A subway station drainage system

Abstract

The present invention provides a subway station drainage system, comprising a side arch wall drainage system and a base plate drainage system. The side arch wall drainage system comprises a buffer layer disposed at the side wall and arch wall, and a waterproof plate disposed on the backwater side of the buffer layer. A plurality of annular permeable blind pipes and a plurality of annular drainage strips are longitudinally spaced apart between the buffer layer and the waterproof plate. A longitudinal side wall drainage blind pipe is disposed at the bottom of the side wall and is connected to the outlet ends of the plurality of annular permeable blind pipes and the plurality of annular drainage strips. A plurality of transverse water guide pipes are longitudinally spaced apart on the longitudinal side wall drainage blind pipe. The base plate drainage system comprises a plurality of longitudinal drainage blind pipes and a plurality of transverse drainage blind pipes disposed at the base plate and connected to each other. Drainage ditches are disposed on both sides of the base plate, and the outlet ends of the plurality of transverse water guide pipes and the plurality of transverse drainage blind pipes are respectively connected to the drainage ditches. The drainage system can ensure the safety of the main construction and subsequent operation of the station.

Description

Technical Field

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

[0002] One of the biggest challenges facing the main construction and subsequent operation of subway stations is the difficulty in ensuring the quality of waterproofing construction, which in turn hinders the effective resolution of water leakage issues. Currently, the most common waterproofing construction technique is full-package waterproofing, where the structure is enclosed in a fully enclosed flexible waterproof layer, or a fully enclosed flexible waterproof layer is sandwiched between the inner and outer linings of a composite lining. For example, in the case of underground arch-covered stations, waterproofing panels are used to completely seal the initial support and the main structure, preventing initial tunnel seepage from entering the panels. However, due to various factors, such as the lining process, the arch concrete generally cannot be fully filled, making it easy for water to form channels within the arch, allowing large amounts of groundwater to accumulate and not be promptly relieved. Furthermore, if the waterproof layer is damaged in any way, groundwater will become connected between the waterproof layer and the main structure, preventing the waterproof layer from effectively performing its intended purpose.

[0003] Here, the present invention is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a subway station drainage system that can effectively solve the problem of water leakage affecting the main construction and subsequent operation safety of the station.

[0005] The present invention provides a subway station drainage system, comprising a side arch wall drainage system and a bottom plate drainage system. The side arch wall drainage system comprises a buffer layer arranged at the side wall and the arch wall and a waterproof plate arranged at the back water side of the buffer layer. A plurality of annular permeable blind pipes and a plurality of annular drainage plate strips are arranged at intervals along the longitudinal direction between the buffer layer and the waterproof plate. A longitudinal side wall drainage blind pipe connected to the water outlet ends of the plurality of annular permeable blind pipes and the plurality of annular drainage plate strips is arranged at the bottom of the side wall. A plurality of transverse water guide pipes are arranged at intervals along the longitudinal direction on the longitudinal side wall drainage blind pipe. The bottom plate drainage system comprises a plurality of longitudinal drainage blind pipes and a plurality of transverse drainage blind pipes arranged at the bottom plate and connected to each other. Drainage side ditches are arranged at both sides of the bottom plate. The water outlet ends of the plurality of transverse water guide pipes and the plurality of transverse drainage blind pipes are respectively connected to the drainage side ditches.

[0006] Furthermore, a plastic gasket is provided on the backwater side of the buffer layer, the plastic gasket and the buffer layer are fixed to the initial support base surface by cement nails, and the waterproof board is welded and fixed to the plastic gasket.

[0007] Furthermore, an external waterstop is provided at the end of the waterproof board, and the external waterstop is fixed to the end of the waterproof board by sticking with a cold self-adhesive waterproof membrane.

[0008] Furthermore, a blind ditch filter layer is provided at the bottom of the side wall, and the longitudinal side wall drainage blind pipe is provided inside the blind ditch filter layer.

