Underground anti-leakage layer structure of subway station and its anti-leakage control method

Abstract

The invention relates to the technical field of underground structural engineering of subway stations, and in particular to an underground anti-leakage layer structure of a subway station and an anti-leakage control method thereof, and solves the technical problem that the underground waterproofing engineering of subway stations in the prior art lacks an effective and reliable implementation structure combining rigidity and flexibility for waterproofing and anti-leakage. Specifically, one side of each bearing platform is connected to an anti-leakage protection layer, and adjacent anti-leakage protection layers are connected by a connecting layer; a drainage component is arranged at one end of the anti-leakage protection layer away from the water-facing side; the drainage component is connected to a threaded adjustment piece, and the threaded adjustment piece can penetrate the anti-leakage protection layer; a water stop plate can be prefabricated on the outer waterproof layer, and the side of the water stop plate away from the water-facing side is connected to an extended end of the threaded adjustment piece; the end of the threaded adjustment piece away from the water-facing side is connected to the drainage component, and the drainage component can be connected to a negative pressure wind system, and the negative pressure wind system can enable the drainage component to maintain a negative pressure in a fixed numerical range under working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of underground structural engineering of subway stations, and in particular to an underground anti-leakage layer structure of a subway station and an anti-leakage control method thereof. Background Art

[0002] With the acceleration of urbanization, building subways has become the first choice for major cities to solve traffic problems. As the most important part of the subway system, subway stations have complex construction procedures and often face multiple challenges and risks. Especially under the current trend, changes in the climate and environment have brought challenges to the construction and related safety of subway stations due to flood control in the rainy season. The construction of subway stations needs to be combined with underground projects, and even the planning will consider combining construction with existing underground passages, or building new underground passages. The construction location needs to consider the complexity of the construction environment. The connection between the subway station and the underground main passage is mainly considered to be leak-proof after completion. Most of the existing treatment measures are based on rigid waterproofing arrangements, which are difficult to effectively combine with flexible waterproof layers. The main reason is that the existing flexible waterproof materials require the construction of attachment points, which makes it difficult to combine with rigid waterproofing construction. The main disadvantage of rigid waterproofing is that it is extremely dependent on the ground. The quality environment is eroded by capillary water, gushing and seepage water, which is difficult to repair. Until water gushing occurs, the existing treatment method is almost to block and hollow out the fault location for construction treatment. However, for the connection between the subway station and the underground passage, more material resources and construction time are required in the treatment. In the prior art, the publication number CN211948580U, the patent name "Anti-leakage construction structure at the connection between the subway station construction structure and the existing underground passage", the technical scheme aims to solve the leakage risk involved in the anti-leakage construction structure at the connection between the existing underground passage. The technical scheme considered mainly takes grouting as the main technical means, and sets a grouting reinforcement layer. However, the actual treatment of the settlement and water gushing risks is still mainly based on forced maintenance, and active preventive maintenance cannot be achieved. Summary of the invention

[0003] The present invention aims to solve the technical problem that the underground waterproofing project of subway stations in the prior art lacks an effective and reliable combination of rigid and flexible waterproofing and anti-leakage, and has an active maintenance and detection implementation structural system, and provides an underground anti-leakage layer structure of the subway station and an anti-leakage control method thereof.

[0004] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0005] The underground anti-seepage layer structure of the subway station is applied to the pier node unit of the underground part of the subway station. The pier node unit includes a pier and a bearing platform. A fixed connection is formed between the upper and lower adjacent piers. Each of the piers is connected to a bearing platform, including:

[0006] One side of each of the supporting platforms is connected to an anti-leakage protection layer, and adjacent anti-leakage protection layers are connected via a connecting layer;

[0007] A drainage component is arranged at one end of the anti-leakage protection layer away from the water-facing side;

[0008] The drainage component is prefabricated in a prefabricated area, and the drainage component is connected to a threaded adjustment piece, the threaded adjustment piece can penetrate the anti-leakage protection layer and extend into an outer waterproof layer, the outer waterproof layer can be prefabricated with a water stop plate, and the side of the water stop plate away from the water-facing side is connected to an extended end of the threaded adjustment piece;

[0009] The threaded adjustment member has a hollow structure, and one end of the threaded adjustment member away from the water-facing side is connected to the drainage component. The drainage component can be connected to a negative pressure wind system, and the negative pressure wind system can enable the drainage component to maintain a negative pressure within a fixed numerical range when in working condition.

