Waterproof structure for subsurface tunnel

Abstract

The utility model relates to the technical field of tunnel waterproofing, and discloses a waterproof structure for a subsurface tunnel, which comprises a primary support layer and a reinforcing layer, a waterproof layer is arranged in the primary support layer, a buffer layer is arranged on the inner wall of the waterproof layer, a waterproof plate is arranged on the inner wall of the buffer layer, and the reinforcing layer is arranged on the inner wall of the waterproof plate. A plurality of transverse drainage blind pipes are fixedly installed in the waterproof plate at equal intervals, the left ends and the right ends of the bottoms of the transverse drainage blind pipes communicate with longitudinal drainage blind pipes, and the two longitudinal drainage blind pipes are fixedly connected to the left end and the right end of the bottom of the waterproof plate correspondingly. The primary support layer provides a foundation for the waterproof layer, the waterproof layer blocks most of water flow, the buffer layer protects the waterproof layer, the transverse drainage blind pipes collect permeated water and guide the permeated water into the longitudinal drainage blind pipes to be drained, and the effects of effectively preventing underground water from permeating, reducing water pressure in the tunnel and guaranteeing stability and safety of the tunnel structure are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel waterproof technology field especially relates to a waterproof structure for tunneling. BACKGROUND

[0002] The waterproof structure of the tunneling is a comprehensive system for preventing groundwater penetration, and if groundwater flows into the tunnel in large quantities, it will have a serious impact on the normal use of the tunnel, will lead to track waterlogging affecting the normal operation of the subway train, or make the road surface of the highway tunnel wet and slippery, increase the risk of traffic accidents, and at the same time, groundwater contains various minerals and chemicals, and long-term soaking of the tunnel structure will have an erosion effect on building materials such as concrete, reducing the strength and durability of the tunnel structure.

[0003] After searching, the Chinese patent publication No. CN219472124U discloses a waterproof structure for tunneling, pouring initial support concrete on the surface of the tunnel surrounding rock, setting two waterproof layers on the surface of the initial support concrete, then setting a steel mesh on the surface of the waterproof layer, and pouring secondary lining concrete on the surface of the steel mesh; the initial support concrete surface of the tunnel inverted arch has two waterproof layers and a fine stone concrete protective layer, and the secondary lining concrete is poured on the surface of the fine stone concrete protective layer; the two waterproof layers are polymer modified waterproof mortar and acrylic salt spray membrane waterproof material respectively; the construction joint and the deformation joint are respectively provided with a waterproof reinforcing layer, the waterproof structure is convenient to construct, is integrally close, increases chemical bonding, prevents water leakage, and is safe to construct, but the structure focuses on the construction of the waterproof layer and the pouring of the concrete when designing, only relies on the compactness of the initial support concrete and the secondary lining concrete to block the groundwater, and no special drainage pipeline is arranged, when the groundwater pressure is large or the water quantity is large, the groundwater cannot be discharged in time and effectively, the groundwater will accumulate between the waterproof layer and the tunnel structure, the water pressure is increased, and long-term use will cause the waterproof layer to peel off and the structure to be damaged, seriously affecting the waterproof performance and structural safety of the tunnel. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a waterproof structure for tunneling, aiming at improving the problem that in the prior art, when the groundwater pressure is large or the water quantity is large, the groundwater cannot be discharged in time and effectively, and long-term use will cause the waterproof layer to peel off and the structure to be damaged.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a waterproof structure for a dark excavated tunnel, comprising an initial support layer and a reinforcement layer, a waterproof layer is provided inside the initial support layer, a buffer layer is provided on the inner wall of the waterproof layer, a waterproof board is provided on the inner wall of the buffer layer, a plurality of transverse drainage blind pipes are fixedly installed at equal intervals inside the waterproof board, the left and right ends of the bottoms of the plurality of transverse drainage blind pipes are connected to longitudinal drainage blind pipes, two of the longitudinal drainage blind pipes are fixedly connected to the left and right ends of the bottoms of the waterproof board respectively, a plurality of seepage holes are provided on the outer walls of the two longitudinal drainage blind pipes at equal intervals, an anti-filtration assembly is provided on the outside of the longitudinal drainage blind pipe, and a lining structure is provided inside the waterproof board.

