Abstract：The upper surge chamber project of Jinping II hydropower station has large cavern group which owns big section area and high shafts. For the sake of stability of surrounding rock during the construction period，and ensuring security of concrete lining in the operation period，based on the complex geologic condition of the site，this paper adopts a three-dimensional discrete element software 3DEC to conduct dynamic excavation and support analysis mainly for the shafts of surge chamber，and the calculation results match the actual monitoring data basically，which has played a role in guiding the project design. Furthermore，this paper focuses on a complete set of procedure and method for dynamic design，and gives some suggestions to the analysis method and parameter choice. The application effect of using 3DEC and discrete element method in the field of solving structure planes controlled project is also demonstrated，which could provide some beneficial reference to other similar projects.
陈 涛，吴旭敏，陈晓江. 锦屏二级上游调压室洞室群开挖支护动态设计与研究[J]. 岩石力学与工程学报, 2014, 33(sl): 2593-2599.
CHEN Tao，WU Xumin，CHEN Xiaojiang. DYNAMIC DESIGN AND RESEARCH ON EXCAVATION AND SUPPORT DESIGN OF UPPER SURGE CHAMBER CAVERNS OF JINPING II HYDROPOWER STATION. , 2014, 33(sl): 2593-2599.
中华人民共和国行业标准编写组. DL/T5099—2011水工建筑物地下工程开挖施工技术规范[S]. 北京：中国电力出版社，2011.(The Professional Standards Compilation Group of People?s Republic of China. DL/T5099—2011 Technical specification for excavation of underground works on hydraulic structure[S]. Beijing：China Electric Power Press，2011.(in Chinese))
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2014, Vol. 33 
