岩溶强烈发育区隧道的现场监测与分析

Construction Monitoring of Tunnels in Well Developed Karst Terrains

隧道穿越富水软弱围岩,灰岩地区岩溶强烈发育,多采用双层初期支护。此类隧道在国内并不多见,可借鉴的工程经验很少,因此对隧道的现场监测就显得尤为重要。通过监测围岩压力、衬砌水压、初支以及衬砌内力等内容,可以分析设计参数的安全性及合理性,指导施工,为类似的工程提供经验。

The double linear supporting technique is rarely used in the construction of tunnels in rich groundwater and the welldeveloped karst soft surrounding rock masses. Little published literatures can be found as a construction guide. Therefore, it is critically important for the monitoring of the tunnels during the construction. This paper presents the monitoring results of stress in the rock mass, pore water pressures as well as stress within the liner. The monitoring results can provide the accumulation of the experience for the tunnel construction in similar conditions.