倾斜板状体探地雷达波形特征研究  

Characteristics research of GPR wave form of oblique board

作　　者：李远强[1] LI Yuanqiang(Beijing Institute of Geology,Beijing 100120)

机构地区：[1]北京市地质研究所,北京100120

出　　处：《城市地质》2021年第1期100-106,共7页Urban Geology

摘　　要：探地雷达方法在地质勘探、工程勘探及其他勘探工作中,经常会遇到地下倾斜板状体的探测,其异常特征为沿反射波同相轴的一条斜线,倾角的解释也是依据图像倾角读取。在实际工作中发现,其数值与实际有时会存在很大的偏差,当板状体的倾向与测线方向一致时,倾斜板状体真倾角大多是大于图像倾角的;当板状体的倾向与测线方向不一致时,倾斜板状体真倾角也是大于图像倾角的,其反演计算更为复杂一些。倾角越大,偏差值也越大;倾角越小,偏差值也越小,并给出了校准计算公式。In geological,engineering geophysical and other explorations,GPR method often encounters the exploration of oblique boards.The abnormal characteristic is the existence of an oblique line along the reflection phase axis and the dip-angle is interpreted in terms of image obliquity.In practice,it is discovered that there is sometimes a great discrepancy between the actual value and the interpreted value.When the inclination of the board is the same as the line direction,the true obliquity of the oblique board is greater than the image obliquity.The true obliquity of the oblique board is also greater than the image obliquity when the inclination of the board is not the same as the line direction,and the inverse calculation is more complicated.The larger the dip-angle is,the larger the discrepancy is,and vice versa.The calibration formula is presented here.

关 键 词：倾斜板状体 探地雷达 倾角 

分 类 号：P631.3[天文地球—地质矿产勘探]