摘要
某水电站地下厂房工程区地质情况复杂,不利地质构造及断层节理的发育影响其围岩稳定性。根据实际工程地质资料,利用FLAC3D软件建立厂区三维数值模型,反演初始地应力场,分析开挖过程中围岩稳定性,比选主厂房与主变室最优间距方案。结果表明,该地下洞室群整体稳定性较好,具备成洞条件;从毛洞开挖条件下的位移、应力、塑性区分布情况及工程经济效益出发,对洞室间距进行优选,确定40 m洞室间距为最优方案。本研究对该水电站地下厂房洞室优化及安全施工具有一定指导意义。
The geological conditions of underground powerhouse engineering area of a hydropower station is complicated,the unfavorable geological structure and the development of fault joint are the key factors affecting the stability of surrounding rock.According to the actual engineering geological data,the three-dimensional numerical model is established by FLAC3D software,the initial geostress field is inversion,the stability of surrounding rock is analyzed during excavation,and the optimal spacing scheme between the main powerhouse and the main transformer chamber is selected.The results show that the overall stability of the underground cavern group is good,and it affirms their feasibility for construction.According to the distribution of deformation,stress,plastic zone and engineering economic benefit under the condition of tunnel excavation,the cavern spacing is optimized,and the optimal scheme is determined to be 40 m cavern spacing.This study has a certain guiding significance for the optimization and safe construction of underground powerhouse caverns of a hydropower station.
作者
王艳强
孙晓红
陈焕杰
罗滔
傅少君
WANG Yanqiang;SUN Xiaohong;CHEN Huanjie;LUO Tao;FU Shaojun(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250014,China;College of Water Resources and Architectural Engineering,Northwest Agricultural and Forestry University,Yangling 712100,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《武汉大学学报(工学版)》
CSCD
北大核心
2024年第S1期20-24,共5页
Engineering Journal of Wuhan University
基金
陕西省青年科技新星项目(编号:2022KJXX-85)
山东电力工程咨询院有限公司科技研发项目(编号:37-K2022-037)
关键词
地下厂房
围岩稳定性
FLAC3D
洞室间距优化
underground powerhouse
stability of surrounding rock
FLAC3D
optimization of cavern spacing
