综合物探技术在深埋隧道勘探中的应用

The Application of Comprehensive Geophysical Prospecting Technique in Deep Tunnel Survey

在隧道勘察中,需查明隧道沿线地质情况,然而单一的方法难以解决深埋隧道复杂的工程地质问题,因此在实际工作中,常采用综合物探技术,来达到勘探目的。文章以福建某复杂艰险山区隧道勘探为例,探讨高频大地电磁和地震折射综合物探技术在深埋隧道勘察中的应用效果。两种方法优势互补、相互验证,查明了隧道岩性界线、断层、破碎带以及软弱岩层的发育情况,相关成果得到钻孔验证,为今后深埋隧道勘探提供一种有效的探测方案。

In tunnel investigation,it is necessary to find out the geological conditions along the tunnel,but the single method is difficult to solve the complex engineering geological problems of deep buried tunnels.In practice,integrated geophysical technique is often used to achieve the purpose of exploration.This paper discusses the application effect of high frequency magnetotelluric and seismic refraction integrated geophysical technique in exploration of a deep buried tunnel in Fujian,two methods which have complementary advantages,mutual verification of results are applied to identify the development of tunnel lithologic boundary,fault,fracture zone and weak rock formations.The exploration achievements are verified by drilling,which provides an effective detection scheme for later work.