the sealing performance; when the motor 27 starts, it cooperates with the rotating shaft 17 to rotate the winding frame 18 to wind up the connecting rope 19. During the winding process of the connecting rope 19, it drives the cleaning block 14 to move and clean the flashing light 6. When the cleaning block 14 moves, it stretches the spring 15. When the motor 27 runs for a specified time, it will turn off. At this time, the spring 15 will be unrestrained and drive the cleaning block 14 to reset. During the reset process of the cleaning block 14, it will clean the flashing light 6 again. When the motor 27 starts again, it will clean the flashing light 6 again. The lamp 6 is cleaned repeatedly to keep its surface clean and prevent dirt from affecting its warning effect. During the movement of the cleaning block 14, the bellows 20 is compressed, causing air to be ejected through the vents 28. Therefore, when the A and B adhesives in the A and B bags 8 and 29 mix and flow to the gap between the two lining sections 2, the airflow accelerates their drying and bonding, thus improving the efficiency of sealing the gap. When the bellows 20 is compressed, some air enters the extension strip 21 and is ejected through the nozzle 22, increasing the range of airflow for the A and B adhesives and further improving the efficiency of sealing the gap between the two lining sections 2.As the A and B adhesives in the A bag 8 and B bag 29 flow into the gaps, they come into contact with and rotate the mixing blade 25. The mixing blade 25 further mixes the A and B adhesives, thereby improving their solidification effect after drying and preventing them from loosening between the two lining sections 2. When water seepage occurs, the waterproof membrane 26 can prevent water from entering the pressure switch 4 and causing a short circuit without affecting the normal compression of the pressure switch 4, thus extending the service life of the pressure switch 4.

[0048] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0049] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft rock large deformation tunnel lining support structure, characterized by: The application relates to a lining device, which comprises a lining one part (1), the surface of the lining one part (1) is fixedly provided with lining two parts (2), the surface of the lining two parts (2) is provided with a group of installation cavities one (3), the installation cavities one (3) are located at the gaps between adjacent lining two parts (2), the inner wall of the installation cavities one (3) is fixedly provided with a group of pressure switches (4), the lower surface of the lining two parts (2) is fixedly provided with a flashing light (6), the inner wall of the installation cavities one (3) is fixedly provided with water-swelling strips (5), the surface of the lining two parts (2) is provided with a group of installation cavities two (7), the inside of the installation cavities two (7) is fixedly provided with a group of A glue bags (8), the inside of the installation cavities two (7) is fixedly provided with a group of B glue bags (29), the inner wall of the installation cavities one (3) is provided with a group of sliding grooves (9), the inner wall of the sliding grooves (9) is slidably provided with sliding blocks (10), the lower surface of the sliding blocks (10) is fixedly provided with cutting knives (11), the cutting knives (11) are located in the installation cavities two (7), and the sliding blocks (10) abut against the surface of the water-swelling strips (5). The A glue bags (8) and the B glue bags (29) are staggered, and no gap exists between the A glue bags (8) and the B glue bags (29). When the water-swelling strips (5) swell, the sliding blocks (10) abutting against the water-swelling strips (5) move, the sliding blocks (10) move towards the pressure switches (4) and drive the cutting knives (11) to cut the A glue bags (8) and the B glue bags (29). The surface of the cutting knives (11) is fixedly provided with extrusion blades (12), the shapes of the extrusion blades (12) are similar to those of the A glue bags (8) and the B glue bags (29).

2. A soft rock large deformation tunnel lining support structure according to claim 1, characterized in that: The lower surface of the lining two parts (2) is provided with a groove (13), the inner wall of the groove (13) is slidably provided with a cleaning block (14), the ground surface of the cleaning block (14) is fixedly provided with a group of springs (15), the other end of the springs (15) is fixedly connected with the inner wall of the groove (13), the lower surface of the lining two parts (2) is fixedly provided with a mounting plate (16), the inner wall of the mounting plate (16) is rotatably provided with a rotating shaft (17), the surface of the rotating shaft (17) is fixedly provided with a winding frame (18), the surface of the winding frame (18) is fixedly provided with a connecting rope (19), the other end of the connecting rope (19) is fixedly connected with the ground surface of the cleaning block (14), the cleaning block (14) abuts against the surface of the flashing light (6), the surface of the mounting plate (16) is fixedly provided with a motor (27), and the output shaft of the motor (27) is fixedly connected with the rotating shaft (17).

3. A soft rock large deformation tunnel lining support structure according to claim 2, characterized in that: The surface of the lining two parts (2) is provided with a group of installation grooves (23), the inner wall of the installation grooves (23) is rotatably provided with rotating rods (24), and the surface of the rotating rods (24) is fixedly provided with stirring blades (25).

4. A soft rock large deformation tunnel lining support structure according to claim 3, characterized in that: The surface of the pressure switches (4) is sleeved with waterproof membranes (26), and one end of the waterproof membranes (26) is fixedly connected with the inner wall of the installation cavities one (3).

5. A soft rock large deformation tunnel lining support structure according to claim 4, characterized in that: The method comprises the following steps:

6. A method of using a soft rock large deformation tunnel lining support structure, the method employing a soft rock large deformation tunnel lining support structure as claimed in any one of claims 1 to 5, characterised by: ​ S1: The first lining part (1) and the second lining part (2) are supported in the soft rock tunnel, when the water seeps from the top of the tunnel and enters the tunnel along the gap between the second lining part (2), the water contacts the water-swelling strip (5), and the water-swelling strip (5) expands transversely in the installation cavity I (3) immediately; S2: When the water-swelling strip (5) expands, it will contact and press the pressure switch (4), when the pressure switch (4) is pressed, the flashing light (6) will be turned on, the flashing light (6) will emit an alarm sound and flash, reminding the staff that there is water leakage here; S3: The water-swelling strip pre-seals the gap between the second lining part (2) to a certain extent, reducing the amount of water seepage.

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