Construction method of subway station main structure wall and enclosure structure

Abstract

The application provides a subway station main structure wall and enclosure construction method, uneven pits of the enclosure are found before pouring of the main structure wall, a grouting channel is arranged between the pits of the enclosure and a main structure steel formwork, after pouring of the main structure wall is completed and construction of the subway station is completed, unified grouting is carried out through the grouting channel, a gap between the enclosure and the main structure wall is filled, and leakage of the subway station structure is reduced. The subway station main structure wall and enclosure construction method actively grouts the gap through early-stage pre-buried channels, can fill the gap between the enclosure and the main structure wall, and effectively solves the leakage of the subway station structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of subway station construction, in particular to a subway station main structure wall and enclosure construction method. BACKGROUND

[0002] With the continuous expansion of urban rail transit scale, many cities across the country have opened subway stations. At present, after the completion of subway station construction, due to the unevenness of the enclosure structure, sometimes there are many pits and bumps on the enclosure structure, which leads to the existence of gaps between the enclosure structure and the main structure of the subway station, and the place is easy to form a gathering place of underground water, thereby causing the structure to leak water after the completion of the subway station. Especially in areas with rich underground confined water, after the pressure relief well is closed, the side wall of the lower structure is prone to a large amount of water leakage.

[0003] The traditional treatment method mainly includes needle injection at the leakage site and grouting after structure drilling, which is generally high in cost, poor in appearance, and also damages the wall structure. In terms of treatment, it is a passive treatment after leakage, and the treatment time is relatively long, which affects the subsequent process construction.

[0004] Therefore, it is necessary to improve the prior art to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a subway station main structure wall and enclosure construction method, which is arranged at the gap between the enclosure structure (ground connected wall) and the main structure of the subway station, and is used to solve the problem of water leakage at the gap.

[0006] The purpose of the present application is achieved by the following technical scheme:

[0007] A subway station main structure wall and enclosure construction method, comprising the following steps:

[0008] S1, before pouring the main structure wall, a first waterproof layer is laid on the enclosure structure;

[0009] S2, find the pits and bumps of the uneven enclosure structure;

[0010] S3, set a grouting channel between the pits and bumps of the enclosure structure and the main structure steel formwork, one end of the grouting channel is provided with an opening groove which penetrates the first waterproof layer laid on the surface of the enclosure structure and is placed on the pits and bumps of the enclosure structure; the other end abuts against the main structure wall steel formwork and is provided with an internal thread connected with a grouting connector;

[0011] S4, coat sealant around the connection between the pre-buried pipe and the first waterproof layer on the enclosure structure to prevent underground water from seeping into the pre-buried pipe from the connection between the pre-buried pipe and the first waterproof layer on the enclosure structure;

[0012] S5, after the sealant is applied, a second waterproof layer is pasted on the connecting part of the embedded pipe and the first waterproof layer on the enclosure structure through the waterproof sealant tape, the second waterproof layer is closely attached to the first waterproof layer, and the second waterproof layer is tightly clamped with the surface of the embedded pipe by using a metal hoop;

[0013] S6, after the embedded pipe is installed, the steel formwork of the enclosure structure and the main structure wall is the pouring area of the main structure wall, and the concrete is poured from the top of the pouring area, after the main structure wall is poured, the embedded pipe is left in the main structure wall without being taken out, and the steel formwork of the main structure wall is removed;

[0014] S7, after the steel formwork of the main structure wall is removed, the surface and the inside of the embedded pipe end are cleaned in time to ensure that the grouting joint can be tightly installed with the internal thread end of the embedded pipe, and the embedded pipe internal thread end is installed after cleaning, and the grouting is uniformly carried out after the main station is completed;

[0015] S8, when grouting, the blocking cap is unscrewed, the grouting joint is tightly installed with the embedded pipe, the grouting pipe is filled with concrete, the sealing material arranged at one end of the opening groove is broken by the concrete slurry, the concrete slurry is overflowed outward through the opening groove, and the uneven pits of the enclosure structure are filled; after the grouting filling is completed, the embedded pipe is left in the main structure wall.

[0016] In the step S5, an annular water stop plate is sleeved on the outer side of the middle part of the embedded pipe, and water stop glue is filled between the annular water stop plate and the embedded pipe to prevent underground water from penetrating from inside to outside through the embedded pipe.

[0017] The first waterproof layer and the second waterproof layer are both waterproof rolls.

