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| DYNAMIC DESIGN AND RESEARCH ON EXCAVATION AND SUPPORT DESIGN OF UPPER SURGE CHAMBER CAVERNS OF JINPING II HYDROPOWER STATION |
| CHEN Tao，WU Xumin，CHEN Xiaojiang |
| (East China Investigation & Design Institution，CHECC，Hangzhou，Zhejiang 310014，China) |
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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.
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Received: 27 May 2013
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2014, Vol. 33 
