Application of comprehensive geophysical prospecting method in karst geologic survey of Xiamen-Chengdou Expressway

摘要

Karst is the grave geologic hidden trouble in the infrastructure construction such as expressway and railway and it is one of the important means of karst geologic survey that karst is detected with the geophysical method. Because karst caves are quite different from their surrounding rock on physical property such as density, speed and electrical property, the paper implements karst geologic survey in Ruijin-Ganzhou section of Xiamen-Chengdou Expressway with comprehensive geophysical prospecting methods such as seismic imaging, transient Rayleigh Wave and 2D Resistivity imaging survey. The result shows distribution scope, burial depth and development conditions of karst in the limestone region can be effectively found out.