CN119195229A - Underground anti-leakage layer structure of subway station and its anti-leakage control method - Google Patents
Underground anti-leakage layer structure of subway station and its anti-leakage control method Download PDFInfo
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- CN119195229A CN119195229A CN202411707785.6A CN202411707785A CN119195229A CN 119195229 A CN119195229 A CN 119195229A CN 202411707785 A CN202411707785 A CN 202411707785A CN 119195229 A CN119195229 A CN 119195229A
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- 230000003628 erosive effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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Abstract
The invention relates to the technical field of underground structural engineering of subway stations, in particular to an underground anti-seepage layer structure of a subway station and an anti-seepage control method thereof, which solve the technical problems that the underground waterproof engineering of the subway station in the prior art lacks an effective and reliable implementation structure combining rigidity with flexible waterproof and anti-seepage, and specifically, one side of each bearing table is connected with an anti-seepage protection layer, and adjacent anti-seepage protection layers are connected through a connecting layer; the anti-seepage device comprises an anti-seepage protective layer, a water stop plate, a negative pressure air system, a water stop plate, a negative pressure air system and a drain assembly, wherein the water stop plate is arranged on one end of the anti-seepage protective layer, which is far away from a water facing side, the drain assembly is arranged on one end of the anti-seepage protective layer, which is far away from the water facing side, the drain assembly is connected with the water stop plate, one end of the water stop plate, which is far away from the water facing side, is connected with the water stop plate, the drain assembly is communicated with the water stop plate, the negative pressure air system can be connected with the water stop plate, and the negative pressure air system can enable the drain assembly to keep negative pressure within a fixed numerical range under a working state.
Description
Technical Field
The invention relates to the technical field of underground structure engineering of subway stations, in particular to an underground anti-leakage layer structure of a subway station and an anti-leakage control method thereof.
Background
Along with the acceleration of the urban process, subway construction becomes the preferred strategy for solving the traffic problem in each large city. The subway station is used as the most important part of a subway system, the construction process is complex, multiple challenges and risks are often faced, and especially under the current trend, the weather environment changes so that flood prevention in rainy seasons brings test to the construction and related safety of the subway station; the construction of a subway station needs to be combined with underground engineering, even if construction is considered with the existing underground passage in planning, or construction is newly built, the construction position needs to consider the complexity of construction environment, the connection of the subway station and the underground main passage mainly considers the anti-seepage performance after construction, most of the existing treatment measures are mainly arranged in a rigid waterproof way, the effective combination with a flexible waterproof layer is difficult, the main reason is that the existing flexible waterproof material needs the construction of an attachment point, the combination with the rigid waterproof construction is difficult, the main disadvantage of the rigid waterproof is that the rigid waterproof is dependent on geological environment, the erosion repair difficulty of capillary water, gushing and water leakage is high until the water gushing phenomenon occurs, the existing treatment mode almost uses the surrounding and the filling fault position to carry out construction treatment, and more material resources and construction time are needed in the connection position of the subway station and the underground passage, the technical proposal is aimed at solving the problems that the anti-seepage construction structure of the connection of the existing underground passage is in CN211948580U, the technical proposal is mainly designed to solve the problem that the anti-seepage construction structure of the connection of the existing underground passage is reinforced, the anti-seepage structure is mainly arranged in consideration of the forced grouting and the main construction means is the forced sedimentation means for the main construction means, active preventive maintenance is not achieved.
Disclosure of Invention
The invention aims to solve the technical problems that the underground waterproof engineering of the subway station in the prior art is lack of effective and reliable combination of rigidity and flexible waterproof and anti-seepage, and the underground waterproof construction of the subway station has an active maintenance detection implementation structure system, and provides the underground anti-seepage layer structure of the subway station and an anti-seepage control method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
Underground antiseep layer structure of subway station is applied to the pier stud node unit of subway station underground part, pier stud node unit includes pier stud and load-bearing platform, forms fixed connection between upper and lower adjacent pier stud, every the load-bearing platform is connected to the pier stud, includes:
one side of each bearing table is connected with an anti-leakage protective layer, and adjacent anti-leakage protective layers are connected through a connecting layer;
A dredging component is arranged at one end of the anti-leakage protective layer, which is far away from the water facing side;
The dredging component is prefabricated in a prefabricated area, the dredging component is connected with a thread adjusting piece, the thread adjusting piece can penetrate through the anti-seepage protective layer and extend into an outer waterproof layer, the outer waterproof layer can be prefabricated with a water stop plate, and one side, away from the water facing side, of the water stop plate is connected with an extending end of the thread adjusting piece;
the screw thread adjusting piece has hollow structure, the screw thread adjusting piece is kept away from the one end intercommunication of windward side dredge the subassembly, dredge the subassembly and can connect a negative pressure wind system, negative pressure wind system can make dredge the subassembly and keep the negative pressure of fixed numerical range under operating condition.
