音频大地电磁与浅层地震在隧道地质勘查中的应用

发布时间：2018-05-08 06:28

本文选题：南水北调 + 音频大地电磁法　；参考：《地球物理学进展》2017年03期

【摘要】：针对山区长埋深隧洞勘测技术的研究,是近年来我国隧洞地质勘查中的研究热点,然而传统的钻探等手段在多山区域有很大的局限性,因此,近些年来地球物理勘探方法逐渐面向工程勘探,而单一的物探方法往往在异常判断方面存在局限性,鉴于此在工程勘探中往往运用多种地球物探方法相结合,可以在一定程度上减小了单一物探方法的多解性,提高物探解释的质量以及精度.本文以南水北调某工程为例,在某受水段分别布置了大地电磁法、地震浅层反射物探方法,其中大地电磁法主要用于辅助查明隧洞覆盖层厚度、地层岩性、隐伏构造、地下水位等工程地质条件,地震浅层反射用于查明小规模的地质构造(小断层、溶洞等)的勘查,经过这两种方法的结合,有效的查明了工程受水区的基本地质情况.
[Abstract]:In recent years, the research on the investigation technology of long buried tunnel in mountainous area is a hot topic in the tunnel geological exploration in China. However, the traditional drilling methods have great limitations in mountainous areas. In recent years, geophysical exploration methods have been gradually oriented to engineering exploration, but single geophysical exploration methods often have limitations in anomaly judgment. In view of the fact that many geophysical methods are often used in engineering exploration, It can reduce the multi-solution of single geophysical exploration method to some extent, and improve the quality and precision of geophysical exploration interpretation. Taking a project of South-to-North Water transfer as an example, magnetotelluric method and seismic shallow reflection geophysical exploration method are arranged in a certain water receiving section, in which magnetotelluric method is mainly used to assist in determining the thickness of the tunnel overburden, the lithology of the strata, and the concealed structure. The seismic shallow reflection is used to find out the exploration of small scale geological structure (small fault, cave, etc.). Through the combination of these two methods, the basic geological conditions of the engineering water-receiving area are effectively ascertained.
【作者单位】：长安大学地质工程与测绘学院;甘肃省电力设计院;
【分类号】：P631;U452.11

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