综合物探方法在某过江隧道工程勘察中的应用研究

主要介绍了地震反射波、水域高密度电法和高频大地电磁测深物探方法在过江隧道工程勘察中的应用,水域工程的物探方法首选地震反射波,但在水较浅、水底介质较硬的地方,水底多次波很严重,下覆地层的有效信号弱,难以得到理想的效果。在地震反射波方法失效的情况下,尝试采用水域高密度电法和高频大地电磁测深法探查构造低阻异常地质体,取得了一些测试成果,通过综合对比,相互佐证,提高了勘探成果的可靠程度。

Application of Comprehensive Geophysical Prospecting Method in Exploration of River-crossing Tunnel

The application of geophysical prospecting technologies, including seismic reflection wave technology, high density resistivity technology and high frequency magnetotelluric technology, in the exploration of a river-crossing tunnel is presented. The seismic reflection wave technology is the first choice for the exploration of underwater projects. When the seismic reflection wave technology is used in underwater projects where the water is shallow and the media under wa- ter is hard, the prospecting result is not so accurate. When the seismic reflection wave technology is ineffective, high density resistivity technology and high frequency magnetotelluric technology are tried and good results are achieved. The reliability of the prospecting results is improved by means of mutual comparison and verification on the prospecting results obtained by different technologies.