城市道路病害特征地质雷达正演模拟及快速识别

地质雷达(ground-penetrating rader,GPR)探测是城市道路病害探测的主要手段,随着技术的更新,实现了从二维到全三维探测的过渡,但数据解释还是以常规的波形特征和振幅特征分析为主的剖面和平面异常解释,存在解释工作量大,异常识别难度大,漏判、错判率高等特点。为提高地质雷达数据解释速度和精度,通过对路面检测中常见的异常体(空洞、积水区)正演模拟,并结合实际案例分析,研究异常体的频谱特征,提出基于数学变换的频谱分析方法,实现对空洞、积水区的快速识别。结果表明,基于频谱分析的频谱剖面异常特征明显优于振幅剖面特征。

GPR forward modeling and rapid identification technology of urban road disease characteristics

GPR detection is the main means of the urban road diseases. with the updating of the GPR, has realized the full 3D from 2D to the transition, but our progress has been slow in data interpretation, interpretation method with the conventional profile analysis of characteristics of amplitude and waveform is given priority to, work in the interpretation of the need to do a lot of work, and the recognition of abnormal accuracy is not high, there are characteristics of high rate of false negative.Common abnormal body in this article through to the road detection (cavitation, water area) forward modeling, combined with the actual case analysis, summarizes the abnormal body in profile, the amplitude of the frequency spectrum characteristics, and puts forward a kind of frequency spectrum analysis method based on mathematical transform, realize the hole, the rapid identification of water area, in the project application shows that is based on the analysis of the spectrum amplitude is obviously better than the spectrum anomaly characteristics of the section profile features.