The thread adjusting member comprises a pipe body, wherein the outer diameter of the pipe body is formed with external threads, so that the pipe body can be screwed into a threaded sleeve;
The threaded sleeve is radially connected with a mounting disc which is positioned on one side of the connecting layer, and the mounting disc is connected to the connecting layer through an anchoring nail;
one end of the threaded sleeve, which is far away from the water facing side, is connected with an inlet connecting pipe;
one end of the threaded sleeve, which is positioned on the water facing side, is connected with a connecting joint;
A gap is formed between the connecting joint and the end part of the pipe body, and the gap
The inside is provided with a filling piece, and the filling piece can be abutted between the mounting plate and the notch.
The inner tube of the connecting joint is provided with an inner tube support, and the center of the inner tube support is vertically connected with a positioning column;
The inner tube support is formed with a plurality of fan-shaped openings in an annular array.
In practice, the grooming assembly comprises:
The inlet connecting pipe is communicated with the dredging box;
A lead-out nipple connected below the breakout box such that the ingress nipple and the lead-out nipple form a high-in low-out arrangement;
The guiding-out connecting pipe is connected to the guiding-out air branch pipe through a pipeline, and a cut-off valve is arranged on the connecting pipeline.
In an embodiment, the wind-guiding branch pipe of each pier stud node unit is arranged to be communicated with the wind-guiding branch pipe of the adjacent pier stud node unit;
the air outlet branch pipe of the pier stud node unit is connected to an air inlet main pipe through a first connecting pipe, and the air outlet branch pipe of the pier stud node unit is connected to an air inlet main pipe through a second connecting pipe;
the negative pressure wind system includes:
the induced draft fan is connected to the outlet of the induced draft main pipe;
the air inlet end of the air inlet main pipe is provided with an air inlet pipe orifice;
the induced draft fan is arranged in a ground fan chamber.
Practically, one end of the bearing platform, which is close to the anti-leakage protection layer, is provided with a slope structural layer;
a bearing layer is formed between the lower part of the anti-leakage protective layer and the connecting layer;
A prefabricated area is formed between the bearing layer and the slope structural layer;
the dredging box is arranged in the prefabrication area;
the dredging box is arranged in the interlayer;
And the dredging box is closed by a partition wall with an access door.
The anti-seepage protective layer comprises a waterproof outer wall, an SBS waterproof layer, a concrete cushion layer, a polystyrene board protective layer and a cement mortar ramming layer;
an operation pipe section is formed on one side of the pipe body facing the dredging box, and a water stop bar is arranged between the radial direction of the operation pipe section and the anti-leakage protection layer;
The operating pipe section is used as an arrangement node of a flexible waterproof layer of a cement mortar ramming layer for arranging an anti-seepage protective layer.
The outer waterproof layer is provided with an outer prefabricated isolating layer, and the water stopping plate is arranged in the outer prefabricated isolating layer;
One surface of the water stop plate, which is far away from the water facing side, is vertically connected with a positioning sleeve, and the positioning column penetrates into the positioning sleeve.
In the working state, the negative pressure of the dredging component in a fixed numerical range is in a range of-0.5 kpa to-2.5 kpa.
The anti-leakage control method of the underground anti-leakage layer structure of the subway station comprises the following steps of
Step S1, confirming the precondition, wherein the precondition confirmation content is as follows:
the operation valve between the pipe body and the dredging box is in a closed state;
The pier stud, the bearing platform, the anti-seepage protective layer and the outer waterproof layer complete construction and have the precondition of completion acceptance;
the negative pressure air system is configured and has test or operation conditions;
Step S2, opening all the operation valves, controlling to open a cut-off valve, starting an induced draft fan, confirming the pressure at each place through a remote display end arranged on a dredging box pressure sensor, and adjusting to a preset range;
When the debugging or the operation is stopped, the induced draft fan is firstly closed, when all the pressure sensors have no obvious pressure display, part of the shut-off valves are closed, and when the pressure sensors tend to be stable again, all the shut-off valves are closed.