[0010] Practically, the threaded adjustment member comprises: a tube body, the outer diameter of which is formed with external threads, so that the tube body can be threaded into a threaded sleeve;

[0011] The threaded sleeve is radially connected to a mounting plate on one side of the connecting layer, and the mounting plate is connected to the connecting layer through anchoring nails;

[0012] One end of the threaded sleeve away from the water-facing side is connected to an entry pipe;

[0013] One end of the threaded sleeve located on the water-facing side is connected to a connecting joint;

[0014] A notch is formed between the connecting joint and the end of the tube body.

[0015] A filling piece is arranged inside, and the filling piece can abut between the mounting plate and the notch.

[0016] In practice, the inner tube of the connecting joint is formed with an inner tube bracket, and a positioning column is vertically connected to the center of the inner tube bracket;

[0017] The inner tube support is formed with a plurality of fan-shaped openings in an annular array.

[0018] In practice, the drainage component includes:

[0019] A drainage box, wherein the inlet pipe is in communication with the drainage box;

[0020] A lead-out pipe connected below the drainage box so that the inlet pipe and the lead-out pipe form a high-in and low-out arrangement;

[0021] The outlet connecting pipe is connected to the outlet air branch pipe through a pipeline, and a cut-off valve is arranged on the connecting pipeline.

[0022] In practice, the outlet wind branch pipe of each pier node unit is arranged to communicate with the outlet wind branch pipe of an adjacent pier node unit;

[0023] Wherein, the outlet air branch pipe of the pier node unit is connected to an air inlet main pipe through a first connecting pipe, and the outlet air branch pipe of the pier node unit is connected to an inlet air main pipe through a second connecting pipe;

[0024] The negative pressure air system comprises:

[0025] An induced draft fan connected to the outlet of the induced draft main duct;

[0026] The air inlet end of the air inlet main pipe is provided with an air inlet port;

[0027] The induced draft fan is arranged in a ground fan room.

[0028] In practice, one end of the bearing platform close to the anti-leakage protection layer is formed with a slope structure layer;

[0029] A bearing layer is formed below the anti-leakage protection layer and between the connecting layer;

[0030] A prefabricated area is formed between the bearing layer and the slope structural layer;

[0031] The drainage box is arranged and installed in the prefabricated area;

[0032] The drainage box is arranged in the interlayer;

[0033] And the drainage box is closed by a partition wall with an inspection door.

[0034] Practically, the anti-leakage protection layer is composed of a waterproof outer wall, an SBS waterproof layer, a concrete cushion layer, a polystyrene board protection layer, and a cement mortar compaction layer on the water-facing side;

[0035] An operating pipe section is formed on one side of the pipe body facing the drainage box, and a water stop strip is arranged between the radial direction of the operating pipe section and the anti-leakage protection layer;

[0036] The operating pipe section serves as a layout node for the flexible waterproof layer of the cement mortar compacted layer of the anti-leakage protective layer.

[0037] Practically, the outer waterproof layer has an outer prefabricated isolation layer, and the water stop plate is arranged in the outer prefabricated isolation layer;

[0038] A positioning sleeve is vertically connected to a surface of the water stop plate away from the water-facing side, and the positioning column penetrates into the positioning sleeve.

[0039] Practically, in the working state, the drainage component maintains a negative pressure in a fixed numerical range of -0.5 kpa to -2.5 kpa.

[0040] The anti-leakage control method of the underground anti-leakage layer structure of the subway station comprises:

[0041] Step S1, precondition confirmation, the precondition confirmation content is:

[0042] The operating valve between the pipe body and the drainage box is in a closed state;

[0043] The piers, bearing platforms, anti-leakage protective layers and external waterproof layers have been completed and meet the pre-conditions for final acceptance;

[0044] The negative pressure air system has been configured and is ready for testing or operation;

[0045] Step S2, opening all the operating valves, controlling the opening of the cut-off valve, starting the induced draft fan, confirming the pressure at various locations through the remote display terminal of the pressure sensor provided on the drainage box, and adjusting the pressure to a preset range;

[0046] When stopping debugging or operation, first shut down the induced draft fan. When all pressure sensors show no obvious pressure, close some of the shut-off valves. When the pressure sensors become stable again, close all the shut-off valves.

