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。
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。
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