摘要
锦屏I级水电站处于高地应力区,地下厂房围岩在此是表现有一定塑性的大理岩。在工程开挖后围岩和支护结构的变形开裂特征明显。针对这些特点,采用损伤流变耦合的三维模型和分析方法,结合运用裂隙张开产生的附加变形分析法,对该工程地下厂房洞室群的稳定性进行分析,将厂房若干关键点的位移量与实测值进行对比,取得了较好的结果;同时,对洞室的长期时效变形进行预测分析。
Jinping I hydropower station is located in a high initial stress area, the surrounding rock is the marble and in this area behaves in obvious plasticity. After excavation, the deformation and cracking phenomena in the surrounding rock and support structures are obvious. In view of these features, a coupled damage rheology 3D model and analysis method and prediction method for incremental deformation due to crack opening are adopted for caverns stability analysis. And the computation displacement is compared with the field monitoring data. It is shown that the two results are in good agreement with each other. Furthermore, the long-term displacements of surrounding rocks are predicted and analyzed.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第5期865-872,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41072234)
山东省自然科学基金重点项目(ZR2009AZ001)
中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室资助课题(Z011001)
关键词
数值分析
三维损伤流变模型
劈裂破坏
地下洞室群
张开位移
numerical analysis
3D damage rheology model
splitting failure
underground cavern group
opening displacement
