抽水蓄能电站地下厂房围岩稳定性分析

Stability Analysis of Surrounding Rock of Underground Powerhouse in Pumped Storage Power Station

根据抽水蓄能电站地下厂房洞室群的布置和洞室围岩的地质条件,建立了拉格朗日差分分析模型。分层开挖厂房的模拟方案,进行洞室群开挖后的相关分布特征,包括围岩塑性区、应力场、位移场等,以揭示潜在破坏位置和围岩应力集中位置的分布规律。分析结果表明,广东阳江抽水蓄能电站地下厂房洞室群围岩稳定,满足成洞条件。

Based on the layout of underground powerhouse caverns in pumped storage power plants and the geological conditions of surrounding rock,this paper establishes a Lagrangian difference analysis model.It introduces the simulation scheme of layered excavation of the factory building,as well as the relevant distribution characteristics of the excavation of the tunnel group,including the plastic zone of the surrounding rock,stress field,displacement field,to reveal the distribution patterns of potential failure locations and stress concentration locations of the surrounding rock.The analysis results indicate that the surrounding rock of the underground powerhouse cavern group of Yangjiang Pumped Storage Power Station in Guangdong is stable and meets the conditions for tunnel formation.