Tunnel drainage device and method

Abstract

The invention discloses a tunnel drainage device which comprises a side ditch and a main ditch and further comprises two first longitudinal blind pipes, two second longitudinal blind pipes and a drainage pipe, the two first longitudinal blind pipes are arranged on the two sides of a tunnel respectively, and the two first longitudinal blind pipes are arranged between a tunnel primary support and a tunnel secondary molded lining; the multiple longitudinal blind pipe outlets are formed in the first longitudinal blind pipe in the extending direction of the tunnel at intervals, and the longitudinal blind pipe outlets communicate with the side ditches; and the transverse drainage blind pipes are arranged at intervals in the extending direction of the tunnel, one ends of the transverse drainage blind pipes communicate with the side ditches, and the other ends of the transverse drainage blind pipes communicate with the main ditches. Underground water permeating into the back of a tunnel secondary molded lining in a tunnel primary support is collected through the first longitudinal blind pipe, a drainage network is formed through the multiple longitudinal blind pipe outlets, the side ditches, the multiple transverse drainage blind pipes and the main ditch, and even if the main ditch is blocked at a certain position, water can bypass to other channels through grids to be drained; and the reliability and the fault-tolerant capability of the system are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel drainage, in particular to a tunnel drainage device and method. BACKGROUND

[0002] Tunnel drainage is an important project in tunnel engineering, and the design of the tunnel drainage device is crucial to ensure the stability of the tunnel structure, the safety of operation and the service life.

[0003] In the prior art, the tunnel drainage system often takes a single drainage ditch as the main branch, and the water flow in multiple drainage blind pipes is guided into the drainage ditch and discharged from the drainage ditch, which leads to the failure of the entire drainage system when blockage occurs at a certain place of the drainage ditch.

[0004] Therefore, it is necessary to provide a tunnel drainage device and method to establish a grid drainage system, which is an important technical problem to be solved. SUMMARY

[0005] The present application provides a tunnel drainage device and method, which aims to solve the problem that in the prior art, the tunnel drainage system often takes a single drainage ditch as the main branch, and the water flow in multiple drainage blind pipes is guided into the drainage ditch and discharged from the drainage ditch, which leads to the failure of the entire drainage system when blockage occurs at a certain place of the drainage ditch.

[0006] To achieve the above-mentioned purpose, the present application provides a tunnel drainage device, which comprises a side ditch and a main ditch, and further comprises: two first longitudinal blind pipes, which are arranged on both sides of the tunnel, and are arranged between the initial support of the tunnel and the secondary lining of the tunnel; a plurality of longitudinal blind pipe outlets, which are arranged at intervals along the extension direction of the tunnel, and are connected to the side ditch; a plurality of transverse drainage blind pipes, which are arranged at intervals along the extension direction of the tunnel, and are connected to the side ditch at one end and to the main ditch at the other end.

[0007] In some embodiments, the tunnel drainage device further comprises: a plurality of annular drainage blind pipes, which are arranged at intervals along the extension direction of the tunnel, and are arranged between the initial support of the tunnel and the secondary lining of the tunnel; a plurality of vertical drainage blind pipes, which are connected to the annular drainage blind pipes through a tee joint, and are connected to the main ditch; and a second longitudinal blind pipe, which is arranged below the main ditch.

[0008] In some embodiments, the tunnel drainage device further comprises: a drainage plate, which is arranged between the initial support of the tunnel and the secondary lining of the tunnel, and partially wraps the first longitudinal blind pipe; a waterproof plate, which is arranged on the drainage plate; and a waterstop, which is arranged on the waterproof plate.

[0009] In some embodiments, the first longitudinal blind pipe comprises: a male connector; a female connector, the female connector being used to mate with the male connector; a perforated bellows, the perforated bellows being arranged between the male connector and the female connector; and a coarse filter cartridge, the coarse filter cartridge being arranged between the male connector and the female connector and being located outside the perforated bellows.

[0010] In some embodiments, the first longitudinal blind pipe further comprises: a plurality of outer corrugations, the plurality of outer corrugations being arranged at intervals on an outer circumferential surface of the perforated bellows; a plurality of first inner corrugations, the plurality of first inner corrugations being arranged at intervals inside the coarse filter cartridge, and each of the outer corrugations being in abutment with a corresponding one of the first inner corrugations; and a water-permeable tapering hole, the water-permeable tapering hole being arranged between two adjacent ones of the first inner corrugations.

