Flac3D Numerical Simulation Study on the Failure Developing Law of Interface for Geotechnical Prestressed Anchorage Bolt

Abstract

One of the main failure forms of inner bond section for prestressed anchorage structure is the failure of interface between the rock mass and the grouting body, so this interface is usually one of the weak link of the whole anchorage system, and so it is important to analyze the failure developing law of the interface. Based on the finite difference program FLAC3D, the numerical analysis model of inner bond section for prestressed anchorage bolt was built, and the failure developing laws of inner bond section under step loading were studied from three aspects: displacement change, shear stress change and yield point position change. The influence of the change of inner bond section length and the grouting body strength on the inner bond section failure developing law was also analyzed. At last, compared with the results of indoor static load test, the reliability of the numerical simulation was certified.