水力发电2025，Vol.51Issue(4)：54-61,8.
抽水蓄能电站地下洞室群开挖支护方案优化研究
Optimization of Excavation and Support Schemes for Underground Caverns of Pumped-storage Power Station
摘要
Abstract
Using the numerical simulation method of FLAC3D,this study optimizes the excavation elevation,excavation sequence and support scheme for the underground caverns of a pumped-storage power station.The results show that,(a)the underground caverns are dominated by horizontal structural stresses,and minor changes in the excavation elevation and have a minimal impact on the stability of the surrounding rock;and(b)compared to the worst scheme of excavation sequence,the optimal scheme results in a smaller depth of the plastic zone of arch seat downstream of the main powerhouse,with no connection to the plastic zone of downstream wall,and a reduction in the maximum displacement at the intersection of main powerhouse and bus-bar tunnels.Furthermore,based on the numerical calculation results of original support scheme,local support optimization is conducted for the main powerhouse,bus-bar tunnels,and tailrace sluice chamber.After optimization,the problem of plastic zone connectivity between the surrounding rock of main powerhouse and transformer chamber,as well as between the bus-bar tunnels,is resolved.The volume of plastic zone of surrounding rock is decreased by 17%,and the maximum displacement of surrounding rock is decreased by 7%,which significantly improves the stability of surrounding rock.关键词
抽水蓄能电站/地下洞室群/开挖支护/方案优化Key words
pumped-storage power station/underground caverns/excavation and support/scheme optimization分类
建筑与水利引用本文复制引用
李仁杰,江浩,苏国韶,刘海滨,陈贤杰..抽水蓄能电站地下洞室群开挖支护方案优化研究[J].水力发电,2025,51(4):54-61,8.基金项目
国家自然科学基金资助项目(52169021) （52169021）