[0047] The present invention has the following beneficial effects:

[0048] The main advantage of this technical solution is that in the early stage of construction, that is, after the construction of the foundation piers and bearing platforms is completed, the protective measures for waterproof construction are started. The rigid waterproof measures are mainly anti-leakage protection layer and water stop plate. In order to facilitate the control of construction, threaded adjustment parts are used to assist in the control so that the anti-leakage protection layer can meet the design standards during actual construction. The drainage components are configured during the waterproof construction process, and finally the negative pressure air system is coordinated; when the conditions for commissioning are met, the negative pressure air system is activated. The negative pressure air system can form an induced draft circulation through a controllable induced draft fan and the inner cavity of the pipe body connected thereto and the drainage box, forcibly taking away capillary water vapor and achieving active protection.

[0049] Therefore, the advantages of this technical solution are that, first of all, rigid waterproofing and flexible waterproofing are combined through the configuration of threaded adjustment parts, that is, two waterproof layers are effectively set up, and the configuration of the negative pressure wind system can realize the controllable removal of capillary water vapor, and can also monitor whether there are potential hidden dangers through the pressure changes of the system, and actively monitor whether there is a risk of leakage between the subway station and the underground connection node. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] Figure 1 It is a schematic diagram of the structure of the anti-leakage protection layer and the drainage component of the present invention;

[0052] Figure 2 It is a partial enlarged view of the threaded adjustment member of the present invention;

[0053] Figure 3 It is a schematic diagram of the arrangement of the negative pressure air system of the present invention;

[0054] Figure 4 It is a schematic structural diagram of the inner tube support of the present invention;

[0055] Figure 5 A schematic diagram of a connection method of a water stop plate of the present invention;

[0056] Figure 6 It is a general schematic diagram of the underground anti-seepage layer structure of a subway station according to the present invention configured at the pier node unit;

[0057] Figure 7 It is a schematic diagram of a grooming box composed of the grooming boxes of the present invention.

[0058] The reference numerals in the figures indicate:

[0059] 1. Pier column, 2. Load-bearing platform, 3. Water stop plate;

[0060] 10. Anti-leakage protection layer, 20. Connection layer, 30. Drainage component, 40. Thread adjustment part, 50. Negative pressure air system;

[0061] 100. External waterproof layer, 101. Structural layer, 102. Bearing layer, 103. Prefabricated area, 104. Isolation wall, 105. Flexible waterproof layer;

[0062] 200. Waterproof slope, 1000. Pier node unit;

[0063] 111. Positioning column, 120. Outer prefabricated isolation layer;

[0064] 31. Guide box, 310 positioning sleeve;

[0065] 41. pipe body, 42. threaded sleeve, 43. mounting plate, 431. anchor nail, 44. connecting joint;

[0066] 410. Operating pipe section, 411. Operating valve;

[0067] 441 notch, 442 filler, 461 inner tube support, 462 fan-shaped opening;

[0068] 51. Enter takeover, 52. Export takeover;

[0069] 510. Outlet air branch pipe, 511. Shut-off valve, 520. Inlet main pipe, 530. Induced air main pipe, 540. Induced draft fan,

[0070] 521. Air inlet, 531. First connecting pipe, 532. Second connecting pipe. DETAILED DESCRIPTION

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; it should be noted that in this application, for the convenience of description, the "left side" in the current view is the "first end", the "right side" is the "second end", the "upper side" is the "first end", and the "lower side" is the "second end". The purpose of such description is to clearly express the technical solution, and it should not be understood as an improper limitation on the technical solution of this application.

[0072] The present invention aims to solve the technical problem that underground waterproofing projects in subway stations in the prior art lack an effective and reliable combination of rigid and flexible waterproofing and anti-leakage, and have an active maintenance and detection implementation structural system, and provide an underground anti-leakage layer structure and an anti-leakage control method for subway stations.