The invention has the following beneficial effects:
The technical scheme has the main advantages that in the initial stage of construction, namely after the construction of a pier column and a bearing platform of a foundation is finished, protective measures of waterproof construction are started, the rigid waterproof measures mainly comprise an anti-leakage protective layer and a water stop plate, in order to facilitate control of construction, the anti-leakage protective layer can reach design standards in the actual construction by adopting auxiliary control of a thread adjusting piece, a dredging component is configured in the waterproof construction process, and finally a negative pressure air system is matched, when the test condition of application is met, the negative pressure air system is started, and can form induced air circulation through a controllable induced draft fan, an inner cavity of a pipe body communicated with the controllable induced draft fan and the negative pressure air system and a dredging box, so that capillary water vapor is forcedly taken away, and active protection is realized.
Therefore, the technical scheme has the advantages that firstly, the construction combination is realized by configuring the rigid waterproof and the flexible waterproof through the threaded adjusting piece, namely, the two waterproof layers are effectively arranged, the configuration of the negative pressure wind system can realize controllable capillary water vapor removal, and whether potential hidden danger exists or not can be monitored through the pressure change of the system, so that whether leakage risk exists between the subway station and the underground connection node or not is actively monitored.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of an anti-leakage protection layer and a dredging assembly configuration of the present invention;
FIG. 2 is an enlarged view of a portion of a threaded adjustment member according to the present invention;
FIG. 3 is a schematic illustration of the negative pressure wind system arrangement of the present invention;
FIG. 4 is a schematic structural view of an inner tube bracket according to the present invention;
FIG. 5 is a schematic view of a connection mode of the water stop plate of the present invention;
FIG. 6 is a general schematic diagram of the configuration of the underground anti-leakage layer structure of the subway station at the pier stud node unit of the present invention;
fig. 7 is a schematic view of a dredging box composed of the dredging box of the invention.
Reference numerals in the drawings denote:
1. pier stud, 2, bearing platform, 3, water stop plate;
10. An anti-leakage protective layer, 20 parts of a connecting layer, 30 parts of a dredging assembly, 40 parts of a thread adjusting piece and 50 parts of a negative pressure air system;
100. an outer waterproof layer, a construction layer, a bearing layer, a construction layer and a bearing layer 103, prefabricating areas, 104, isolating walls, 105, and a flexible waterproof layer;
200. Waterproof inclined plane, 1000. Pier stud node unit;
111. positioning columns, 120. Prefabricating isolation layers on the outer layers;
31. a dredging box and 310 positioning sleeve;
41. The pipe body, 42, a threaded sleeve, 43, a mounting disc, 431, an anchor nail and 44, and a connecting joint;
410. operating the pipe section, 411;
441 cutouts, 442, packing, 461, inner tube holder, 462, scallops;
51. the inlet connecting pipe and the outlet connecting pipe 52;
510. The air outlet branch pipe, 511, the shut-off valve, 520, the air inlet main pipe, 530, the air inlet main pipe, 540, the induced draft fan,
521. Inlet pipe mouth, 531. First takeover, 532. Second takeover.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art without making any creative effort are within the protection scope of the present application based on the embodiments of the present application, and it should be noted that, for convenience of description, the present application is described with "left side" as "first end", "right side" as "second end", "upper side" as "first end" and "lower side" as "second end" in the current view, so that the description is for clearly expressing the technical solution and should not be construed as unduly limiting the technical solution of the present application.
The invention aims to solve the technical problems that the underground waterproof engineering of the subway station in the prior art is lack of effective and reliable combination of rigidity and flexible waterproof and anti-seepage, and has an active maintenance detection implementation structure system, and provides an underground anti-seepage layer structure of the subway station and an anti-seepage control method.