[0009] Furthermore, a plurality of openings with an aperture of not less than 10 mm are arranged at intervals in the upper half of the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe, and non-woven fabric is wrapped around the outside of the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe.

[0010] Furthermore, a water filtering layer is provided at the bottom plate position, and a plurality of longitudinal drainage blind pipes and a plurality of transverse drainage blind pipes are provided in the water filtering layer.

[0011] Furthermore, a plurality of longitudinal drainage blind pipes are evenly arranged in the transverse direction at the bottom plate position, and a plurality of transverse drainage blind pipes are arranged in the longitudinal direction at intervals of 8-12 m at the bottom plate position.

[0012] Furthermore, a plurality of pre-buried grouting pipes are arranged at intervals on the side walls and the arch walls.

[0013] Furthermore, collection pits are set at both ends of the station, and the outlet ends of the drainage ditches are connected to the collection pits.

[0014] Furthermore, the annular permeable blind pipe adopts a soft spring permeable pipe, the annular drainage strip adopts a concave-convex drainage strip, the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe adopt double-wall corrugated pipe, and the transverse water pipe adopts a PVC pipe.

[0015] The subway station drainage system of the present invention is provided with waterproof panels on the parts of the station main structure except the bottom plate, and longitudinal drainage blind pipes and transverse drainage blind pipes are provided at the bottom plate position, and circumferential permeable blind pipes, circumferential drainage plate strips, longitudinal side wall drainage blind pipes and transverse water guide pipes are provided at the side walls and arch positions, so that water can be discharged into the drainage ditches on both sides in a timely manner, and then discharged into the sump at both ends of the station, and finally centrally pumped out; in addition, by pre-buried grouting pipes in the structure, grouting and plugging can be carried out at any time, establishing multiple lines of defense, thereby effectively solving the problem of water leakage affecting the construction of the station main body and the safety of subsequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a subway station drainage system according to one embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a side arch wall drainage system according to one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the connection structure of the annular permeable blind pipe, the longitudinal side wall drainage blind pipe and the transverse water pipe according to one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the connection structure of the annular drainage strip, the longitudinal side wall drainage blind pipe and the transverse water pipe according to one embodiment of the present invention;

[0021] Figure 5 It is an enlarged structural schematic diagram of a drainage ditch according to one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the connection structure between the annular permeable blind pipe and the longitudinal side wall drainage blind pipe according to one embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of a waterproof board fixing structure according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the waterproof layer end structure according to one embodiment of the present invention;

[0025] Figure 9 This is a schematic structural diagram of a bottom plate drainage system according to one embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the connection structure of the longitudinal drainage blind pipe and the transverse drainage blind pipe according to one embodiment of the present invention;

[0027] Figure 11 It is a structural schematic diagram of a longitudinal side wall drainage blind pipe, a longitudinal drainage blind pipe or a transverse drainage blind pipe according to one embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1: Side wall; 2: Arch wall; 3: Buffer layer; 4: Annular permeable blind pipe; 5: Annular drainage board strip; 6: Horizontal water guide pipe; 7: Blind ditch filter layer; 8: Longitudinal side wall drainage blind pipe; 9: Longitudinal drainage blind pipe; 10: Horizontal drainage blind pipe; 11: Non-woven fabric; 12: Cushion layer; 13: Drainage ditch; 14: Multi-channel device; 15: Waterproof board; 16: External waterstop; 17: Cold self-adhesive waterproof membrane; 18: Initial support; 19: Filter layer; 20: Pre-buried grouting pipe; 21: Cement nail; 22: Plastic gasket. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular also includes the plural. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all 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.