[0073] First, for the design of the underground anti-leakage layer structure of the subway station, please refer to the attached Figure 6 As shown, attached Figure 6 The actual configuration example of the underground anti-seepage layer structure of the subway station is shown in the figure, that is, the implementation method of the layout of the above-ground and underground parts of the subway station. The main layout method is to construct a pier node unit 1000 with a pier 1 and a bearing platform 2 of each layer, that is, the existing construction method is still used for the initial construction configuration, and the underground anti-seepage layer structure of the subway station is applied here. The pier 1 is also anchored into the cap steel bar. The side wall of the pier 1 is a cement-based permeable crystal layer. The part connected to the bearing platform 2 is sealed with sealing paste. The pier 1 is anchored into the cap steel bar with polymer cement mortar and a water-swelling water stop strip. In the further configuration, the design features of the present invention are reflected in, as shown in the attached figure. Figure 1 As shown in the figure, one side of each supporting platform 2 is connected to the anti-leakage protection layer 10, and the adjacent anti-leakage protection layers 10 are connected by a connecting layer 20; a drainage component 30 is arranged at one end of the anti-leakage protection layer 10 away from the water-facing side, wherein the attached Figure 1 , 2The anti-leakage protection layer 10 in the structure is used as a rigid waterproof layer, and the role of the drainage component 30 is to provide layout conditions for the flexible waterproof layer and to guide the capillary water, so as to prevent the water from gushing due to the convergence of capillary water caused by factors caused by minor geological changes. In addition, it can also prevent the local defects of the anti-leakage protection layer 10 caused by geological changes or other damages from causing the waterproof and anti-leakage performance to decrease. Therefore, in fact, the role of the drainage component 30 is to use the small negative pressure of the air to continuously guide the capillary water in the form of "sensible heat" in the air, which is equivalent to forcibly guiding the "water vapor" to achieve the removal process of the capillary water;

[0074] In the specific configuration, as shown in the attached Figure 1 , 2 As shown in, the drainage component 30 is prefabricated in a prefabricated area 103, and the drainage component 30 is connected to a threaded adjustment member 40. The threaded adjustment member 40 can penetrate the anti-leakage protection layer 10 and extend into an outer waterproof layer 100. The threaded adjustment member 40 plays a connecting role as a capillary water outlet. In addition, the threaded adjustment member 40 also serves as a component for controlling the thickness of the outer waterproof layer 100 and the anti-leakage protection layer 10 during construction configuration. The appearance of the external threaded adjustment member 40 itself is consistent with the water-stop screw in the prior art. For rigid waterproof measures, a water-stop plate 3 can be prefabricated in the outer waterproof layer 100 in the present invention. The side of the water-stop plate 3 away from the water-facing side is connected to an extended end of the threaded adjustment member 40, so that the construction positioning of the water-stop plate 3 is guaranteed. Therefore, the difference from the prior art is that the threaded adjustment member 40 has a hollow structure. 0The end away from the water-facing side is connected to the drainage component 30, and the drainage component 30 can be connected to a negative pressure wind system 50. The drainage component 30 can be connected to one end of the negative pressure wind system 50 and also forms a protruding position. The adhesion of the existing flexible waterproof layer is poor. In the prior art, if the construction material of the flexible waterproof layer is required, it is necessary to configure a raised cone as an attachment node to ensure that the structure of the flexible waterproof layer can have construction conditions. In the present technical solution, after the threaded adjustment part 40 completes its process of controlling the thickness of the anti-leakage protective layer 10, it does not need to be disassembled, that is, it is retained in the outer waterproof layer 100 and the anti-leakage protective layer 10. The threaded adjustment part 40 is the positioning component of the prefabricated construction water stop plate 3, and it is also a control component for controlling the construction thickness, and it is also an export node component for outputting capillary water vapor. Finally, the configured negative pressure wind system 50 can enable the drainage component 30 to maintain a negative pressure in a fixed numerical range under working conditions.

[0075] In a specific embodiment, please refer to the attached Figure 2 And attached Figure 3As shown, the threaded adjustment member 40 includes: a tube body 41, whose outer diameter structure is formed with an external thread, so that the tube body 41 can be screwed into a threaded sleeve 42; the threaded sleeve 42 is located on one side of the connection layer 20 and is radially connected with a mounting plate 43, and the mounting plate 43 is connected to the connection layer 20 through an anchor nail 431. The threaded adjustment member 40 is used as a water-stop screw in the following manner: the mounting plate 43 is equivalent to a water-stop sheet of the water-stop screw, which prevents the template from being fixed during concrete and prevents the template from bursting. When the outer waterproof layer 100 is under construction, the actual tube body 41 can be in a vacuum state. The principle of achieving the vacuum state is that an operating valve 411 on the water-facing side of the tube body 41 is in a closed state, and the operating valve 411 is arranged on the inlet pipe 51;

[0076] The end of the threaded sleeve 42 away from the water-facing side is connected to the entrance pipe 51; the end of the threaded sleeve 42 located on the water-facing side is connected to the connecting joint 44; a notch 441 is formed between the connecting joint 44 and the end of the tube body 41, and a filling piece 442 is arranged in the notch 441. The filling piece 442 can abut between the mounting plate 43 and the notch 441. The configuration of the filling piece 442 and the notch 441 further enhances the sealing effect of the tube body 41, that is, the tube body 41 is isolated from the connecting layer 20 and the anti-leakage protection layer 10.

