A tunnel waterproof drainage system

Abstract

The present invention provides a tunnel waterproofing and drainage system, comprising a tunnel body having a tunnel, a roadway disposed at the bottom of the tunnel, and a sidewalk. The tunnel body comprises a primary lining and a secondary lining. The primary lining has longitudinal grooves formed on its inner wall, and adjacent longitudinal drainage pipes are embedded in the longitudinal grooves, connected by tees. The longitudinal drainage pipes are connected to outlet pipes that penetrate the secondary lining. The primary lining has transverse annular grooves formed at intervals along the tunnel body, and the transverse annular grooves are embedded in the transverse drainage pipes, connected to the longitudinal drainage pipes by tees. The sidewalk comprises cast-in-place concrete and a water reservoir. The sidewall of the water reservoir, adjacent to the outlet pipe, has a side water inlet hole formed on it. By adding a water reservoir capable of storing water within the sidewalk, the tunnel waterproofing and drainage system provides a backup water source for firefighting within the tunnel, thereby further ensuring the safety of people within the tunnel and, to a certain extent, avoiding significant economic losses.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a tunnel waterproofing and drainage system. Background Art

[0002] Tunnels are structures constructed by humans using underground or mountainous spaces. They can be broadly categorized as transportation tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. Waterproofing and drainage structures account for a significant portion of tunnel construction. The effectiveness of tunnel waterproofing and drainage directly impacts the drainage effectiveness of the tunnel lining. Furthermore, the quality of tunnel waterproofing and drainage structures significantly impacts the thickness of the concrete lining, ultimately impacting the service life of the lining.

[0003] According to geological lithology, soft rock refers to loose, broken, weak, and weathered expansive rock masses with a uniaxial compressive strength of less than 25 MPa. This type of rock, primarily mudstone, shale, siltstone, and argillaceous claystone, are relatively low-strength rocks and are naturally complex geological media. After tunnel excavation, due to the weak surrounding rock's low strength and poor self-stability, stress redistributes within the weak surrounding rock, creating a large loose zone around the tunnel. The construction of tunnels in soft surrounding rock is significantly affected by geological conditions and is further complicated by large cross-sections, shallow burial depths, and crossing existing roads or buildings. During construction, some existing tunnel projects have discovered small surface ditches and F3 fault zones nearby. Using existing tunnel construction methods directly against this geological condition, surface water can seep into the tunnel along the faults, creating a shower-like outflow during tunnel excavation. This can lead to severe water seepage within the tunnel, compromising construction quality.

[0004] With the continuous development of tunnel construction, the number of tunnels is increasing, and with it, the incidence of fires within tunnels is also increasing. Tunnel fires pose the following dangers: First, once a fire occurs in a long or extra-long highway tunnel, if it is not discovered and extinguished in a timely manner, the fire will spread rapidly along the tunnel's longitudinal direction, causing suffocation, burns, poisoning, or even death to drivers, passengers, and workers within the tunnel. Tunnel fires often result in a large number of casualties. Second, tunnel fires can also cause severe damage to tunnel facilities and structures, severely damaging or burning vehicles and their cargo, disrupting road service for a short period of several hours, tens of hours, or even longer, resulting in incalculable economic losses.

[0005] The existing Chinese patent application, CN110344879A, discloses a tunnel waterproofing and drainage system, comprising primary support, secondary lining, a waterproof layer, transverse drain pipes, longitudinal drain pipes, side ditches, transverse drain pipe A, transverse drain pipe B, and a central drain ditch. The waterproof layer is disposed between the primary support and the secondary lining, and the transverse drain pipes are evenly spaced between the primary support and the waterproof layer. The longitudinal drain pipes are connected to the transverse drain pipes, which are connected to the side ditches via transverse drain pipe A. The side ditches and the central drain ditch are connected via transverse drain pipe B and the sub-drain ditch. During operation, water seeping from the tunnel periphery enters the transverse drain pipes, then flows sequentially through the longitudinal drain pipes, transverse drain pipe A, side ditches, transverse drain pipe B, sub-drain ditch, and central drain ditch. The side ditches and central drain ditch then drain the inflowing water.

