Severe deformation occurred at the siluric stratum at the ridge of Wushaoling Tunnel, causing splitting of primary lining and even exceeding clearance limit.
乌鞘岭隧道岭脊段志留系地层千枚岩夹板岩地段，施工中发生大变形，初期支护开裂破坏甚至侵限。
2
Based on gray system, programming the software, which can be used to forecast the final clearance displacement oftunnel according to some data of monitoring, named GM-TUNNEL.