[0011] In some embodiments, the coarse filter cartridge further comprises: two sub-cylinders, the two sub-cylinders being connected to the perforated bellows.

[0012] In some embodiments, the first longitudinal blind pipe further comprises: a first connecting ring groove, the first connecting ring groove being arranged on each of the male connector and the female connector and being used to connect the perforated bellows; and a guide groove, the first connecting ring groove being provided with the guide groove.

[0013] In some embodiments, the male connector comprises: a socket; a plug, the plug being connected to the socket; a connecting portion, the connecting portion being connected to the plug; and a plug head, the connecting portion being connected to the plug head, and an abutment surface being formed between the plug head and the connecting portion.

[0014] In some embodiments, the female connector comprises: a plug cylinder; an inner nut, the inner nut being arranged inside the plug cylinder; and a plurality of elastic pieces, the plurality of elastic pieces being arranged at intervals in a circumferential direction on the inner nut.

[0015] Based on another purpose of the present application, the present application further provides a tunnel drainage method, the tunnel drainage method using the tunnel drainage device as described above, and the tunnel drainage method comprising the following steps: S1, collecting, by two first longitudinal blind pipes, underground water infiltrating behind a secondary lining of a tunnel primary support; S2, flowing, along a plurality of longitudinal blind pipe outlets, underground water collected in the first longitudinal blind pipes to side ditches; S3, collecting, by the side ditches, rainwater, cleaning water, and the like, and flowing, together with the underground water flowing into the longitudinal blind pipe outlets, to a main ditch along a transverse drainage blind pipe; and S4, collecting, by the main ditch, water from all sources, and draining the water to outside of the tunnel by relying on a slope.

[0016] This application proposes a tunnel drainage device, including side ditches and a main ditch, and further comprising: two first longitudinal blind pipes, which are respectively located on both sides of the tunnel and positioned between the initial support and the secondary formwork lining of the tunnel; multiple longitudinal blind pipe outlets, which are spaced apart along the tunnel extension direction and connect to the side ditches; and multiple transverse drainage blind pipes, which are spaced apart along the tunnel extension direction, with one end of each transverse drainage blind pipe connecting to the side ditches and the other end connecting to the main ditch. The first longitudinal blind pipes collect groundwater that seeps into the secondary formwork lining of the tunnel from the initial support. A drainage network is formed through the multiple longitudinal blind pipe outlets, the side ditches, the multiple transverse drainage blind pipes, and the main ditch. Even if the side ditches or the main ditch become congested at some point, the water can be routed through the network to other channels for discharge, greatly improving the system's reliability and fault tolerance. Furthermore, the horizontal drainage blind pipes can also be used to absorb underground seepage water and cleaning water or rainwater seeping into the foundation slab, and finally discharge it through the main ditch to avoid water accumulation on the foundation slab. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a plan view of a tunnel drainage device according to an embodiment of this application; Figure 2 for Figure 1 Detailed diagram of node A in the middle; Figure 3 for Figure 1 Detailed diagram of node B in the middle; Figure 4 This is a three-dimensional structural diagram of the first longitudinal blind tube in one embodiment of this application; Figure 5 This is a front view of the first longitudinal blind tube in one embodiment of this application; Figure 6 for Figure 5 Sectional view at CC; Figure 7 for Figure 6 A magnified view of a section in part D; Figure 8 for Figure 6 A magnified view of a section in part E; Figure 9 for Figure 6 A magnified view of part F in the middle.

