A grouting expansion bag

Abstract

The utility model relates to tunnel construction technical field, and disclose a kind of grouting expansion bag, solved the problem of insufficient functionality of grouting expansion bag for engineering construction in the process of use, it includes check valve, the side fixed mounting of check valve has grouting fixed head, grouting fixed head is fixedly installed with the end of bag body away from check valve, the outside of bag body is equipped with heat shrink tube, the outside of bag body is fixedly connected with support framework, the end of bag body away from grouting fixed head is fixedly connected with guide fixed head, bag body includes shrinked outer layer, the side fixed connection of shrinked outer layer has anti-cut layer, the side fixed connection of anti-cut layer away from anti-cut outer layer has interception layer;The utility model, so that the functionality of grouting expansion bag for engineering construction in the process of use, the functionality of bag is improved, to facilitate better grouting expansion control operation, to facilitate better practicability.

Description

Technical Field

[0001] This utility model belongs to the field of engineering construction technology, specifically a grouting expansion bag. Background Technology

[0002] Tunnel construction refers to the general term for the construction methods, technologies, and management of tunnels and underground caverns. Its core is to form a passage structure that meets the design requirements underground through processes such as excavation, support, and lining, while ensuring construction safety and long-term stability. During the use of tunnels, gaps of about 15 centimeters will form between the tunnel segments and the rock strata, which will cause instability of the tunnel segments. Therefore, it is necessary to perform controlled grouting between the tunnel segments and the rock strata to partially eliminate the gaps and form support points. This requires the use of grouting expansion bags. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides a grouting expansion bag, which effectively solves the problem that insufficient testing measures are needed in the partially controllable grouting process in tunnel construction, making it impossible to better perform grouting support operations and thus hindering the achievement of better practicality.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grouting expansion bag, comprising a one-way valve, a grouting fixing head fixedly installed on one side of the one-way valve, a bag body fixedly installed at the end of the grouting fixing head away from the one-way valve, a heat shrink tube sleeved on the outside of the bag body, a support frame fixedly connected to the outside of the bag body, and a guide fixing head fixedly connected to the end of the bag body away from the grouting fixing head.

[0005] Preferably, the main body of the bag includes a shrinkable outer layer, a cut-resistant layer is fixedly connected to one side of the shrinkable outer layer, and a retaining layer is fixedly connected to the side of the cut-resistant layer away from the cut-resistant outer layer.

[0006] Preferably, the shrinkable outer layer is made of PE, the cut-resistant outer layer is made of ultra-high molecular weight polyethylene fiber, and the retaining layer is made of polytetrafluoroethylene microporous membrane.

[0007] Compared with the prior art, the beneficial effects of this utility model are: 1) During operation, the interaction of the one-way valve, grouting fixing head, bladder body, heat shrink tubing, support frame and guide fixing head improves the functionality of the grouting expansion bladder for tunnel construction, making it easier to perform grouting support operations and thus achieve better practicality. Attached Figure Description

[0008] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0009] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a grouting support bag according to the present invention; Figure 2 For the present utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the main structure of the bag of this utility model.

[0010] In the diagram: 1. One-way valve; 2. Grouting fixing head; 3. Bag body; 301. Shrink outer layer; 302. Cut-resistant layer; 303. Retention layer; 4. Heat shrink tubing; 5. Support frame; 6. Guide fixing head. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0012] Example 1, by Figure 1 , Figure 2 and Figure 3 The present invention relates to a grouting expansion bag, comprising a one-way valve 1, a grouting fixing head 2 fixedly installed on one side of the one-way valve 1, a bag body 3 fixedly installed at the end of the grouting fixing head 2 away from the one-way valve 1, a heat shrink tube 4 sleeved on the outside of the bag body 3, a support frame 5 fixedly connected to the outside of the bag body 3, and a guide fixing head 6 fixedly connected to the end of the bag body 3 away from the grouting fixing head 2. The main body 3 of the bag includes a shrinkable outer layer 301, a cut-resistant layer 302 is fixedly connected to one side of the shrinkable outer layer 301, and a retaining layer 303 is fixedly connected to the side of the cut-resistant layer 302 away from the shrinkable outer layer 301. The shrinkable outer layer 301 is made of PE, which enables the main body 3 of the bag to achieve a better shrinkage effect. The cut-resistant layer 302 is made of ultra-high molecular weight polyethylene film and adopts a warp and weft woven type, which can effectively resist mechanical damage during construction and prevent gravel or steel bars from tearing the bag. The retaining layer 303 is made of polytetrafluoroethylene microporous membrane, which can both allow water to pass through and retain cement particles.

[0013] In use, the bag body 3, composed of a shrinkable outer layer 301 made of PE, a cut-resistant layer 302 made of ultra-high molecular weight polyethylene film, and a retention layer 303 made of polytetrafluoroethylene microporous membrane, can improve the functionality of the bag body 3 and enable it to perform grouting support operations better.

[0014] Working principle: During operation, before the grout is injected, the main body 3 of the bladder is in a contracted state and is fixed by the heat shrink tubing 4 to ensure that it can pass smoothly through the 28mm valve hole and reach the target gap area. Then, one end of the guide fixing head 6 is inserted into the grouting position through the valve hole. After reaching the position, the one-way valve 1 is located inside the valve hole. Then, the grouting operation is performed into the bladder body 3 through the one-way valve 1 and the grouting fixing head 2. The grouting pressure gradually expands the bladder body 3, causing it to expand and fit the gap between the pipe segment and the rock mass, forming a stable support.

Claims

1. A grouting expansion bladder, comprising a one-way valve (1), characterized in that: A grouting fixing head (2) is fixedly installed on one side of the one-way valve (1). A bag body (3) is fixedly installed at the end of the grouting fixing head (2) away from the one-way valve (1). A heat shrink tube (4) is sleeved on the outside of the bag body (3). A support frame (5) is fixedly connected to the outside of the bag body (3). A guide fixing head (6) is fixedly connected to the end of the bag body (3) away from the grouting fixing head (2).

2. The grouting expansion bladder according to claim 1, characterized in that: The main body (3) of the bag includes a shrinkable outer layer (301), a cut-resistant layer (302) is fixedly connected to one side of the shrinkable outer layer (301), and a retaining layer (303) is fixedly connected to the side of the cut-resistant layer (302) away from the shrinkable outer layer (301).

3. The grouting expansion bladder according to claim 2, characterized in that: The shrinkable outer layer (301) is made of PE, which enables the main body of the bag (3) to achieve a better shrinkage effect. The anti-cut layer (302) is made of ultra-high molecular weight polyethylene film and adopts a warp and weft woven type, which can effectively resist mechanical damage during construction and prevent gravel or steel bars from tearing the bag.

4. The grouting expansion bladder according to claim 3, characterized in that: The retention layer (303) is made of polytetrafluoroethylene microporous membrane, which is both permeable to water and can retain cement particles.

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