黏土岩在评价隧道涌突水中的作用

针对遵义至余庆高速公路控制性工程桃子台隧道的水文地质条件及涌水量,通过分析泥岩、泥灰岩等黏土岩在地下水运动中的隔断作用,验算隧道底板高程跟黏土岩层底板的高程关系;引入基坑突涌水验算公式,复验黏土岩之下的承压水跟黏土岩之上的总水土应力的关系,从定性和定量角度作出了准确的判断.

Application of the Clay Rock to Appraise the Gushing-bursting Water of the Tunnel

In relation to the hydrogeological conditions and water inflow of Taozitai tunnel of Zunyi—Yuqing highway control engineering, through analyzing the partition function of shale, marl and other clay rock in the groundwater movement, the elevation relationship between tunnel floor and clay rock floor was calculated. By introducing a calculation formula for inrush water of foundation pit”, the relationship between the confined water under clay rock and total soil and water stress above the clay rock was rechecked, and an accurate judgment from a qualitative and quantitative perspective was made.