高密度电法在工程岩溶勘探中的应用

Application of High-density Electrical Method to Karst Exploration

高密度电法是一种直流电法勘探技术,具有测点密度高,信息量大,对探测对象不造成损伤,成果直观、准确、高效等特点而被广泛应用于岩溶勘察中。论述了其原理、技术方法并通过桥梁基础勘察和隧道工程两个应用实例,论述了高密度电法在桥基灰岩地层中圈定溶洞和在隧道内确认破碎带的应用,最后通过后期打钻证实高密度电法是岩溶勘探中一种可行有效的勘察方法。

The high-density electrical method is a kind of direct-current electrical exploration technology which is widely used in engineering karst exploration due to its characteristics of the high density of measuring points,a large amount of information,little damage to the probing objects,clear,accurate and efficient results etc..This paper firstly elucidates its principle and technical methods.And then taking the bridge foundation exploration and the tunnel construction project as cases,it introduces the application of the high-density electrical method to locating karst in bridge limestone formation and determining tunnel crushed zones.Finally,through the later stage of drilling,it proves the high-density electrical method is a good method in karst exploration.