将地质雷达法应用于钱塘江海塘南台头闸底板混凝土质量检测,简述了地质雷达测线布置情况、探测原理及数据处理流程,通过分析雷达剖面灰度图显示的反射波同相轴的振幅与频率特性,确定了混凝土与下伏淤泥质粉质粘土的分界线,查明了混凝土中钢筋的疏密情况,圈定了施工分缝及可疑充水缝隙的位置。 This paper applies the method of GPR to the concrete quality testing of the bottom of South Tantou gate in the Qiantang River Seabed, briefly describes the geodetic survey line arrangement, detection principle and data processing flow. By analyzing the radar profile gray scale, Frequency characteristics of concrete to determine the boundary between the silt and the next under the muddy silt clay to identify the density of concrete reinforcement, delineated the construction of joints and suspicious filling water gap position.