[0006] The above-mentioned existing technical solutions have the following defects: although the tunnel waterproof drainage system has a drainage function, when a fire occurs in the tunnel, it is difficult for the above-mentioned tunnel to extinguish the fire in time. Therefore, the existing tunnels usually add a fire protection system with a fire water pipeline to extinguish the fire. However, when the fire water pipeline in the fire protection system fails or the water supply is cut off, the tunnel lacks a backup fire water source to extinguish the fire, which can easily cause a large number of casualties and huge economic losses. Summary of the Invention

[0007] The problem to be solved by the present invention is to provide a tunnel waterproof drainage system in view of the above-mentioned deficiencies existing in the prior art, which solves the problem that existing tunnels in the prior art lack a backup fire water source.

[0008] The above-mentioned inventive object of the present invention is achieved through the following technical solutions: a tunnel waterproof drainage system, comprising a tunnel body with a tunnel, a carriageway arranged at the bottom of the tunnel and sidewalks located on both sides of the carriageway, the tunnel body comprising a primary lining and a secondary lining located inside the primary lining, the inner wall of the primary lining is provided with a longitudinal groove along the longitudinal direction of the tunnel body, the longitudinal grooves are embedded with longitudinal drainage pipes connected to adjacent ones by a tee pipe, the longitudinal drainage pipes are connected with an outlet pipe running through the secondary lining, the inner wall of the primary lining is provided with transverse annular grooves spaced circumferentially along the tunnel body, the transverse annular grooves are embedded with transverse drainage pipes connected to the longitudinal drainage pipe through a tee pipe, the sidewalk comprises cast-in-place concrete and water reservoirs spaced longitudinally along the tunnel body, the side wall of the water reservoir close to the outlet pipe is provided with a side water inlet hole connected to the outlet pipe.

[0009] The present invention is further configured as follows: the transverse drainage pipe is a perforated corrugated pipe, and the transverse drainage pipe is wrapped with geotextile.

[0010] The present invention is further configured as follows: the water reservoir includes a pool body embedded in cast-in-place concrete, the top surface of the pool body is provided with a sedimentation chamber and a water reservoir distributed in sequence away from the water outlet pipe, the side water inlet is connected to the sedimentation chamber, the top surface of the pool body is provided with a water filter hole connecting the sedimentation chamber and the water storage chamber, and a water filter rack is provided in the water filter hole.

[0011] The present invention is further configured as follows: the water filter frame includes a hollow frame arranged in the water filter hole, a stainless steel filter screen arranged in the hollow part of the hollow frame, and a mounting plate arranged on the side wall of the hollow frame and connected to the inner wall of the water reservoir.

[0012] The present invention is further configured as follows: drain holes are provided on the bottom walls of the sedimentation chamber and the water storage chamber, and a control mechanism for controlling the opening and closing of the drain hole is provided in each drain hole.

[0013] The present invention is further configured as follows: the control mechanism includes a fixed sleeve, the fixed sleeve includes a sleeve body that is plugged into and matched with the lower water hole and has an inner groove on the bottom surface, and a sleeve cover arranged on the bottom surface of the sleeve body, the top surface of the sleeve body is provided with an upper water hole connected with the inner groove, the bottom surface of the sleeve cover is provided with a through hole, a sliding plate is slidably arranged in the inner groove, the end surface of the sliding plate facing the upper water hole is provided with a plug for blocking the upper through hole, the end surface of the sliding plate facing the through hole is provided with a spring cover that passes through the through hole and slides with the through hole, the bottom surface of the spring cover is provided with a lower water hole whose upper end extends into the plug, the outer wall of the plug is provided with a plurality of connecting holes connected with the lower water hole, and a plurality of push plate springs are provided between the sliding plate and the sleeve cover.

[0014] The present invention is further configured as follows: a plurality of guide columns inserted into the inner groove are provided on the end surface of the cover facing the inner groove; a plurality of guide holes for the guide columns to pass through and slide with the guide columns are opened on the sliding plate; and the push plate spring is sleeved on the guide columns.

[0015] The present invention is further configured as follows: a fixed flange extending outward from the top of the outer side wall of the sleeve body is abutted against the bottom walls of the sedimentation chamber and the water storage chamber, and the fixed flange is screwed to the bottom walls of the sedimentation chamber and the water storage chamber.

