摘要
根据某水电站地下厂区所处的地质环境,对初始地应力进行了反演分析,得知该场地为中高地应力场。在此基础上,根据地下厂房的布局及开挖顺序,采用FLAC3D软件建立了整体三维计算模型,对分期开挖过程中洞周的应力场、位移场和破坏区的分布规律进行了分析。结果表明,给定的开挖顺序和支护条件较有效地限制了围岩的破坏区发展和变形,改善了围岩的应力状态;但围岩条件相对于高地应力场来说较弱,深部开挖扰动难以控制,建议在局部位置应加强支护。
According to the geological environment of underground powerhouse,an inversion analysis for the initial geostress filed is carried out and it is concluded that the region is belong to middle-high terrestrial stress.Based on the layout and excavation sequence of underground powerhouse,the whole three-dimensional computational model is established by using FLAC3D software.And then the distribution rules of stress filed,displacement field and yield zones around main caverns are analyzed during the process of e...
出处
《水电能源科学》
北大核心
2010年第5期88-90,126,共4页
Water Resources and Power
基金
贵州大学自然科学青年基金资助项目(2007049)
关键词
地应力场
地下洞室
围岩稳定
FLAC3D
geostress filed
underground caverns
stability of surrounding rock
FLAC3D
