CSAMT方法在隧道工程前期勘探中的运用与研究

Application and Research of CSAMT Method in the Early Exploration of Tunnel Project

CSAMT实际是一种频率测深方法,属于交流电法的一种。CSAMT法是根据电磁感应的趋肤效应,即高频电磁场穿透浅,低频电磁场穿透深的规律进行工作,通过观测人工(可控)场源在大地中激励的电磁场的频率特性来研究地电参数沿深度的变化。近年来此方法在工程勘探领域得到很好的利用和发展,为指导深部工程勘探提供很好的指向性。

CSAMT is actually a kind of frequency sounding method which belong to one of AC electrical methods. CSAMT methods works according to the skin effect of electromagnetic induction, the regularity that electromagnetic induction has stronger ability for penetrating in low frequency electromagnetic field （LFEMF） than in high frequency electromagnetic field （HFEMF）. CSAMT research the change of geo-electric parameters along the depth through observing frequency characteristic of electromagnetic field of artificial （controllable） field source excited in ground. In recent years, this method has been well used and developed in the field of engineering exploration, which provides a good direction for guiding the exploration of deep engineering projects.