[0018] Fig. The tunnel initial support 1, the main ditch 2, the tunnel secondary mold lining 3, the cable trough 5, the side ditch 6, the transverse drainage blind pipe 7, the second longitudinal blind pipe 8, the vertical drainage blind pipe 10, the annular drainage blind pipe 11, the middle buried self-adhesive water stop belt 13, the longitudinal blind pipe outlet 14, the drainage plate 15, the first longitudinal blind pipe 16, the rivet 17, the drainage body 18, the waterproof board 19, the female plug connector 20, the elastic sheet 201, the plug cylinder 202, the inner nut 203, the limiting table 204, the sealing camber 205, the male plug connector 21, the socket 211, the plug table 212, the plug 213, the connecting part 214, the coarse filter cylinder 22, the water-permeable conical hole 23, the perforated corrugated pipe 24, the first inner corrugation 26, the outer corrugation 27, the insertion head 28, the second connecting ring groove 29, the first connecting ring groove 30, the guide groove 31. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Embodiment one Referring to Figure 1 , Figure 2 and Figure 3 , the tunnel drainage device of the present application comprises a side ditch 6 and a main ditch 2, and further comprises: two first longitudinal blind pipes 16, the two first longitudinal blind pipes 16 are arranged on the two sides of the tunnel, and the two first longitudinal blind pipes 16 are arranged between the tunnel initial support 1 and the tunnel secondary mold lining 3; a plurality of longitudinal blind pipe outlets 14, the first longitudinal blind pipe 16 is provided with a plurality of longitudinal blind pipe outlets 14 in the extension direction of the tunnel, and the longitudinal blind pipe outlet 14 is connected with the side ditch 6; and a plurality of transverse drainage blind pipes 7, the plurality of transverse drainage blind pipes 7 are arranged in the extension direction of the tunnel, one end of the transverse drainage blind pipe 7 is connected with the side ditch 6, and the other end of the transverse drainage blind pipe 7 is connected with the main ditch 2.

[0021] The side ditch 6 and the main ditch 2 are both arranged on the secondary mold lining, the side ditch 6 and the main ditch 2 are both arranged along the designed slope of the tunnel, and the local drainage slope is ensured to be not less than 0.3%, so that water can be directly drained out of the tunnel along the main ditch 2 or the side ditch 6, and the tunnel drainage work is completed.

[0022] The pipe diameter of the two first longitudinal blind pipes 16 is 100 mm, the first longitudinal blind pipes 16 are used to collect the underground water seeping behind the tunnel secondary formwork lining 3 from the tunnel primary support 1, the longitudinal blind pipe outlets 14 are used to connect the first longitudinal blind pipes 16 and the side ditch 6, the interval between the adjacent two longitudinal blind pipe outlets 14 is 12 m. The arrangement of the plurality of longitudinal blind pipe outlets 14 can effectively enhance the redundancy of the structure, even if the side ditch 6 is blocked at some place, the water in the first longitudinal blind pipe 16 can be discharged into the side ditch 6 from the next longitudinal blind pipe outlet 14, avoiding the blocked section. The longitudinal blind pipe outlet 14 is also provided with a slope of not less than 2%, which effectively guides the water into the side ditch 6.

[0023] In the embodiment, the cable trough 5 is arranged on both sides of the side ditch 6, the cable trough 5 is used to accommodate the line structure required by the tunnel, the cable trough 5 is connected to the side ditch 6 through the hard pvc pipe, which effectively discharges water into the side ditch 6, avoids the long-term immersion of the cable trough 5 in rainwater, cleaning water and the like, and the arrangement interval of the hard pvc pipe is 4 m.

[0024] The pipe diameter of the transverse drainage blind pipe 7 is 100 mm, the interval between the adjacent two transverse drainage blind pipes 7 is 12 m, the transverse drainage blind pipe 7 can guide the water in the side ditch 6 into the main ditch 2 located at the center, so that the water can quickly flow out of the main ditch 2, the arrangement of the plurality of transverse drainage blind pipes 7 can effectively enhance the redundancy of the structure, even if the main ditch 2 is blocked at some place, the water in the side ditch 6 can be discharged into the side ditch 6 from the next longitudinal blind pipe outlet 14, avoiding the blocked section. And the transverse drainage blind pipe 7 can also be used to absorb the underground seepage water and the cleaning water or rainwater seeping from the bottom plate, and finally discharged through the main ditch 2, so as to avoid the occurrence of the bottom plate waterlogging.

[0025] Specifically, the underground water seeping behind the tunnel secondary formwork lining 3 from the tunnel primary support 1 is collected through the first longitudinal blind pipe 16, and the drainage network is formed through the plurality of longitudinal blind pipe outlets 14, the side ditch 6, the plurality of transverse drainage blind pipes 7 and the main ditch 2, even if the side ditch 6 or the main ditch 2 is blocked at some place, the water can bypass to other channels, greatly improving the reliability and fault tolerance of the system. And the transverse drainage blind pipe 7 can also be used to absorb the underground seepage water and the cleaning water or rainwater seeping from the bottom plate, and finally discharged through the main ditch 2, so as to avoid the occurrence of the bottom plate waterlogging.

