Abstract
A corrosive medium (particularly a chloride medium) with water is typically found in the working environment of a prestressed anchor cable. The anchor cable structure itself has certain characteristics such as complex details, high working stress, extremely difficult control in construction, and hidden operation in construction and maintenance. Thus, corrosion is the key problem related to the use of anchor cables. Relevant research focuses on the corrosion type, basic corrosion principle, and corrosion development law of anchor cables at the qualitative level. In this paper, the corrosion progress of the interior bond section of anchor cable under chloride attack is studied through long-term systematic experiments and theoretical analysis. Serial time-varying models, such as those for instantaneous corrosion rate, weight loss rate of corrosion, and tensile capacity, are established based on the Hill function. Two factors, namely, chlorine ion concentration and pore water saturation of the ground around anchor cables, are set as the independent variables in all of the models.
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