高密度电法在临沂石灰岩岩溶探测中的应用

Application of High-density Electrical Method in the Exploration of Limestone Karst in Linyi City

摘要:

岩土工程勘察中需要及时、准确地查明石灰岩地基岩溶发育问题，钻探、挖掘等传统岩溶勘察方式效率低、代表性差、偶然性大，且破坏了岩体的完整性，高密度电法是研究石灰岩地基岩溶发育的高精度、无损探测技术。本文选取临沂市罗庄区岩溶发育典型地块作为研究对象，施工高密度电法测量剖面5条，对该方法在石灰岩岩溶发育中的探测与应用效果进行了分析研究，结合野外勘察钻探地质资料开挖验证，结果表明：岩溶实际发育情况与高密度电法推断结果高度吻合，应用高密度电法在研究区进行石灰岩岩溶发育情况调查是有效的。

Abstract:

In geotechnical engineering investigation, it is necessary to timely and accurately identify the development of karst in limestone foundations. Traditional karst exploration methods, such as drilling and excavation are inefficient, poor representativeness and large randomness. It also will damage the integrity of the rock mass. High density electrical methods are high-precision and non-destructive detection techniques for studying karst development in limestone foundations. In this paper, selecting typical karst development blocks in Luozhuang district in Linyi city as the study area, 5 high-density electrical survey profiles have been constructed. The detection and application effects of this method in limestone karst development have been analyzed and studied. Combining with field exploration and drilling geological data excavation verification, it is showed that actual development of karst is highly consistent with the inferred results of high-density electrical survey. The application of high-density electrical survey is effective in investigating the development of limestone karst in the study area.