Abstract
Tidal suction and consolidation settlement in the coastal area often result in the occurrence of cavities beneath the pavement around quay walls. As it is difficult to detect the cavities by eyesight, establishment of the method for the detection of cavities efficiently is strongly required. This study focuses the application of microtremor measurement to the detection of cavities. Spectral characteristics of horizontal component of microtremor were found to be different from the points above cavities to the points without cavities. Considering the measurement and analysis load, the proposed method is thought to be highly applicable to the maintenance practice.