[0006] Through the above technical solution: the initial support layer provides a foundation for the waterproof layer, the waterproof layer blocks most of the water flow, the buffer layer protects the waterproof layer, and the horizontal drainage blind pipe collects the infiltrated water and guides it into the longitudinal drainage blind pipe for discharge, thereby effectively preventing groundwater infiltration, reducing the water pressure in the tunnel, and ensuring the stability and safety of the tunnel structure.

[0007] As a further description of the above technical solution:

[0008] The lining structure includes a plurality of fixing nails, and the plurality of fixing nails are all passed through the interior of the waterproof board. The ends of the plurality of fixing nails respectively pass through the waterproof board, the buffer layer, the waterproof layer and the initial support layer. A lining layer is provided between the adjacent waterproof board and the reinforcement layer. A plurality of arc-shaped transverse steel bars are fixedly connected at equal intervals inside the lining layer. Long longitudinal steel bars are fixedly connected at equal intervals between the adjacent plurality of arc-shaped transverse steel bars. Steel wire ropes are provided at the plurality of intersections of the plurality of arc-shaped transverse steel bars and the long longitudinal steel bars. The plurality of steel wire ropes are used to fasten the plurality of arc-shaped transverse steel bars to the long longitudinal steel bars.

[0009] Through the above technical solution: the lining structure is anchored to the inner wall of the tunnel by fixing nails, the arc-shaped transverse steel bars are interwoven with the long longitudinal steel bars and fastened into a skeleton by steel wire ropes, and used in conjunction with the waterproof board to achieve the effect of enhancing the stability and strength of the lining structure, uniformly loading the structure, and ensuring the tunnel structure is stable, waterproof and safe to operate.

[0010] As a further description of the above technical solution:

[0011] The reverse filtration component includes fine crushed stones, which are arranged outside the longitudinal drainage blind pipe, and coarse crushed stones are arranged outside the fine crushed stones.

[0012] Through the technical scheme, the fine gravel in the filter component can preliminarily filter the water flow entering the drainage blind pipe and intercept the fine silt particle impurities in the water, and the coarse gravel can further filter the water flow permeating from the outside and block the impurities such as the large-particle-size soil and stone, thereby enhancing the overall filter effect.

[0013] As a further description of the technical scheme:

[0014] The initial support layer is a concrete structure, which is sprayed to the surface of the tunnel surrounding rock, the waterproof layer is preliminarily waterproofed by using waterproof cloth, the buffer layer is buffered by using elastic foam, and the reinforcing layer is fixed by splicing steel plates.

[0015] Through the technical scheme, the initial support layer is sprayed with concrete to the surface of the tunnel surrounding rock, which can be quickly and closely combined with the surrounding rock, thereby supporting and reinforcing the surrounding rock in time, the waterproof layer can effectively block the infiltration of underground water from the outside of the tunnel, thereby avoiding a large amount of water from entering the tunnel, and protecting the internal structure of the tunnel from erosion by water, and the buffer layer is made of elastic foam, which can reduce the impact force from the outside during the use of the tunnel.

[0016] As a further description of the technical scheme:

[0017] The lining layer is formed by splicing a plurality of prefabricated concrete structures.

[0018] Through the technical scheme, the lining layer is formed by splicing a plurality of prefabricated concrete structures, which can enhance the structural strength and stability of the tunnel as a whole.

[0019] As a further description of the technical scheme:

[0020] The reinforcing layer and the bottom and left and right ends of the lining layer are provided with water stop belts, and the distal ends of the two water stop belts are in close contact with the two coarse gravels.

