喀斯特地区隧洞地质问题与处理措施研究

引水济榕隧洞工程处于滇东北喀斯特地区,隧洞沿线石灰岩大面积分布,岩溶发育,地下水丰富,隧洞施工过程中产生塌方、涌水涌泥及地表水枯竭、地面沉陷、房屋开裂变形等不良环境工程地质问题。文章从水文工程地质条件对隧洞围岩类别进行了不同划分;对隧洞主要工程地质问题及不良地质段所采取的工程处理措施进行了深入的分析与研究,对类似该引水隧洞水利水电工程在隧洞选线、开挖支护与衬砌及因开挖隧洞而引起地面不良环境工程地质问题的预测、预报、所采取的工程处理措施等方面具有一定的借鉴作用。

The water diversion Jirong tunnel project is located in the karst area of northeast Yunnan.Limestone is distributed in a large area along the tunnel,karst is developed,and groundwater is abundant.Adverse environmental engineering geological problems such as collapse,water gushing as well as mud gushing,surface water depletion,ground subsidence and house cracking and deformation,occur in the process of tunnel construction.In this paper,the surrounding rock of the tunnel is classified according to the hydro engineering geological conditions.This paper makes an in-depth analysis and study on the main engineering geological problems of the tunnel and the engineering treatment measures taken in the bad geological section of the tunnel.the water conservancy and hydropower projects similar to this diversion tunnel can be used for reference in the aspects of tunnel route selection,excavation support and lining,as well as the prediction,prediction and engineering treatment measures of adverse environmental engineering geological problems caused by tunnel excavation.