[0077] In a specific embodiment, please refer to the attached Figure 1 , 2 , 4, 5, the threaded adjustment member 40 is used as a positioning connector of the water stop plate in the following manner: the inner tube of the connecting joint 44 is formed with an inner tube bracket 461, the center of the inner tube bracket 461 is vertically connected to the positioning column 111, and the inner tube bracket 461 is formed with a plurality of fan-shaped openings 462 in a circular array, as shown in the attached Figure 4 As shown, it should be noted that the configuration of the water stop plate 3 involves the positioning configuration scheme provided in this technical solution, and the bottom support configuration of the water stop plate 3 is the same as that of the prior art.

[0078] In a specific embodiment, see Figure 2 , 3 As shown, the drainage assembly 30 includes: a drainage box 31, an inlet pipe 51 connected to the drainage box 31; Figure 2 , 3 The arrangement of the drainage box 31 on one side is shown in FIG. 1 , that is, the position of the cross section of the drainage box 31 is shown. In actual configuration, the four sides of the pier column close to the water-facing surface are all equipped with drainage boxes 31, and the adjacent drainage boxes 31 are connected. The arrangement and forming form can be referred to in the attached Figure 7 As shown in , it is equivalent to the outer contour shape layout of the subway station's foundation. Similarly, the pier node unit 1000 mentioned in this application also takes the overall contour layout of the subway station as an embodiment.

[0079] In addition, the drainage assembly 30 further includes: an outlet pipe 52, which is connected to the lower part of the drainage box 31, so that the inlet pipe 51 and the outlet pipe 52 form a high-in and low-out arrangement;

[0080] The outlet pipe 52 is connected to the outlet air branch pipe 510 through a pipeline, and a cut-off valve 511 is provided on the connecting pipeline.

[0081] In a specific embodiment, please refer to the attached Figure 3 , and combined with the attached Figure 1 and attached Figure 2 As shown in , the outlet wind branch pipe 510 of each pier node unit is arranged to communicate with the outlet wind branch pipe 510 of the adjacent pier node unit;

[0082] The outlet air branch pipe 510 of the pier node unit is connected to an air inlet main pipe 520 through a first connecting pipe 531, and the outlet air branch pipe 510 of the pier node unit is connected to an induced air main pipe 530 through a second connecting pipe 532, that is, the air inlet main pipe 520 and the induced air main pipe 530 are actually connected through a drainage box formed by a drainage box 31, and the main component of the negative pressure air system 50 is an induced draft fan 540, which is connected to the outlet of the induced air main pipe 530;

[0083] The air inlet end of the air inlet main pipe 520 is separately provided with an air inlet port 521, a rainproof cap is installed on the air inlet port 521, the induced draft fan 540 is arranged in a ground fan room, and the inlet and outlet valves of the induced draft fan 540 are arranged in the ground fan room. In a more preferred embodiment, the air inlet port 521 and the outlet pipe of the induced draft fan 540 are arranged in the pipe room adjacent to the ground fan room first, the air inlet port 521 needs to be connected to the atmosphere, and the outlet of the induced draft fan 540 is arranged to be higher than the air inlet port 521;

