Method for improving anti-seepage performance of side wall of subway station by arranging guide plates on side wall

Abstract

The invention relates to the field of subway station buildings, and particularly provides a method for improving the anti-seepage performance of a side wall of a subway station by arranging guide plates on the side wall. S2, a flow guide plate is installed, and after construction of the cement mortar leveling layer is completed, the flow guide plate is installed on the surface of the cement mortar leveling layer; s3, laying a water collecting tank; s4, a waterproof layer is constructed, specifically, waterproof coiled materials are laid outside the flow guide plates to form a coiled material waterproof layer; and S5, side wall pouring. When liquid generated by leakage flows to the flow guide plate, the liquid flows downwards along the surface of the flow guide plate, and when the leaked liquid is less, because water flow cannot penetrate through the flow guide plate, the horizontal grooves in the flow guide plate can enable a small amount of liquid generated by leakage to be retained in the horizontal grooves, and leakage point diffusion caused by flowing of the leaked liquid is avoided; when the amount of leaked liquid is large, the leaked liquid is collected in a centralized mode, and the situation that the leaked liquid is diffused in a large range to damage other non-leaked parts is avoided.

Description

Technical Field

[0001] The invention relates to the field of subway station construction, and in particular to a method for improving the anti-seepage performance of a side wall of a subway station by arranging a guide plate on the side wall. Background Art

[0002] During the construction and operation of subway stations, due to the complex environment and many weak points in anti-seepage, water leakage is very common in the top plate, side wall, bottom plate and other locations. After the subway station is built, leakage control is difficult, costly and ineffective. In addition, the proportion of re-leakage after control is large, which affects the operation and maintenance of the subway. In severe cases, it even affects the durability of the main structure and causes engineering risks. Therefore, it is necessary to improve the anti-seepage performance of subway stations.

[0003] The waterproofing of the main structure of the subway station mainly relies on the waterproofing performance of the structure itself, and consists of three parts: the retaining structure, the additional flexible waterproof layer, and the self-waterproofing of the main structure concrete. The first is the waterproofing of the station foundation pit retaining structure. When the ground-connected wall is used as the supporting structure, the waterproofing performance of the ground-connected wall itself is the main factor. The waterproofing between the retaining structure and the main structure mainly relies on the additional fully-covered flexible waterproof layer material. The waterproofing of the main structure concrete mainly relies on the waterproofing performance of the concrete material itself after the main structure is built.

[0004] Due to the complex construction conditions of subway stations and the many weak waterproofing points of the project, leakage is very likely to occur. The leakage of the station is mainly caused by the damage of the enclosure structure, the waterproof layer, and the main structure. At present, the research on the leakage problem of subway stations mainly focuses on the improvement of construction technology and passive plugging and repair. The improvement of construction technology includes enhancing the casting quality of ground walls or piles, doing a good job of waterproofing at the joints, reducing the burr chamfer of the base surface when installing the flexible waterproof layer, improving the maintenance level of the main structure concrete, and improving the treatment level of the reserved holes and seams in the project. When leakage occurs, the treatment follows the principle of plugging as the main and drainage as the auxiliary. For possible leakage of structural surfaces or structural seams, grouting flexible materials are used to repair them. However, the treatment and repair effect is not durable. When the stratum water pressure increases, it will be damaged again and leak. Therefore, how to reduce the seepage of the side walls of subway stations when leakage occurs is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to solve the problem of excessive water seepage in the side walls of subway stations when leakage occurs, the present invention provides a method for improving the anti-seepage performance of the side walls of subway stations by arranging guide plates on the side walls to solve the above problem. The technical solution adopted by the present invention to solve its technical problems is: a method for improving the anti-seepage performance of the side walls of a subway station by arranging guide plates on the side walls, comprising the following steps: S1, leveling layer construction, applying cement mortar on the outer side of the underground continuous wall for leveling, and forming a cement mortar leveling layer after the cement mortar solidifies; S2, installing the guide plate, after the cement mortar leveling layer construction is completed, installing the guide plate on the surface of the cement mortar leveling layer; S3, ditch laying, laying a ditch at the bottom of the guide plate, the ditch is used to receive water flowing down through the guide plate, and the ditch is connected to a small water pump; S4, waterproof layer construction, laying waterproof membrane outside the guide plate to form a membrane waterproof layer; S5, side wall casting, excavating a deep pit on the ground outside the waterproof membrane, laying a template in the deep pit and hoisting a steel cage, and then pouring concrete to form a waterproof reinforced concrete side wall. Preferably, in S2, a plurality of horizontal grooves are arranged on the surface of the guide plate.

