Structure for preventing anchor sealing concrete from being broken

Abstract

The utility model discloses a structure for preventing anchor sealing concrete from being broken, which comprises flexible waterproof cloth and a binding belt, the flexible waterproof cloth is tightly attached and wrapped on an anchor sealing concrete entity, the edge of the flexible waterproof cloth is fixed on the outer side face of an anchorage device through an adhesive tape in an adhesive mode, and the flexible waterproof cloth is bound and fixed through the binding belt. The flexible waterproof cloth is formed by compounding a plastic film and inelastic fiber cloth, and the plastic film is located on the inner side of the flexible waterproof cloth. The flexible waterproof cloth is used for forming tight constraint and sealing on the surface of an anchor sealing concrete entity, and the anchor sealing concrete can be effectively prevented from being cracked and broken when the flexible waterproof cloth is applied before grouting; and when being applied in the grouting process, the grouting material can be used for reinforcing cracked anchor sealing concrete. In the grouting process, the sealing surface formed by the flexible waterproof cloth can prevent grouting slurry from overflowing, and the grouting pressure in the pipeline is kept unchanged. And the structure is simple, the construction is convenient and fast, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a structure for preventing and controlling anchor seal concrete from breaking. Background Art

[0002] Precast beams have the advantages of high construction standardization, easy control of quality and construction period, and are widely used in bridge projects. At present, most precast beams are post-tensioned prestressed precast beams; after the prestressed tendons are tensioned, fine stone concrete is poured at the end of the anchor to seal the anchor, so as to seal the gap between the anchor, clip and prestressed tendons, and maintain the pressure in the pipeline during the grouting process. The specification requires that the prestressed pipeline grouting must be completed within 48 hours after the prestressed tendons are tensioned. During the grouting of the precast beam, the anchor concrete may crack or even break due to its short age and insufficient strength or poor density, which will lead to the inability to maintain the grouting pressure and the pipeline grouting is not dense. According to the conventional construction method, if the anchor concrete is broken, the grouting needs to be stopped and the cement slurry in the pipeline needs to be flushed with clean water, and the anchor should be re-sealed and grouting should be carried out. However, flushing the pipeline and re-sealing the anchor will delay the construction period, and it is easy for water to remain in the pipeline, affecting the grouting quality. Therefore, a structure and method for preventing and controlling the breakage of anchor concrete is needed to improve the efficiency and quality of grouting construction. Utility Model Content

[0003] The utility model provides a structure for preventing and controlling the breakage of anchoring concrete in order to solve the technical problems existing in the known technology. The structure is applied before grouting to effectively prevent the cracking and breakage of anchoring concrete. It is applied during the grouting process to reinforce the cracked anchoring concrete.

[0004] The utility model adopts a technical solution to solve the technical problems existing in the known technology: a structure for preventing and controlling the crushing of anchoring concrete, including a flexible waterproof cloth and a cable tie, wherein the flexible waterproof cloth is tightly wrapped on the anchoring concrete entity, and the edge of the flexible waterproof cloth is fixed to the outer surface of the anchor with tape and is tightly fixed with the cable tie.

[0005] The flexible waterproof cloth is composited by a plastic film and an inelastic fiber cloth, and the plastic film is located on the inner side of the flexible waterproof cloth.

[0006] The plastic film is a polyethylene film or a polyvinyl chloride film.

[0007] The flexible waterproof cloth is made of plastic-impregnated fiber cloth.

[0008] The cable tie is a nylon cable tie or a steel hoop cable tie with a self-locking structure.

[0009] The advantages and positive effects of the utility model are: the flexible waterproof cloth is used to form a tight constraint and seal on the surface of the anchor concrete entity. When applied before grouting, it can effectively prevent the anchor concrete from cracking and breaking; when applied during the grouting process, it can reinforce the cracked anchor concrete. During the grouting process, the sealing surface formed by the flexible waterproof cloth can prevent the grouting slurry from overflowing and maintain the grouting pressure in the pipeline unchanged. In addition, the utility model has a simple structure, convenient construction and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model.

