西北水电Issue(4)：57-64,8.DOI:10.3969/j.issn.1006-2610.2026.04.008
基于子模型法的抽水蓄能电站地下洞室群流固耦合稳定性分析
Fluid-Solid Coupling Stability Analysis of Underground Cavern Groups of Pumped Storage Power Stations Based on Submodel Method
摘要
Abstract
To analyze the surrounding rock stability of underground powerhouse after excavation of pumped storage power stations and clarify the influence law of main cavern spacing on the stress characteristics of rock pillars and surrounding rock deformation,a local re-fined model is established based on fluid-solid coupling theory and the submodel mapping technology with shape function interpolation,while ensuring the authenticity of in-situ stress field and seepage boundaries.The mechanical responses of unsupported bare caverns un-der spacing schemes of 35 m、40 m and 45 m are compared and analyzed.The results show that the plastic zones are mainly concentrated at the junctions of straight walls and arch crowns of main caverns,floor corners and variable cross-section positions of busbar tunnels.When the spacing decreases from 40 m to 35 m,the overlap of stress disturbance zones between adjacent caverns leads to a trend of plas-tic penetration in rock pillars,and the floor heave of the main transformer tunnel increases by 19.1%.When the spacing rises to 45 m,the damage scope of the roof and floor of busbar tunnels expands.The spacing of 40 m can effectively avoid the overlap of stress disturb-ance and keep the deformation within a relatively reasonable range.The research findings can provide references for the layout of cavern groups in pumped storage power stations.关键词
流固耦合/地下厂房洞室群/围岩稳定性/子模型法Key words
fluid-solid coupling/underground workshop cavern group/surrounding rock stability/submodel method分类
建筑与水利引用本文复制引用
董嘉辉,侯晓萍..基于子模型法的抽水蓄能电站地下洞室群流固耦合稳定性分析[J].西北水电,2026,(4):57-64,8.基金项目
陕西省自然科学基础研究计划项目(2024JC-YBQN-0492) （2024JC-YBQN-0492）
