Construction drainage method and device suitable for super-long deep-buried tunnel

Abstract

The present application relates to construction drainage technology, used for solving the problem that a large amount of water on the ground in the tunnel causes poor working environment for workers and is prone to electrical equipment failure or electric leakage, in particular to a construction drainage method and device for super-long deep-buried tunnels; in the present application, a hole is drilled below the excavation face, at this time if there is water flow behind the excavation face, the water flow will contact the outer sleeve through the gap and flow into through the water guide hole on the outer sleeve, thereby realizing detection of the moisture behind the excavation face before excavation, and if there is water behind the excavation face, the water can also be discharged in time, avoiding the problem that after excavation, water flow flows into the tunnel to pollute the environment in the tunnel, the water outlet pipe is connected with the inner sleeve and the slope drainage pipe, so that the water flowing in the slope drainage pipe can also flow into the water outlet pipe, preventing the problem of dampness in the tunnel or water storage on the bottom surface caused by dripping of the slope drainage pipe, further ensuring dryness in the tunnel and improving electrical safety.

Description

Technical Field

[0001] This invention relates to construction drainage technology, specifically to a construction drainage method and apparatus suitable for extra-long, deep-buried tunnels. Background Technology

[0002] Tunnels are engineering structures buried underground, representing a form of human utilization of underground space. Tunnels can be categorized into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. In mountain rock masses, there are often fractured zones composed of non-single cracks of a certain width and considerable length, causing the rock mass to lose its continuity and integrity. Water is often present within these fault fracture zones encountered during tunnel construction. To ensure the normal and safe operation of the tunnel, the water in the fracture zones must be drained during construction. Timely drainage of water ensures the safety of tunnel construction.

[0003] Currently, the existing construction drainage methods are basically to pump out the water flowing into the tunnel. However, this method can only be used for passive drainage after water enters the tunnel. A large amount of water in the tunnel will make the construction environment dirty and messy. In addition, the large number of temporary wires and electrical equipment during construction will make tunnel construction more dangerous. At the same time, the dirty and messy environment will make construction more difficult for workers and will not be conducive to construction.

[0004] To address the aforementioned technical problems, this application proposes a solution. Summary of the Invention

[0005] In this invention, by drilling holes below the excavation face and then using oil seals and rock-breaking cones above and below the outer casing to statically fracture the rock, fissures appear in the rock behind the excavation face. If water is present behind the excavation face, it will flow through the fissures and into the outer casing, and then into the tunnel through the water guide holes on the outer casing. This allows for the detection of moisture behind the excavation face before excavation and timely drainage of any water present, preventing water from flowing into the tunnel and polluting the tunnel environment after excavation. In addition to connecting to the inner casing, the outlet pipe also connects to the slope drainage pipe, allowing water flowing from the slope drainage pipe to flow into the outlet pipe. This prevents the tunnel from becoming damp or accumulating water on the bottom surface due to dripping from the slope drainage pipe, further ensuring the dryness of the tunnel, improving electrical safety, and solving the problem of poor working conditions and potential electrical equipment failures or leakage caused by a large amount of water on the bottom surface of the tunnel. Therefore, this invention proposes a construction drainage method and device suitable for extra-long, deep-buried tunnels.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A construction drainage method applicable to extra-long, deep-buried tunnels, comprising the following steps:

[0008] Step 1: Drill holes at the lower left and lower right corners of the excavation face. The hole diameter should be slightly larger than the diameter of the outer sleeve of the construction drainage device suitable for extra-long and deep buried tunnels. Place a set of construction drainage devices suitable for extra-long and deep buried tunnels at the lower left and lower right corners of the excavation face. Insert the sleeve head at the front end of the outer sleeve into the holes at the lower left and lower right corners of the excavation face, and then connect the motor to the motor connection port.

[0009] Step 2: Start the motor. The motor drives the motor connector to rotate, which in turn drives the drive gear to rotate. The drive gear drives the transmission rack that meshes with it to move forward, and the transmission rack drives the outer sleeve to move forward, so that the outer sleeve is fully inserted into the holes at the lower left and lower right corners of the excavation face.