[0026] Referring to Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, further comprising: a plurality of annular drainage blind pipes 11, the plurality of annular drainage blind pipes 11 are arranged at intervals along the tunnel extension direction, the annular drainage blind pipes 11 are arranged between the tunnel primary support 1 and the tunnel secondary formwork lining 3, for collecting groundwater in the tunnel arch; and are communicated with the vertical drainage blind pipe 10 through a tee joint, and finally flow into the central main ditch 2; the pipe diameter of the annular drainage blind pipe 11 is 80 mm, the distance between adjacent two annular drainage blind pipes 11 is 12 m, the annular drainage blind pipe 11 has the same effect as the first longitudinal blind pipe 16, for collecting groundwater seeping from the tunnel primary support 1 behind the tunnel secondary formwork lining 3. The plurality of vertical drainage blind pipes 10, the vertical drainage blind pipe 10 is communicated with the annular drainage blind pipe 11 through a tee joint, and the vertical drainage blind pipe 10 is communicated with the main ditch 2; the water collected by the annular drainage blind pipe 11 flows into the central main ditch 2 from the vertical drainage blind pipe 10, and is discharged from the main ditch 2. Through the structural design of the plurality of annular drainage blind pipes 11 and the vertical drainage blind pipe 10, a new groundwater discharge path is established, the gridization of the drainage system is strengthened, and the reliability and fault tolerance of the drainage system are further improved. The second longitudinal blind pipe 8 is located below the main ditch 2. The second longitudinal blind pipe 8 is used to absorb water seeping from the main ditch 2, so as to avoid the water seeping out of the wall and the bottom of the main ditch 2 in disorder, thereby protecting the foundation of the main ditch 2 and the lower structure of the tunnel. The second longitudinal blind pipe 8 is finally discharged through a drainage pipe.

[0027] More specifically, by adopting the above structural design, not only can the drainage range be expanded from both sides of the tunnel to the entire lining annulus, but also the vertical pipe provides the shortest direct main ditch path for the arch seepage water. It can be understood that, equivalent to increasing the three-dimensional drainage dimension on the basis of the original plane grid, the collection efficiency of the groundwater is enhanced, and the gridization degree and reliability of the entire drainage system are further improved. In addition, considering that the main ditch 2 itself may also have a small amount of leakage, the second longitudinal blind pipe 8 is arranged directly below the main ditch 2. The second longitudinal blind pipe 8 can actively collect and discharge the water seeping from the main ditch 2, thereby avoiding the long-term erosion of the water flow to the main ditch foundation and the lower structure of the tunnel, playing a double insurance role, and ensuring the durability of the overall structure of the tunnel.

[0028] Referring to Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, it further includes: a drainage board 15, which is installed between the initial tunnel support 1 and the secondary tunnel lining 3. The drainage board 15 partially wraps around the first longitudinal blind pipe 16. The drainage board 15 is fixed to the initial tunnel support 1 by rivets 17. The drainage board 15 is partially bent to form a wrapping part that wraps around the first longitudinal blind pipe 16. The end of the drainage board 15 adjacent to the first longitudinal blind pipe 16 is connected to the initial tunnel support 1 by rivets 17. C15 sand-free concrete is poured into the first longitudinal blind pipe 16 to form a drainage body 18 that fixes the first longitudinal blind pipe 16. The drainage board 15 is in the shape of a ring strip. Multiple drainage boards 15 are provided. Multiple drainage boards 15 are spaced apart along the extension direction of the tunnel. The interval between two adjacent drainage boards 15 is 12m. The drainage board 15 is used to divert the groundwater that seeps into the back of the secondary tunnel lining 3 from the initial tunnel support 1 to the first longitudinal blind pipe 16, so that the groundwater that seeps into the back of the secondary tunnel lining 3 from the initial tunnel support 1 accumulates in the first longitudinal blind pipe 16. A waterproof membrane 19 is installed on top of the drainage membrane 15. The waterproof membrane 19 is a reverse-adhesive type and is used to prevent groundwater from seeping into the secondary formwork lining 3 of the tunnel. A waterstop is installed on the waterproof membrane 19. The waterstop is a back-adhesive self-adhesive rubber waterstop. The waterstop is also used to prevent groundwater from seeping into the secondary formwork lining 3 of the tunnel.

