盘岭隧道突水和突泥事故地质成因分析及处治措施

长大山岭隧道施工过程中不可避免地要通过断层破碎带等不良地质,在断层带地下水发育、导水性较好、补给充分的情况下,极易发生突泥涌水等地质灾害,严重影响施工安全。针对三黎高速公路盘岭隧道工程发生的突水、突泥类破坏模式进行分析,探索未胶结的富水压性断层突水、突泥的特征、模式及地质成因。并对该隧道提出了反向施工、全断面帷幕注浆的施工顺序及方法,有效地控制了隧道施工造成的地下水流失,达到了预期处治效果,保证了施工安全。

Treatment Measures Based on Analysis of Geologic Origin of Water-burst and Mud-burst Accident in Panling Tunnel

It is unavoidable for long mountain tunnels to go through unfavorable geology, such as fractured rock and fault zones. Water-burst and mud-burst are likely to happen if the area has well developed underground water, good hydraulic conductivity and sufficient supply, which may seriously affect construction safety. The failure mode like water-burst and mud-burst in Panling tunnel along Sansui-Liping Expressway is analyzed, characteristics, patterns, and geological origin of water-burst and mud-burst in water-rich compressive fault uncemented are explored, reverse construction of tunnel, construction sequence and methods of full fracture surface of the tunnel construction are put forward in this paper, which effectively control the loss of underground water caused by tunnel construction, reach the expected treatment effect and ensure the construction safety.