[0016] The present invention is further configured as follows: a lower drainage pipe buried in the cast-in-place concrete of the sidewalk is provided under each of the water reservoirs, a lower water inlet hole connected to the sewer hole is provided on the top surface of the lower drainage pipe, a plurality of connecting convex rings that are plugged into and cooperate with the sewer holes are provided on the top surface of the lower drainage pipe, a drainage ditch is buried in the carriageway, and an inclined drainage pipe is provided between the drainage ditch and the lower drainage pipe.

[0017] The present invention is further configured as follows: a pool cover is provided on the top surface of the pool body to seal the sedimentation chamber and the water storage chamber; a fire pump is provided on the pool cover and is located directly above the water storage tank; and the water inlet of the fire pump is connected to a pumping pipe that passes through the pool cover and extends into the water storage chamber.

[0018] To sum up, the beneficial technical effects of the present invention are as follows: by adding a water storage tank in the sidewalk, the tunnel waterproofing and drainage system can have a backup water source for fire fighting in the tunnel, which is beneficial to further ensure the safety of people in the tunnel and avoid huge economic losses to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional structural diagram of the tunnel waterproof drainage system of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the longitudinal drain pipe, the transverse drain pipe, and the outlet pipe in the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the longitudinal drainage pipe, transverse drainage pipe, geotextile, and outlet pipe in the present invention;

[0022] Figure 4 It is a cross-sectional structural diagram of the sidewalk, water outlet pipe, longitudinal drainage pipe, and transverse drainage pipe in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the water filter frame of the present invention;

[0024] Figure 6 It is a half-section structural schematic diagram of the control mechanism in the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the control mechanism without the sleeve in the present invention;

[0026] Figure 8 It is a structural schematic diagram of the lower drainage pipe in the present invention.

[0027] In the above figures: 1. Tunnel body; 11. Primary lining; 12. Secondary lining; 2. Tunnel; 3. Driving lane; 4. Sidewalk; 5. Longitudinal groove; 6. Longitudinal drain pipe; 7. Tee pipe; 8. Outlet pipe; 9. Horizontal ring groove; 10. Horizontal drain pipe; 13. Geotextile; 14. Cast-in-place concrete; 15. Reservoir; 151. Reservoir body; 152. Reservoir cover; 16. Sedimentation chamber; 17. Reservoir; 18. Side water inlet; 19. Water filter hole; 20. Water filter frame; 201. Hollow frame; 202. Stainless steel filter screen ; 203, mounting plate; 21, fire pump; 22, suction pipe; 23, drain hole; 24, fixed sleeve; 241, sleeve body; 242, sleeve cover; 25, fixed flange; 26, inner groove; 27, upper water hole; 28, perforation; 29, sliding plate; 30, plug; 31, spring cover; 32, lower water hole; 33, connecting hole; 34, guide column; 35, guide hole; 36, push plate spring; 37, lower drain pipe; 38, lower water inlet hole; 39, connecting convex ring; 40, drainage ditch; 41, inclined drain pipe. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below with reference to the accompanying drawings and specific implementation methods.

[0029] like Figure 1 As shown, the present invention proposes a tunnel waterproof drainage system, which includes a tunnel body 1 having a tunnel 2, a driving lane 3 for driving and sidewalks 4 located on both sides of the driving lane 3 are provided at the bottom of the tunnel 2.

[0030] like Figure 1 As shown, the tunnel body 1 includes a primary lining 11 and a secondary lining 12 located inside the primary lining 11 .

[0031] like Figure 1 and 2 As shown, the primary lining 11 is the initial support. The primary lining 11 is a reinforced concrete structure, mainly composed of steel mesh and concrete. Two longitudinal grooves 5 are symmetrically opened on the inner wall of the primary lining 11. The longitudinal grooves 5 are dug out by chiseling, and the length direction of the longitudinal grooves 5 is the same as the longitudinal direction of the tunnel body 1. Each longitudinal groove 5 is embedded with a plurality of longitudinal drainage pipes 6 connected in sequence along the longitudinal direction of the tunnel body 1. Adjacent longitudinal drainage pipes 6 are connected by a tee pipe 7, and each longitudinal drainage pipe 6 is connected to an outlet pipe 8. When burying the longitudinal drainage pipes 6, workers can drive steel nails into both sides of the longitudinal drainage pipes 6, and then use iron wires with both ends wrapped around the two steel nails to clamp the longitudinal drainage pipes 6. After the longitudinal drainage pipes 6 are buried, the notches of the longitudinal grooves 5 are sealed with fast-hardening cement mortar, and then the fast-hardening cement mortar is smoothed with a trowel. After the construction is completed, its surface should be smooth and must not invade the secondary lining 12.