[0010] Step 3: Connect the hydraulic oil pipe to the oil injection pipe. Use an external hydraulic pump to inject hydraulic oil into the gap between the inside of the oil seal sleeve and the outer sleeve and inner sleeve. The hydraulic oil pushes the bottom of the oil seal plug, causing the oil seal plug to rise. The rock-breaking cone squeezes the inner wall of the rock, causing the rock to be squeezed out of the crack. If there is water flow behind the excavation face, the water will flow out along the crack and enter the inside of the inner sleeve through the water guide hole on the outer wall of the outer sleeve. It will then flow into the water outlet pipe and be discharged through the water outlet pipe.

[0011] Step 4: By opening drainage holes with a lower outer slope and a higher inner slope on the tunnel sidewall, inserting slope drainage pipes into the drainage holes, and connecting the outlet end of the slope drainage pipes to the diversion pipes, the bottom end of the diversion pipes flows into the outlet pipe, so that the water inside the tunnel sidewall is guided into the outlet pipe along the slope drainage pipes. The outlet end of the outlet pipe is connected to a temporary water storage pit or river.

[0012] A construction drainage device suitable for extra-long, deep-buried tunnels includes an outer sleeve, inside which an inner sleeve is fitted, with a gap between the outer and inner sleeves. The outer wall of the outer sleeve has a water guide hole and a hydraulic outlet. An oil seal plug is slidably connected inside the hydraulic outlet, and the oil seal plug and hydraulic outlet are connected with a slight interference fit. The water guide hole passes through a circular tube through the gap between the outer and inner sleeves, directly into the inner sleeve. A rock-breaking cone is fixedly installed on the top of the oil seal plug. A sleeve head with a conical structure is fixedly installed on the front end of the outer sleeve. The outer sleeve is fixedly mounted on both horizontal sides. The device has a transmission rack. An oil seal sleeve is fixedly installed on the outer wall of the inner sleeve at the end away from the sleeve head. The oil seal sleeve has an annular opening at the end facing the sleeve head, which communicates with the gap formed by the outer sleeve and the inner sleeve. An oil injection pipe is provided on the side of the oil seal sleeve away from the outer sleeve, and the oil injection pipe is connected to the inside of the oil seal sleeve. A water outlet pipe is fixedly connected to the end of the inner sleeve away from the sleeve head. Multiple diversion pipes are fixedly installed obliquely above the water outlet pipe. The diversion pipes are divided into inclined sections and vertical sections. Multiple openings are provided on the vertical ends of the diversion pipes, and slope drainage pipes are connected to these openings.

[0013] In a preferred embodiment of the present invention, a bracket is slidably connected below the outer sleeve, the bracket is placed on the ground, motor connection ports are fixedly installed on both sides of the bracket, and a drive gear is rotatably connected above the motor connection port, the drive gear meshing with the transmission rack.

[0014] In a preferred embodiment of the present invention, a limiting rod is rotatably connected to the lower surface of the oil seal plug, a sliding groove is provided on the outer wall of the inner sleeve, the position of the sliding groove corresponds to the oil seal plug, T-shaped grooves are provided on both sides of the sliding groove, a slider is slidably connected inside the sliding groove, the two sides of the slider are engaged in the T-shaped groove by T-shaped locking blocks, and the upper surface of the slider is rotatably connected to the bottom end of the limiting rod.

[0015] In a preferred embodiment of the present invention, a water outlet grid is fixedly installed inside the inner sleeve, and a check ball is placed inside the water outlet grid. The diameter of the check ball is larger than the diameter of the water outlet grid. Each set of water outlet grids is located below the water guide hole. The size of the check ball is larger than the inner diameter of the water guide hole, and the check ball can completely block the bottom of the water guide hole.

[0016] In a preferred embodiment of the present invention, the transmission rack is fixedly installed on both sides of the outer sleeve, and the water guide hole and oil seal plug are distributed at the top and bottom of the outer sleeve, with the water guide hole and oil seal plug being alternately arranged.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, by drilling a hole below the excavation face, and then using oil seal plugs and rock-breaking cones above and below the outer sleeve to statically fracture the rock, cracks appear in the rock behind the excavation face. If there is water flow behind the excavation face, the water will come into contact with the outer sleeve through the cracks and flow in through the water guide holes on the outer sleeve. This allows for the detection of water behind the excavation face before excavation. At the same time, if there is water behind the excavation face, it can be drained in time, preventing water from flowing into the tunnel and polluting the tunnel environment after excavation.