[0021] Through the technical scheme, the water stop belt plays a role in stopping water and sealing, and one end is in close contact with the coarse gravel, which can effectively prevent underground water from seeping into the tunnel from the junction, the bottom and other parts of the reinforcing layer and the lining layer.

[0022] As a further description of the technical scheme:

[0023] The adjacent ends of the plurality of fixing nails are fixedly connected with waterproof caps, and the plurality of fixing nails and the waterproof caps are cast in the inside of the lining layer.

[0024] Through the technical scheme, the waterproof cap at the top of the fixing nail can avoid the underground water from seeping into the tunnel through the gap between the fixing nail and the lining layer, so that the lining structure is stable and will not become a weak link of water seepage.

[0025] Further description of the technical scheme is as follows:

[0026] The two longitudinal drainage blind pipes are both designed with an inclination, and the inclination is high in the middle and low at both sides.

[0027] Through the technical scheme, the inclination of the longitudinal drainage blind pipe, which is high in the middle and low at both sides, utilizes the principle that water flows to low places, so that the collected seepage water can flow to both sides under the action of gravity.

[0028] The utility model has the advantages of:

[0029] 1. In the utility model, the initial support layer provides a foundation for the waterproof layer, the waterproof layer blocks most of the water flow, the buffer layer protects the waterproof layer, the horizontal drainage blind pipe collects the seepage water and introduces it into the longitudinal drainage blind pipe for drainage, thereby effectively preventing the underground water from seeping, reducing the water pressure in the tunnel, and ensuring the stability and safety of the tunnel structure.

[0030] 2. In the utility model, the lining structure is anchored to the inner wall of the tunnel by the fixing nail, the arc-shaped horizontal steel bars and the long longitudinal steel bars are interwoven and fastened into a framework by steel wire ropes, and the waterproof board is used cooperatively, thereby strengthening the stability and strength of the lining structure, uniformly bearing the stress, and ensuring the stability of the tunnel structure, good waterproof performance, and safe operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A perspective view of a waterproof structure for a tunnel excavated by a hidden method is provided in the utility model;

[0032] Figure 2 A front view of a waterproof structure for a tunnel excavated by a hidden method is provided in the utility model;

[0033] Figure 3 A structural schematic view of a waterproof structure for a tunnel excavated by a hidden method is provided in the utility model;

[0034] Figure 4 An internal structural schematic view of a lining layer in a waterproof structure for a tunnel excavated by a hidden method is provided in the utility model;

[0035] Figure 5 A structural schematic view of a longitudinal drainage blind pipe in a waterproof structure for a tunnel excavated by a hidden method is provided in the utility model.

[0036] LEGEND:

[0037] 1. Initial support layer; 2. Lining structure; 201. Fixing nails; 202. Lining layer; 203. Arc-shaped transverse reinforcement; 204. Long longitudinal reinforcement; 205. Steel wire rope; 3. Waterproof layer; 4. Buffer layer; 5. Waterproof board; 6. Reinforcement layer; 7. Transverse drainage blind pipe; 8. Longitudinal drainage blind pipe; 9. Seepage hole; 10. Fine gravel; 11. Coarse gravel; 12. Waterstop; 13. Waterproof cap. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 2 and Figure 5 The utility model provides an embodiment: a waterproof structure for a dark excavated tunnel, comprising an initial support layer 1 and a reinforcement layer 6, a waterproof layer 3 is provided inside the initial support layer 1, a buffer layer 4 is provided on the inner wall of the waterproof layer 3, a waterproof board 5 is provided on the inner wall of the buffer layer 4, a plurality of transverse drainage blind pipes 7 are fixedly installed at equal intervals inside the waterproof board 5, the left and right ends of the bottoms of the plurality of transverse drainage blind pipes 7 are connected with longitudinal drainage blind pipes 8, two longitudinal drainage blind pipes 8 are fixedly connected to the left and right ends of the bottom of the waterproof board 5, a plurality of seepage holes 9 are opened on the outer walls of the two longitudinal drainage blind pipes 8 at equal intervals, an anti-filtration component is provided on the outside of the longitudinal drainage blind pipes 8, and a lining structure 2 is provided inside the waterproof board 5;