[0032] like Figure 1 and 3 As shown, transverse annular grooves 9 are spaced apart on the inner wall of the primary lining 11. These grooves are circumferentially arranged along the cross-section of the tunnel body 1. These grooves are excavated by chiseling, with one groove 9 being opened every 12 meters in the normal section and every 6 meters in the water-rich section. Each transverse annular groove 9 is embedded with a transverse drainage pipe 10, which is a perforated corrugated pipe wrapped with a geotextile 13. Water that seeps into the transverse annular groove 9 is filtered by the geotextile 13 before entering the transverse drainage pipe 10 through the openings of the perforated corrugated pipe. This prevents blockage of the transverse drainage pipe 10 to a certain extent. The transverse drainage pipe 10 is connected to the longitudinal drainage pipe 6 via a tee 7. When burying the transverse drainage pipe 10, workers can drive steel nails into both sides of the transverse drainage pipe 10 and then secure it with wire wrapped around the two steel nails at both ends. After the transverse drainage pipe 10 is buried, the notch of the transverse annular groove 9 is sealed with rapid-hardening cement mortar, and then the rapid-hardening cement mortar is smoothed with a trowel. After the construction is completed, its surface should be smooth and should not invade the secondary lining 12.

[0033] like Figure 1 As shown, the secondary lining 12 includes a protective geotextile 13, a waterproof board, and a reinforced concrete layer.

[0034] Using a workbench, the geotextile sheet 13 is laid on the inner wall of the primary lining 11. Each geotextile sheet 13 is connected to the previous one by overlapping, with an overlap width of at least 5 cm. A dedicated nail gun is used to drive hot-melt washers and steel nails to secure the geotextile sheet 13 to the inner wall of the primary lining 11. After the primary lining 11 is completed, the inner wall of the primary lining 11 will inevitably have many burrs. Laying the geotextile sheet 13 can, to a certain extent, protect the waterproofing sheet from being punctured by these burrs, thereby preventing leakage.

[0035] The waterproof sheet is an impermeable material that prevents liquid leakage. The waterproof sheet is connected to the geotextile 13 using waterproof adhesive. In this embodiment, epoxy sealant is used to connect the waterproof sheet and geotextile 13. Epoxy sealant has the advantages of good waterproofness and room-temperature curing. During construction, workers first apply epoxy sealant to the geotextile 13 and then lay the waterproof sheet. Once the epoxy sealant cures, the waterproof sheet is secured, and the epoxy sealant and waterproof sheet form a double waterproof layer, achieving a good waterproof effect.

[0036] The reinforced concrete layer is a reinforced concrete structure, which includes steel mesh and concrete. During construction, workers first set up the steel mesh on the inside of the waterproof board, and then pour concrete to form the reinforced concrete layer.

[0037] like Figure 1 and4 As shown, the sidewalk 4 includes cast-in-place concrete 14 and water reservoirs 15 spaced longitudinally along the tunnel body 1. The water reservoirs 15 are prefabricated and located at the upper portion of the sidewalk 4. The water reservoirs 15 include a tank body 151 and a tank cover 152. The tank body 151 is embedded in the cast-in-place concrete 14 of the sidewalk 4. A sedimentation chamber 16 and a water storage chamber 17 are provided on the top surface of the tank body 151. Both the sedimentation chamber 16 and the water storage chamber 17 are composed of a rectangular chamber at the upper portion and a funnel chamber at the lower portion. The sedimentation chamber 16 is located on the side of the water storage chamber 17 close to the outlet pipe 8. A side water inlet 18 communicating with the outlet pipe 8 is provided through the bottom of the wall of the sedimentation chamber 16. Figure 5 As shown, the top surface of the tank body 151 is provided with a water filter hole 19 that connects the sedimentation chamber 16 and the water storage chamber 17. A water filter frame 20, which has a water filtering function, is located within the water filter hole 19. The water filter frame 20 comprises a hollow frame 201 and a stainless steel filter screen 202. The hollow frame 201 has a square ring-shaped cross-section. A mounting plate 203, which conforms to the inner wall of the water storage tank 15, is integrally connected to the side wall of the hollow frame 201. The mounting plate 203 is screwed to the inner wall of the water storage tank 15. A tank cover 152 is screwed to the top surface of the tank body 151. The cover 152 is used to seal the sedimentation chamber 16 and the water storage chamber 17 and does not provide a foothold for pedestrians. A fire pump 21 is fixedly mounted on the cover 152. The fire pump 21 is located directly above the water storage chamber 17. The water inlet of the fire pump 21 is connected to a pumping pipe 22 that passes through the cover 152 and extends into the water storage chamber 17.

