某电站地下洞室围岩稳定性分析  

Stability Analysis of Surrounding Rock in Underground Cavern of a Power Station

作　　者：胡璐宇 HU Luyu(Power China Zhongnan Engineering Co.Ltd.,Changsha 410014)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,长沙410014

出　　处：《四川地质学报》2025年第1期143-146,共4页Acta Geologica Sichuan

摘　　要：位于早白垩系花岗岩地层中的某大型水电站地下洞室群铅直埋深约380~440 m,开挖尺寸达200.0 m×25.0m×50m(长×宽×高)。其规模大、地下洞室多,前期勘探平洞揭露断层及节理裂隙较为发育,洞室围岩失稳可能对水工建筑物产生破坏性影响。基于地下洞室工程地质勘察,对地下洞室群顶拱及各侧端墙进行块体分析,总结块体失稳形式并提出防治措施,对类似地下洞室稳定性分析及评价有一定的借鉴意义。The vertical burial depth of a large hydropower station underground cavern group in the early Cretaceous granite stratum is about 380~440 m,and the excavation size is 200.0 m×25.0m×50m(length×width×height).It is large in scale and has many underground caverns.The faults and joint fissures exposed by the preliminary exploration are relatively developed.The instability of surrounding rock of the caverns may have destructive effects on hydraulic structures.Based on engineering geological investigation of underground caverns,the block analysis of the top arch and each side end wall of underground caverns is carried out,which can be used for reference for the stability analysis and evaluation of similar underground caverns.

关 键 词：断裂构造 节理裂隙 块体分析 失稳形式 

分 类 号：P583[天文地球—岩石学]