Firstly, designing an underground anti-seepage layer structure of a subway station, referring to fig. 6, an embodiment of practical configuration of the underground anti-seepage layer structure of the subway station is shown in fig. 6, namely an implementation mode of arrangement of the underground part and the ground part of the subway station is shown, the main arrangement mode is that a pier column node unit 1000 is constructed by a pier column 1 and a bearing platform 2 of each layer, namely initial construction configuration is still carried out by adopting the existing construction mode, the underground anti-seepage layer structure of the subway station is applied here, the pier column 1 is also anchored into a bearing platform reinforcing steel bar, the side wall of the pier column 1 is a cement-based seepage crystallization layer, the part connected with the bearing platform 2 is sealed by adopting sealing ointment, the part of the pier column 1 anchored into the bearing platform reinforcing steel bar is arranged by adopting polymer cement mortar and water-swelling sealing bars, and in further configuration, the design characteristics of the invention are shown in fig. 1, one side of each bearing platform 2 is connected with an anti-seepage protection layer 10, and the adjacent anti-seepage protection layers 10 are connected by a connecting layer 20; the end of the anti-leakage protection layer 10 far away from the water facing side is provided with a dredging component 30, wherein the anti-leakage protection layer 10 in fig. 1 and 2 is used as a rigid waterproof layer, the dredging component 30 plays a role of providing arrangement conditions for the flexible waterproof layer and dredging as capillary water, preventing water from being gushed due to the aggregation of the capillary water caused by factors caused by tiny geological changes, and preventing the anti-leakage protection layer 10 from being degraded due to the local defect of the anti-leakage protection layer 10 caused by geological changes or other damage conditions, so that the dredging component 30 plays a role of utilizing the smaller negative pressure of air to continuously dredge the capillary water expressed in a sensible heat mode in the air, the method is equivalent to the mode of forcibly dredging water vapor to realize the process of removing capillary water;
in a specific configuration, as shown in fig. 1 and 2, the dredging assembly 30 is prefabricated in a prefabricated area 103, and the dredging assembly 30 is connected with a thread adjusting member 40, the thread adjusting member 40 can penetrate through the anti-leakage protection layer 10 and extend into an outer waterproof layer 100, the thread adjusting member 40 plays a role of communicating, and is used as a capillary water outlet, in addition, the thread adjusting member 40 is used as a component for controlling the thickness of the outer waterproof layer 100 and the anti-leakage protection layer 10 in construction configuration, the appearance of the external thread adjusting member 40 is consistent with that of a water stopping screw in the prior art, and for a rigid waterproof measure, a water stopping plate 3 can be prefabricated on the outer waterproof layer 100, and one side, far away from the water facing side, of the water stopping plate 3 is connected with an extending end of the thread adjusting member 40, so that the construction positioning of the water stopping plate 3 is guaranteed, therefore, the construction positioning device is different from the prior art: the thread adjusting member 40 has a hollow structure, one end of the thread adjusting member 40 far away from the water facing side is communicated with the dredging assembly 30, the dredging assembly 30 can be connected with a negative pressure air system 50, one end of the dredging assembly 30 can be connected with the negative pressure air system 50 to form a convex position, the adhesiveness of the existing flexible waterproof layer is poor, if the construction material of the flexible waterproof layer is needed in the prior art, a convex round table needs to be configured as an attachment node to ensure that the structure of the flexible waterproof layer can have construction conditions, in the technical scheme, after the thread adjusting member 40 finishes the thickness process of controlling the anti-leakage protection layer 10, the thread adjusting member 40 is not required to be disassembled, namely, the thread adjusting member is reserved in the outer waterproof layer 100 and the anti-leakage protection layer 10, the thread adjusting member 40 is a positioning part of the prefabricated construction water stop plate 3 and is also a control part for controlling the construction thickness, also the leading-out node part for outputting capillary vapor, finally, the negative pressure wind system 50 can make the dredging assembly 30 maintain the negative pressure with a fixed value range under the working state.
In a specific embodiment, referring to fig. 2 and 3, the screw thread adjusting member 40 comprises a pipe body 41, an external thread is formed on the external diameter structure of the pipe body 41, so that the pipe body 41 can be screwed into a screw thread sleeve 42, a mounting disc 43 is radially connected to one side of the screw thread sleeve 42, which is positioned on the connecting layer 20, the mounting disc 43 is connected to the connecting layer 20 through an anchoring nail 431, the screw thread adjusting member 40 is used as a water stop screw in such a way that the mounting disc 43 is equivalent to a water stop sheet of the water stop screw, a template is fixed when preventing concrete from bursting, and the external waterproof layer 100 can be in a vacuum state when being constructed, and the principle of realizing the vacuum state is that an operation valve 411 of the pipe body 41 on the principle water facing side is in a closed state, and the operation valve 411 is arranged on an inlet connection pipe 51;
The end of the threaded sleeve 42 far away from the water facing side is connected with the inlet connecting pipe 51, the end of the threaded sleeve 42 located on the water facing side is connected with the connecting joint 44, a gap 441 is formed between the connecting joint 44 and the end of the pipe body 41, a filling piece 442 is arranged in the gap 441, the filling piece 442 can be abutted between the mounting disc 43 and the gap 441, and the sealing effect of the pipe body 41 is further enhanced due to the arrangement of the filling piece 442 and the gap 441, namely, the pipe body 41 is kept isolated from the connecting layer 20 and the anti-leakage protection layer 10.