[0084] The actual anti-leakage control method of the present technical solution is to actively guide capillary water vapor and leakage water under fault conditions, that is, the drainage box composed of the drainage box 31 and the wind branch pipe 510, the first connecting pipe 531, the second connecting pipe 532, the air inlet main pipe 520, and the air intake main pipe 530 are actually configured to form a negative pressure wind system, and the shut-off valve 511 is operated. The shut-off valve 511 is configured as an automatic regulating control valve to achieve remote control, thereby achieving communication with the drainage box 31. When the anti-leakage protection layer 10 and the outer waterproof layer 100 are completed and have a completion basis, and when the subway station enters the decoration stage, the operating valve 411 upstream of the drainage box 31 is fully opened, which is equivalent to the drainage box 31 being connected with the inside of the pipe body 41. The principle of preventing leakage is: a waterproof slope 200 is configured on the side of the outer waterproof layer 100 directly facing the water surface, and the outer waterproof layer 100 and the anti-leakage protection layer 10 are both configured to prevent leakage. On the side of the pedestal platform 2, that is, the interlayer position underground in the subway station, the interlayer position is the breakthrough point of various leakage faults, especially capillary water vapor, slight layer settlement of the lower layer due to geological changes, and the connecting layer 20 as the surface layer is actually not easy to cause leakage. The present invention focuses on breaking through the interlayer position, and realizes the flow of gas inside the pipe body 41 and the drainage box 31 to carry away the water vapor existing in the form of sensible heat or latent heat through the generation of negative pressure wind. Moreover, since the air inlet main pipe 520 and the induced air main pipe 530 are actually connected through the drainage box formed by the drainage box 31, the negative pressure formed is cyclic, and there will be no problem of negative pressure evacuation, which is safer and more reliable. In addition, since the shut-off valve 511 has controllable operation, the actual negative pressure air system 50 and the induced draft fan 540 can realize intermittent operation, and can be actively opened when facing the risk of leakage pressure, such as in the flood season, to realize anti-leakage maintenance, and this arrangement method has no additional impact on the rigid anti-leakage arrangement and the flexible anti-leakage arrangement.

[0085] In a specific embodiment, see Figure 1 , 2As shown, a slope structural layer 101 is formed at one end of the bearing platform 2 close to the anti-leakage protection layer 10; a bearing layer 102 is formed below the anti-leakage protection layer 10 and between the connecting layer 20; a prefabricated area 103 is formed between the bearing layer 102 and the slope structural layer 101; a drainage box 31 is arranged and installed in the prefabricated area 103; and the drainage box 31 is closed by a partition wall 104 with an inspection door. The main purpose of the prefabricated area 103 is that it is an extended area that needs to be configured in most subway underground construction, mainly used to cooperate with construction. The main function of the later prefabricated area 103 is to serve as an area for building frames and equipment structures for underground pipeline facilities and four-electric engineering facilities. In this technical solution, the reserved range and space of the prefabricated area 103 are more for arranging and installing the relevant configuration of the drainage box 31, and the partition wall 104 is used as a supporting wall and a closed wall. The shut-off valve 511 is arranged outside the partition wall 104, so that the partition wall 104 can better protect the drainage box 31.

[0086] In a specific embodiment, the anti-leakage protection layer 10 is composed of a waterproof exterior wall, an SBS waterproof layer, a concrete cushion layer, a polystyrene board protective layer, and a cement mortar compaction layer on the water-facing side; an operating pipe section 410 is formed on the side of the pipe body 41 facing the drainage box 31, and a water stop strip is arranged between the radial direction of the operating pipe section 410 and the anti-leakage protection layer 10; the operating pipe section 410 serves as an arrangement node for the flexible waterproof layer 105 of the cement mortar compaction layer of the anti-leakage protection layer 10, and the most widely used flexible waterproof material for the flexible waterproof layer 105 is SBC20 polyethylene polypropylene composite waterproof membrane.

[0087] In a specific embodiment, see Figure 5 As shown, the outer waterproof layer 110 has an outer prefabricated isolation layer 120, and the water stop plate 3 is arranged in the outer prefabricated isolation layer 120; the side of the water stop plate 3 away from the water-facing side is vertically connected to a positioning sleeve 310, and the positioning column 111 penetrates into the positioning sleeve 310.

[0088] In a specific embodiment, see Figure 1-6 As shown, in the working state, the negative pressure in the drainage assembly (30), that is, the drainage box 31, forms a preset pressure value range, and this pressure value range is controlled and maintained by the induced draft fan 540. The range parameter of the negative pressure in the fixed value range is: -0.5kpa to -2.5kpa;

[0089] In fact, there is still room for this range parameter, which can be configured as -0.15kpa~-2.5kpa. The monitoring of this pressure value can be configured on the drainage box 31 with a negative pressure gauge, which can be displayed on the interface of the main control center room through DCS feedback control. In actual monitoring, if the local or overall negative pressure value of the negative pressure gauge fluctuates, it can be determined that there is a fault. The types of fault conditions that can be determined include fan equipment failure, increase in capillary water content, and uncontrollable water gushing, which will cause the pressure to change. Obviously, due to the distance factor, the negative pressure at the far and near ends of the induced draft fan 540 may be different. Therefore, the actual installation configuration of the negative pressure gauge does not require full monitoring, and it is appropriate to configure it on the drainage box 31 at the far and near ends of the induced draft fan 540.

