探地雷达管道探测资料定性与定量解释方法研究及应用

Study and application of qualitative and quantitative interpretation methods for pipeline detection data from ground penetrating radar

本文利用探地雷达(GPR)记录上管道回波同相轴的运动学与动力学特征对管道材质(金属管道、非金属管道)和管道断面形态(圆形、矩形、马蹄形)进行分析判断,并对GPR记录上管道异常与空气波干扰的识别与区分进行定性解释。利用GPR探测资料定量解释管顶中心位置、管道走向与管顶埋深,并详细介绍了利用管顶回波同相轴的双曲线特征反演管顶上部雷达波速度的原理及两种求取管道半径的方法及其应用条件。结果表明:探地雷达用于管道实际探测资料的定性与定量解释具有有效性与实用性。

The method for the qualitative and quantitative interpretation of underground pipeline data from ground penetrating radar(GPR)is introduced.The qualitative explanations including using GPR to record kinematics and dynamics characteristics of the echo of the pipeline axis with different pipe materials and different pipe cross sections are analyzed,and the abnormal wave interference with air is identified and distinguished.The quantitative interpretation includes the determination of the position of the top center,the direction of the pipeline and the determination of the depth of the pipe top.The principle of the velocity of radar wave at the top of the tube inverted by the echo of pipe top axis is introduced in detail.The principle and application conditions of the two methods for obtaining pipe radius are introduced.The validity and practicability of these methods are verified by applying each interpretation method to the qualitative and quantitative interpretation of the actual pipeline data.