5洞室开挖施工-中国科学技术协会.DOC

溪洛渡水电站超大型地下厂房洞室群岩体工程控制与监测 李金河1，伍文锋2，李建川 (1. 中国长江三峡集团公司，湖北 宜昌 443002；2. 长江空间信息技术工程有限公司，湖北 武汉 430010) 摘要：金沙江溪洛渡水电站地下厂房洞室群规模巨大，结构复杂，玄武岩组内层间与层内错动带岩体非连续性问题。采用损伤弹塑性对围岩稳定性进行分析，确定洞室开挖顺序和支护。精细化施工组织，严格控制开挖对岩体的损伤范围，并保证洞室轮廓的良好成型。及时对监测数据进行分析和反演分析，。溪洛渡地下厂房洞室群为我国已建和在建工程之首，总结其设计、开挖与支护，监测与反演等岩体工程控制措施，对类似工程具有指导和借鉴作用。 关键词：溪洛渡水电站；地下厂房；岩体工程；监测 A 文章编号：1000–6915(2013)01–0008–07 CONTROL AND MONITORING OF ROCK MASS ENGINEERING OF SUPER LARGE UNDERGROUND POWERHOUSE CAVERN GROUPS AT XILUODU HYDROPOWER STATION LI Jinhe1，WU Wenfeng2，LI JianchuanChina Three Gorges Corporation，Yichang，Hubei 443002，China；2. Yangtze River Spatial Information Technology Engineering Limited，Wuhan，Hubei 430010，China)Abstract：The underground powerhouse cavern groups at Xiluodu hydropower station in Jinsha river has huge scale and complex structure. The discontinuity of rock mass induced by the disturbed belts between bedding and inner bedding is the main geologic problem. The elastoplastic damage theory is used to analyze the stability of surrounding rock；and the excavation sequence and supporting parameters for underground caverns are determined. Based on meticulous construction organization，the extent of damage to surround rock is strictly controlled to ensure good forming of caverns outline. Real-time analysis and inversion analysis of monitoring data are conducted；and the dynamic design for supporting workload is needed. In the process of excavation，the displacement and stress change regularity. After excavation，he measured values of displacement and stress is relatively small；and the surrounding rock of underground powerhouse caverns has a good stability. The scale of underground powerhouse caverns at Xiluodu hydropower station tops the list in China. The summary from control measures for rock mass engineering such as design，excavation and support，monitoring data analysis and inversion analysis provide some references for the similar projects. Key words：Xiluodu hydropower station；underground powerhouse cav