Water stop structure of pipe piece grouting hole

Abstract

The utility model discloses a water stop structure of a pipe piece grouting hole, which comprises a pipe piece body, cement grout is poured and filled in a wall cavity of the pipe piece body, grouting holes are arranged on one side of the pipe piece body at equal intervals, and water-swelling water stop strips and micro-swelling cement are respectively arranged in the grouting holes of the pipe piece body. According to the pipe piece, rapid and reliable hole sealing and water plugging can be achieved, then the sealing plug is screwed and fixed in the inner threaded pipe, the sealing performance of the plugging structure is further improved through the arrangement of the sealing plug, and on the other hand, the overall impression of the pipe piece body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe segments, in particular to a water stop structure of a grouting hole of a pipe segment. Background Art

[0002] More and more TBMs are being used in hard rock, but it is common to use pea gravel and self-mixing slurry. When grouting the shield tunnel structure behind the wall, the grouting hole needs to be drilled and filled behind the wall. The cement slurry in the grouting hole will shrink and ooze water, forming a cement slurry with a diameter smaller than the grouting hole. The cement slurry has no impermeability grade, so a water seepage channel will be formed in the grouting hole, causing water seepage. In addition, the cement slurry is not dense, and the compressive strength is much lower than that of the shield segment. It has no impermeability grade. Under the water-rich stratum, the grouting hole has become the weakest part of the shield tunnel. When there is water leakage from the grouting hole into the tunnel, it is difficult to seal it tightly.

[0003] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0004] In view of the problems in the related technology, the utility model proposes a water-stop structure for the grouting holes of the pipe segment to overcome the above-mentioned technical problems existing in the existing related technology.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] A water stop structure for grouting holes of a pipe segment comprises a pipe segment body, a wall cavity of the pipe segment body is poured and filled with cement slurry, and grouting holes are equidistantly arranged on one side of the pipe segment body.

[0007] Preferably, a straight pipe is fixedly mounted on the inner wall of the grouting hole, and the cement slurry is filled in the grouting hole and the straight pipe.

[0008] Preferably, the outer end of the straight pipe is fixedly connected to an internally threaded pipe, the internally threaded pipe is fixedly connected to the inner wall of the grouting hole, and the inner end of the internally threaded pipe is fixedly connected to the outer end of the straight pipe.

[0009] Preferably, the inner port of the internal threaded pipe is provided with a water-swellable waterstop strip, and the rear side of the water-swellable waterstop strip is fixedly connected to the cement slurry.

[0010] Preferably, the middle part of the inner cavity of the internal threaded tube is filled with micro-expansive cement, and the water-swellable waterstop strip is arranged between the cement slurry and the micro-expansive cement.

[0011] Preferably, a sealing plug is embedded in the outer end of the grouting hole, a threaded groove is provided on the outer wall of the sealing plug, the sealing plug is threadedly connected with the inner wall of the internal threaded pipe through the threaded groove, a sealing ring is fixed on the outer side of the sealing plug, and the sealing ring is fixed in contact with the inner wall of the internal threaded pipe port.

[0012] The beneficial effects of the utility model are as follows: water-expanding waterstop strips and micro-expanding cement are respectively arranged inside the glue injection holes of the segment body, and the performance of the expandable material is utilized to achieve rapid and reliable hole sealing and water blocking, and then the sealing plug is screwed and fixed in the internal threaded pipe. The setting of the sealing plug further improves the sealing performance of the sealing structure, and on the other hand, it can also improve the overall appearance of the segment body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of a water stop structure of a grouting hole of a pipe segment according to an embodiment of the utility model;

[0015] Figure 2 The utility model is a schematic cross-sectional view of a pipe segment of a water-stopping structure of a pipe segment grouting hole according to an embodiment of the utility model.

[0016] In the figure:

[0017] 1. Segment body; 2. Cement slurry; 3. Grouting hole; 4. Straight pipe; 5. Internally threaded pipe; 6. Water-expanding waterstop strip; 7. Micro-expanding cement; 8. Sealing plug; 9. Sealing ring. DETAILED DESCRIPTION

[0018] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] According to an embodiment of the utility model, a water-stopping structure for a grouting hole of a pipe segment is provided.

