某高速公路松节理隧道工程地质特性及洞口边坡稳定性评价

Engineering geological characteristics and stability evaluation of tunnel side slope of songjieli tunnel on an expressway

松节理隧道隧址区位于太岳山坳缘翘起带,隧址区范围内无特殊岩土分布,对隧道围岩稳定性有影响的不良地质主要为岩溶。本文对隧道区岩体工程地质特征和水文地质特征进行了分析,对隧道洞口边坡稳定性进行了评价。认为隧道围岩为岩质围岩,围岩稳性较差,地下水类型主要有松散岩类孔隙水、碳酸盐岩裂隙岩溶水。隧道在雨季开挖或通过软弱破碎夹层、断层破碎带及节理密集带时,不排除发生突水的可能;沁源端洞口和霍州端洞口边坡稳定性差。

The tunnel site is located in the uplift zone of the margin of the Taiyue Mountain.Lack of special geotechnical distribution within the tunnel site,it is karst which has an impact on the stability of the tunnel surrounding rock.This paper analyzed the engineering geological characteristics and hydrogeological characteristics of the rock mass in the tunnel area,and evaluated the stability of the tunnel entrance slope.The surrounding rock of the tunnel is rocky surrounding rock,the stability of the surrounding rock is poor,and the main types of groundwater are pore water of loose rocks and karst water of carbonate fractures.When the tunnel is excavated in the rainy season or passes through weak broken interlayers,fault broken zones and joint dense zones,the possibility of water inrush cannot be ruled out.The slope stability of Qinyuan end tunnel mouth is poor,and the stability of Huozhou end cave mouth slope is poor.