水力发电2018，Vol.44Issue(3)：19-22,28,5.
复杂地质条件下大型地下洞室群围岩稳定性研究
Stability Analysis of Surrounding Rock Masses of Large Underground Caverns under Complicated Geological Conditions
摘要
Abstract
The weak geological structure plane is an important factor to control the stability of surrounding rock masses of underground caverns,such as the faults.Taking a large underground powerhouse as an example,the stability of its surrounding rock masses is analyzed by using three-dimensional nonlinear finite element method.The three-dimensional finite element model considering dominant fault structures of underground caverns is established to analyze the displacement field,stress field and plastic distribution in surrounding rock mass with supporting or without supporting respectively.The results show that,(a) the deformation of surrounding rock is obviously affected by faults,the stress mutation mostly appears in the area where the fault runs through,and the plastic area in the exposed part of fault is larger;and (b) the deformation of surrounding rock has been effectively controlled when the supporting is applied,and the stress concentration and the distribution of plastic area are also decreased.关键词
断层/围岩稳定性/地下洞室群/开挖支护Key words
faults/surrounding rock stability/underground caverns/excavation and supporting分类
建筑与水利引用本文复制引用
苏超,茆晓静,赵业彬,魏琳帆..复杂地质条件下大型地下洞室群围岩稳定性研究[J].水力发电,2018,44(3):19-22,28,5.基金项目
国家自然科学基金项目(51279053) （51279053）