[0040] Specifically, the initial support layer 1 serves as the initial support structure of the tunnel, which can bear the pressure from the surrounding soil and provide a stable attachment foundation for the waterproof layer 3. The initial support layer 1 has a certain strength and rigidity, which can prevent the tunnel from collapsing and deforming during construction, ensuring the safe progress of construction. The waterproof layer 3 is located inside the initial support layer 1, which can effectively block the direct penetration of groundwater and prevent moisture from invading the internal structure of the tunnel. The material properties of the waterproof layer 3 give it good waterproof performance and can adapt to the complex geological environment and water pressure conditions of the tunnel. The buffer layer 4 fits tightly to the inner wall of the waterproof layer 3, which can protect the waterproof layer 3 from damage. The buffer layer 4 can buffer and disperse the impact force that may act on the waterproof layer 3, ensuring the integrity of the waterproof layer 3 and the durability of the waterproof effect. The waterproof board 5 is located on the inner wall of the buffer layer 4, which can further enhance the sealing of the waterproof structure. A plurality of horizontal drainage blind pipes 7 fixedly installed at equal distances inside the waterproof board 5 can be used for drainage. When there is a small amount of ground When the water breaks through the waterproof layer 3 and the buffer layer 4, the horizontal drainage blind pipe 7 can collect the water in time. The left and right ends of the bottom of the horizontal drainage blind pipe 7 are connected to the longitudinal drainage blind pipe 8. The two longitudinal drainage blind pipes 8 are fixedly connected to the left and right ends of the bottom of the waterproof board 5, respectively, to form a complete drainage network. The outer walls of the longitudinal drainage blind pipes 8 are evenly spaced with multiple seepage holes 9. These seepage holes 9 can allow the surrounding groundwater to smoothly enter the longitudinal drainage blind pipes 8. When there is groundwater around the tunnel, the water will penetrate into the tunnel through the tiny pores of the initial support layer 1 under pressure. The waterproof layer 3 first blocks most of the water flow. A small amount of infiltrated water is buffered by the buffer layer 4 and reaches the waterproof board 5. At this time, the horizontal drainage blind pipe 7 collects the water and guides it into the longitudinal drainage blind pipe 8. The longitudinal drainage blind pipe 8 continuously collects the surrounding seepage water through the seepage holes 9, and then discharges the water to the outside of the tunnel along the longitudinal direction, thereby effectively reducing the water pressure inside the tunnel and preventing water accumulation from damaging the tunnel structure.

[0041] Reference Figure 2 、 Figure 3 and Figure 4 The lining structure 2 includes a plurality of fixing nails 201, and the plurality of fixing nails 201 are all penetrated inside the waterproof board 5. The ends of the plurality of fixing nails 201 respectively penetrate the waterproof board 5, the buffer layer 4, the waterproof layer 3 and the initial support layer 1. A lining layer 202 is provided between the adjacent portions of the waterproof board 5 and the reinforcement layer 6. A plurality of arc-shaped transverse steel bars 203 are fixedly connected at equal intervals inside the lining layer 202. Long longitudinal steel bars 204 are fixedly connected at equal intervals between adjacent portions of the plurality of arc-shaped transverse steel bars 203. Steel wire ropes 205 are provided at the plurality of intersections of the plurality of arc-shaped transverse steel bars 203 and the long longitudinal steel bars 204. The plurality of steel wire ropes 205 are used to fasten the plurality of arc-shaped transverse steel bars 203 and the long longitudinal steel bars 204.