[0006] Preferably, in S3, vertical guide grooves are provided at both ends of the horizontal grooves on the guide plate, and the plurality of horizontal grooves are connected to the water collecting trough through the vertical guide grooves.

[0007] Preferably, in S4, the waterproof roll layer is a self-adhesive waterproof roll.

[0008] Preferably, in S5, the bottom of the steel cage is bent to form an L-shaped structure.

[0009] Preferably, a hydrophilic film is adhered to the surface of the guide plate.

[0010] Preferably, the thickness of the guide plate is smaller than the thickness of the waterproofing membrane.

[0011] The beneficial effect of the present invention is that a guide plate is provided, and when the liquid generated by the leakage flows to the guide plate, the liquid will flow downward along the surface of the guide plate. When the leaked liquid is small, since the water flow cannot pass through the guide plate, the horizontal grooves on the guide plate can retain the small amount of liquid generated by the leakage therein, thereby preventing the leaked liquid from flowing around and causing the leakage point to spread. When the leaked liquid is large, most of the liquid can flow along the horizontal grooves on the surface of the guide plate to the two sides of the guide plate so as to collect the leaked liquid in a centralized manner. At the same time, multiple horizontal grooves can also prevent the leaked liquid from flowing downward over a large area, thereby reducing the surface area of ​​the leaked liquid during its flow, thereby preventing the leaked liquid from spreading over a large area and damaging the remaining parts where no leakage has occurred. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] Figure 1 It is a structural schematic diagram of an optimal embodiment of the present invention for improving the side wall of a subway station by arranging guide plates on the side wall; Figure 2 It is a structural schematic diagram of the guide plate of the present invention.

[0014] Figure numerals: 1. Cement mortar leveling layer; 2. Guide plate; 3. Water collecting trough; 4. Small water pump; 5. Rolled waterproofing layer; 6. Reinforced concrete side wall; 7. Horizontal groove; 8. Vertical guide trough. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0017] like Figure 1 and Figure 2 As shown, the present invention provides an embodiment of a method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall, comprising the following steps: S1, leveling layer construction, applying cement mortar on the outer side of the underground continuous wall for leveling, and forming a cement mortar leveling layer 1 after the cement mortar solidifies. By setting the leveling layer, the waterproof surface of the underground continuous wall is kept relatively flat, and liquid is prevented from being retained on the surface of the underground continuous wall during leakage, thereby keeping the underground continuous wall dry. At the same time, the leveling layer can also prevent the rough surface of the underground continuous wall from scratching the waterproof material laid subsequently, and make the underground continuous wall and the subsequent materials fit closely, reducing the gap between the materials; S2. Install the guide plate 2. After the construction of the cement mortar leveling layer 1 is completed, the guide plate 2 is installed on the surface of the cement mortar leveling layer 1. The surface of the guide plate 2 is arranged with multiple horizontal grooves 7. When the liquid generated by leakage flows to the guide plate 2, the liquid will flow downward along the surface of the guide plate 2. When the leaking liquid is small, since the water flow cannot pass through the guide plate 2, the horizontal grooves 7 on the guide plate 2 can retain a small amount of liquid generated by the leakage therein, thereby preventing the leaking liquid from flowing around and causing the leakage point to spread. When the leaking liquid is large, most of the liquid can flow along the horizontal grooves 7 on the surface of the guide plate 2 to the two sides of the guide plate 2 in a directional manner, so as to collect the leaking liquid in a centralized manner. At the same time, the multiple horizontal grooves 7 can also prevent the leaking liquid from flowing downward over a large area, thereby reducing the surface area of ​​the leaking liquid when it flows, thereby preventing the leaking liquid from spreading over a large area and damaging the remaining parts where no leakage occurs; S3, laying of the water collecting trough 3, laying of the water collecting trough 3 at the bottom of the guide plate 2, vertical guide grooves 8 are laid at both ends of the horizontal grooves 7 on the guide plate 2, and a plurality of the horizontal grooves 7 are connected to the water collecting trough 3 through the vertical guide grooves 8, the water collecting trough 3 is used to receive the water flowing down through the guide plate 2, and the water collecting trough 3 is connected to a small water pump 4, and a liquid level sensor can also be installed in the water collecting trough 3. When the leaked liquid is too much, the small water pump 4 is started to quickly discharge the liquid in the water collecting trough 3 into the sewer to prevent the leaked liquid from overflowing the water collecting trough 3; S4, waterproof layer construction, laying waterproof membrane outside the guide plate 2 to form a waterproof membrane 5, the waterproof membrane 5 is made of self-adhesive waterproof membrane, the self-adhesive waterproof membrane can be stably adhered to the other side of the guide plate 2, and form a double-layer waterproof system with the guide plate 2, that is, the waterproof membrane 5 prevents liquid from directly entering the subway station in the event of large-scale leakage. When the waterproof membrane is damaged, the liquid is blocked by the guide plate 2 again after passing through the waterproof membrane, and the liquid is collected and discharged into the sewer system to avoid large-scale diffusion of the leaked liquid.