[0090] The anti-leakage control method of the underground anti-leakage layer structure of the subway station comprises:

[0091] Step S1, precondition confirmation, the precondition confirmation content is:

[0092] The operating valve 411 between the pipe body 41 and the drainage box 31 is in a closed state;

[0093] The construction of the pier 1, the bearing platform 2, the anti-leakage protection layer 10, and the outer waterproof layer 100 is completed and meets the preconditions for final acceptance;

[0094] The negative pressure air system 50 is configured and ready for testing or operation;

[0095] Step S2, open all the operating valves 411, control the opening of the cut-off valve 511, start the induced draft fan 540, confirm the pressure at various locations through the remote display terminal of the pressure sensor set in the drainage box 31, and adjust it to a preset range;

[0096] When stopping debugging or operation, first turn off the induced draft fan 540, and when all pressure sensors have no obvious pressure display, close some of the shut-off valves 511, and when the pressure sensors tend to be stable again, close all the shut-off valves 511.

[0097] To sum up, the main advantage of the present technical solution is that in the initial stage of construction, that is, after the construction of the foundation pier 1 and the bearing platform 2 is completed, the protective measures for waterproof construction are started. The rigid waterproof measures are mainly based on the anti-leakage protective layer 10 and the water stop plate 3. In order to facilitate the control of construction, the threaded adjustment member 40 is used to assist in the control so that the anti-leakage protective layer 10 can meet the design standards during actual construction. The drainage component 30 is configured during the waterproof construction process, and finally the negative pressure air system 50 cooperates; when the conditions for commissioning are met, the negative pressure air system 50 is activated. The negative pressure air system 50 can form an induced draft circulation through the controllable induced draft fan 540 and the inner cavity of the tube body 41 connected thereto and the drainage box 31, so as to forcibly carry away the capillary water vapor and realize active protection.

[0098] Therefore, the advantages of this technical solution are that, firstly, rigid waterproofing and flexible waterproofing are combined in construction through the configuration of the threaded adjustment part 40, that is, two waterproof layers are effectively set up, and the configuration of the negative pressure wind system 50 system can realize the controllable removal of capillary water vapor, and can also monitor whether there are potential hidden dangers through the pressure changes of the system, and realize active monitoring of whether there is a risk of leakage between the subway station and the underground connection node.

[0099] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An underground anti-leakage layer structure of a subway station, applied to a pier node unit underground in a subway station, the pier node unit (1000) comprising a pier (1) and a bearing platform (2), wherein upper and lower adjacent piers (1) are fixedly connected, and each pier (1) is connected to a bearing platform (2), characterized in that: include: One side of each of the carrying platforms (2) is connected to an anti-leakage protection layer (10), and adjacent anti-leakage protection layers (10) are connected via a connecting layer (20); A drainage component (30) is arranged at one end of the anti-leakage protection layer (10) away from the water-facing side; The drainage component (30) is prefabricated in a prefabricated area (103), and the drainage component (30) is connected to a threaded adjustment member (40), the threaded adjustment member (40) can penetrate the anti-leakage protection layer (10) and extend into an outer waterproof layer (100), the outer waterproof layer (100) can prefabricate a water stop plate (3), and the side of the water stop plate (3) away from the water-facing side is connected to an extended end of the threaded adjustment member (40); The threaded adjustment member (40) has a hollow structure, and one end of the threaded adjustment member (40) away from the water-facing side is connected to the drainage component (30), and the drainage component (30) can be connected to a negative pressure air system (50), and the negative pressure air system (50) can enable the drainage component (30) to maintain a negative pressure within a fixed value range in a working state; The threaded adjustment member (40) comprises: A tube body (41) having an outer diameter formed with external threads, so that the tube body (41) can be threaded into a threaded sleeve (42); The threaded sleeve (42) is radially connected to a mounting plate (43) on one side of the connecting layer (20); the mounting plate (43) is connected to the connecting layer (20) via an anchoring nail (431); One end of the threaded sleeve (42) away from the water-facing side is connected to an inlet pipe (51); One end of the threaded sleeve (42) located on the water-facing side is connected to a connecting joint (44); A notch (441) is formed between the connecting joint (44) and the end of the tube body (41), a filling piece (442) is arranged in the notch (441), and the filling piece (442) can abut between the mounting plate (43) and the notch (441); The drainage component (30) comprises: A drainage box (31), wherein the inlet pipe (51) is in communication with the drainage box (31); A discharge pipe (52) connected below the drainage box (31) so that the inlet pipe (51) and the outlet pipe (52) form a high-in and low-out arrangement; The outlet pipe (52) is connected to the outlet air branch pipe (510) through a pipeline, and a cut-off valve (511) is provided on the connecting pipeline; Arranging the outlet wind branch pipe (510) of each pier node unit to communicate with the outlet wind branch pipe (510) of an adjacent pier node unit; The outlet air branch pipe (510) of the pier node unit (1000) is connected to an air inlet main pipe (520) via a first connecting pipe (531), and the outlet air branch pipe (510) of the pier node unit is connected to an inlet air main pipe (530) via a second connecting pipe (532); The negative pressure air system (50) comprises: An induced draft fan (540) connected to the outlet of the induced draft main duct (530); An air inlet port (521) is provided at the air inlet end of the air inlet main pipe (520); The induced draft fan (540) is arranged in a ground fan room.

