地质雷达属性分析技术在路基检测中的应用

Application of Geological Radar Attribute Analysis Technology in Earthworks Testing

采用地质雷达进行路基检测时,由于现场检测环境多变,检测对象类型多样,地质雷达反射波直观特征较为复杂,检测结果存在多解性问题且未得到较好解决。通过对不同类型地质雷达属性技术进行研究,分析了铁路路基常见的几种病害所对应的敏感属性特征。结果表明:路基病害与地质雷达属性参数具有明显相关性,其中翻浆冒泥病害的雷达图像,呈现高振幅低频率、同相轴连续的特征;含水异常病害的雷达图像频率随时间衰减较快,呈现连续多次反射的特点。因此,不同类型的地质雷达属性能从特定角度反映路基病害的雷达反射波特征,通过精细属性分析,可以较好地区分不同路基病害类型,提高地质雷达病害解释精度。

When geological radar is used for earthworks testing,the visible characteristics of the reflected wave of geological radar are relatively complex due to variable field testing environment and various types of testing objects,resulting in multi-solution problems that are not well solved.Based on the study of different types of geological radar attribute technologies,this paper analyzes the sensitive attribute characteristics corresponding to several common diseases in railway earthworks.The results show that earthworks diseases have a good correlation with geological radar attribute parameters,among which the radar image of the mud-pumping disease presents the characteristics of high amplitude,low frequency and continuous coaxial axis;the radar image frequency of water-bearing abnormal disease decreases rapidly with time and presents the characteristics of continuous multiple reflections.Therefore,different types of geological radar attributes can mirror the reflected radar wave characteristics of earthworks diseases from a specific perspective.Through detailed attribute analysis,different types of earthworks diseases can be better distinguished and the interpretation accuracy of geological radar diseases can be improved.