探地雷达在滑坡和岩溶地区探测中的应用

APPLICATION OF GPR TO SLIDE SURVEY AND IMAGE FEATURE ANALYSES OF GPR DATA OBTAINED FROM KARST REGIONS

通过两个方面的应用实例,简述了探地雷达在第四纪残积土滑坡探测中的应用,即查明滑坡地域与成因有关的地层性质和变化,圈定滑坡范围、滑块边界和构组滑动面的空间形态;分析了岩溶地区不同地质和地球物理条件下探地雷达图象的基本特征,以及雷达探测的应用条件。

The application of ground penetrating radar (GPR) in two respects is introduced in this paper. Firstly, a role of GPR playing in slide survey of Quaternary remnant soil is discussed. It is indicated that the nature of the layer and its variety related to the cause of the slide can be found out, and the area of the landslide, its border and the form of the sliding plane can be defined. So ,the fundamental data of the realignment project of such a geologic calamity can be gained from GPR work. Two field examples are presented, i. e. the highway slide exploration in Xiangfan and the landslide foundering determination in Shanghai. Secondly, the GPR image features of the karst phenomenon with the various geophysi- cal conditions of the karst regions are analysed with some examples of GPR detection. The conditions of GPR application to karst geology are also summarized.