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| 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) |
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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.
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Received: 08 June 2013
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KANG Hongpu1, 2, 3*, GAO Fuqiang1, 2, 3, WANG Xiaoqing1, 2, 3, YUAN Guiyang1, 2, 3, YANG Lei1, 2, 3, LOU Jinfu1, 2, 3. Development and application of a large-scale experimental system for roadway rockburst induced by fault slip[J]. , 2026, 45(6): 1599-1614. |
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2013, Vol. 32 
