句容抽水蓄能电站地下厂房洞室群支护措施研究

摘要

针对句容抽水蓄能电站地下厂房洞室群复杂的工程地质条件,参考类似工程支护设计经验,以柔性的系统喷锚支护为主,拟定3种不同的支护方案,运用3DEC建立数值分析模型,并基于该模型对地下厂房洞室群不同支护方案进行围岩稳定分析.通过对地下厂房洞室群3种支护方案的围岩变形、围岩应力及塑性区分布等多方面进行分析、比较,结合考虑工程投资、施工工期、施工组织等多方面影响因素,最终确定适合该地下厂房洞室群的合理支护措施.%For the complicated engineering geological conditions of underground caverns at Jurong Pumped Storage Power Plant,reference to supporting design experience of similar projects,flexible support system designed to shotcrete and an-chor support mainly to develop three different support measures schemes. Using 3DEC mathematical model,based on the model of the underground caverns different support schemes were analyzed by the surrounding rock deformation,stress and plastic zone characteristics terms of comparison,considering various factors combined project investment,construction pe-riod,construction,and ultimately determine the reasonable support measures for the underground powerhouse caverns.