微动探测在城市地质勘查中的应用研究

Application research of micro-motion detection in urban geological survey

微动探测技术是近年来在强电磁干扰环境下的城市地质勘查中一种新兴的方法。该方法从采集的天然场源微动信号中提取瑞雷波频散曲线获取及面波相速度,进行反演,得出地下视横波速度结构,进而分析地下介质的结构特性。选择在郑州某地铁线作为地下空洞进行模拟试验,通过不同检波器数据处理分析,结合钻孔资料,分析该方法的适用性。

Micro-motion detection technology is a new method in urban geological survey in the environment of strong electromagnetic interference in recent years.This method extracts rayleigh wave dispersion curves and surface wave phase velocities from the collected natural field source micro-motion signals,and inverts them to obtain the underground apparent shear wave velocity structure,and then analyzes the structural characteristics of the underground medium.A subway line in Zhengzhou was selected as an underground cavity to conduct a simulation test.Through the analysis and processing of different geophone data,combined with drilling data,the applicability of the method was analyzed.