摘要
结合河南宝泉抽水蓄能电站地下洞室开挖过程的三维非线性分析,讨论了地应力场中侧压力系数对围岩塑性区分布的影响。其中,岩体材料为理想塑性,屈服准则采用Drucker-Prager准则,从理论上推导了地应力中侧压力系统和材料参数与围岩塑性区之间的关系,主要是对洞室中典型的马蹄形洞室的3个最易出现塑性的区域进行了研究,得出了它们的塑性区分布规律与侧压力系数的关系。在河南宝泉抽水蓄能电站洞室开挖过程的三维非线性分析中,验证了这个规律。这些规律和认识可作为工程设计的参考和导则。
Three-dimensional non-linear analyses are performed for the underground openings of Baoquan pumped-storage power station in Henan province. The influene of the horizontal in-situ stresses on the distributions of plastic zones is discussed. The Drucker-Prager model is used as yielding criterion. A relation among lateral pressure coefficient, material properties and distribution of plastic zone is also derived theoretically. The region for the yielding most likely to take place is found, and the distributions of plastic zones in terms of the lateral pressure coefficient are obtained. The theoretical study is then confirmed by three-dimensional non-linear analyses.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第8期1344-1348,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
地下洞室
开挖
塑性区
地应力
三维非线性分析
抽水蓄能电站
rock mechanics, in-situ stresses,coefficient of lateral pressure, underground openings, plastic region