[0033] Example 1

[0034] Combine Figures 1 to 11 As shown, the subway station drainage system of this embodiment includes a side arch wall drainage system and a bottom plate drainage system. The side arch wall drainage system includes a buffer layer 3 arranged at the side wall 1 and the arch wall 2 and a waterproof board 15 arranged on the back water side of the buffer layer 3. A plurality of annular permeable blind pipes 4 and a plurality of annular drainage board strips 5 are arranged at intervals along the longitudinal direction between the buffer layer 3 and the waterproof board 15. A longitudinal side wall drainage blind pipe 8 connected to the water outlet ends of the plurality of annular permeable blind pipes 4 and the plurality of annular drainage board strips 5 is arranged at the bottom position of the side wall 1. A plurality of transverse water guide pipes 6 are arranged at intervals along the longitudinal direction on the longitudinal side wall drainage blind pipe 8. The bottom plate drainage system includes a plurality of longitudinal drainage blind pipes 9 and a plurality of transverse drainage blind pipes 10 arranged at the bottom plate and connected to each other. Drainage ditches 13 are arranged at both sides of the bottom plate. The water outlet ends of the plurality of transverse water guide pipes 6 and the plurality of transverse drainage blind pipes 10 are respectively connected to the drainage ditches 13.

[0035] The above-mentioned subway station drainage and waterproofing system is intended to solve the problem of water leakage and flow in the primary support structure after the construction of the secondary lining structure is completed. It mainly uses a subway station drainage and waterproofing system based on semi-enclosed waterproofing and limited drainage. Circumferential permeable blind pipes 4, longitudinal side wall drainage blind pipes 8 and transverse water guide pipes 6 are set at the side walls 1 and arch walls 2. Waterproof boards 15 are used on the main structure of the station except for the bottom plate, and longitudinal drainage blind pipes 9 and transverse drainage blind pipes 10 are set at the bottom plate to discharge water into the drainage ditches 13 on both sides in a timely manner, and then discharged into the sump at both ends of the station, and finally centralized pumping and drainage.

[0036] In the subway station drainage system of this embodiment, the side arch wall drainage system mainly includes a buffer layer 3, an annular permeable blind pipe 4, an annular drainage board belt 5, a transverse water guide pipe 6, a blind ditch filter layer 7, a longitudinal side wall drainage blind pipe 8, a waterproof board 15, a pre-buried grouting pipe 20 and other components.

[0037] After the initial support 18 of the station is completed, the base surface of the side wall 1 and the arch wall 2 is treated. The waterproof layer of the side wall 1 and the arch wall 2 is installed 500mm above the drainage ditch 13. The waterproof layer includes a buffer layer 3 and a waterproof board 15 installed on the side of the buffer layer 3 facing away from the water. There are no strict restrictions on the material of the buffer layer 3, for example, non-woven fabric can be used; at the same time, there are no strict restrictions on the fixing method of the waterproof board 15, such as Figure 7 As shown, for example, a plastic gasket 22 can be set on the back side of the buffer layer 3, and the plastic gasket 22 and the buffer layer 3 can be fixed to the base surface of the initial support 18 by cement nails 21. At this time, the waterproof board 15 can be welded and fixed on the plastic gasket 22. In addition, as Figure 8 As shown, an external waterstop 16 can be provided at the end of the waterproof board 15 , and the external waterstop 16 can be fixed to the end of the waterproof board 15 by sticking with a self-adhesive waterproof membrane 17 .

[0038] When setting the annular permeable blind pipe 4, the annular drainage strip 5 and the transverse water pipe 6, there is no strict restriction on their specific setting method, and they can be reasonably set according to actual needs. Figure 2 As shown, for example, an annular permeable blind pipe 4, an annular drainage board strip 5 and a transverse water guide pipe 6 can be arranged at intervals of 4-6 m along the longitudinal direction between the buffer layer 3 and the waterproof board 15; at the same time, they can be arranged in sequence in a manner of setting an annular drainage board strip 5 after every two annular permeable blind pipes 4, and the transverse water guide pipe 6 can be arranged at appropriate positions of the longitudinal side wall drainage blind pipe 8 at intervals.

