高密度电阻率法在岩溶探测中的应用

Application of High Density Resistivity Method to Karst Exploration

岩溶不仅会导致基岩面起伏很大,而且会产生较多的溶蚀带、溶洞、土洞等不良地质现象,对于建筑物的结构安全影响很大。介绍了高密度电阻率法的基本原理及特点,应用该方法对景德镇市某场地进行了岩溶探测。通过对视电阻率二维成像图异常形态、高低阻等的特征分析,推断了该场地的岩溶分布范围、大小和埋深。经钻探验证,推断结果与钻探资料吻合,为建筑物的基础设计及施工提供了重要的参考价值和指导意义。

Karst can cause not only the fluctuation of bedrock surface,but such ill geological phenomenon as dissolution belt,karst cave,soil cavity and so on,which affects the structure security of buildings greater and greater.This paper briefly introduces the basic theory and features of the high density resistivity method,with which karst exploration is carried out in a specific site in Jingdezhen.From the analysis of the abnormity and high and low resistance of visual resistance ratio 2D imaging drawing,this paper infers the karst range,size and burying depth in the site,which accords with the result of exploratory drilling,possessing guiding significance and providing important reference value to the foundation design and construction of buildings.