[0020] like Figure 1-Figure 2As shown, a water-stopping structure for grouting holes of a segment according to an embodiment of the utility model comprises a segment body 1, a wall cavity of the segment body 1 is poured and filled with cement slurry 2, and grouting holes 3 are equidistantly arranged on one side of the segment body 1.

[0021] Specifically, a straight pipe 4 is fixedly mounted on the inner wall of the grouting hole 3, and the cement slurry 2 is filled in the grouting hole 3 and the straight pipe 4. An internal threaded pipe 5 is fixedly connected to the outer end of the straight pipe 4. The internal threaded pipe 5 is fixedly connected to the inner wall of the grouting hole 3, and the inner end of the internal threaded pipe 5 is fixedly connected to the outer end of the straight pipe 4. A water-swelling waterstop strip 6 is provided at the inner end of the internal threaded pipe 5. The rear side of the water-swelling waterstop strip 6 is fixedly connected to the cement slurry 2. The middle part of the inner cavity of the internal threaded pipe 5 is filled with micro-expanding cement 7. The water-swelling waterstop strip 6 is arranged between the cement slurry 2 and the micro-expanding cement 7. A sealing plug 8 is embedded in the outer end of the grouting hole 3, and a threaded groove is provided on the outer wall of the sealing plug 8. The sealing plug 8 is threadedly connected to the inner wall of the internal threaded tube 5 through a threaded groove. A sealing ring 9 is fixed on the outside of the sealing plug 8. The sealing ring 9 is fixed in contact with the inner wall of the port of the internal threaded tube 5. By arranging a straight tube 4, a water-swelling waterstop strip 6 and a micro-expanding cement 7, water-swelling waterstop strips 6 and micro-expanding cement 7 are respectively arranged inside the injection hole of the segment body 1. By utilizing the performance of the expansion material, rapid and reliable sealing and water blocking can be achieved. Then the sealing plug 8 is screwed and fixed in the internal threaded tube 5. The arrangement of the sealing plug 8 further improves the sealing performance of the sealing structure. On the other hand, it can also improve the overall visual quality of the segment body 1.

[0022] In summary, with the help of the above-mentioned technical solution of the utility model, when this device is in use, the cement slurry 2 is filled behind the wall of the pipe segment body 1, and the ball valve is removed after the cement slurry 2 solidifies. The cement slurry 2 in the grouting hole 3 is chiseled out to the straight pipe 4. After being rinsed clean, it is kept moist, and a water-swelling waterstop strip 6 is installed. Finally, it is filled with micro-expanding cement 7, and then the sealing plug 8 is screwed and fixed in the internal threaded tube 5 arranged at the outer end of the grouting hole 3.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water stop structure for a grouting hole of a pipe segment, comprising a pipe segment body (1), characterized in that: The wall cavity of the pipe segment body (1) is poured and filled with cement slurry (2); grouting holes (3) are equidistantly arranged on one side of the pipe segment body (1); a straight pipe (4) is fixedly sleeved on the inner wall of the grouting hole (3); the cement slurry (2) is filled in the grouting hole (3) and the inside of the straight pipe (4); an inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner threaded pipe (5) is fixedly connected to the inner wall of the grouting hole (3); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); a water-swelling water stop strip (6) is provided at the inner end of the inner threaded pipe (5); the water-swelling water stop strip (6 ... the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe (4); the inner end of the inner threaded pipe (5) is fixedly connected to the outer end of the straight pipe ( The rear side of the water stop strip (6) is fixedly connected to the cement slurry (2), the middle part of the inner cavity of the internal threaded tube (5) is filled with micro-expansive cement (7), the water-expandable water stop strip (6) is arranged between the cement slurry (2) and the micro-expansive cement (7), the outer end of the grouting hole (3) is embedded with a sealing plug (8), the outer wall of the sealing plug (8) is provided with a thread groove, the sealing plug (8) is threadedly connected with the inner wall of the internal threaded tube (5) through the thread groove, and a sealing ring (9) is fixedly sleeved on the outer side of the sealing plug (8), and the sealing ring (9) is fixedly abutted against the inner wall of the port of the internal threaded tube (5).

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