A hydrophobic composite steel core glass fiber anti-floating anchor rod and its construction method

Abstract

The present invention involves a hydrophobic composite steel core glass fiber anti -floating anchor rod. The aspect of the anchor rod is cylindrical as a whole.There are threads at both ends of the body, and the middle part of the anchor body is a smooth surface and a hydrophobic film.The present invention makes up for the lack of existing anti -floating techniques. The end of the anti -floating anchor rod has a self -anchoring device to form a focus point for anti -floating anchor rods. Except for anchoring section, the surface of the anti -floating anchor rod is applied to hydrophobic.The membrane has a weak adhesion between the surface of the anchor rod and the cement pulp, which simplifies the construction process, improves the construction speed, and ensures the quality of construction.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering and civil construction engineering, and relates to an anti-floating construction technology for underground structures in geotechnical engineering, in particular to an anti-floating anchor rod with a hydrophobic membrane composite steel core fiber and a construction method thereof. Background technique [0002] With the development and utilization of urban underground space, the problem of anti-floating has become more and more prominent. Compared with anti-floating technical measures such as groundwater drainage, ballast method, and anti-floating piles, anti-floating anchors have strong stratum adaptability, scattered Stress, easy construction, cost saving and other advantages. At present, the anti-floating anchors commonly used in underground engineering are mainly metal anchors. These metal anchors have some disadvantages, such as easy failure due to corrosion and complicated c...

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Problems solved by technology

[0004] For example, the patent discloses "a fibrous plastic bar with superfine steel wires and its manufacturing method", which uses superfine steel wires with a diameter not greater than 0.03mm added, and the steel wires and fiber plastics are arranged in layers. Although this invention solves the problem of The disadvantage of poor ductility of fiber plastic reinforcement, but due to the layered and circular arrangement of steel wire and fiber plastic, the shear resistance cannot be increased to a greater extent

For example, the patent application "a glass fiber plastic rod with a steel wire core" uses steel wire to form the rod core, and the steel wire and the glass fiber plastic are bonded into a whole with resin and cured into a whole. The inside of the glass fiber plastic rod is made of steel wire, and the steel wire is concentrated. The steel wire core is arranged to improve the shear strength of the whole fiberglass rod; however, the surface of the plastic rod in this invention is threaded to increase the bonding force between the plastic rod and the cement slurry, which cannot meet the anti-floating requirement of the bottom as the focus point. Requirements for anchor rods; the use of thinner steel wires of 0.1~1.0mm leads to complex production processes and low tensile strength. Larger diameter rods are required during construction, which increases construction costs.

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