[0018] On the other hand, a hydrophilic film is pasted on the surface of the guide plate 2. When the leaked liquid passes through the rolled waterproof layer 5 and contacts the hydrophilic film on the surface of the guide plate 2, the liquid can be quickly adsorbed onto the hydrophilic film and flow into the horizontal groove 7, preventing the leaked liquid from continuing to penetrate into the gap between the guide plate 2 and the rolled waterproof layer 5, thereby improving the service life of the rolled waterproof layer 5 and preventing the rolled waterproof layer 5 from falling off the surface of the guide plate 2.

[0019] The thickness of the guide plate 2 is less than the thickness of the waterproof roll layer 5, thereby reducing the thickness of the entire double-layer waterproof system, which is beneficial to reducing the space occupied during the construction of the subway station.

[0020] S5, side wall casting, digging a deep pit on the ground outside the waterproof membrane, laying a formwork in the deep pit and hoisting a steel cage, and then pouring concrete to form a waterproof reinforced concrete side wall 6. The bottom of the steel cage is bent to form an L-shaped structure to improve the stability of the waterproof reinforced concrete side wall 6. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A method for improving the anti-seepage performance of the side walls of subway stations by installing guide plates on the side walls. It is characterized in that The following steps are involved: S1, leveling layer construction, applying cement mortar on the outer side of the underground continuous wall for leveling, and forming a cement mortar leveling layer (1) after the cement mortar solidifies; S2, installing the guide plate (2), after the construction of the cement mortar leveling layer (1) is completed, installing the guide plate (2) on the surface of the cement mortar leveling layer (1); S3, laying a water collecting trough (3), laying a water collecting trough (3) at the bottom of the guide plate (2), the water collecting trough (3) being used to receive water flowing down through the guide plate (2), and connecting the water collecting trough (3) to a small water pump (4); S4, waterproof layer construction, laying waterproof roll material outside the guide plate (2) to form a waterproof roll material layer (5); S5, side wall casting, digging a deep pit on the ground outside the waterproof membrane, laying a formwork in the deep pit, hoisting a steel cage, and then pouring concrete to form a waterproof reinforced concrete side wall (6).

2. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 1, Features: In S2, a plurality of horizontal grooves (7) are arranged on the surface of the guide plate (2).

3. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 3, Features: In S3, vertical guide grooves (8) are also provided at both ends of the horizontal grooves (7) on the guide plate (2), and a plurality of the horizontal grooves (7) are connected to the water collecting trough (3) through the vertical guide grooves (8).

4. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 1, Features: In S4, the waterproof roll material (5) is a self-adhesive waterproof roll material.

5. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 1, Features: In S5, the bottom of the steel cage is bent to form an L-shaped structure.

6. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 2, Features: A hydrophilic film is adhered to the surface of the guide plate (2).

7. The method for improving the anti-seepage performance of the side wall of a subway station by arranging guide plates on the side wall as claimed in claim 1, Features: The thickness of the guide plate (2) is smaller than the thickness of the waterproofing roll layer (5).

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