[0019] 2. In this invention, in addition to being connected to the inner sleeve, the outlet pipe is also in contact with the slope drainage pipe, so that the water flowing out of the slope drainage pipe can also flow into the outlet pipe, preventing the problem of dampness in the tunnel or water accumulation on the bottom surface caused by dripping water from the slope drainage pipe, further ensuring the dryness of the tunnel and improving electrical safety. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the shunt tube structure of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the tunnel cross-section of the present invention;

[0026] Figure 6 This is a schematic diagram of the tunnel side section of the present invention;

[0027] Figure 7 This is a schematic diagram of the water outlet grille structure of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged diagram of point B in the middle.

[0029] In the diagram: 1. Outer sleeve; 2. Sleeve head; 3. Outlet pipe; 4. Diverter pipe; 5. Slope drainage pipe; 6. Oil seal sleeve; 7. Oil injection pipe; 8. Drive gear; 9. Transmission rack; 10. Oil seal plug; 11. Water guide hole; 12. Rock breaking cone; 13. Limiting rod; 14. Slide groove; 15. Sliding block; 16. Inner sleeve; 17. Outlet grid; 18. Check ball; 19. Support; 20. Motor connection port. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] Please see Figure 5 - Figure 6 As shown, a construction drainage method applicable to extra-long, deep-buried tunnels is described. The construction drainage method for extra-long, deep-buried tunnels includes the following steps:

[0033] Step 1: Drill holes at the lower left and lower right corners of the excavation face. The hole diameter is slightly larger than the diameter of the outer sleeve 1 in the construction drainage device suitable for extra-long deep buried tunnels. This facilitates the entry of the outer sleeve 1 and also prevents water from flowing out from the gap between the hole and the outer sleeve 1 due to the excessively large hole diameter. After the drainage is used, the hole can also be used as a charging hole for tunnel blasting, saving time. Place a set of construction drainage devices suitable for extra-long deep buried tunnels at the lower left and lower right corners of the excavation face. The device is placed on the ground by the bracket 19. Insert the sleeve head 2 at the front end of the outer sleeve 1 into the hole at the lower left and lower right corners of the excavation face, and then connect the motor to the motor connection port 20.

[0034] Step 2: Start the motor. The motor drives the motor connection port 20 to rotate. The motor connection port 20 drives the drive gear 8 to rotate. The drive gear 8 drives the transmission rack 9 that meshes with it to move forward. The transmission rack 9 drives the outer sleeve 1 to move forward, so that the outer sleeve 1 is fully inserted into the holes at the lower left and lower right corners of the excavation face. The conical sleeve head 2 at the front of the outer sleeve 1 makes it easier for the outer sleeve 1 to squeeze out scattered stones and other debris.

[0035] Step 3: Connect the hydraulic oil pipe to the oil injection pipe 7, start the hydraulic pump, and inject hydraulic oil into the gap between the oil seal sleeve 6 and the outer sleeve 1 and inner sleeve 16 through the external hydraulic pump. The hydraulic oil pushes the bottom of the oil seal plug 10, causing the oil seal plug 10 to rise. The rock breaking cone 12 squeezes the inner wall of the rock. The rock breaking cone 12 is made of multiple trapezoids. The pressure is increased by the small contact area at the top, making the rock easier to break. After the rock is squeezed out of the crack, if there is water flow behind the excavation face, the water will flow out along the crack and enter the inner sleeve 16 through the water guide hole 11 on the outer wall of the outer sleeve 1. It will then flow into the water outlet pipe 3 through the inner sleeve 16 and be discharged through the water outlet pipe 3. If no water flows in, the outer sleeve 1 can be directly withdrawn.

[0036] Step 4: By opening drainage holes with a lower outer slope and a higher inner slope on the tunnel sidewall, the drainage holes are more conducive to the drainage of water inside the wall. The slope drainage pipe 5 is made of porous plastic pipe, which facilitates the water inside the wall to converge at the pipe wall. The slope drainage pipe 5 is inserted into the drainage hole, and the outlet end of the slope drainage pipe 5 is connected to the diversion pipe 4. The bottom end of the diversion pipe 4 flows into the water outlet pipe 3, so that the water inside the tunnel sidewall is guided into the water outlet pipe 3 along the slope drainage pipe 5. This prevents the water from the slope drainage pipe 5 from dripping directly into the tunnel surface and causing water accumulation on the tunnel surface, thus improving the working environment inside the tunnel and improving the safety of electrical construction inside the tunnel. The outlet end of the water outlet pipe 3 is connected to a temporary water storage pit or river channel for easy water drainage or collection.

