摘要
Abstract
Microtremor survey technology has the characteristics of high efficiency,non-destructive,environmental pro-tection,and good economic benefits.In order to overcome the shortcomings of traditional microtremor technology,a new engi-neering geological microtremor survey system has been developed by developing software,continuously optimizing iterative in-terpretation algorithm,field workflow,and other measures,so as to improve the application range and interpretation accuracy of microtremor technology.This technology is based on the extended spatial autocorrelation(ESPAC)theoretical algorithm and the H/V spectral ratio method.It uses a linear array to obtain core parameters such as phase velocity,H/V spectral ratio,peak frequency,etc.Through comprehensive analysis,it can quickly and intuitively obtain the geospatial distribution informa-tion of abnormal bodies,cooperate with geological mapping and drilling to find out the engineering geological conditions of sites along the tunnel project,and provide necessary engineering geological data for line design and construction.Taking a tunnel survey as an example,this paper interprets and infers the abnormal body of the tunnel by using the microtremor survey technol-ogy by linear array,high-density electrical method,and other comprehensive geophysical methods,combined with the geolog-ical conditions,and divides several abnormal zones and lithologic contact zones.The conclusion is consistent with the drilling and field geological mapping.Theory and practice show that the engineering geological microtremor survey technology has a-chieved good results in tunnel investigation and can be popularized and applied.关键词
直线型台阵微动技术/H/V谱比法/综合物探方法/隧道工程Key words
microtremor survey technology by linear array/H/V spectral ration method/integrated geophysical method/tunnel project分类
地质学
