筠连隧道水文地质分区及涌突水危险性评价

Hydrogeological Subdivision of Junlian Tunnel and the Risk Assessment of Water Inrush

基于筠连隧道工程地形地貌、地层岩性、地质构造、水文地质等条件的研究,进行了水文地质单元划分。在水文地质分区的基础上对筠连隧道进行施工涌突水危险性评价,总体上隧道中危险区以上占96.2%,涌突水危险性较大;在水文地质分区及涌突水危险性评价的基础上,又对初步拟定的隧道施工工作面进行危险性评价,为优化工作面的选择提供依据。

Depending on the studies of the topographical, lithological,geological structure and hydrogeological conditions of Junlian Tunnel,the hydrogeological subdivisions were made and,on this basis,the risk assessment of water inrush in the construction was carried out.Generally,the subdivisions of the Tunnel subject to intermediate risk or above occupied 96.2 % with high risk of water inrush.Next,given the subdivisions and the inrush assessment,the risk assessment on the tunnel face to be mapped out initially was conducted as well,providing the basis of tunnel face optimization.