[0039] like Figure 3 As shown, the annular permeable blind pipe 4, the transverse water pipe 6 and the longitudinal side wall drainage blind pipe 8 can be connected through a multi-way device 14 (such as a tee pipe, etc.); Figure 4 As shown, the longitudinal side wall drainage blind pipe 8 and the annular permeable blind pipe 4 can be connected through a multi-way device 14 (such as a tee pipe, etc.); Figure 6 As shown, a groove can be made on the longitudinal side wall drainage blind pipe 8, and the annular drainage strip 5 can be inserted into the groove of the longitudinal side wall drainage blind pipe 8, so that the water outlet end of the annular drainage strip 5 is connected to the longitudinal side wall drainage blind pipe 8. It can be understood that when the water volume is large, the annular permeable blind pipe 4 and the annular drainage strip 5 can be arranged more densely.

[0040] There is no strict restriction on the arrangement of the longitudinal side wall drainage blind pipe 8; Figure 5As shown, in one embodiment, a blind ditch filter layer 7 can be provided at the bottom of the side wall 1 , and the longitudinal side wall drainage blind pipe 8 can be provided inside the blind ditch filter layer 7 .

[0041] In the side arch wall drainage system of this embodiment, it can be understood that the annular permeable blind pipe 4 and the annular drainage strip 5 respectively have two water outlet ends. At this time, two longitudinal side wall drainage blind pipes 8 are respectively arranged on the left and right sides of the bottom position of the side wall 1. One water outlet end of the annular permeable blind pipe 4 and the annular drainage strip 5 is connected to the longitudinal side wall drainage blind pipe 8 on the left, and the other water outlet end of the annular permeable blind pipe 4 and the annular drainage strip 5 is connected to the longitudinal side wall drainage blind pipe 8 on the right.

[0042] In the subway station drainage system of this embodiment, the bottom plate drainage system mainly includes components such as the longitudinal drainage blind pipe 9, the transverse drainage blind pipe 10, and the drainage ditch 13.

[0043] There is no strict restriction on the specific structure of the longitudinal side wall drainage blind pipe 8, the longitudinal drainage blind pipe 9 and the transverse drainage blind pipe 10, and they can be reasonably set according to actual needs. Figure 11 As shown, a plurality of openings with an aperture of not less than 10 mm can be provided at intervals in the upper half of the longitudinal side wall drainage blind pipe 8, the longitudinal drainage blind pipe 9 and the transverse drainage blind pipe 10, and a non-woven fabric 11 can be provided on the outside of the longitudinal side wall drainage blind pipe 8, the longitudinal drainage blind pipe 9 and the transverse drainage blind pipe 10 to prevent clogging and filter sand and gravel.

[0044] In addition, if Figure 9 As shown, a water filter layer 19 can be set at the bottom plate position, and the longitudinal drainage blind pipes 9 and the transverse drainage blind pipes 10 can be set in the water filter layer 19. There is no strict restriction on the arrangement of the longitudinal drainage blind pipes 9 and the transverse drainage blind pipes 10; specifically, multiple longitudinal drainage blind pipes 9 can be evenly arranged along the transverse direction at the bottom plate position, and multiple transverse drainage blind pipes 10 can be set at intervals of 8-12m along the longitudinal direction at the bottom plate position. Figure 10 As shown, a plurality of longitudinal drainage blind pipes 9 and a plurality of transverse drainage blind pipes 10 can be connected and communicated through a multi-way device 14 (such as a four-way pipe, etc.).

[0045] In particular, Figure 1 As shown, multiple pre-buried grouting pipes 20 can be set at intervals on the side wall 1 and the arch wall 2 so that grouting can be carried out at any time to plug leaks. In addition, sump pits are set at both ends of the station, and the outlet ends of the drainage ditches 13 are connected to the sump pits. The water in the drainage ditches 13 is discharged into the sump pits at both ends of the station and finally pumped out centrally. By establishing multiple lines of defense in the above manner, it is possible to effectively solve the problem of water leakage affecting the main construction of the station and the safety of subsequent operations.