[0029] In this embodiment, a self-adhesive waterstop 13 is also provided in the secondary formwork lining 3 of the tunnel to ensure that groundwater cannot penetrate the secondary formwork lining and to protect the power structure installed on the secondary formwork lining.

[0030] See Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the first longitudinal blind tube 16 includes: a male connector 21; a female connector 20 for mating with the male connector 21; a perforated corrugated pipe 24 disposed between the male connector 21 and the female connector 20; and a coarse filter cylinder 22 disposed between the male connector 21 and the female connector 20, located outside the perforated corrugated pipe 24. The first longitudinal blind tube 16 is formed by connecting multiple separate intermediate pipes end to end. The intermediate pipes include the female connector 20, the male connector 21, the perforated corrugated pipe 24, and the coarse filter cylinder 22. The female connector 20 and the male connector 21 are used to form a quick connection between two adjacent intermediate pipes. The coarse filter cartridge 22 is used for preliminary filtration of groundwater, and the perforated corrugated pipe 24 is used for further filtration. Through this graded filtration method, sediment in the groundwater can be effectively filtered out, preventing sediment from accumulating in the first longitudinal blind pipe 16 and causing blockage. Furthermore, the graded filtration method can effectively prevent the permeable holes on the perforated corrugated pipe 24 from being blocked, thus significantly improving the structural reliability of the first longitudinal blind pipe 16.

[0031] It can be understood that the composite pipe body structure formed by the coarse filter cartridge 22 and the intermediate pipe can effectively improve the ring stiffness of the first longitudinal blind pipe 16, which is conducive to the first longitudinal blind pipe 16 to resist external radial pressure, such as backfill soil, cast concrete, and surrounding rock pressure, so that the first longitudinal blind pipe 16 can maintain its original shape without being flattened. Once the first longitudinal blind pipe 16 is flattened, its filtering structure will be damaged, and its water passage area will be reduced, which can easily induce clogging and affect the reliability of the first longitudinal blind pipe 16. The structure of the composite pipe body can also improve the impact resistance and toughness of the first longitudinal blind pipe 16, so that it can withstand impacts such as vibration and stepping during construction. The male connector 21 and the female connector 20 are made of PVC, and the spaced male connectors 21 and female connectors 20 can also effectively enhance the overall ring stiffness of the first longitudinal blind pipe 16, which is conducive to the first longitudinal blind pipe 16 to maintain its original shape without being flattened.

[0032] In addition, the spliced structure design can greatly reduce the length of the intermediate pipe of the standard segment, and the short length of the intermediate pipe (usually 2 meters per segment) is easier to transport and carry in a tunnel with limited space than a tens of meters long integral first longitudinal blind pipe 16, reducing the risk of damage. The standardized male connector 21 and female connector 20 make installation faster and more standardized, reducing problems such as loose connection and water leakage caused by improper operation of workers, improving the reliability of the final formed integral blind pipe, and being conducive to improving the construction efficiency.

[0033] The first longitudinal blind pipe 16 needs to be connected to a longitudinal blind pipe outlet 14 every 12 m, and a male connector and a female connector of the intermediate pipe are installed on the tee, two interfaces of the tee are connected with adjacent two intermediate pipes, and the other interface of the tee is connected with the longitudinal blind pipe outlet 14, so that the communication between the water passage space inside the first longitudinal blind pipe 16 and the longitudinal blind pipe outlet 14 can be quickly formed, the water in the first longitudinal blind pipe 16 can flow to the side ditch 6 quickly and reliably, and the reliability of drainage through the longitudinal blind pipe outlet 14 is greatly improved.

