Inner balance type pre-stressed anchor cable stress corrosion test system and method

Abstract

The invention discloses an inner balance type pre-stressed anchor cable stress corrosion test system and method. The inner balance type pre-stressed anchor cable stress corrosion test system comprises a supporting structure consisting of supporting steel plates, a tension structure consisting of bolts and a loading movable steel plate, and a corrosive solution container; the supporting structure is formed by welding a steel pipe between the two supporting steel plates; a small hole is formed in the middle of each steel plate and is used for an anchor cable to pass through; in the tension structure, the movable steel plate arranged on a supporting steel pipe in a sleeving way is connected with the supporting steel plate at one end through the bolts, and a test anchor cable, of which the two ends are fixed on the supporting steel plates and the movable steel plate, is tensioned by a fastening bolt; and the corrosive solution container is arranged in the middle of the tension structure, and the test anchor cable passes through the center of the corrosive solution container. The system and the method can be used for simulating different stress conditions, different corrosion environments and different corrosion time of the anchor cable, the application range is wide, and a result is accurate.

Description

technical field [0001] The invention relates to the fields of civil engineering test technology and metal material corrosion, in particular to a prestressed anchor cable stress corrosion test system and a test method thereof. Background technique [0002] After the 1970s, anchor cables were widely used in various geotechnical engineering anchorage structures in my country. In permanent support projects, their service life has become a concern, and the biggest threat to service life is corrosion. The anchor cables in the anchorage structure are generally prestressed, and the applied prestress tends to be higher and higher. The anchorage structure forms stress corrosion under the synergistic effect of high stress and corrosion. Many domestic scientific research institutes have successively carried out experimental research on the stress corrosion of prestressed anchor cables, and achieved a lot of results: First, "Civil Architecture and Environmental Engineering" No. 6, 2009 ...

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Problems solved by technology

This test can simulate different stresses, different corrosion factors and corrosion time, but the tension loss of the anchor cable after tensioning is random and difficult to be accurate, and the corrosive liquid is in contact with concrete, which is prone to leakage. Reaction of concrete materials etc.

A comprehensive analysis of the above-mentioned test systems has many deficiencies, including: first, the tension of the load cannot be precisely controlled, and there is randomness; second, it is difficult to ensure that the corrosion solution is free from pollution and the factors are single; third, the test design Relatively complicated, it is difficult to carry out repeated tests, and the cost is high

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