[0042] Specifically, a plurality of fixing nails 201 penetrate the waterproof board 5, the buffer layer 4, the waterproof layer 3 and the initial support layer 1, and can firmly fix the lining structure 2 on the inner wall of the tunnel. The fixing nails 201 provide a reliable anchoring force for the entire lining system, so that the lining layer 202 can fit tightly on the waterproof board 5, preventing displacement or loosening due to various external forces during subsequent use, thereby ensuring the integrity and stability of the tunnel structure. A plurality of arc-shaped transverse steel bars 203 and long longitudinal steel bars 204 that are equidistantly fixed and connected inside the lining layer 202 are interwoven to form a solid steel skeleton. The arc-shaped transverse steel bars 203 are arranged along the transverse direction of the tunnel and can effectively resist the transverse pressure of the tunnel. The long longitudinal steel bars 204 are distributed along the longitudinal direction, which enhances the longitudinal strength of the tunnel. The synergistic effect of the two greatly improves the strength and rigidity of the lining layer 202, which is sufficient to withstand the complex loads from the surrounding soil and superstructure, ensuring that the tunnel will not be excessively deformed or damaged during use. The steel wire ropes 205 arranged at multiple intersections of the arc-shaped transverse steel bars 203 and the long longitudinal steel bars 204 can tightly bind the steel bars together, so that the entire steel skeleton forms an organic whole. In this way, when bearing loads, the force can be evenly distributed on the entire steel skeleton, avoiding structural damage caused by local stress concentration, further enhancing the stability and reliability of the lining structure 2, and together with the waterproof board 5, constructing a solid and well-watertight internal structural system of the dark-excavated tunnel, ensuring the safe operation and long-term use of the tunnel.

[0043] Reference Figure 1 、 Figure 2 and Figure 3 The filter assembly includes fine crushed stone 10, which is arranged outside the longitudinal drainage blind pipe 8. Coarse crushed stone 11 is arranged outside the fine crushed stone 10; the initial support layer 1 is a concrete structure, which is sprayed onto the surface of the tunnel surrounding rock. The waterproof layer 3 uses waterproof cloth for preliminary waterproofing. The buffer layer 4 uses elastic foam for buffering. The reinforcement layer 6 is fixed by splicing steel plates. The lining layer 202 is composed of multiple precast concrete structures.

[0044] Specifically, the fine gravel 10 in the filter assembly can play a preliminary filtering role on the water flow entering the drainage blind pipe, and can intercept relatively fine silt particle impurities in the water, while the coarse gravel 11 can further filter the water flow permeated from the outside, block larger particle size of soil, stone and other impurities, and strengthen the overall filtration effect. The primary support layer 1 sprays concrete to the surface of the tunnel surrounding rock, which can quickly and closely adhere to the surrounding rock, timely support and reinforce the surrounding rock, and the waterproof layer 3 uses waterproof cloth to effectively block the infiltration of external underground water in the tunnel, avoid a large amount of water entering the tunnel, thereby protecting the internal structure of the tunnel from water erosion, and the buffer layer 4 uses elastic foam to reduce the impact force from the outside during the use of the tunnel, and the lining layer 202 is composed of a plurality of prefabricated concrete structures, which can enhance the overall structural strength and stability of the tunnel.

[0045] With reference to Figure 1 , Figure 2 and Figure 3 , the reinforcing layer 6 and the bottom and left and right ends of the lining layer 202 are provided with water stop belts 12, and the distal ends of the two water stop belts 12 are in close contact with the two coarse gravels 11; the adjacent ends of the plurality of fixing nails 201 are fixedly connected with waterproof caps 13, and the plurality of fixing nails 201 and the waterproof caps 13 are cast in the inside of the lining layer 202; the two longitudinal drainage blind pipes 8 are designed with an inclination, and the inclination is high in the middle and low at both sides;

[0046] Specifically, the water stop belt 12 plays a role of water stop and sealing, and one end is in close contact with the coarse gravel 11, which can effectively prevent underground water from seeping into the tunnel from the connection part, the bottom and other parts of the reinforcing layer 6 and the lining layer 202, the waterproof cap 13 at the top of the fixing nail 201 and the fixing nail 201 can avoid the seepage of underground water into the tunnel through the gap between the fixing nail 201 and the lining layer 202, so as to ensure that the lining structure 2 is stable and will not become a weak link of water seepage, and the inclination of the longitudinal drainage blind pipe 8 is high in the middle and low at both sides, which utilizes the principle that water flows downward, so that the collected seepage water can flow smoothly to both sides under the action of gravity.