[0038] like Figure 4 and 6 As shown, a drain hole 23 with a circular cross-section is provided on the bottom wall of the sedimentation chamber 16 and the water storage chamber 17, and a control mechanism is provided in each drain hole 23. The control mechanism includes a fixed sleeve 24 arranged in the drain hole 23, and the fixed sleeve 24 includes a sleeve body 241 and a sleeve cover 242. The sleeve body 241 is cylindrical and is plugged into the drain hole 23. A fixed flange 25 extends outward from the top of the outer wall of the sleeve body 241, and the fixed flange 25 is screwed to the bottom wall of the sedimentation chamber 16 and the water storage chamber 17. An inner groove 26 with a circular cross-section is provided on the bottom surface of the sleeve body 241, and an upper water hole 27 connected to the inner groove 26 is provided on the top surface of the sleeve body 241. The sleeve cover 242 is screwed to the bottom surface of the sleeve body 241 and closes the inner groove 26. A circular through hole 28 is provided on the bottom surface of the sleeve cover 242, and the cross section of the sleeve cover 242 is annular.

[0039] like Figure 6 and 7As shown, a disc-shaped sliding plate 29 is slidably disposed within the inner tank 26. A plug 30 is integrally connected to the end surface of the sliding plate 29 facing the upper water hole 27. When plug 30 engages with the upper water hole 27, it blocks the upper water hole 27, thereby restricting water flow through the upper water hole 27. A spring cover 31 is integrally connected to the end surface of the sliding plate 29 facing the through hole 28. The spring cover 31 extends through the through hole 28 and slidably engages with it. A circular lower water hole 32 is defined on the bottom surface of the spring cover 31, the upper end of which extends into the plug 30. Four communication holes 33 are equidistantly defined on the outer wall of the plug 30. These communication holes 33 are fan-shaped in cross section and communicate with the lower water hole 32, allowing water entering the inner tank 26 to enter the lower water hole 32 through the communication holes 33.

[0040] like Figure 6 and 7 As shown, four cylindrical guide posts 34 are fixedly connected to the end surface of the cover 242 facing the inner groove 26. The four guide posts 34 are equidistantly distributed around the circumference and are all inserted into the inner groove 26. The top surfaces of the guide posts 34 abut against the inner groove 26 wall facing away from the cover 242. Four circular guide holes 35 are equidistantly defined on the sliding plate 29. The guide posts 34 pass through the guide holes 35, and the guide holes 35 and the guide posts 34 slidably engage with each other, allowing the sliding plate 29 and the plug 30 to perform relatively stable vertical linear motion within the inner groove 26.

[0041] like Figure 6 and 7 As shown, each guide column 34 is provided with a push plate spring 36, one end of the push plate spring 36 is against the end surface of the sliding plate 29 facing the cover 242, and the other end is against the end surface of the cover 242 facing the sliding plate 29. The push plate spring 36 is used to push the sliding plate 29 and the plug 30 upward, so that the plug 30 can block the upper water hole 27.