In a specific embodiment, referring to fig. 1, 2,4 and 5, the screw thread adjusting member 40 is used as a positioning connector of a water stop plate in such a manner that an inner tube of the connecting joint 44 is formed with an inner tube support 461, a positioning column 111 is vertically connected to the center of the inner tube support 461, and a plurality of fan-shaped openings 462 are formed in an annular array of the inner tube support 461, as shown in fig. 4, it should be noted that the configuration of the water stop plate 3 relates to the positioning configuration scheme given by the present technical scheme, and the bottom supporting configuration of the water stop plate 3 is the same as that of the prior art.
In a specific embodiment, referring to fig. 2 and 3, the dredging assembly 30 includes a dredging box 31, an inlet connection pipe 51 is communicated with the dredging box 31, and fig. 2 and 3 show that the dredging box 31 is arranged at one side, that is, the position of the cross section of the dredging box 31 is shown, in practical configuration, the dredging boxes 31 are configured on four sides of a pier column adjacent to an upstream surface, and adjacent dredging boxes 31 are connected, and the arrangement and forming form can be referred to as the external contour shape arrangement of a subway station occupation basis, and in the same way, the pier column node unit 1000 is also arranged in the overall contour of the subway station as an embodiment.
The dredging assembly 30 further comprises a lead-out adapter 52 connected below the dredging box 31 such that the inlet adapter 51 and the lead-out adapter 52 form a high-in low-out arrangement;
The outlet connection pipe 52 is connected to the outlet branch pipe 510 through a pipe, and a shut-off valve 511 is provided on the connection pipe.
In one particular embodiment, referring to FIG. 3, and in combination with the illustrations of FIG. 1 and FIG. 2, a wind-out branch 510 of each pier stud node unit is arranged to communicate with a wind-out branch 510 of an adjacent pier stud node unit;
The wind-guiding branch pipe 510 of the pier stud node unit is connected to a wind-in main pipe 520 through a first connecting pipe 531, the wind-guiding branch pipe 510 opposite to the pier stud node unit is connected to a wind-guiding main pipe 530 through a second connecting pipe 532, that is, the wind-in main pipe 520 and the wind-guiding main pipe 530 are actually communicated through a guiding box formed by the guiding box 31, and the main component of the negative pressure wind system 50 is a draught fan 540 connected to the outlet of the wind-guiding main pipe 530;
The wind inlet end of the wind inlet main pipe 520 is separately provided with a wind inlet pipe opening 521, a rain cap is arranged on the wind inlet pipe opening 521, the induced draft fan 540 is arranged in a ground fan chamber, the ground fan chamber is provided with inlet and outlet valves of the induced draft fan 540, in a more preferred embodiment, the wind inlet pipe opening 521 and the outlet pipe of the induced draft fan 540 are arranged between the pipes adjacent to the ground fan chamber, the wind inlet pipe opening 521 needs to be communicated with the atmosphere, and the outlet arrangement of the induced draft fan 540 is higher than the wind inlet pipe opening 521;
the actual antiseep control method of the technical scheme is that the dredge box formed by the dredge box 31 is actively dredged with capillary water vapor and seepage water under faults, namely, the dredge box is in full opening with the inside of a pipe body 41 after a subway station enters a decoration stage, the principle of realizing prevention is that one side of the outer waterproof layer 100, which directly faces the upstream surface, is provided with a waterproof inclined plane 200 as an interlayer position of a subway station, which is a breakthrough point of various seepage faults, particularly the situation that the capillary water vapor and the operation valve 411 at the upstream of the dredge box 31 are in easy connection with each other, namely, the underground position of the subway station breaks through the underground position of the platform 2, and the operation valve 411 at the upstream of the dredge box 31 is in full opening with the inside of the pipe body 41 under the situation of a building foundation, and the principle of preventing the dredge box 31 from being in communication with the inside of the pipe body 41 is realized, namely, the outer waterproof layer 100 is arranged at the side of the upstream surface of the water, namely, the underground position of the subway station is provided with an underground position of the anti-seepage platform 2, the interlayer position of the underground station is in easy connection with the capillary water vapor and the air vapor, and the main pipe body 20 is in full opening with the situation that the negative pressure is in the situation that the underground position of the underground water vapor is in the underground station, the underground layer is in full opening of the situation of the pipe body, the main pipe body is in the situation of the negative pressure is in fact that the negative pressure is in the situation of the air-sealing layer, the underground layer is in fact carried out of the situation, the negative air is in the situation of the air-sealing layer is in fact in the situation of the air-sealing box, and the air-sealing layer is in fact in the air-sealing condition, and the air-down situation, and the negative-down situation is in the air-sealing condition is more communication with the air-down condition is in fact filled and the air-down condition is in fact filled condition is in fact; in addition, since the cut-off valve 511 has a controllable operation, the actual negative pressure air system 50 and the induced draft fan 540 can be operated intermittently, the anti-seepage device can be actively opened under the condition of facing leakage pressure risks such as flood prevention seasons and the like, anti-seepage maintenance is realized, and the arrangement mode has no additional influence on the arrangement of rigid anti-seepage and flexible anti-seepage.
