2020 Volume 30 Issue 2 Pages 110-119
In order to estimate the vibration characteristics of rockfill dams flexibly, a method using microtremor measurement was investigated. In the mountainous area where the dams are located, the amplitude level of microtremors is always very small, so there is a concern that the dam body may not be sufficiently excited. Therefore, we performed measurements using several types of sensors and confirmed the validity of the measurement data. In addition, the microtremor measurements and seismic observation records were compared with respect to the amplification characteristics of the embankment, and the relationship between the two was examined. Finally, microtremors were measured at multiple points in the horizontal direction at the crest to obtain the vibration mode of the fill dam.
