Novel anti-sedimentation grouting structure

Abstract

The utility model relates to a grouting structure and belongs to the technical field of engineering construction, in particular to a novel anti-sedimentation grouting structure which comprises a pipe piece, an embedded pipe and a grouting pipe body, the embedded pipe is arranged in the pipe piece, the grouting pipe body is located in the embedded pipe, the grouting pipe body comprises a steel pipe and an elastic film bag, and the elastic film bag is arranged in the steel pipe. An inner cavity of the elastic film bag is connected with the bottom of the steel pipe; when TBM tunnel normal-pressure grouting is carried out, it can be guaranteed that grout is not lost, the shape of the filled elastic film bag is not changed, and the pipe piece is supported, so that sedimentation of the pipe piece is reduced and prevented, the grouting effect is guaranteed, and the problem that when an existing grouting pipe is used for grouting, the pipe piece is prone to sedimentation due to grout loss is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering construction, in particular to a novel anti-settling grouting structure. Background Art

[0002] In recent years, my country's subway tunnel projects have been put into construction one after another. During excavation work, shield machines / TBMs are used for excavation. After the shield segments are assembled, grouting is carried out on the outside of the segments. In order to ensure the effect of grouting, secondary grouting operations are required on the segments.

[0003] In the prior art, since the excavation surface is generally larger than the outer diameter of the segment, a grouting pipe is generally used to fill the gap between the segment and the stratum during grouting. However, under normal pressure during TBM excavation, the use of conventional grouting pipes will cause a portion of the slurry to be lost, causing the segment to settle and affecting the construction effect. Therefore, a new anti-settlement grouting structure is proposed to solve the above problem. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a new anti-settling grouting structure, which can ensure that the slurry does not lose and the shape of the filled elastic membrane bag remains unchanged during normal pressure grouting, thereby supporting the pipe segment, thereby reducing and preventing the pipe segment from settling and ensuring the grouting effect.

[0005] The technical solution for achieving the purpose of the utility model is: a new anti-settling grouting structure, including a pipe segment, an embedded pipe and a grouting pipe body, the embedded pipe is arranged in the pipe segment, the grouting pipe body is located in the embedded pipe, the grouting pipe body includes a steel pipe and an elastic membrane bag, and the inner cavity of the elastic membrane bag is connected to the bottom of the steel pipe.

[0006] In some embodiments, the steel pipe includes a main pipe, the surface of which is respectively provided with a membrane bag anti-detachment thread and a pre-buried pipe connecting thread, the elastic membrane bag is connected to the main pipe via the membrane bag anti-detachment thread, and the main pipe is connected to the pre-buried pipe thread via the pre-buried pipe connecting thread.

[0007] In some embodiments, a fixing ring is disposed at one end of the main pipe, and a grouting pump connecting thread is disposed at one side of the fixing ring.

[0008] Compared with the prior art, the utility model has the following significant advantages:

[0009] The utility model connects a grouting pump in the tunnel and an elastic membrane bag at the end of the steel pipe by adapting to the steel pipe pre-buried in the pipeline of the pipe segment. The grouting pump fills the granular stone into the membrane bag through the steel pipe to expand the membrane bag. Relying on the rapid solidification performance of the double liquid slurry, after the membrane bag is separated from the grouting pipe, it can ensure that the slurry does not leak and the shape of the filled elastic membrane bag remains unchanged, thereby supporting the pipe segment, thereby reducing and preventing the settlement of the pipe segment.

[0010] The invention solves the problem that the existing grouting pipe is prone to the settlement of the pipe segments due to the loss of slurry during the normal pressure grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 It is a schematic diagram of the main structure provided in one embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the steel pipe structure provided in one embodiment of the utility model;

[0014] Figure 3 It is a schematic structural diagram of an elastic membrane bag (filled with slurry) provided in one embodiment of the utility model.