[0018] The waterproof sealant tape is a double-sided butyl rubber waterproof sealant tape. Beneficial effects

[0019] The embedded pipe device of the application is fixed at one end of the pit of the enclosure structure and at the other end of the steel formwork of the main structure wall, the two ends are sealed by using sealing material, a water stop plate is fixedly arranged in the middle part of the embedded pipe by using water stop glue, underground water slurry is prevented from penetrating from inside to outside along the embedded pipe, the water stop effect is further strengthened, in addition, a waterproof roll is fixedly arranged at the connecting part of the embedded pipe and the enclosure structure; after the main structure wall is poured, the embedded pipe forms a grouting channel, the grouting is uniformly carried out after the subway station is built, the gap between the enclosure structure and the main structure wall is filled, and the leakage of the subway station structure is reduced. The embedded pipe device is simple and convenient to manufacture, can fill the gap between the enclosure structure and the main structure wall, and effectively solves the leakage of the subway station structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structural installation plan for the present application;

[0021] Figure 2 The three-dimensional schematic diagram of the embedded steel pipe of the present application;

[0022] Wherein, 1, embedded pipe; 2, opening groove; 3, internal thread; 4, water stop plate; 5, double-sided butyl rubber waterproof sealing adhesive tape; 6, waterproof roll material; 7, metal hoop; 8, water stop glue; 9, adhesive tape; 10, enclosure structure; 11, pothole; 12, waterproof layer; 13, main structure wall steel formwork. DETAILED DESCRIPTION

[0023] The features of the present application and other related features are further described in detail below with examples and with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art:

[0024] As shown in Figure 1 and Figure 2 , the grouting device between the main structure wall of the subway station and the enclosure structure 10 of the present application mainly includes: an embedded pipe 1, a water stop plate 4, a water stop glue 8, a double-sided butyl rubber waterproof sealing adhesive tape 5, a waterproof roll material 6, a metal hoop 7, and an adhesive tape 9.

[0025] Among them, the embedded pipe 1 is open at both ends and horizontally arranged, one end is provided with an opening groove 2, the other end is provided with an internal thread 3 connected with a grouting connector, the end provided with the opening groove 2 is placed on the pothole 11 of the enclosure structure 10, the end provided with the internal thread 3 abuts against the main structure wall steel formwork 13, the embedded pipe 1 is between the enclosure structure 10 and the main structure wall steel formwork 13, and is tightly pressed by the enclosure structure 10 and the main structure wall steel formwork 13;

[0026] Both ends of the embedded pipe 1 are sealed with sealing materials to prevent the concrete cement slurry from entering the embedded pipe 1 when pouring the main structure wall;

[0027] The water stop plate 4 is an annular steel plate, which is sleeved and fixed on the embedded pipe 1, mainly sleeved at the middle position of the embedded pipe 1, to prevent underground water from penetrating from inside to outside along the embedded pipe 1, thereby preventing the embedded pipe 1 from becoming a water leakage channel; to strengthen the water stop effect, the water stop glue 8 is provided at the connection between the water stop plate 4 and the embedded pipe 1; the connection between the water stop plate 4 and the embedded pipe 1 is a circular ring, and the water stop glue 8 is fully coated around the circular ring;

[0028] The waterproof roll material 6 is arranged around the connection between the embedded pipe 1 and the enclosure structure 10, and the waterproof roll material 6 extends outwardly to the enclosure structure 10 and the embedded pipe 1 respectively, one end of the extension to the enclosure structure 10 is sealed and bonded with the enclosure structure 10, and one end of the extension to the embedded pipe 1 is tightly attached to the surface of the steel embedded pipe 1.

[0029] As a further improvement of the present application, the opening groove 2 is annularly arranged at one end of the embedded pipe 1

[0030] As a further improvement of the present application, the sealing material is a sealing tape 9 or a sealing film.

[0031] As a further improvement of the present application, the embedded pipe 1 is made of steel.

[0032] As a further improvement of the present application, the waterproof roll 6 extends between one end of the enclosure 10 and the enclosure 10, and is sealed and bonded by using the double-sided butyl rubber waterproof sealing tape 5, and the waterproof roll 6 extends between one end on the embedded pipe 1 and the surface of the steel embedded pipe 1, and is fastened and connected by the metal hoop 7.