[0037] Example 2:

[0038] Please see Figure 1 - Figure 8As shown, a construction drainage device suitable for extra-long, deep-buried tunnels includes an outer sleeve 1, inside which an inner sleeve 16 is fitted. A gap is left between the outer sleeve 1 and the inner sleeve 16 for hydraulic oil to flow in. A water guide hole 11 and a hydraulic outlet are provided on the outer wall of the outer sleeve 1. An oil seal plug 10 is slidably connected inside the hydraulic outlet. The oil seal plug 10 and the hydraulic outlet are connected with a slight interference fit to improve the tightness of the connection between the oil seal plug 10 and the hydraulic outlet. The water guide hole 11 passes through the gap between the outer sleeve 1 and the inner sleeve 16 via a round pipe and directly enters the interior of the inner sleeve 16. A water outlet grid 17 is fixedly installed inside the inner sleeve 16. A check ball 18 is placed inside the water outlet grid 17. The diameter of the check ball 18 is larger than the diameter of the water outlet grid 17. Each set of water outlet grids 17 is positioned... Below the water guide hole 11, the anti-reverse ball 18 is larger than the inner diameter of the water guide hole 11. The anti-reverse ball 18 can completely block the bottom of the water guide hole 11, so that when the water flows in from the outside of the water guide hole 11, the anti-reverse ball 18 is washed out of the bottom of the water grid 17, and the water can flow out from the side wall of the water grid 17. When the water flows in the opposite direction, the water flows to wash the anti-reverse ball 18 until it contacts the bottom of the water guide hole 11, blocking the bottom of the water guide hole 11, thereby preventing backflow and preventing water from flowing out of the inner sleeve 16, realizing unidirectional water flow. The top of the oil seal plug 10 is fixedly installed with a rock-breaking cone 12. The rock-breaking cone 12 reduces the stress area of ​​the rock, making the rock easier to break under pressure. The lower surface of the oil seal plug 10 is rotatably connected to a limit rod 13, and the outer wall of the inner sleeve 16 is provided with The slide groove 14 corresponds to the oil seal plug 10. T-shaped grooves are formed on both sides of the slide groove 14. A slider 15 is slidably connected inside the slide groove 14, allowing it to slide within the groove. The slider 15 is engaged in the T-shaped grooves on both sides by T-shaped locking blocks, ensuring it does not fall out of the slide groove 14. The upper surface of the slider 15 is rotatably connected to the bottom end of the limiting rod 13. When the oil seal plug 10 is pushed outwards, it pulls the limiting rod 13, causing it to turn vertical. When the limiting rod 13 turns vertical, it drives the slider 15 to slide. When the limiting rod 13 is fully vertical, it pulls the slider 15 upwards, while the slider 15 is blocked by the T-shaped grooves on both sides of the slide groove 14. The rise of slider 15 is restricted, thereby restricting the rise of oil seal plug 10. When there is a cavity in the hole where outer sleeve 1 is located, and the cavity is located above oil seal plug 10, it prevents oil seal plug 10 from being squeezed out or even falling off by the action of hydraulic oil. A sleeve head 2 is fixedly installed at the front end of outer sleeve 1. The sleeve head 2 has a conical structure to facilitate the removal of gravel and other debris in the hole. Transmission racks 9 are fixedly installed on both horizontal sides of outer sleeve 1. An oil seal sleeve 6 is fixedly installed on the outer wall of the end of inner sleeve 16 away from sleeve head 2. An annular opening is opened on the end of oil seal sleeve 6 facing sleeve head 2. This opening is connected to the gap formed by outer sleeve 1 and inner sleeve 16, allowing hydraulic oil inside oil seal sleeve 6 to flow into the gap between outer sleeve 1 and inner sleeve 16.An oil injection pipe 7 is provided on the side of the oil seal sleeve 6 away from the outer sleeve 1. The oil injection pipe 7 is connected to the inside of the oil seal sleeve 6, and hydraulic oil is injected into the inside of the oil seal sleeve 6 through the oil injection pipe 7. A water outlet pipe 3 is fixedly connected to the end of the inner sleeve 16 away from the sleeve head 2, and the water inside the inner sleeve 16 is discharged through the water outlet pipe 3. Multiple diversion pipes 4 are fixedly installed diagonally above the water outlet pipe 3. The diversion pipe 4 is divided into an inclined section and a vertical end. The inclined section is used to connect to the water outlet pipe 3, and the vertical end is used to install multiple sets of slope drainage pipes 5. Multiple openings are opened on the vertical end of the diversion pipe 4, and the slope drainage pipes 5 are connected to the openings. The water inside the wall is discharged through the perforated slope drainage pipes 5 to prevent water seepage in the wall. A bracket 19 is slidably connected below the outer sleeve 1, and is placed on the ground to support the outer sleeve 1. Motor connection ports 20 are fixedly installed on both sides of the bracket 19. A drive gear 8 is rotatably connected above the motor connection ports 20, and the drive gear 8 meshes with a transmission rack 9. The motor drives the drive gear 8 to rotate, which in turn moves the transmission rack 9, causing the outer sleeve 1 to move, thus enabling the insertion or removal of the outer sleeve 1. The transmission rack 9 is fixedly installed on both horizontal sides of the outer sleeve 1. Water guide holes 11 and oil seal plugs 10 are distributed at the top and bottom of the outer sleeve 1, and are alternately arranged to improve the overlap between the rock fissures and the water guide holes 11.