In a specific embodiment, as shown in fig. 1 and 2, a slope structure layer 101 is formed at one end of a bearing platform 2 near a leakage protection layer 10, a bearing layer 102 is formed between the lower part of the leakage protection layer 10 and a connecting layer 20, a prefabricated area 103 is formed between the bearing layer 102 and the slope structure layer 101, a dredging box 31 is arranged in the prefabricated area 103, the dredging box 31 is closed by a partition wall 104 with an access door, the main purpose of the prefabricated area 103 is that the prefabricated area is an extension area which needs to be configured in most underground subway construction and is mainly used for cooperation construction, the later prefabricated area 103 mainly serves as an area for building a frame and an equipment structure of underground pipeline facilities and four-electrical engineering facilities, in the technical scheme, the reserved range and the space of the prefabricated area 103 are more, the relevant configuration for arranging the dredging box 31 is used as a supporting wall and a sealing wall, and the isolating wall 104 is arranged outside the isolating wall 104, and the isolating wall 104 can better protect the dredging box 31.
In a specific embodiment, the anti-leakage protective layer 10 is composed of a waterproof outer wall, an SBS waterproof layer, a concrete cushion layer, a polystyrene board protective layer and a cement mortar ramming layer on the water facing side, an operation pipe section 410 is formed on the side of the pipe body 41 facing the dredging box 31, a water stop strip is arranged between the radial direction of the operation pipe section 410 and the anti-leakage protective layer 10, the operation pipe section 410 is used as an arrangement node of a flexible waterproof layer 105 for arranging the cement mortar ramming layer of the anti-leakage protective layer 10, and the flexible waterproof layer 105 is the SBC20 polyethylene polypropylene composite waterproof coiled material most widely used.
In a specific embodiment, referring to fig. 5, the outer waterproof layer 110 has an outer prefabricated isolating layer 120, the water stop plate 3 is disposed in the outer prefabricated isolating layer 120, and 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.
In a specific embodiment, referring to fig. 1-6, in an operating state, the negative pressure in the dredging assembly (30), i.e. the dredging box 31, forms a preset pressure value range, the pressure value range is controlled and maintained by the induced draft fan 540, and the range parameter of the negative pressure of the maintained fixed value range is-0.5 kpa to-2.5 kpa;
In practice, the range parameter still has a margin, which can be configured to be-0.15 kpa to-2.5 kpa, the negative pressure meter can be configured on the dredging box 31 through DCS feedback control, the negative pressure meter is displayed on the interface of the main control center chamber, in actual monitoring, if the local or whole negative pressure value of the negative pressure meter has fluctuation, it can be judged that there is fault filling, the type of fault state can be judged to include fan equipment fault, the capillary water content is increased, uncontrollable water gushing occurs, the pressure can be changed, obviously, due to the distance factor, the negative pressure far from the far end and near end of the induced draft fan 540 may be different, therefore, the actual installation configuration of the negative pressure meter does not need to be monitored completely, and the installation configuration on the dredging box 31 far end and near end of the induced draft fan 540 is preferable.
