| Key Rock Mechanics Problems and Countermeasures on Huge Diversion Tunnel of Baihetan Hydropower Station（白鹤滩水电站巨型导流洞关键岩石力学问题与对策） |
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| 引用本文： | ZHOU Chuiyi,CHEN Pingzhi,HE Shihai,CHEN Jianlin,LIU Ning.Key Rock Mechanics Problems and Countermeasures on Huge Diversion Tunnel of Baihetan Hydropower Station（白鹤滩水电站巨型导流洞关键岩石力学问题与对策）[J].隧道建设,2018,38(3):383-391. |
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| 作者姓名： | ZHOU Chuiyi CHEN Pingzhi HE Shihai CHEN Jianlin LIU Ning |
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| 作者单位： | (1. PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, Zhejiang, China; 2. HydroChina Itasca Research and Development Center, Hangzhou 310014, Zhejiang, China) |
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| 摘 要： | The large scale diversion tunnel of Baihetan Hydropower Station has complex geological conditions, thus various problems of rock mechanics appeared during the process of excavation. Typical damage and fracture mechanics are analyzed in depth, including the collapse along weak rock joint, stress controlled spalling, failure modes of fractured rock mass, relaxation damage of fractured rock columnar joints, localized stress affected by structural surfaces and stress controlled problems of superior fracture combinations. Engineering countermeasures are also summarised, which includes supporting measures, construction methods, supporting time, and monitoring and feedback methods for different types of failure. Through these measures, rock mechanics problems are successfully solved. Stability control of the surrounding rock of underground caverns under complicated geological conditions are achieved, ensuring successful completion of the enormous diversion tunnel of Baihetan.
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| 关 键 词： | Baihetan Hydropower Station diversion tunnel interlayer shear belt columnar joint high stress engineering countermeasures |
| 收稿时间： | 2018-01-31 |
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