高风险特长隧道反坡综合施工技术

Analysis on Comprehensive Construction Technology of High-risk Long Tunnel Back Slope

本工程项目所属隧道地质条件极其复杂,项目施工过程中不可预见的地址灾害较多,属Ⅰ级高风险隧道,项目设计阶段很难预判围岩的实际情况,因此导致隧道施工完工日期延后。如按原设计方案只采用顺坡施工,无法保证隧道在规定工期内实现贯通,经过计算,采用顺反坡施工相结合的施工方案能有效预防和处理塌方、突水、突泥问题,从而有效缩短工期,

The project of the geological conditions of the tunnel is extremely complex,more projects in the construction process of the unpredictable address disaster,is a grade I with high risk tunnel,the design phase of the project is hard to predict rock,thus leading to the tunnel construction completion date delayed.If in accordance with the original design scheme using only along the slope construction can not guarantee the tunnel within the prescribed time limit for a project to achieve through.After calculation,the working scheme of the combination of reverse slope construction can effective prevention and treatment of landslides,sudden water inrush mud,so as to effectively shorten the construction period,ensure that the project can be completed within the specified time limit.