[0042] like Figure 4 and 8 As shown, a lower drainage pipe 37 is provided under each water reservoir 15. The lower drainage pipe 37 is buried in the cast-in-place concrete 14 of the sidewalk 4. The lower drainage pipe 37 is a rectangular tube. A lower water inlet hole 38 connected to the lower water hole 23 is opened on the top surface of the lower drainage pipe 37. A connecting protrusion 39 is integrally connected to the top surface of the lower drainage pipe 37. The cross-section of the connecting protrusion 39 is a rectangular ring. The hollow part of the connecting protrusion 39 is connected to the lower water inlet hole 38. The connecting protrusion 39 is plugged into the lower water hole 23, and the top surface of the connecting protrusion 39 is against the bottom surface of the cover 242.

[0043] like Figure 1As shown, a drainage ditch 40 is buried in the carriageway 3. The drainage ditch 40 is a prefabricated resin integrated drainage ditch 40. The drainage ditch 40 is spliced ​​in sequence along the longitudinal direction of the tunnel body 1. The drainage ditch 40 is located below the water reservoir 15 in the horizontal direction. An inclined drainage pipe 41 is provided between the drainage ditch 40 and the lower drainage pipe 37 for connecting the two. The inclined drainage pipe 41 is provided at an angle.

[0044] The detailed working process of this embodiment is as follows: the fissure water on the periphery of the tunnel body 1 will enter the transverse annular groove 9, and the fissure water that penetrates into the transverse annular groove 9 will be filtered by the geotextile 13 and then enter the transverse drainage pipe 10 through the opening of the perforated corrugated pipe. Since the transverse drainage pipe 10 is annular, the fissure water in the transverse drainage pipe 10 will flow into the longitudinal drainage pipe 6 under the action of gravity, and then flow through the outlet pipe 8, the side water inlet hole 18 and enter the sedimentation chamber 16 of the water reservoir 15 in sequence. The fissure water mixed with a small amount of sediment will be discharged in the sedimentation chamber 16. Sedimentation occurs in the sedimentation chamber 16, and the clearer fissure water in the upper layer enters the water storage chamber 17 after being filtered by the stainless steel filter mesh 202 in the filter water rack 20. The fissure water in the water storage chamber 17 will also be precipitated. When a fire occurs in the tunnel, people can pump out the water in the water storage chamber 17 through the fire pump 21 and the pumping pipe 22 and use it to extinguish the fire. The water stored in the water storage chamber 17 can be used as a backup water source for fire extinguishing. This can further ensure the safety of people in the tunnel and avoid huge economic losses to a certain extent.

[0045] When the water resources stored in the sedimentation chamber 16 and the water storage chamber 17 reach a certain water level, the gravity of the water acts on the plug 30, and the push plate spring 36 will be compressed until the plug 30 descends into the inner groove 26. The sediment and sand settled at the bottom of the sedimentation chamber 16 and the water storage chamber 17 enter the inner groove 26 together with the water through the upper water hole 27, and then flow through the connecting hole 33, the lower water hole 32, and the lower water inlet hole 38 in sequence and enter the lower drain pipe 37. The water mixed with sediment in the lower drain pipe 37 enters the drain ditch 40 through the inclined drain pipe 41 and is finally discharged along the drain ditch 40.

