Abstract The integrity of surrounding rock is commonly destroyed by the existence of a fractured fault zone. In order to understand the effects of distance variation between a tunnel and a fault on the stability of surrounding rock, the failure behavior of surrounding rock was studied by laboratory model experiments based on the Shijiazhuang-Jilin expressway tunnel and examining the conditions with/without faults as well as the varying distances between tunnels and faults. The results indicate that the stability of the surrounding rock is greatly affected by the existence of a fault since an integrated pressure arch cannot be formed when the distance between the tunnel and fault is less than one times the tunnel diameter, and the excavation has an asymmetrical influence on the stability of the surrounding rock on both sides of the tunnel contour.
Abstract：
The integrity of surrounding rock is commonly destroyed by the existence of a fractured fault zone. In order to understand the effects of distance variation between a tunnel and a fault on the stability of surrounding rock, the failure behavior of surrounding rock was studied by laboratory model experiments based on the Shijiazhuang-Jilin expressway tunnel and examining the conditions with/without faults as well as the varying distances between tunnels and faults. The results indicate that the stability of the surrounding rock is greatly affected by the existence of a fault since an integrated pressure arch cannot be formed when the distance between the tunnel and fault is less than one times the tunnel diameter, and the excavation has an asymmetrical influence on the stability of the surrounding rock on both sides of the tunnel contour.
.Experimental Study on the Relative Distance Between a Tunnel and
a Fault and Subsequent Effects on the Stability of the Surrounding Rock[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(3): 59-65
2013, Vol. 50 