[0012] In the figure: 1. Flexible waterproof cloth; 2. Cable tie; 101. Plastic film; 102. Fiber cloth; 3. Anchoring concrete entity; 4. Anchor; 5. Precast beam. DETAILED DESCRIPTION

[0013] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0014] See also Figure 1 and Figure 2 A structure for preventing anchor concrete from breaking includes a flexible waterproof cloth 1 and a cable tie 2. The flexible waterproof cloth 1 is tightly wrapped around the anchor concrete entity 3. The edge of the flexible waterproof cloth 1 is fixed to the outer surface of the anchor 4 with tape and is fastened with the cable tie 2.

[0015] Flexible waterproof cloth is used to form a tight constraint and seal on the solid surface of the anchor concrete, which can effectively prevent the anchor concrete from cracking and breaking, and can be used to reinforce the cracked anchor concrete.

[0016] In this embodiment, the flexible waterproof cloth 1 is made of a composite of a plastic film 101 and an inelastic fiber cloth 102, and the plastic film 101 is located on the inner side of the flexible waterproof cloth. The plastic film 101 is made of a polyethylene film or a polyvinyl chloride film with high tensile strength and low elastic deformation. The flexible waterproof cloth 1 can also be made of a plastic-impregnated fiber cloth. The tie 2 is a nylon tie or a steel tie with a self-locking structure.

[0017] Application of the utility model on prefabricated beams:

[0018] During the prestressing construction of precast beams, after the prestressed tendons are tensioned, the anchor 4 is pressed on the surface of the precast beam 5. After the prestressed working section is cut off, the anchor-sealing concrete entity 3 is poured on the end face of the anchor 4. The anchor-sealing concrete entity 3 is made into a hemispherical shape with a diameter equal to the diameter of the anchor 4 and a smooth surface, which is convenient for the flexible waterproof cloth 1 to be tightly wrapped and tightened.

[0019] During the grouting process of the precast beam, when the anchor concrete entity cracks, the grouting is stopped immediately; a piece of intact flexible waterproof cloth 1 without damage or leakage is tightly wrapped on the anchor concrete entity 3 and tied with a tie 2, so that the flexible waterproof cloth 1 forms a tight constraint and seal on the surface of the anchor concrete entity 3. After the flexible waterproof cloth is wrapped, the grouting is completed according to the conventional process; when the grouting slurry solidifies, the flexible waterproof cloth 1 and the tie 2 are removed.

[0020] The above-mentioned structure for preventing the anchoring concrete from breaking can also be wrapped before grouting the precast beam to prevent the anchoring concrete from cracking.

[0021] The working principle of the utility model is:

[0022] Flexible waterproof cloth is used to form a tight constraint and seal on the surface of anchor concrete to improve the crack resistance of anchor concrete; when the anchor concrete cracks, the sealing surface formed by the flexible waterproof cloth prevents the grouting slurry from overflowing and maintains the grouting pressure in the pipeline unchanged. The flexible waterproof cloth is fixed with a cable tie, which is safe and reliable.

[0023] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A structure for preventing and controlling the crushing of anchor concrete, characterized in that: It comprises a flexible waterproof cloth and a cable tie. The flexible waterproof cloth is tightly wrapped on the anchor concrete entity. The edge of the flexible waterproof cloth is fixed to the outer surface of the anchor with tape and is fastened and fixed with the cable tie.

2. The structure for preventing and controlling the crushing of anchoring concrete according to claim 1 is characterized in that: The flexible waterproof cloth is composited by a plastic film and an inelastic fiber cloth, and the plastic film is located on the inner side of the flexible waterproof cloth.

3. The structure for preventing and controlling the crushing of anchor seal concrete according to claim 2 is characterized in that: The plastic film is a polyethylene film or a polyvinyl chloride film.

4. The structure for preventing and controlling the crushing of anchor seal concrete according to claim 1, characterized in that: The flexible waterproof cloth is made of plastic-impregnated fiber cloth.

5. The structure for preventing and controlling the crushing of anchor seal concrete according to claim 1, characterized in that: The cable tie is a nylon cable tie or a steel hoop cable tie with a self-locking structure.

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