综合物探方法在水域穿越工程中的应用研究

The Application of Integrated Geophysical Methods to Water Crossing Project

基于对水域瞬变电磁法及高密度电阻率法理论基础、技术特点及其方法局限性的分析,结合涪江穿越探测实例,提出综合运用两种方法进行地质条件探测,探讨综合物探的工作方法技术、数据采集方法、资料处理与解释方法等在水域穿越工程应用的特殊性。工程应用研究的结果表明:综合物探方法,既可以弥补水域瞬变电磁无法定量计算视电阻率的缺陷,又可以对两种方法的探测结果相互验证,排除由干扰引起的假异常,从而有效地查明了工作区域的地质条件,为顺利施工提供了基础技术保障。

Based on the analysis of the theory,technical characteristics and limitation of the transient electromagnetic method and high-density resistivity,taking Fujiang River crossing detection project as an example,this paper presents to use two methods comprehensively in geological exploration and discusses the features of the water crossing project in the working technique,data collection,data processing and interpretation methods.The research result shows that the integrated geophysical techniques can make up the defect that the water transient electromagnet cannot quantitatively calculate the apparent resistivity and it also can mutually test the detecting result of the two methods to eliminate the false anomaly caused by interference,which effectively identifies the geological conditions of the working area provides a basic technical support for the successful construction.