[0034] Referring to Figure 4 , Figure 5 , Figure 6 and Figure 7As shown in some embodiments, the first longitudinal blind pipe 16 further comprises: a plurality of outer corrugations 27, the plurality of outer corrugations 27 are arranged on the outer circumferential surface of the perforated corrugated pipe 24; the plurality of outer corrugations 27 can effectively improve the ring stiffness of the perforated corrugated pipe 24; a plurality of first inner corrugations 26, the plurality of first inner corrugations 26 are arranged on the inner surface of the coarse filter cylinder 22, and the outer corrugation 27 corresponds to the first inner corrugation 26; the first inner corrugation 26 can also effectively improve the stiffness of the coarse filter cylinder 22; the coarse filter cylinder 22 is preferably made of PVC material; the inner surface of the perforated corrugated pipe 24 is further provided with a plurality of second inner corrugations; through the structural design of the first inner corrugation 26, the second inner corrugation and the outer corrugation 27, the ring stiffness of the composite pipe body as a whole is effectively improved, which is beneficial to the resistance of the first longitudinal blind pipe 16 to external radial pressure. And the outer corrugation 27 corresponds to the first inner corrugation 26, so that the adjacent two outer corrugations 27, the corresponding first inner corrugation 26, the coarse filter cylinder 22 and the perforated corrugated pipe 24 form a ring-shaped sedimentation space, and the above-mentioned sedimentation space is used for effectively depositing and accumulating silt. Under the premise of ensuring that the ring stiffness of the composite pipe body as a whole meets the design value, a plurality of sedimentation spaces for depositing and accumulating silt are formed, which greatly prolongs the time required for the perforated corrugated pipe 24 to be blocked. The water permeable cone hole 23 is arranged between the adjacent two first inner corrugations 26. The water permeable cone hole 23 communicates with the sedimentation space, and the underground water enters the sedimentation space from the water permeable cone hole 23.

[0035] In the present embodiment, the inner diameter of the water permeable cone hole 23 gradually increases in the direction away from the perforated corrugated pipe 24. The larger opening on the outside provides a larger inlet for underground water, reduces the resistance of water flow into the hole, and can collect underground water behind the tunnel secondary formwork lining 3 faster.

[0036] Referring to Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in some embodiments, the coarse filter cylinder 22 further comprises: two split cylinder bodies, the two split cylinder bodies are connected to the perforated corrugated pipe 24. The two split cylinder bodies are connected to the perforated corrugated pipe 24 by means of adhesion. Specifically, the first inner corrugation 26 on the split cylinder body is coated with adhesive, and the two split cylinder bodies are buckled to the outer circumferential surface of the perforated corrugated pipe 24. After the adhesive solidifies, effective connection between the split cylinder body and the perforated corrugated pipe 24 is formed, and it is beneficial to ensure that the outer corrugation 27 corresponds to the first inner corrugation 26. The connecting surfaces of the two split cylinder bodies are also provided with an adhesive, and the two split cylinder bodies are connected by the adhesive.

[0037] Referring to Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, in some embodiments, the first longitudinal blind pipe 16 further comprises: a first connecting ring groove 30, the first connecting ring groove 30 is arranged on the male plug 21 and the female plug 20 and is connected with the perforated bellows 24; the end of the perforated bellows 24 is inserted into the first connecting ring groove 30, thereby forming the connection of the perforated bellows 24 with the male plug 21 and the female plug 20, preferably, an adhesive is arranged in the first connecting ring groove 30, which is used to further enhance the connection strength of the perforated bellows 24 with the male plug 21 or the female plug 20. A guide groove 31 is arranged in the first connecting ring groove 30. The guide groove 31 is used to guide the end of the perforated bellows 24.

[0038] In the present embodiment, the second connecting ring groove 29 is arranged on the male plug 21 and the female plug 20, and the insertion head 28 is arranged at both ends of the split cylinder body, the insertion head 28 is used to be inserted into the second connecting ring groove 29, and the adhesive is arranged between the second connecting ring groove 29 and the insertion head 28.

[0039] It can be understood that, in the prefabrication process of the intermediate pipe, the two split cylinder bodies are first buckled to the outer circumferential surface of the perforated bellows 24 to form the connection of the split cylinder body with the perforated bellows 24, and then the end of the perforated bellows 24 and the insertion head 28 at both ends of the split cylinder body are inserted into the male plug 21 and the female plug 20 correspondingly to form the intermediate pipe, so that any two structures of the intermediate pipe are directly connected, the structural rigidity of the whole intermediate pipe is improved, and the intermediate pipe is beneficial to resist external pressure.