[0047] Working principle: The initial support layer 1 serves as the initial support structure of the tunnel, which can bear the pressure from the surrounding soil and provide a stable attachment foundation for the waterproof layer 3. The initial support layer 1 has a certain strength and rigidity, which can prevent the tunnel from collapsing and deforming during construction, ensuring the safe construction. The waterproof layer 3 is located inside the initial support layer 1, which can effectively block the direct penetration of groundwater and prevent moisture from invading the internal structure of the tunnel. The material properties of the waterproof layer 3 give it good waterproof performance and can adapt to the complex geological environment and water pressure conditions of the tunnel. The buffer layer 4 fits tightly to the inner wall of the waterproof layer 3 to protect the waterproof layer 3 from damage. The buffer layer 4 can buffer and disperse the impact force that may act on the waterproof layer 3, ensuring the integrity of the waterproof layer 3 and the durability of the waterproof effect. The waterproof board 5 is located on the inner wall of the buffer layer 4, which can further enhance the sealing of the waterproof structure. Multiple horizontal drainage panels are fixedly installed at equal distances inside the waterproof board 5. The blind pipe 7 can be used for drainage. When a small amount of groundwater breaks through the waterproof layer 3 and the buffer layer 4, the horizontal drainage blind pipe 7 can collect this water in time. The left and right ends of the bottom of the horizontal drainage blind pipe 7 are connected to the longitudinal drainage blind pipe 8. The two longitudinal drainage blind pipes 8 are fixedly connected to the left and right ends of the bottom of the waterproof board 5, respectively, to form a complete drainage network. The outer wall of the longitudinal drainage blind pipe 8 is evenly spaced with a plurality of seepage holes 9. These seepage holes 9 can allow the surrounding groundwater to smoothly enter the longitudinal drainage blind pipe 8. When there is groundwater around the tunnel, the water will penetrate into the tunnel through the tiny pores of the initial support layer 1 under pressure. The waterproof layer 3 first blocks most of the water flow. The small amount of infiltrated water is buffered by the buffer layer 4 and then reaches the waterproof board 5. At this time, the horizontal drainage blind pipe 7 collects this water and guides it into the longitudinal drainage blind pipe 8. The longitudinal drainage blind pipe 8 continuously collects the surrounding seepage water through the seepage holes 9, and then discharges the water to the outside of the tunnel along the longitudinal direction.

[0048] And, the plurality of fixed nails 201 penetrate the waterproof plate 5, the buffer layer 4, the waterproof layer 3 and the initial support layer 1, and can firmly fix the lining structure 2 on the inner wall of the tunnel, the fixed nails 201 provide reliable anchoring force for the whole lining system, and the lining layer 202 can be closely attached to the waterproof plate 5, displacement or loosening caused by various external forces in the subsequent use process is prevented, so that the integrity and stability of the tunnel structure are ensured, the plurality of arc-shaped transverse steel bars 203 and the long longitudinal steel bars 204 fixedly connected at equal intervals in the lining layer 202 are interwoven to form a firm steel framework, the arc-shaped transverse steel bars 203 are arranged along the transverse direction of the tunnel, and the pressure in the transverse direction of the tunnel can be effectively resisted, and the long longitudinal steel bars 204 are distributed along the longitudinal direction, and the load-carrying capacity in the longitudinal direction of the tunnel is enhanced, the strength and rigidity of the lining layer 202 are greatly improved through the synergistic effect of the two, and the complex load from the surrounding soil body and the upper structure can be borne, so that excessive deformation or damage of the tunnel during use is prevented, and the steel wire ropes 205 arranged at the plurality of intersections of the arc-shaped transverse steel bars 203 and the long longitudinal steel bars 204 can tightly bind the steel bars together, so that the whole steel framework forms an organic whole, so that when the load is borne, the force can be uniformly distributed on the whole steel framework, and structural damage caused by local stress concentration is avoided.

