A method for preventing water seepage disease of subway tunnel wall back grouting

Abstract

The present application belongs to the technical field of tunnel grouting, and discloses a subway tunnel wall post-grouting method for preventing water seepage diseases, which comprises a tunnel inner wall, wherein the tunnel inner wall is provided with segments, the segments are arranged along the circumference of the tunnel inner wall, the segments are provided with longitudinal through holes, the inner wall of the segments is provided with small bosses, the small bosses are provided with small openings, the inside of the segments is coated with a reinforcing gel and a lubricant, the segment through holes are used in cooperation with a section pipe, the section pipe is composed of a section pipe head at the front end and a connecting pipe in the middle, the connecting pipe is connected with the section pipe head through threads, the front end of the section pipe head is provided with an anti-backflow device, and the rear end of the connecting pipe is connected with a ball valve. The segments are provided with longitudinal through holes, the inner wall of the segments is provided with small bosses, the small bosses are provided with small openings, the sealing liquid can be injected into the deep part of the segments, the sealing liquid can be accurately distributed to the outside of the segments in different situations through the small openings, a protective layer is formed outside the segments, the penetration of groundwater to the segments is blocked, the material is less used, and the effect is obvious.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel grouting, and particularly relates to a subway tunnel wall back grouting method for preventing water seepage diseases. BACKGROUND

[0002] At present, due to the development of science and technology, subways are increasingly popular in cities. In some cities, due to crust movement and large-scale land reform movement, the ground is relatively soft. Soft soil foundation is a rheological weak stratum with high water content, high void ratio, high sensitivity and low strength. With long-time subway operation, uneven differential settlement exists in the overall settlement of the operation tunnel. Uneven settlement is easy to cause water seepage in the longitudinal and ring joints of the tunnel segment. The increase in water seepage diseases aggravates the development of uneven settlement diseases of the tunnel, especially the water seepage in the ring and longitudinal joints of the standard block and the arch bottom block, which also causes gaps at the connection between the track bed and the segment casting. At present, the treatment of water seepage diseases in the standard block and the arch bottom block of the segment mainly adopts wall back injection of polyurethane grout. The polyurethane material expands when it comes into contact with water, and the gap on the water surface of the segment is filled, a protective layer is formed outside the segment, and the penetration of groundwater into the segment is blocked. However, this method consumes a large amount of materials, and it is difficult to control the trend of the wall back protective layer. Water seepage diseases cannot be completely removed, and the disease treatment effect is not good.

[0003] Through the above analysis, the problems and defects of the prior art are:

[0004] A protective layer is formed outside the segment to block the penetration of groundwater into the segment. However, this method consumes a large amount of materials, and it is difficult to control the trend of the wall back protective layer. Water seepage diseases cannot be completely removed, and the disease treatment effect is not good. SUMMARY

[0005] In view of the problems existing in the prior art, the present application provides a subway tunnel wall back grouting method for preventing water seepage diseases.

[0006] The present application is implemented as follows: a subway tunnel wall back grouting method for preventing water seepage diseases is provided, which comprises:

[0007] A tunnel inner wall;

[0008] The tunnel inner wall is provided with a segment, the segment is arranged along the circumference of the tunnel inner wall, the segment is provided with a longitudinal through hole, the inner wall of the segment is provided with a small boss, the small boss is provided with a small opening, the inside of the segment is coated with a bonded rebar gel and a lubricant, the segment through hole is used in cooperation with a section pipe, the section pipe is composed of a section pipe head at the front end and a connecting pipe in the middle, the connecting pipe is connected with the section pipe head through threads, the front end of the section pipe head is provided with an anti-backflow device, and the rear end of the connecting pipe is connected with a ball valve.

[0009] Further, the small opening is in a funnel-shaped structure.

[0010] Further, the anti-backflow device has an anti-backflow plate and a hinge, and the anti-backflow plate is fixedly connected with the connecting pipe through the hinge.

[0011] Further, a sealing washer is arranged between the pipe piece and the pipe joint.

[0012] Further, the sealing cover is a screw cover, and the plug is installed on the connecting pipe by using an internal hex sleeve wrench, so that the operation is convenient.

[0013] Further, the sealing step specifically comprises:

[0014] Step one: cleaning the longitudinal through hole and the small opening on the pipe piece;

[0015] Step two: connecting the pipe joint and the connecting pipe and then deeply inserting them into the through hole of the pipe piece, pouring the anchoring adhesive into the through hole after the deep insertion;

[0016] Step three: after the grouting of step two is completed and a set time is passed, the pipe joint and the connecting pipe are pulled out, the sealing adhesive is inserted into the through hole, and one-time sealing is realized;

[0017] Step four: after one month of grouting, the sealing adhesive is removed, the epoxy resin sealing adhesive is injected, and the pipe piece is sealed by the sealing cover.

