【摘要】 采用灵敏度现场测试、变化规律定性分析、统计模型定量分析等方法,对范厝水电站大坝厂房坝段坝基防渗帷幕后各测压孔扬压水位异常现象进行了综合分析。分析表明,这些测压孔扬压水位异常,主要是由于进水口部位混凝土内存在与上游水位和测压孔连通的细小裂缝,与上游水位之间不存在明显的关联性,因而不代表厂房坝段坝基防渗帷幕存在缺陷或已被削弱。更多还原

【Abstract】 In the powerhouse dam section of Fancuo Hydropower Station,abnormal foundation uplift pressures are observed in pressure holes behind the seepage-proof curtain. Based on the in-situ sensitivity testing,qualitative change analysis,and quantitative statistical analysis,this abnormality problem is analyzed. The results show that small fractures exist in the intake concrete mass and connect the reservoir water and the pressure holes. A weak correlation is found between the reservoir water level and the pressures,which means that the seepage-proof curtain still works well without damages or weakness.更多还原