基于三维地质雷达系统的水库堤防病害检测

Application of 3D ground penetrating radar system to monitoring underground diseases of reservoir levees

以水库堤防为研究对象,利用三维地质雷达系统提取疑似病害点位,通过双频探地雷达和实地开挖对疑似病害点位的准确性进行分析验证。结果表明:点位A1为脱空病害,脱空区域的顶部埋深为33 cm,埋深精度为93.5%,底部埋深为64 cm,埋深精度为98.4%;点位A2为疏松病害,疏松区域的顶部埋深为27 cm,埋深精度为92%,底部埋深为37 cm,受钻孔芯样破碎影响底部埋深精度为66.7%。三维地质雷达系统能够提取水库堤防地下病害的类型、位置、尺寸和埋深等信息,检测精度可以满足水库堤防病害检测应用需求。

Taking the reservoir embankment as the research object,the 3D ground penetrating radar system was used to extract the suspected disease points,and the accuracy of the suspected disease points was analyzed and verified by dual-frequency ground penetrating radar and field excavation.The results showed that point A1 was a hollowing disease,and the top burial depth of the hollowing area was 33 cm,and the burial depth accuracy was 93.5%.The bottom burial depth is 64 cm,and the burial depth accuracy is 98.4%;Point A2 was a loose disease,and the top burial depth of the loose area was 27cm,and the burial depth accuracy was 92%.The bottom burial depth is 37 cm,and the bottom burial depth accuracy is 66.7%affected by the core crushing of the drilled hole.The 3D ground penetrating radar system can extract information such as the type,location,size and burial depth of underground diseases in reservoir embankments,and its detection accuracy can meet the application needs of reservoir embankment disease detection.