Abstract: Many irregular bulges and cracks appear on the asphalt concrete facing of Zhanghewan pumped storage power station. Ground penetrating radar (GPR) is used to detect the damage of facing, with the verification of core sample drilling. The results reflect that the defects only occur in the upper impervious layer, and there are no obvious defects in the drainage layer and the lower impervious layer. The engineering practice shows that the GPR is a fast, non-destructive and reliable technical means for defect detection of seepage prevention in asphalt concrete facing. At present, in construction of pumped storage power stations, the demand for rapid detection and maintenance also increases accordingly. GPR will play a larger role in this field.

Key words: ground penetrating radar, asphalt concrete facing, defect, inspection

摘要： 张河湾抽水蓄能电站沥青混凝土防渗面板出现了许多不规则鼓包和裂缝。地质雷达检测与取芯病害验证结果表明缺陷仅发生在上防渗层，排水层、下防渗层均无明显缺陷，可见地质雷达是一种能用于沥青混凝土面板防渗缺陷检测的快速、无损、可靠的技术手段。目前处于抽水蓄能电站大规模建设期，快速检测和维护保养工程需求也随之增加，地质雷达方法在沥青混凝土面板防渗结构缺陷快速检测方面必将发挥更大作用。

关键词: 地质雷达, 沥青混凝土面板, 缺陷, 检测