矩形空洞探地雷达成像曲线厚度变化规律研究

Study on the Thickness Variation Law of Rectangular Cavity Ground Penetrating Radar Imaging Curve

由于城市基础建设不断地翻新改造,引发城市地下空洞滋生问题。通过探地雷达扫描技术,对地下矩形空洞整个探测过程进行研究,将探测过程划分为四个阶段,研究了成像曲线厚度变化规律。对探地雷达水平运行时矩形空洞的成像曲线厚度变化规律进行分析,对不同大小下的矩形空洞点测时曲线厚度进行研究,并通过实际探测案例来解释矩形空洞成像曲线厚度变化规律,结果表明探地雷达探测矩形空洞时其成像曲线厚度为先增加后减小的对称曲线,其曲线厚度最大处在图像上为水平弧段两端,位于实际矩形空洞对角线附近;雷达点测时成像曲线厚度随矩形空洞变大而增加,在图像上表现为空洞越大线条越粗。

Due to the continuous renovation and transformation of urban infrastructure,the problem of urban underground cavity is caused.Through the ground penetrating radar scanning technology,the whole detection process of underground rectangular cavity is studied.The detection process is divided into four stages,and the variation law of imaging curve thickness is studied.The thickness variation law of the imaging curve of the rectangular cavity during the horizontal operation of the ground penetrating radar is analyzed.The thickness of the rectangular cavity point measure⁃ment curve under different sizes is studied,and the thickness variation law of the rectangular cavity imaging curve is explained by the actual detection case.The results show that when the ground penetrating radar detects the rectangular cavity,the thickness of the imaging curve is a symmetrical curve that increases first and then decreases.The maximum thickness of the curve is at both ends of the horizontal arc on the image,which is near the diagonal of the actual rectan⁃gular cavity.When the radar point is measured,the thickness of the imaging curve increases with the increase of the rectangular cavity.In the image,the larger the cavity is,the thicker the line is.