Abstract
A high-resolution geological survey by high frequency seismic wave has been developed. This method is designed to transmit a pseudo random wave of desired frequency. We can measure an accurate geological structure between wells separated by a long distance. We conducted this new method to locate a firm siltstone accurately for the pile foundation work of multi-storey car park in Chubu international airport. Accurately visualized image of the firm siltstone layer enabled us to design exact lengths of the pile foundation. We compared the actual cost of the foundation work with the cost estimated by designing based upon only boring log and found that we saved 40% of cost of foundation work by this new method.
