地下水封洞库穿越风化层段巷道岩土问题分析

Analysis of Geotechnical Issues for Laneway Passing Weathering Layer Used forUnderground Water-sealed Caverns

在地下水封洞库的建设过程中,其储油洞室与地面之间的通道——交通巷道,不可避免地要穿越风化层,由于风化层岩土性质差,围岩强度、稳定性均较差,因而该段巷道在施工时的岩土问题就比较突出。以某国家石油储备地下水封洞库交通巷道施工中出现的两次塌方为例,分析了穿越风化层段巷道岩土问题出现的原因以及处理措施,希望可以为以后类似工程的建设提供参考和实践经验。

In construction of underground water-sealed caverns,the laneway between the oil storage cavern and the ground inevitablyneeded to pass through the weathered layer. Because of the poor geotechnical properties of weathered layer, the strength and stabilityof the surrounding rock wasweak, which made the geotechnical problems in the laneway prominent. In this paper,exampled with tooktwo landslides occurred in the construction of laneway in underground water-sealed caverns for country oil reserves, the causes ofgeotechnical problems occurred in the laneway passing through weathered layer and counter treatment measures were analyzed. Itis hoped that what presented herein may be used as reference and practical experience in construction of similar engineering in thefuture.