[0033] A grouting method for the gap between the main structure of a subway station and the enclosure 10, comprising the following steps:

[0034] S1, finding the more obvious uneven pits 11 on the enclosure 10, and placing the embedded pipe with the opening groove at one end on the pits 11, and placing the other end with the internal thread against the main structure wall steel formwork 13, and forming a main structure wall pouring area between the enclosure 10 and the main structure wall steel formwork 13, and sealing the two ends of the embedded pipe by using the sealing material;

[0035] S2, using a waterproof roll to waterproof and seal the connection between the embedded pipe and the enclosure 10, and extending the waterproof roll to one end of the enclosure 10 and sealing and bonding with the enclosure 10, and extending one end on the embedded pipe to tightly fit with the surface of the embedded pipe;

[0036] S3, the annular water stop plate is sleeved and fixed on the embedded pipe, and the water stop glue is arranged at the connection between the water stop plate and the embedded pipe, for preventing the groundwater from penetrating from inside to outside along the embedded pipe;

[0037] S4, pouring from top to bottom on the main structure wall pouring area, and removing the main structure wall steel formwork 13 after pouring is completed, and forming a grouting channel in the embedded pipe channel;

[0038] S5, grouting in the embedded pipe channel, and the grouting force exists in the embedded pipe channel during grouting, the grouting force breaks the sealing material at one end of the opening groove, so that the concrete overflows through the opening groove, thereby filling the pits 11 on the enclosure 10, and further preventing water seepage.

[0039] In the installation, a waterproof layer 12 (made of waterproof coiled material) is laid on the enclosure 10, and the uneven pits and depressions 11 of the enclosure 10 are found out. If the pits and depressions 11 are not treated, after the pouring of the main structure wall, the enclosure 10 with pits and depressions 11 is prone to form gaps and cavities between the main structure wall, which is prone to form a gathering place of underground water, thereby causing the structure to leak water after the completion of the subway station. Therefore, the uneven pits and depressions 11 of the enclosure 10 need to be treated.

[0040] One end of the embedded pipe 1 provided with the opening groove 2 is placed against the uneven pits and depressions 11 of the enclosure 10. The purpose of providing the opening groove 2 is to allow the concrete to overflow outward through the opening groove 2 when grouting the embedded pipe 1, and to fill the uneven pits and depressions 11 of the enclosure 10 until the pits and depressions 11 are filled, thereby ensuring that the pits and depressions 11 do not form a gathering area of underground water.

[0041] The embedded pipe 1 needs to penetrate the waterproof layer 12 (made of waterproof coiled material) laid on the surface of the enclosure 10, that is, the waterproof layer 12 of the uneven pits and depressions 11 of the enclosure 10 and the waterproof layer 12 (made of waterproof coiled material) of the remaining part are penetrated by the embedded pipe 1 and are divided into two parts.

[0042] Then a circle of sealant is applied around the connection between the embedded pipe 1 and the waterproof layer 12 on the enclosure 10. The main function of applying the sealant is to prevent underground water from seeping into the embedded pipe 1 from the connection between the embedded pipe 1 and the waterproof layer 12 on the enclosure 10.

[0043] After the sealant is applied, a circle of waterproof coiled material 6 is attached to the connection between the embedded pipe 1 and the waterproof layer 12 on the enclosure 10. One end of the waterproof coiled material 6 is tightly attached to the waterproof layer 12 on the enclosure 10 (diaphragm wall) using a double-sided butyl rubber waterproof sealant tape 5, and the other end is tightly attached to the surface of the embedded pipe 1 using a metal hoop 7.

[0044] The embedded pipe 1 is horizontally arranged during installation, and one end provided with an internal thread 3 is stably and firmly placed on the main structure wall steel formwork 13. Both ends of the embedded pipe 1 must be tightly attached to the pits and depressions 11 of the enclosure 10 (diaphragm wall) and the main structure wall steel formwork 13, respectively. After installation, both ends of the embedded pipe 1 are sealed using a sealing material to prevent cement slurry from entering during the pouring of the main structure wall concrete.

[0045] The use of waterproof glue 8 to seal and attach the annular waterproof plate 4 at the middle position of the embedded pipe 1 is also to prevent the embedded pipe 1 from becoming a water leakage channel and to prevent underground water from permeating outward along the embedded pipe 1.

[0046] The thickness of the main structural wall is usually not fixed, so the length of the embedded pipe 1 is set differently depending on the wall thickness.

[0047] In addition, depending on the unevenness of the enclosure structure 10, the pre-embedded pipe 1 needs to be processed with a certain margin. The length of each pre-embedded pipe 1 should be determined according to the corresponding installation position to ensure that the length is just enough.

[0048] like Figure 1 As shown, after the pre-embedded pipe 1 is installed, the area between the enclosure structure 10 and the steel formwork of the main structural wall is the pouring area of ​​the main structural wall. Concrete is poured from the top of the pouring area downwards. After the main structural wall is poured, the pre-embedded pipe 1 remains inside the main structural wall and is not removed. Then the steel formwork of the main structural wall is removed.