2. The underground anti-leakage layer structure of a subway station according to claim 1, characterized in that: The inner tube of the connecting joint (44) is formed with an inner tube bracket (461), and a positioning column (111) is vertically connected to the center of the inner tube bracket (461); The inner tube support (461) is formed with a plurality of fan-shaped openings (462) in an annular array.

3. The underground anti-leakage layer structure of a subway station as claimed in claim 2, characterized in that: An end of the bearing platform (2) close to the anti-leakage protection layer (10) is formed with a slope structural layer (101); A bearing layer (102) is formed below the anti-leakage protection layer (10) and between the connection layer (20); The prefabricated area (103) is formed between the bearing layer (102) and the slope structural layer (101); The drainage box (31) is arranged and installed in the prefabricated area (103); The drainage box (31) is enclosed by a partition wall (104) having an inspection door.

4. The underground anti-leakage layer structure of a subway station as claimed in claim 3, characterized in that: The anti-leakage protection layer (10) is composed of a waterproof outer wall, an SBS waterproof layer, a concrete cushion layer, a polystyrene board protection layer, and a cement mortar compaction layer on the water-facing side; An operating pipe section (410) is formed on one side of the pipe body (41) facing the drainage box (31), and a water stop strip is provided between the radial direction of the operating pipe section (410) and the anti-leakage protective layer (10); The operating pipe section (410) serves as a layout node for arranging a flexible waterproof layer (105) of a cement mortar compacted layer of the anti-leakage protection layer (10).

5. The underground anti-leakage layer structure of a subway station as claimed in claim 4, characterized in that: The outer waterproof layer (100) has an outer prefabricated isolation layer (120), and the water stop plate (3) is arranged in the outer prefabricated isolation layer (120); A positioning sleeve (310) is vertically connected to a surface of the water stop plate (3) away from the water-facing side, and the positioning column (111) penetrates into the positioning sleeve (310).

6. The underground anti-leakage layer structure of a subway station as claimed in claim 5, characterized in that: In the working state, the drainage component (30) maintains a negative pressure in a fixed numerical range of -0.5 kPa to -2.5 kPa.

7. The anti-leakage control method for underground anti-leakage layer structure of subway station according to claim 5, characterized in that: include: Step S1, precondition confirmation, the precondition confirmation content is: The operating valve (411) between the tube body (41) and the drainage box (31) is in a closed state; The pier column (1), the bearing platform (2), the anti-leakage protection layer (10), and the outer waterproof layer (100) have been completed and meet the preconditions for final acceptance; The negative pressure air system (50) is configured and ready for testing or operation; Step S2, opening all the operating valves (411), controlling the opening of the shut-off valve (511), starting the induced draft fan (540), confirming the pressure at various locations through the remote display terminal of the pressure sensor provided on the drainage box (31), and adjusting the pressure to a preset range; When stopping debugging or operation, the induced draft fan (540) is first turned off. When all pressure sensors show no obvious pressure, some of the shut-off valves (511) are closed. When the pressure sensors become stable again, all the shut-off valves (511) are closed.

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