电法在公路岩溶勘察中的应用

随着公路建设的发展，岩溶作为一种典型不良地质现象在公路施工建设中的危害越来越大。采用高密度电阻率法与对称四极测深法相结合的方法进行岩溶勘察，取得了明显的效果。具体做法是先进行高密度电阻率法工作，在高密度电法视电阻率剖面发现地下电性异常处或影响工程安全性的重点位置，采用对称四极测深法进行进一步勘探工作，发挥了两种方法各自优点，提高了勘察质量。高密度电法资料处理采用经验系数法与测深曲线切线角度法相结合的方法。作为一种较新的资料处理思路，采用高密度电法测深曲线切线角度法，在以往高密度电阻率法数据采集处理基础上，实现了一种工作方法，多种解释手段的综合解释方法，提高了岩溶解释精度及其准确性。

Application of Electrical Methods to Karst Geological Survey of Highway

With the rapid development of the highway construction, the hazard of karst collapse as a typical mal-geology condition in the construction is becoming much more obvious. In this paper, the karst is explored combining the high - density resistivity method with Schlumberger sounding method and obtain better results. The specific method is firstly to adopt the high - density resistivity method to locate the site of the underground electrical resistivity anomaly or the site that influences the engineering security. Then, the Schlumberger sounding method is adopted to make further exploration. Because the advan-tages of the two methods are made full use of, the exploration quality is improved. Adopting the sounding tangent angle method, the new thought of processing data realizes the comprehensive interpretation methods by kinds of interpretation with only one task, which has raised the interpretation precision and correctness of karst collapse.