某混凝土面板堆石坝渗漏原因分析

Leakage Reason Analysis of a Concrete Panel Rock-fill Dam

渗漏分析是渗漏病害治理工作的重点,查明渗漏的位置、原因和路径是渗漏治理工作的关键。该文以某电站面板堆石坝渗漏分析为例,首先利用流场法对库区渗漏点进行探测,其次在流场法探测出渗漏点位置的基础上,结合坝址区工程地质特征对渗漏区进行地质分析,推测出了各渗漏区渗漏发生的原因和渗漏路径。综合分析认为,左岸硐室开挖后造成的地层结构破坏、岩体卸荷松弛、趾板区绕渗、接缝渗漏、面板破坏是形成渗漏的主要原因。

The leakage analysis is the key to leakage disease treatment.Finding out the location,cause and path of leakage is the key to leakage treatment.Taking the seepage analysis of panel rockfill dam of a power station as an example,this paper first uses the flow field method to detect the leakage point in the reservoir area.Then on the basis of the location of leakage point detected by flow field method,combined with the engineering geological characteristics of dam site area,the geological of leakage area is analysed,and the causes and leakage paths of each leakage area are inferred.According to the comprehensive analysis,the main causes of leakage are the damage of stratum structure,the relaxation of unloading of rock mass,the seepage around the toe plate,the leakage of joint and the damage of panel.