[0046] The construction method of the subway station drainage system of this embodiment is as follows:

[0047] After the initial support 18 of the station is completed, the base surface of the side wall 1 and the arch wall 2 is treated. The waterproof layer (including the buffer layer 3 and the waterproof board 15) of the side wall 1 and the arch wall 2 is installed starting from the side wall 1 position 500mm above the drainage ditch 13. First, the buffer layer 3 (such as non-woven fabric) is laid and fixed to the initial support 18 base surface that has met the requirements using cement nails 21 and plastic gaskets 22 (such as plastic circular gaskets). Annular permeable blind pipes 4 (such as Φ50 soft spring permeable pipes), annular drainage strips 5 (such as 1mm thick, 150mm wide, concave and convex drainage strips) and transverse water pipes 6 (such as DN50 PVC pipes) are installed every 5m on the buffer layer 3. When the water volume is large, the annular permeable blind pipes 4 and annular drainage strips 5 can be installed more frequently.

[0048] A blind ditch filter layer 7 is applied at the bottom of the side wall 1, and a longitudinal side wall drainage blind pipe 8 (e.g., DN100 double-wall corrugated pipe) is arranged in the filter layer. The upper half of the longitudinal side wall drainage blind pipe 8 is grooved or punched (with a hole diameter of not less than 10 mm) and wrapped with non-woven fabric 11 for protection, which plays a role in preventing blockage and filtering sand and gravel.

[0049] An annular permeable blind pipe 4 (e.g., a Φ50 soft spring permeable pipe), a transverse water conduit 6 (e.g., a DN50 PVC pipe), and a longitudinal side wall drainage blind pipe 8 (e.g., a DN100 double-wall corrugated pipe) are connected via a multi-way device 14 (e.g., a tee or a cross-way pipe). The longitudinal side wall drainage blind pipe 8 is grooved, and an annular drainage strip 5 (e.g., a 1mm thick, 150mm wide, concave-convex drainage strip) is inserted. Groundwater from the side wall 1 and arch wall 2 is drained into the longitudinal side wall drainage blind pipe 8 through the annular permeable blind pipe 4 and the annular drainage strip 5, and then discharged into the drainage ditches 13 on both sides through the transverse water conduit 6 (e.g., a DN50 PVC pipe). Finally, it is collectively discharged into the sump on both sides for centralized pumping.

[0050] After the initial support 18 of the station is completed, a drainage layer 19 is constructed at the station base. Three longitudinal drainage blind pipes 9 (e.g., DN100 double-wall corrugated pipes) are evenly and evenly spaced in the drainage layer 19. Transverse drainage blind pipes 10 (e.g., DN100 double-wall corrugated pipes) are arranged every 10 meters. The transverse drainage blind pipes 10 have a transverse slope of 1%. The upper halves of the longitudinal and transverse drainage blind pipes 9 and 10 are grooved or perforated (with a diameter of no less than 10 mm) and wrapped with non-woven fabric 11 for protection, preventing blockage and filtering sand and gravel. The longitudinal and transverse drainage blind pipes 9 and 10 are connected via a multi-way device 14. When pouring the concrete of the base slab cushion layer 12, the longitudinal and transverse drainage blind pipes 9 and 10 are securely fixed. Drainage ditches 13 are set on both sides of the station floor. The groundwater that may exist under the floor cushion 12 is drained into the drainage ditches 13 on both sides through the longitudinal drainage blind pipes 9 and the transverse drainage blind pipes 10, and finally discharged into the collection pits on both sides for centralized pumping.

[0051] After the construction of the annular permeable blind pipe 4 and the transverse water conduit 6 at the side wall 1 and the arch wall 2 is completed, the waterproof board 15 (for example, a 1.5 mm thick EVA waterproof board 15) is constructed, and the waterproof board 15 roll is heat-melted and welded to the plastic gasket 22 (for example, a plastic round gasket) using a hot air welding gun; at the starting position of laying the waterproof board 15 at the lower part of the side wall 1, the waterproof board 15 end is constructed, and the waterproof board 15 end is fixed with an external waterstop 16, which is pasted and fixed to the waterproof board 15 roll by a cold self-adhesive waterproof roll 17 (for example, a double-sided butyl rubber cold self-adhesive waterproof roll).

