摘要
为了研究大型水电站地下洞室围岩变形问题,以白鹤滩水电站为例,对比分析了多点位移计、声波测试、高精度微震监测所收集的资料,归纳了白鹤滩水电站右岸地下厂房开挖过程中的损伤区特征、变形规律。研究结果表明:围岩变形量增加速率与开挖强度具有密切关系;主厂房上游侧位移大于下游侧,围岩损伤更严重;上游层状节理密度比下游大是造成上下游变形差异的主要原因。研究结果可为白鹤滩水电站地下厂房下一步的开挖和支护方案设计提供重要依据。
In order to study the rock deformation of underground cavities in Baihetan Hydropower Station, the data from multi - point displacement meter, acoustic wave test, and high precision micro - seismic monitoring were comparatively analyzed. And on this basis, the characteristics of damaged zone and deformation patterns during the excavatiou of the underground plants on right bank were summarized. The results showed that the increasing rate of surrounding rock deformation was closely related to the excavation intensity; the upstream wall displacement of the main powerhouse was larger than that of the downstream wall. The bedding joint of the upstream side is more than that of the downstream side, which was the main contribution to the deformation differences between upstream and downstream. The research results provided important references for next excavation and reinforcement of underground caverns on the right bank of Baihetan Hydropower Station.
出处
《人民长江》
北大核心
2017年第21期61-66,共6页
Yangtze River
基金
国家自然科学基金面上项目(51374149)
关键词
地下厂房
层状节理
微震监测
变形特征
围岩损伤
白鹤滩水电站
underground powerhouse
bedding joint
micro seismic monitoring
deformation characteristic
surrounding rock damage
Baihetan Hydropower Station
