LOOSENING ZONAL MODEL AND ITS APPLICATION TO BACK ANALYSIS OF UNDERGROUND ENGINEERING
CHEN Qiuhong1，2，LI Zhongkui1，ZHANG Zhizeng1
(1. State Key Laboratory of Hydro science and Hydraulic Engineering，Tsinghua University，Beijing 100084，China；2. Beijing Geological Institute Engineering Consultants Ltd.，Beijing 100038，China)
Abstract：Due to blasting and other disturbances during the process of excavation of underground caverns，loosening zone around the caverns can be found，and it would become larger with time at high geostress. Several loosening zone models and its simulation method proposed are introduced by other scholars. Based on the models， a new model is proposed that is related to frequency and displacement，which can be used to large and complex underground caverns. Due to different forms and distribution loosing zones around the underground caverns，its application to displacement back analysis for Jinping I hydropower underground caverns is introduced. Therefore，it should consider loosening zone in back analysis，and the proposed loosening model is suitable for underground engineering.
陈秋红,李仲奎，张志增. 松动圈分区模型及其在地下工程反馈分析中的应用[J]. 岩石力学与工程学报, 2010, 29(S1): 3216-3220.
CHEN Qiuhong1，2，LI Zhongkui1，ZHANG Zhizeng1. LOOSENING ZONAL MODEL AND ITS APPLICATION TO BACK ANALYSIS OF UNDERGROUND ENGINEERING. , 2010, 29(S1): 3216-3220.