[0049] After the steel formwork of the main structural wall is removed, the surface and interior of the end of the embedded pipe 1 should be cleaned in a timely manner to ensure that the grouting joint can be smoothly fastened to the end of the embedded pipe 1 with the internal thread 3. After cleaning, a sealing cap should be installed on the end of the embedded pipe 1 with the internal thread 3, and grouting should be carried out uniformly after the main station is completed.

[0050] During grouting, unscrew the sealing cap and tighten the grouting joint to the end of the pre-embedded pipe 1 with the internal thread 3. Grout and fill the pre-embedded pipe with concrete. Due to the large grouting force during grouting, the sealing material at one end of the opening groove 2 can be broken. The concrete overflows outward through the opening groove 2 and fills the uneven pits 11 of the retaining structure 10. Therefore, the concrete can tightly fill the pits 11 of the retaining structure 10, preventing the area from becoming a groundwater accumulation area and thus preventing water seepage.

[0051] After the grouting and filling are completed, the pre-embedded pipe 1 remains inside the main structural wall.

[0052] This pre-embedded pipe device is simple to manufacture and easy to use. The pre-embedded pipe 1 and its supporting devices are installed in the pit 11 of the retaining structure 10 and on the steel formwork of the main structural wall. After the main structural wall is poured, the pre-embedded pipe 1 forms a grouting channel. Then, after the station is completed, unified grouting is carried out to fill the gap between the retaining structure 10 and the main structural wall, reducing the leakage of groundwater in the subway station structure.

[0053] The embodiments described in this invention are for illustrative purposes only and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutions that can be conceived by those skilled in the art are all within the protection scope of this invention.

Claims

1. A construction method of a subway station main structure wall and an enclosure, characterized by, Includes the following steps: S1. Before pouring the main structural wall, lay a first waterproof layer on the enclosure structure; S2. Locate any uneven areas or pits in the enclosure structure; S3. A grouting channel is set between the pit and depression of the enclosure structure and the steel formwork of the main structure. One end of the grouting channel is provided with an opening groove that penetrates the first waterproof layer laid on the surface of the enclosure structure and rests on the pit of the enclosure structure. The other end of the channel abuts against the steel formwork of the main structure wall and is provided with an internal thread for connection with the grouting joint. S4. Apply sealant around the connection between the pre-embedded pipe (1) and the first waterproof layer on the retaining structure to prevent groundwater from seeping into the pre-embedded pipe (1) from the connection between the pre-embedded pipe (1) and the first waterproof layer on the retaining structure. S5. After applying the sealant, a second waterproof layer is applied to the connection between the embedded pipe (1) and the first waterproof layer on the enclosure structure using waterproof sealant tape. The second waterproof layer is tightly attached to the first waterproof layer, and the second waterproof layer is tightened to the surface of the embedded pipe (1) using a metal hoop (7). S6. After the pre-embedded pipe (1) is installed, the area between the enclosure structure and the steel formwork of the main structure wall is the pouring area of ​​the main structure wall. Concrete is poured from the top of the pouring area down. After the main structure wall is poured, the pre-embedded pipe (1) is left in the main structure wall and not removed. The steel formwork of the main structure wall is removed. S7. After the steel formwork of the main structural wall is removed, the surface and interior of the end of the embedded pipe (1) are cleaned in time to ensure that the grouting joint can be successfully installed with the internal thread end of the embedded pipe (1). After cleaning, the sealing cap is installed on the internal thread end of the embedded pipe (1). Grouting is carried out uniformly after the main station is completed. S8. During grouting, unscrew the sealing cap and tighten the grouting joint to the end of the embedded pipe (1) with internal thread. Inject grout into the reserved pipe to fill concrete. The concrete slurry breaks through the sealing material at one end of the opening groove (2). The concrete slurry overflows outward through the opening groove (2) and fills the uneven pits and depressions of the retaining structure. After the grouting is completed, the embedded pipe (1) remains in the main structure wall. In step S5, an annular waterstop plate is fitted on the outer side of the middle part of the pre-embedded pipe, and waterstop glue is filled between the annular waterstop plate and the pre-embedded pipe to prevent groundwater from seeping from the inside to the outside through the pre-embedded pipe. Both the first and second waterproof layers are waterproof membrane rolls; The waterproof sealant tape is a double-sided butyl rubber waterproof sealant tape.

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