水电站引水隧洞围岩稳定分析及支护设计

摘要

The diversion tunnel construction of hydropower project has long excavation route,large engineering quantity and large excavation tunnel diameter with features.Besides,gushing mud,gushing water,collapse and other accidents are more likely to occur in the construction process affected by unfavorable geology.Taking the diversion tunnel of Liang wan hydropower station as an example,this paper carries out the calculation,analysis and demonstration of surrounding rock stability and designs the initial support scheme of surrounding rock,which can be regarded as an effective reference for the construction of tunnel structure.%水电工程引水隧洞施工具有开挖路线长、工程量大、开挖洞径大等特点.在施工过程中受不良地质的影响容易出现涌泥、涌水、坍塌等事故.本文以良湾水电站引水隧洞为例,对围岩稳定性进行计算分析和论证,并对围岩初期支护方案进行设计,为洞室结构施工提供有效参考.