The influence of the bolt parameters on the horizontal displacement of tension-anchor supporting structure

Abstract：In this paper, the effect of the bolt design parameters of the foundation pit engineering on the horizontal displacement of tension?anchor supporting structure is performed by FLAC3D.Numerical simulation results show that the maximum horizontal displacement decrease with the increase of the bolt length, which is fit for being controlled between 1.5 and 2.0 times of the excavation depth.At the same time, the dip angle of bolt doesn't influence on the maximum horizontal displacement when it is between 15° and 30°.The study also shows that the stiffness of bolt can not be too large or too small, and it is more fitful when the stiffness reaches 18.75?GPa.

Keyword：design parameters of bolt;tension-anchor supporting structure;numerical simulation;