[0040] Referring to Figure 4 , Figure 5 , Figure 6 and Figure 9As shown, in some embodiments, the male connector 21 comprises: a socket 211; a plug base 212 connected to the socket 211; the plug base 212 is integrally formed with the socket 211, the outer diameter of the plug base 212 is smaller than that of the socket 211; a connecting portion 214 connected to the plug base 212; the connecting portion 214 is integrally formed with the plug base 212, the outer diameter of the connecting portion 214 is smaller than that of the plug base 212; a plug 213 connected to the connecting portion 214; an abutting surface is formed between the plug 213 and the connecting portion 214. The plug 213 is integrally formed with the connecting portion 214; the socket 211, the plug base 212, the connecting portion 214 and the plug 213 are provided with through holes for water flow; the female connector 20 comprises: a plug barrel 202; an inner nut 203 arranged in the plug barrel 202; the inner nut 203 is screwed to the plug barrel 202; the plug barrel 202 is provided with a limiting platform 204 for limiting the screwing depth of the inner nut 203; a plurality of elastic sheets 201 are arranged on the inner nut 203 in a ring shape; the plurality of elastic sheets 201 are integrally formed with the inner nut 203; there is a gap between the elastic sheet 201 and the inner wall of the inner nut 203; there is also a gap between the adjacent two elastic sheets 201 to provide a deformation space for the elastic sheet 201; during the insertion of the male connector 21, the plug 213 forces the plurality of elastic sheets 201 to deform; when the plug 213 passes through the elastic sheet 201, the elastic sheet 201 will restore to its original shape under the action of its own elasticity, and the end of the elastic sheet 201 abuts against the abutting surface, forming the connection between the male connector 21 and the female connector 20; and when the plug 213 passes through the elastic sheet 201, the end surface of the socket 211 abuts against the end surface of the plug barrel 202.

[0041] In this embodiment, the plug barrel 202 is further provided with a sealing arc surface 205 matched with the plug 213; when the plug 213 passes through the elastic sheet 201, the sealing arc surface 205 abuts against the plug 213. Through the abutment of the sealing arc surface 205 and the plug 213, the sealing property of the plug 213 and the plug barrel 202 is improved, avoiding the external water flow from flowing into the plug barrel 202 through the gap between the plug base 212 and the plug barrel 202, and then flowing into the perforated corrugated pipe 24 through the gap between the plug 213 and the plug barrel 202. The water containing silt directly entering the perforated corrugated pipe 24 is effectively avoided, thereby reducing the probability of the perforated corrugated pipe 24 being clogged.

[0042] Embodiment two In this embodiment, the same parts as in embodiment one are given the same reference numerals, and the same textual description is omitted.

[0043] The embodiment discloses a tunnel drainage method, which uses the tunnel drainage device in the embodiment one, and comprises the following steps: S1, the first longitudinal blind pipe 16 on both sides collects underground water seeping behind the secondary formwork lining 3 of the tunnel primary support 1; S2, the underground water collected in the first longitudinal blind pipe 16 flows to the side ditch 6 along the multiple longitudinal blind pipe outlets 14; S3, the side ditch 6 collects rainwater, cleaning water and the like, and flows together with the underground water flowing into the longitudinal blind pipe outlet 14 along the horizontal drainage blind pipe 7 into the main ditch 2; S4, the main ditch 2 collects water from all sources, and relies on the slope to drain the water outside the tunnel. The side ditch 6 is also arranged along the slope of the tunnel design, and ensures that the local drainage slope is not less than 0.3%, so that the water can be directly drained out of the tunnel along the side ditch 6, and the tunnel drainage work is completed. The above drainage method collects the underground water seeping behind the secondary formwork lining 3 of the tunnel primary support 1 through the first longitudinal blind pipe 16, and forms a drainage network through the multiple longitudinal blind pipe outlets 14, the side ditch 6, the multiple horizontal drainage blind pipes 7 and the main ditch 2, so that even if the side ditch 6 or the main ditch 2 is congested at a certain place, the water can bypass to other channels through the grid to be drained out, and the reliability and fault tolerance of the system are greatly improved. Moreover, the horizontal drainage blind pipe 7 can also be used to absorb underground seepage water and cleaning water or rainwater seeping under the bottom plate, and finally drained out through the main ditch 2, so as to avoid the occurrence of the bottom plate waterlogging.

[0044] The above only describes some or preferred embodiments of the application, and neither the text nor the drawings can limit the scope of protection of the application, and any equivalent structural transformation using the content of the specification and drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the application.