[0052] During the construction of the station side wall 1 and the arch wall 2, grouting pipes 20 (galvanized steel pipes with annular and longitudinal spacing of 4-5m) are pre-buried for subsequent grouting and leak plugging.

[0053] The subway station drainage system of this embodiment is provided with a waterproof plate 15 on the portion of the station main structure other than the floor, and is provided with a longitudinal drainage blind pipe 9 and a transverse drainage blind pipe 10 at the floor position. Annular permeable blind pipes 4, longitudinal side wall drainage blind pipes 8, and transverse water guide pipes 6 are provided at the side walls 1 and arch positions, so that water can be promptly discharged into drainage ditches 13 on both sides and then into sump pits at both ends of the station for centralized pumping. In addition, by pre-embedding grouting pipes 20 in the structure, grouting can be carried out at any time to plug leaks, establish multiple lines of defense, and effectively solve the problem of water leakage affecting the construction of the main station and the safety of subsequent operations.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A subway station drainage system, characterized in that: The system comprises a side arch wall drainage system and a bottom plate drainage system. The side arch wall drainage system comprises a buffer layer arranged at the side wall and the arch wall and a waterproof board arranged at the back water side of the buffer layer. A plurality of annular permeable blind pipes and a plurality of annular drainage board strips are arranged at intervals along the longitudinal direction between the buffer layer and the waterproof board. A longitudinal side wall drainage blind pipe connected to the water outlet ends of the plurality of annular permeable blind pipes and the plurality of annular drainage board strips is arranged at the bottom of the side wall. A plurality of transverse water guide pipes are arranged at intervals along the longitudinal direction on the longitudinal side wall drainage blind pipe. The bottom plate drainage system comprises a plurality of longitudinal drainage blind pipes and a plurality of transverse drainage blind pipes arranged at the bottom plate and connected to each other. Drainage side ditches are arranged at both sides of the bottom plate. The outlet ends of the transverse water guide pipes and multiple transverse drainage blind pipes are respectively connected to the drainage ditches, a blind ditch filtration layer is set at the bottom of the side wall, the longitudinal side wall drainage blind pipe is set inside the blind ditch filtration layer, and multiple openings with an aperture of not less than 10 mm are set at intervals in the upper half of the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe. Non-woven fabric is wrapped around the outside of the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe. The annular permeable blind pipe adopts a soft spring permeable pipe, the annular drainage plate belt adopts a concave-convex drainage plate belt, the longitudinal side wall drainage blind pipe, the longitudinal drainage blind pipe and the transverse drainage blind pipe adopt a double-wall corrugated pipe, and the transverse water guide pipe adopts a PVC pipe.

2. The subway station drainage system according to claim 1, characterized in that: A plastic gasket is set on the backwater side of the buffer layer, the plastic gasket and the buffer layer are fixed to the initial support base surface by cement nails, and the waterproof board is welded and fixed to the plastic gasket.

3. The subway station drainage system according to claim 1, characterized in that: An external waterstop is set at the end of the waterproof board, and the external waterstop is fixed to the end of the waterproof board by sticking with a cold self-adhesive waterproof membrane.

4. The subway station drainage system according to claim 1, characterized in that: A water filtering layer is arranged at the bottom plate position, and a plurality of longitudinal drainage blind pipes and a plurality of transverse drainage blind pipes are arranged in the water filtering layer.

5. The subway station drainage system according to claim 1, characterized in that: Multiple longitudinal drainage blind pipes are evenly arranged along the transverse direction at the bottom plate position, and multiple transverse drainage blind pipes are set at intervals of 8-12m along the longitudinal direction at the bottom plate position.

6. The subway station drainage system according to claim 1, characterized in that: Multiple embedded grouting pipes are arranged at intervals on the side walls and arch walls.

7. The subway station drainage system according to claim 1, characterized in that: Collection pits are set up at both ends of the station, and the outlet ends of the drainage ditches are connected to the collection pits.

Images