[0046] The tunnel waterproof drainage system adds a water storage tank 15 in the sidewalk 4, so that the tunnel can have a backup water source for fire fighting, which is beneficial to further ensure the safety of people in the tunnel and avoid huge economic losses to a certain extent.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A tunnel waterproof drainage system, comprising a tunnel body (1) having a tunnel (2), a roadway (3) arranged at the bottom of the tunnel (2), and sidewalks (4) located on both sides of the roadway (3), characterized in that: The tunnel body (1) comprises a primary lining (11) and a secondary lining (12) located inside the primary lining (11); a longitudinal groove (5) is provided on the inner wall of the primary lining (11) along the longitudinal direction of the tunnel body (1); adjacent longitudinal drainage pipes (6) are embedded in the longitudinal grooves (5) and are connected through a tee pipe (7); the longitudinal drainage pipes (6) are connected to a water outlet pipe (8) that passes through the secondary lining (12); transverse annular grooves (9) are provided on the inner wall of the primary lining (11) at intervals along the annular direction of the tunnel body (1); transverse drainage pipes (10) are embedded in the transverse annular grooves (9) and are connected to the longitudinal drainage pipe (6) through a tee pipe (7); the sidewalk (4) comprises cast-in-place concrete (14) and a water reservoir (15) provided at intervals along the longitudinal direction of the tunnel body (1); a side water inlet (18) is provided on the side wall of the water reservoir (15) near the water outlet pipe (8) and is connected to the water outlet pipe (8); The water storage tank (15) comprises a tank body (151) embedded in cast-in-place concrete (14); a sedimentation chamber (16) and a water storage tank (15) are provided on the top surface of the tank body (151) and are sequentially distributed in a direction away from the water outlet pipe (8); the side water inlet (18) is connected to the sedimentation chamber (16); a water filter hole (19) is provided on the top surface of the tank body (151) for connecting the sedimentation chamber (16) and the water storage chamber (17); a water filter frame (20) is provided in the water filter hole (19); The water filter frame (20) comprises a hollow frame (201) disposed in the water filter hole (19), a stainless steel filter screen (202) disposed in the hollow portion of the hollow frame (201), and a mounting plate (203) disposed on the side wall of the hollow frame (201) and connected to the inner wall of the water reservoir (15); The bottom walls of the sedimentation chamber (16) and the water storage chamber (17) are both provided with water holes (23), and each of the water holes (23) is provided with a control mechanism for controlling the opening and closing of the water hole (23); The control mechanism comprises a fixed sleeve (24), the fixed sleeve (24) comprising a sleeve body (241) which is plugged into the water hole (23) and has an inner groove (26) on its bottom surface, and a sleeve cover (242) arranged on the bottom surface of the sleeve body (241), an upper water hole (27) which is in communication with the inner groove (26) is arranged on the top surface of the sleeve body (241), a through hole (28) is arranged on the bottom surface of the sleeve cover (242), a sliding plate (29) is slidably arranged in the inner groove (26), and the sliding plate (29) is oriented toward the upper water hole (27). A plug (30) for blocking the upper through hole is provided on the end surface, a spring cover (31) passing through the through hole (28) and slidingly cooperating with the through hole (28) is provided on the end surface of the sliding plate (29) facing the through hole (28), a lower water hole (32) with an upper end extending into the plug (30) is provided on the bottom surface of the spring cover (31), a plurality of communicating holes (33) communicating with the lower water hole (32) are provided on the outer side wall of the plug (30), and a plurality of push plate springs (36) are provided between the sliding plate (29) and the cover (242).

2. A tunnel waterproof drainage system according to claim 1, characterized in that: The transverse drainage pipe (10) is a perforated corrugated pipe, and the transverse drainage pipe (10) is wrapped with a geotextile (13).

3. The tunnel waterproof drainage system according to claim 1, characterized in that: The cover (242) is provided with a plurality of guide posts (34) inserted into the inner groove (26) on its end surface facing the inner groove (26); the sliding plate (29) is provided with a plurality of guide holes (35) for the guide posts (34) to pass through and for slidingly engaging with the guide posts (34); the push plate spring (36) is sleeved on the guide posts (34).

4. The tunnel waterproof drainage system according to claim 1, characterized in that: A fixed flange (25) extends outward from the top of the outer side wall of the sleeve (241) and abuts against the bottom walls of the sedimentation chamber (16) and the water storage chamber (17). The fixed flange (25) is screwed to the bottom walls of the sedimentation chamber (16) and the water storage chamber (17).

5. The tunnel waterproof drainage system according to claim 1, characterized in that: A lower drainage pipe (37) is provided below each of the water reservoirs (15) and is buried in the cast-in-place concrete (14) of the sidewalk (4). A lower water inlet hole (38) communicating with the lower water hole (23) is provided on the top surface of the lower drainage pipe (37). A plurality of connecting protruding rings (39) plugged into and matched with the lower water holes (23) are provided on the top surface of the lower drainage pipe (37). A drainage ditch (40) is buried in the carriageway (3), and an inclined drainage pipe (41) is provided between the drainage ditch (40) and the lower drainage pipe (37).

6. The tunnel waterproof drainage system according to claim 1, characterized in that: A pool cover (152) is provided on the top surface of the pool body (151) to seal the sedimentation chamber (16) and the water storage chamber (17). A fire pump (21) is provided on the pool cover (152) and is located directly above the water storage tank (15). The water inlet of the fire pump (21) is connected to a water pumping pipe (22) that penetrates the pool cover (152) and extends into the water storage chamber (17).

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