The anti-leakage control method of the underground anti-leakage layer structure of the subway station comprises the following steps:
step S1, confirming the precondition, wherein the precondition confirmation content is as follows:
the operation valve 411 between the pipe body 41 and the dredging box 31 is in a closed state;
Pier column 1, bearing platform 2, antiseep protective layer 10, outer waterproof layer 100 finish construction, and possess the precondition of completion acceptance;
The negative pressure air system 50 is configured and has test or operation conditions;
Step S2, all the operation valves 411 are opened, the cut-off valve 511 is controlled to be opened, the induced draft fan 540 is opened, and the pressure at each place is confirmed through a remote display end of a pressure sensor arranged on the dredging box 31 and is regulated to a preset range;
Wherein, when stopping debugging or operation, firstly, the induced draft fan 540 is closed, when all the pressure sensors have no obvious pressure display, the partial shut-off valve 511 is closed, and when the pressure sensors are stabilized again, all the shut-off valves 511 are closed.
In summary, the main advantage of the present solution is that, in the initial stage of construction, i.e. after the construction of the pier stud 1 and the bearing platform 2 of the foundation is completed, the protection measures of waterproof construction are started, the rigid waterproof measures mainly include the anti-leakage protection layer 10 and the water stop plate 3, in order to facilitate the control of the construction, the anti-leakage protection layer 10 can reach the design standard in the actual construction by using the screw thread adjusting member 40 for auxiliary control, the dredging assembly 30 is configured in the waterproof construction process, and finally the negative pressure air system 50 is matched, when the test condition is applied, the negative pressure air system 50 is started, and the negative pressure air system 50 can form the induced air circulation through the controllable induced draft fan 540 and the inner cavity of the pipe 41 communicated with the induced draft fan and the dredging box 31, so as to forcedly take away the capillary water vapor, thereby realizing the active protection.
Therefore, the advantage of this technical scheme lies in, at first, the construction combination is realized with the waterproof and flexible waterproof of rigidity through the configuration of screw thread adjustment spare 40, promptly set up two kinds of waterproof layers effectively, and the configuration of negative pressure wind system 50 system can realize controllable take away capillary steam, and whether the pressure variation control of accessible system has potential hidden danger, realizes the emergence of the leakage risk of initiative monitoring subway station and underground connected node.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. Underground antiseep layer structure of subway station is applied to underground pier stud node unit of subway station, pier stud node unit (1000) include pier stud (1) and loading platform (2), upper and lower adjacent form fixed connection between pier stud (1), every loading platform (2) are connected to pier stud (1), a serial communication port, include:
one side of each bearing table (2) is connected with an anti-seepage protective layer (10), and adjacent anti-seepage protective layers (10) are connected through a connecting layer (20);
A dredging component (30) is arranged at one end of the anti-seepage protective layer (10) far away from the water facing side;
The dredging assembly (30) is prefabricated in a prefabricated area (103), the dredging assembly (30) is connected with a thread adjusting piece (40), the thread adjusting piece (40) can penetrate through the anti-seepage protective layer (10) and extend into an outer waterproof layer (100), the outer waterproof layer (100) can be prefabricated into a water stopping plate (3), and one side, far away from the water facing side, of the water stopping plate (3) is connected with an extending end of the thread adjusting piece (40);
the screw thread adjusting piece (40) is of a hollow structure, one end, away from the water facing side, of the screw thread adjusting piece (40) is communicated with the dredging assembly (30), the dredging assembly (30) can be connected with a negative pressure air system (50), and the negative pressure air system (50) can enable the dredging assembly (30) to keep negative pressure in a fixed numerical range under a working state.
2. Underground leakage-proof layer structure of subway station according to claim 1, characterized in that said screw thread adjusting member (40) comprises:
A tube body (41) with an external thread formed on its outer diameter so that the tube body (41) can be screwed into a threaded sleeve (42);
A mounting disc (43) is radially connected to one side of the connecting layer (20) of the threaded sleeve (42), and the mounting disc (43) is connected to the connecting layer (20) through an anchor nail (431);
one end of the threaded sleeve (42) far away from the water facing side is connected with an inlet connecting pipe (51);
one end of the threaded sleeve (42) positioned on the water facing side is connected with a connecting joint (44);
A gap (441) is formed between the connecting joint (44) and the end part of the pipe body (41), a filling piece (442) is arranged in the gap (441), and the filling piece (442) can be abutted between the mounting disc (43) and the gap (441).
3. Underground anti-seepage layer structure of subway station according to claim 2, characterized in that the inner tube of the connection joint (44) is formed with an inner tube bracket (461), the center of the inner tube bracket (461) is vertically connected with a positioning column (111);
The inner tube holder (461) is formed with a plurality of sector-shaped openings (462) in an annular array.