[0018] In combination with all the technical solutions above, the advantages and positive effects of the present application are as follows:

[0019] The present application has the longitudinal through hole arranged on the pipe piece, the small boss arranged on the inner wall of the pipe piece, the small opening arranged on the small boss, the sealing liquid injected into the deep part of the pipe piece through the small opening, the sealing liquid accurately distributed to the outside of the pipe piece in different situations through the small opening, the protective layer formed outside the pipe piece, the penetration of the groundwater to the pipe piece blocked, the material used less, and the effect obvious. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the subway tunnel wall back grouting structure provided by the embodiment of the present application.

[0021] Figure 2 is a flow chart of the subway tunnel wall back grouting method for preventing water seepage diseases provided by the embodiment of the present application.

[0022] Figure 3 is a schematic diagram of the anti-backflow device structure provided by the embodiment of the present application.

[0023] In the figure: 1, pipe piece; 2, small opening; 3, through hole; 4, connecting pipe; 5, hinge; 6, pipe head; 7, anti-backflow plate. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0025] In view of the problems in the prior art, the present application provides a subway tunnel wall post-grouting method for preventing water seepage diseases.

[0026] As shown in Figure 1 and Figure 3 The pipe piece 1 provided by the embodiment of the present application is provided with a longitudinal through hole 3, the inner wall of the pipe piece 1 is provided with a small boss, the small boss is provided with a small opening 2, and the inside of the pipe piece 1 is coated with a bonded rebar gel and a lubricant. The joint pipe is composed of a joint pipe head 6 at the front end and a connecting pipe 4 in the middle, the connecting pipe 4 is connected with the joint pipe head 6 through threads, the front end of the joint pipe head 6 is provided with an anti-backflow device, and the rear end of the connecting pipe is connected with a ball valve. The anti-backflow device is composed of an anti-backflow plate 7 and a hinge 5, and the anti-backflow plate 7 is fixedly connected with the connecting pipe 7 through the hinge 5.

[0027] Principle of the present application:

[0028] As shown in Figure 2 The present application is provided by the embodiment

[0029] S201: cleaning the longitudinal through hole and the circular small opening on the pipe piece;

[0030] S202: connecting the pipe joint and the connecting pipe and then deeply inserting them into the through hole of the pipe piece, pouring in the anchoring adhesive after deeply inserting into the through hole;

[0031] S203: after the second grouting step is completed and a set time is passed, the pipe joint and the connecting pipe are pulled out, the injection sealing glue is inserted into the through hole, and one-time sealing is realized;

[0032] S204: after the grouting is completed for one month, the injection sealing glue is removed, the epoxy resin sealing glue is injected, and the outside is sealed with the pipe piece through the sealing cover.

[0033] In the description of the present application, unless otherwise specified, the meaning of “a plurality of” is two or more; the orientations or positional relationships indicated by the terms “upper”, “lower”, “left”, “right”, “inner”, “outer”, “front end”, “rear end”, “head”, “tail” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting or implying the present application. In addition, the terms “first”, “second”, “third” and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0034] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any modification, equivalent replacement and improvement within the technical range disclosed by the present application and within the spirit and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for preventing water seepage disease in a subway tunnel wall by post-grouting, characterized by, The subway tunnel wall post-grouting method for preventing water seepage diseases is provided with: A tunnel inner wall; The tunnel inner wall is provided with segments, the segments are arranged along the circumference of the tunnel inner wall, the segments are provided with longitudinal through holes, the inner wall of the segments is provided with small bosses, the small bosses are provided with small openings, the inside of the segments is coated with anchoring gel and lubricant, the segment through holes are used in cooperation with section tubes, the section tubes are composed of front tube joints and middle connecting tubes, the connecting tubes are connected with the tube joints through threads, the front end of the tube joint is provided with an anti-backflow device, and the rear end of the connecting tube is connected with a ball valve; The small opening is a funnel-shaped structure; The anti-backflow device is composed of an anti-backflow plate and a hinge, and the anti-backflow plate is fixedly connected with the connecting tube through the hinge; A sealing washer is arranged between the segment and the tube joint; The sealing cover is a screw cover, a hexagonal sleeve wrench is used to install the plug on the connecting tube, and the operation is convenient.

2. The method for preventing seepage water disease of a subway tunnel wall by post-grouting according to claim 1, wherein, The closing step is specifically: Step one: cleaning the longitudinal through holes and the circular small openings on the segments; Step two: connecting the tube joint and the connecting tube and then deeply inserting them into the through hole of the segment, pouring anchoring adhesive into the through hole after deep insertion, and then inserting a sealing gel into the through hole to realize one-time closing after a set time; Step three: removing the sealing gel after one month of grouting and injecting epoxy resin sealing gel, and sealing the outside of the segment through the sealing cover. ​

Images