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灰岩地区溶蚀现象较为普遍,其中的溶蚀带、溶洞等不良地质现象会严重影响基础工程质量与施工进度。通过对某高速公路路基地质条件和地球物理特征的分析,采用高密度电法结合地震映像法和瑞雷面波法对岩溶发育地段进行了对比探测,根据电阻率断面图结合地震波场特征,综合分析、判断、划分出不同的岩溶类型。经过钻探验证表明,该方法在灰岩地区的应用具有实际效果和应用前景。
Limestone area erosion is more common, including the erosion zone, karst cave and other adverse geological phenomena will seriously affect the quality of foundation works and construction progress. Based on the analysis of geological conditions and geophysical characteristics of a highway subgrade, the high density electrical method was used to compare the karst development zones with the seismic mapping method and the Rayleigh surface wave method. Based on the resistivity profile and the characteristics of the seismic wave field, Analysis, judgment, divided into different types of karst. After drilling verification shows that the application of this method in limestone area has practical effect and application prospect.