[0049] Finally, it should be pointed out that: the above only preferred embodiments of the utility model have described, and do not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A waterproof structure for a dark tunnel, comprising an initial support layer (1) and a reinforcement layer (6), characterized in that: A waterproof layer (3) is provided inside the initial support layer (1), a buffer layer (4) is provided on the inner wall of the waterproof layer (3), a waterproof board (5) is provided on the inner wall of the buffer layer (4), a plurality of transverse drainage blind pipes (7) are fixedly installed at equal intervals inside the waterproof board (5), the left and right ends of the bottoms of the plurality of transverse drainage blind pipes (7) are connected to longitudinal drainage blind pipes (8), two longitudinal drainage blind pipes (8) are fixedly connected to the left and right ends of the bottom of the waterproof board (5), a plurality of seepage holes (9) are provided on the outer walls of the two longitudinal drainage blind pipes (8) at equal intervals, a filter assembly is provided outside the longitudinal drainage blind pipes (8), and a lining structure (2) is provided inside the waterproof board (5).

2. The waterproof structure for a dark tunnel according to claim 1, characterized in that: The lining structure (2) comprises a plurality of fixing nails (201), the plurality of fixing nails (201) are all penetrated inside the waterproof board (5), the ends of the plurality of fixing nails (201) respectively penetrate the waterproof board (5), the buffer layer (4), the waterproof layer (3) and the initial support layer (1), a lining layer (202) is provided between the adjacent portions of the waterproof board (5) and the reinforcement layer (6), a plurality of arc-shaped transverse steel bars (203) are fixedly connected at equal intervals inside the lining layer (202), a plurality of adjacent arc-shaped transverse steel bars (203) are fixedly connected at equal intervals with long longitudinal steel bars (204), steel wire ties (205) are provided at a plurality of intersections between the plurality of arc-shaped transverse steel bars (203) and the long longitudinal steel bars (204), and the plurality of steel wire ties (205) are used to fasten the plurality of arc-shaped transverse steel bars (203) and the long longitudinal steel bars (204).

3. The waterproof structure for a dark tunnel according to claim 1, characterized in that: The reverse filtration assembly comprises fine crushed stones (10), the fine crushed stones (10) being arranged outside the longitudinal drainage blind pipe (8), and coarse crushed stones (11) being arranged outside the fine crushed stones (10).

4. The waterproof structure for a dark tunnel according to claim 1, characterized in that: The initial support layer (1) is a concrete structure, which is sprayed onto the tunnel surrounding rock surface. The waterproof layer (3) is initially waterproofed using waterproof cloth. The buffer layer (4) is buffered using elastic foam. The reinforcement layer (6) is fixed by splicing steel plates.

5. The waterproof structure for a dark tunnel according to claim 2, characterized in that: The lining layer (202) is formed by splicing together a plurality of prefabricated concrete structures.

6. The waterproof structure for a dark tunnel according to claim 1, characterized in that: Waterstops (12) are provided at the left and right ends of the bottom of the reinforcement layer (6) and the lining layer (202), and the ends of the two waterstops (12) that are away from each other are in contact with the two coarse gravels (11).

7. The waterproof structure for a dark tunnel according to claim 2, characterized in that: Adjacent ends of the plurality of fixing nails (201) are all fixedly connected to a waterproof cap (13), and the plurality of fixing nails (201) and the waterproof cap (13) are all cast inside the lining layer (202).

8. The waterproof structure for a dark tunnel according to claim 1, characterized in that: The two longitudinal drainage blind pipes (8) are both designed with an inclination angle, wherein the inclination angle is high in the middle and low on both sides.

Images