[0039] Combining Embodiment 1 and Embodiment 2, the working principle is as follows:

[0040] Drill holes at the lower left and lower right corners of the excavation face. Place a set of drainage devices suitable for extra-long, deep-buried tunnels at each of the lower left and lower right corners of the excavation face. Insert the sleeve head 2 at the front end of the outer sleeve 1 into the holes at the lower left and lower right corners of the excavation face. The motor drives the transmission rack 9 forward through the drive gear 8, and the transmission rack 9 drives the outer sleeve 1 forward, so that the outer sleeve 1 is fully inserted into the holes at the lower left and lower right corners of the excavation face. Start the hydraulic pump, and the hydraulic oil pushes the bottom of the oil seal plug 10, causing the oil seal plug 10 to rise. Through the rock-breaking cone 12, the rock is squeezed against the inner wall, and the rock is... After the crack is squeezed out, if there is water flow behind the excavation face, the water will flow out along the squeezed crack, enter the inner sleeve 16 through the water guide hole 11 on the outer wall of the outer sleeve 1, and flow into the outlet pipe 3 along the inner sleeve 16. The water will be discharged through the outlet pipe 3. If there is no water flow, the outer sleeve 1 can be directly removed. By opening drainage holes with a lower outer surface and a higher inner surface on the tunnel sidewall, the water flow inside the tunnel sidewall is guided into the outlet pipe 3 along the slope drainage pipe 5, which prevents the water flow from the slope drainage pipe 5 from dripping directly into the tunnel surface and causing water accumulation on the tunnel surface, thus improving the working environment inside the tunnel.