[0015] Description of reference numerals:

[0016] 1. Steel pipe; 2. Elastic membrane bag; 11. Membrane bag anti-slip thread; 12. Main pipe; 13. Pre-buried pipe connecting thread; 14. Fixing ring; 15. Grouting pump connecting thread. DETAILED DESCRIPTION

[0017] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model provides a novel anti-settling grouting structure through improvement. The technical solution of the utility model is:

[0019] like Figure 1 As shown, a new anti-settlement grouting structure includes a pipe segment, an embedded pipe and a grouting pipe body. The embedded pipe is arranged in the pipe segment. The inside of the embedded pipe is provided with a thread compatible with the grouting pipe body. The grouting pipe body is located in the embedded pipe. The grouting pipe body includes a steel pipe 1 and an elastic film bag 2. The inner cavity of the elastic film bag 2 is connected to the bottom of the steel pipe 1. The elastic film bag 2 itself has high elasticity and good deformation performance. The steel pipe 1 is located in the embedded pipe.

[0020] like Figure 2 and 3As shown, in one embodiment, the steel pipe 1 includes a main pipe 12, and the surface of the main pipe 12 is respectively provided with a film bag anti-detachment thread 11 and a pre-buried pipe connecting thread 13. The elastic film bag 2 is connected to the main pipe 12 through the film bag anti-detachment thread 11. The elastic film bag 2 is connected to the bottom of the main pipe 12 by relying on the shrinkage of its own film bag mouth, which is more like a sleeve. The film bag anti-detachment thread 11 can prevent the elastic film bag 2 from falling off to a certain extent, and the main pipe 12 is connected to the pre-buried pipe thread through the pre-buried pipe connecting thread 13.

[0021] A fixing ring 14 is provided at one end of the main pipe 12, and a grouting pump connecting thread 15 is provided on one side of the fixing ring 14. The grouting pump is connected from the outside through the grouting pump connecting thread 15. The entire grouting pipe body is hollow and interconnected to ensure that the slurry can flow into the elastic membrane bag 2.

[0022] The specific working method is: when the new anti-settling grouting structure is used, the embedded pipe is embedded in the pipe segment, the grouting pipe body is extended into the embedded pipe, and is fixed in the embedded pipe through the embedded pipe connecting thread 13 until the fixing ring 14 is stuck in the groove of the pipe segment, and is connected and fixed to the grouting pump through the grouting pump connecting thread 15. The elastic membrane bag 2 wraps the membrane bag anti-detachment thread 11 through its own elasticity, and is received into the steel pipe main pipe 12. When the grouting pump starts grouting, the slurry (double liquid slurry) enters the elastic membrane bag 2 through the steel pipe 1, gradually filling the elastic membrane bag 2. When the slurry is filled to the point where it can no longer be filled, the steel pipe 1 is pulled out. At this time, due to the rapid solidification performance of the double liquid slurry, after the elastic membrane bag 2 is separated from the steel pipe 1, it can be ensured that the slurry is not lost and the filled elastic membrane bag 2 remains in shape, thereby supporting the pipe segment 2, thereby reducing and preventing the settlement of the pipe segment 2.

[0023] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A new type of anti-settling grouting structure, comprising a pipe segment, a pre-buried pipe and a grouting pipe body, characterized in that: The embedded pipe is arranged in the pipe segment, the grouting pipe body is located in the embedded pipe, the grouting pipe body comprises a steel pipe (1) and an elastic film bag (2), and the inner cavity of the elastic film bag (2) is connected to the bottom of the steel pipe (1).

2. A novel anti-settling grouting structure according to claim 1, characterized in that: The steel pipe (1) comprises a main pipe (12), the surface of which is provided with a film bag anti-detachment thread (11) and a pre-buried pipe connecting thread (13), the elastic film bag (2) is connected to the main pipe (12) via the film bag anti-detachment thread (11), and the main pipe (12) is threadedly connected to the pre-buried pipe (4) via the pre-buried pipe connecting thread (13).

3. A novel anti-settling grouting structure according to claim 2, characterized in that: A fixing ring (14) is provided at one end of the main pipe (12), and a grouting pump connecting thread (15) is provided at one side of the fixing ring (14).

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