4. The underground anti-leakage layer structure of a subway station according to claim 2, characterized in that said dredging assembly (30) comprises:
-a dredging box (31), the inlet nipple (51) being in communication with the dredging box (31);
-an outlet nipple (52) connected below the dredging box (31) such that the inlet nipple (51) forms a high-in low-out arrangement with the outlet nipple (52);
The guiding-out connecting pipe (52) is connected to the guiding-out wind branch pipe (510) through a pipeline, and a cut-off valve (511) is arranged on the connecting pipeline.
5. The underground leakage preventing layer structure of a subway station according to claim 4, wherein said wind-guiding out branch pipe (510) of each of said pier stud node units is arranged to communicate with a wind-guiding out branch pipe (510) of an adjacent pier stud node unit;
Wherein the wind-out branch pipe (510) of the pier stud node unit (1000) is connected to a wind-in main pipe (520) through a first connecting pipe (531), and the wind-out branch pipe (510) opposite to the pier stud node unit is connected to a wind-out main pipe (530) through a second connecting pipe (532);
the negative pressure wind system (50) comprises:
the induced draft fan (540) is connected to the outlet of the induced draft main pipe (530);
The air inlet end of the air inlet main pipe (520) is provided with an air inlet pipe orifice (521);
The induced draft fan (540) is arranged in a ground fan chamber.
6. Underground anti-leakage layer structure of subway station according to claim 5, characterized in that the end of the bearing platform (2) close to the anti-leakage protection layer (10) is formed with a slope construction layer (101);
a bearing layer (102) is formed between the lower part of the anti-leakage protective layer (10) and the connecting layer (20);
-forming the pre-fabricated area (103) between the carrier layer (102) and the ramp construction layer (101);
-arranging and mounting said dredging box (31) in said pre-formed area (103);
the drain box (31) is closed by a partition wall (104) with access doors.
7. The underground antiseep layer structure of the subway station according to claim 6, wherein the antiseep 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 rammed layer on the water facing side;
an operation pipe section (410) is formed on one side of the pipe body (41) facing the dredging box (31), and a water stop strip is arranged between the radial direction of the operation pipe section (410) and the anti-seepage protective layer (10);
the operating pipe section (410) serves as an arrangement node for a flexible waterproof layer (105) of a cement mortar rammed layer of the anti-leakage protection layer (10).
8. The underground anti-leakage layer structure of the subway station according to claim 7, wherein the outer waterproof layer (110) has an outer prefabricated isolating layer (120), and the water stop plate (3) is arranged in the outer prefabricated isolating layer (120);
One surface of the water stop plate (3) far away from the water facing side is vertically connected with a positioning sleeve (310), and the positioning column (111) penetrates into the positioning sleeve (310).
9. Underground anti-seepage layer structure of subway station according to claim 1, characterized in that the negative pressure of the dredging assembly (30) kept in a fixed value range is-0.5 kpa to-2.5 kpa in the working state.
10. The method for controlling the leakage prevention of the underground leakage prevention layer structure of the subway station according to claim 6, comprising:
step S1, confirming the precondition, wherein the precondition confirmation content is as follows:
an operation valve (411) between the pipe body (41) and the dredging box (31) is in a closed state;
The pier stud (1), the bearing platform (2), the anti-leakage protective layer (10) and the outer waterproof layer (100) finish construction and have the precondition of completion acceptance;
the negative pressure air system (50) is configured and has test or operation conditions;
Step S2, all the operation valves (411) are opened, the cut-off valve (511) is controlled to be opened, the induced draft fan (540) is opened, and the pressure at each place is confirmed through a remote display end of a pressure sensor arranged on the dredging box (31) and is regulated to a preset range;
When the debugging or the operation is stopped, the induced draft fan (540) is firstly closed, when all the pressure sensors have no obvious pressure display, part of the shut-off valves (511) are closed, and when the pressure sensors are stabilized again, all the shut-off valves (511) are closed.
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| KR20240040874A (en) * | 2022-09-22 | 2024-03-29 | 오창균 | Construction method and construction structure of water expansion index to prevent leakage of underground continuous wall |
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| US20190085525A1 (en) * | 2016-12-14 | 2019-03-21 | Hohai University | Simple method for determining breakthrough time of anti-seepage liners in landfill |
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