[0041] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A construction drainage method applicable to extra-long, deeply buried tunnels, characterized in that, The device includes a construction drainage system suitable for extra-long, deep-buried tunnels: It includes an outer sleeve (1), inside which an inner sleeve (16) is fitted, with a gap between the outer sleeve (1) and the inner sleeve (16). The outer wall of the outer sleeve (1) has a water guide hole (11) and a hydraulic outlet. An oil seal plug (10) is slidably connected inside the hydraulic outlet. The oil seal plug (10) and the hydraulic outlet are connected with a slight interference fit. The water guide hole (11) passes through a round tube through the gap between the outer sleeve (1) and the inner sleeve (16) and directly enters the inner sleeve (16). A rock-breaking cone (12) is fixedly installed on the top of the oil seal plug (10). A sleeve head (2) is fixedly installed at the front end of the outer sleeve (1). The sleeve head (2) has a conical structure. The outer sleeve (1) is fixedly installed on both horizontal sides. Equipped with a transmission rack (9), an oil seal sleeve (6) is fixedly installed on the outer wall of the inner sleeve (16) away from the sleeve head (2). The oil seal sleeve (6) has an annular opening at the end facing the sleeve head (2), which is connected to the gap formed by the outer sleeve (1) and the inner sleeve (16). An oil injection pipe (7) is opened on the side of the oil seal sleeve (6) away from the outer sleeve (1), and the oil injection pipe (7) is connected to the inside of the oil seal sleeve (6). A water outlet pipe (3) is fixedly connected to the end of the inner sleeve (16) away from the sleeve head (2). Multiple diversion pipes (4) are fixedly installed obliquely above the water outlet pipe (3). The diversion pipe (4) is divided into an inclined section and a vertical section. Multiple openings are opened on the vertical end of the diversion pipe (4), and a slope drainage pipe (5) is connected in the opening. A bracket (19) is slidably connected below the outer tube (1). The bracket (19) is placed on the ground. Motor connection ports (20) are fixedly installed on both sides of the bracket (19). A drive gear (8) is rotatably connected above the motor connection port (20). The drive gear (8) meshes with the transmission rack (9). The construction drainage method for extra-long, deep-buried tunnels also includes the following steps: Step 1: Drill holes at the lower left and lower right corners of the excavation face. The hole diameter is slightly larger than the diameter of the outer sleeve (1) of the construction drainage device suitable for extra-long deep buried tunnels. Place a set of construction drainage devices suitable for extra-long deep buried tunnels at the lower left and lower right corners of the excavation face. Insert the sleeve head (2) at the front end of the outer sleeve (1) into the holes at the lower left and lower right corners of the excavation face. Then connect the motor to the motor connection port (20). Step 2: Start the motor. The motor drives the motor connector (20) to rotate. The motor connector (20) drives the drive gear (8) to rotate. The drive gear (8) drives the transmission rack (9) that meshes with it to move forward. The transmission rack (9) drives the outer sleeve (1) to move forward, so that the outer sleeve (1) is fully inserted into the holes at the lower left and lower right corners of the excavation face. Step 3: Connect the hydraulic oil pipe to the oil injection pipe (7), and inject hydraulic oil into the gap between the inside of the oil seal sleeve (6) and the outer sleeve (1) and the inner sleeve (16) through the external hydraulic pump. The hydraulic oil pushes the bottom of the oil seal plug (10), causing the oil seal plug (10) to rise. The rock breaking cone (12) squeezes the inner wall of the rock, causing the rock to be squeezed out of the crack. If there is water flow behind the excavation face, the water will flow out along the crack and enter the inner sleeve (16) through the water guide hole (11) on the outer wall of the outer sleeve (1), and flow into the water outlet pipe (3) along the inner sleeve (16). The water is then discharged through the water outlet pipe (3). Step 4: By opening drainage holes with a lower outer side and a higher inner side on the tunnel sidewall, inserting a slope drainage pipe (5) into the drainage hole, and connecting the outlet end of the slope drainage pipe (5) to the diversion pipe (4), the bottom end of the diversion pipe (4) flows into the water outlet pipe (3), so that the water inside the tunnel sidewall is introduced into the water outlet pipe (3) along the slope drainage pipe (5), and the outlet end of the water outlet pipe (3) is connected to a temporary water storage pit or river.

2. The construction drainage method applicable to extra-long, deep-buried tunnels according to claim 1, characterized in that, The lower surface of the oil seal plug (10) is rotatably connected to a limiting rod (13). The outer wall of the inner sleeve (16) is provided with a sliding groove (14). The position of the sliding groove (14) corresponds to that of the oil seal plug (10). T-shaped grooves are provided on both sides of the sliding groove (14). A slider (15) is slidably connected inside the sliding groove (14). The two sides of the slider (15) are engaged in the T-shaped groove by T-shaped locking blocks. The upper surface of the slider (15) is rotatably connected to the bottom end of the limiting rod (13).

3. The construction drainage method applicable to extra-long, deep-buried tunnels according to claim 1, characterized in that, The inner sleeve (16) is fixedly installed with a water outlet grille (17), and a check ball (18) is placed inside the water outlet grille (17). The diameter of the check ball (18) is larger than the diameter of the water outlet grille (17). Each set of water outlet grilles (17) is located below the water guide hole (11). The size of the check ball (18) is larger than the inner diameter of the water guide hole (11). The check ball (18) can completely block the bottom of the water guide hole (11).

4. The construction drainage method applicable to extra-long, deep-buried tunnels according to claim 1, characterized in that, The transmission rack (9) is fixedly installed on both sides of the outer tube (1) at horizontal. The water guide hole (11) and the oil seal plug (10) are distributed at the top and bottom of the outer tube (1) and are alternately arranged.

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