Claims

1. A tunnel drainage device, comprising a side ditch (6) and a main ditch (2), characterized in that, Also includes: Two first longitudinal blind pipes (16) are respectively located on both sides of the tunnel. The two first longitudinal blind pipes (16) are located between the initial support (1) of the tunnel and the secondary formwork lining (3) of the tunnel. Multiple longitudinal blind pipe outlets (14), the first longitudinal blind pipe (16) is provided with multiple longitudinal blind pipe outlets (14) at intervals along the tunnel extension direction, and the longitudinal blind pipe outlets (14) are connected to the side ditch (6). Multiple transverse drainage blind pipes (7) are spaced apart along the tunnel extension direction. One end of each transverse drainage blind pipe (7) is connected to the side ditch (6), and the other end of each transverse drainage blind pipe (7) is connected to the main ditch (2).

2. The tunnel drainage device according to claim 1, characterized in that, Also includes: Multiple circumferential drainage blind pipes (11) are arranged at intervals along the tunnel extension direction. The circumferential drainage blind pipes (11) are arranged between the initial support (1) of the tunnel and the secondary cast-in-place lining (3) of the tunnel. Multiple vertical drainage blind pipes (10) are connected to the circumferential drainage blind pipe (11) via a tee, and the vertical drainage blind pipes (10) are connected to the main ditch (2). The second longitudinal blind pipe (8) is located below the main trench (2).

3. A tunnel drainage device according to claim 1, characterized in that, Also includes: Drainage board (15), the drainage board (15) is installed between the initial support (1) of the tunnel and the secondary cast-in-place lining (3) of the tunnel, the drainage board (15) partially wraps the first longitudinal blind pipe (16). Waterproof board (19), the waterproof board (19) is provided on the drainage board (15); Waterstop strip, the waterstop strip is provided on the waterproof board (19).

4. A tunnel drainage device according to claim 1, characterized in that, The first longitudinal blind tube (16) includes: Male connector (21); A female connector (20) is used to mate with the male connector (21); A perforated corrugated pipe (24) is provided between the male connector (21) and the female connector (20). The coarse filter cartridge (22) is disposed between the male connector (21) and the female connector (20), and the coarse filter cartridge (22) is located outside the perforated corrugated pipe (24).

5. A tunnel drainage device according to claim 4, characterized in that, The first longitudinal blind tube (16) further includes: Multiple outer corrugations (27) are provided at intervals on the outer peripheral surface of the perforated corrugated pipe (24). The first inner corrugation (26) is provided at intervals inside the coarse filter cylinder (22), and the outer corrugation (27) is correspondingly opposed to the first inner corrugation (26); A permeable cone hole (23) is provided between two adjacent first inner corrugations (26).

6. A tunnel drainage device according to claim 5, characterized in that, The coarse filter cartridge (22) also includes: Two cylindrical sections are connected to the perforated corrugated pipe (24).

7. A tunnel drainage device according to claim 4, characterized in that, The first longitudinal blind tube (16) further includes: The first connecting ring groove (30) is provided on both the male connector (21) and the female connector (20) to connect the perforated corrugated pipe (24). Guide groove (31), the first connecting ring groove (30) is provided with guide groove (31).

8. A tunnel drainage device according to claim 4, characterized in that, The male connector (21) includes: Socket (211); A socket (212) is connected to the socket (211). Connecting part (214), the connecting part (214) is connected to the insertion station (212); The plug (213) is connected to the connector (214), and an abutting surface is formed between the plug (213) and the connector (214).

9. A tunnel drainage device according to claim 4, characterized in that, The female connector (20) includes: Insert (202); Inner nut (203), the inner nut (203) is provided inside the insert (202); Multiple spring pieces (201) are provided on the inner nut (203) at intervals along the circumferential direction.

10. A tunnel drainage method, wherein the tunnel drainage method uses the tunnel drainage device according to any one of claims 1-9, characterized in that, The drainage method includes the following steps: S1, the first longitudinal blind pipes on both sides collect groundwater that seeps into the tunnel's secondary cast-in-place lining from the initial support of the tunnel. S2. The groundwater collected in the first longitudinal blind pipe flows to the side ditch along the outlets of multiple longitudinal blind pipes. S3, the side ditch collects rainwater, washing water, etc., and merges with the groundwater flowing in from the longitudinal blind pipe outlet, and together they flow into the main ditch along the transverse drainage blind pipe; S4. The main ditch collects water from all sources and discharges the water outside the tunnel by relying on the slope.

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