STUDY OF STRONG FLEXIBLE SUPPORTING MECHANISM AND DEFORMATION CHARACTERISTICS FOR FRACTURE ZONE IN
LARGE UNDERGROND CAVERNS
WANG Kezhong1，LI Zhongkui2，WANG Yupei1，ZHANG Zhizeng3，LIU Yaoru2
(1. School of Civil Engineering and Architecture，Zhejiang University of Technology，Hangzhou，Zhejiang 310014，China；
2. State Key Laboratory of Hydrosciences and Engineering，Tsinghua University，Beijing 100084，China；3. School of Civil Engineering and Architecture，Zhongyuan University of Technology，Zhengzhou，Henan 450007，China)
Abstract：The underground cavern group of Jinping I hydropower station，whose are huge scale and complicated arrangement，is located in geological body whose stress is high. There are three large-scale faults and multiple sets of joints in the rock mass. For the main structural plane or fracture zone，the pattern or time about supporting system，as well as parameters optimization，are the key problems to the stability for cavern group during the multistep excavation in the multi-cavern group. According to the excavation and supporting process for the underground cavern group，the deformation and cracking mechanism of surrounding rock mass and faults in main cavern have been researched，as well as the coupling mechanism and characteristics of mechanics and deformation about multiple supporting have been discussed. Based on numerical simulation and measurement in-situ，studying the strong flexible technology that shotcrete system and steel arch rib. It is showed that the huge deformation of surrounding rock mass reduced greatly；and the instability or collapse that caused by the local instability are avoided by applying the new technology. There are important reference and guide significance to the construction and design of the underground cavern group.
王克忠1，李仲奎2，王玉培1，张志增3，刘耀儒2. 大型地下洞室断层破碎带变形特征及强柔性支护机制研究[J]. 岩石力学与工程学报, 2013, 32(12): 2455-2462.
WANG Kezhong1，LI Zhongkui2，WANG Yupei1，ZHANG Zhizeng3，LIU Yaoru2. STUDY OF STRONG FLEXIBLE SUPPORTING MECHANISM AND DEFORMATION CHARACTERISTICS FOR FRACTURE ZONE IN
LARGE UNDERGROND CAVERNS. , 2013, 32(12): 2455-2462.
李仲奎，周 钟，汤雪峰，等. 锦屏一级水电站地下厂房洞室群稳定性分析与思考[J]. 岩石力学工程学报，2009，28(11)：2 167-2 175. (LI Zhongkui，ZHOU Zhong，TANG Xuefeng，et al. Stability analysis and considerations of underground powerhouse caverns group of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 167-2 175.(in Chinese))
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2013, Vol. 32 
