Study of Numerical Simulation on Supporting Parameters of Soft Rock Tunnel

摘要

Rational supporting forms and parameters can insure the stability and safety of soft rock tunnel. It is needed to adopt systematical anchor bars as well as shotcrete, steel fabric and steel arch centering as united supporting pattern in the segment of tunnel that the large deformation may occur. Taking Huoche Mountain Tunnel that is one of the Shi-Man Expressway tunnels as example, large deformations sometimes happened even after preliminary lining, so the secondary lining should be rationally operated to restrain the deformation. Hence, FLAC3D is used to simulate three planned supporting schemes and different results are obtained. Through analyzing, the final supporting parameters can be decided to insure the stability of soft rock tunnel.