微動測定によるバンコク地盤・深部地下構造の推定(<特集>インフラ海外展開における地盤分野の取組み)

概要

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A wide range of micro-tremor observation was conducted in Bangkok metropolitan area to estimate the deep underground soil structure which is essential to predict long-period ground motion. We calculated the H/V spectrums of micro-tremor and estimated subsurface velocity profile down to seismic bedrock. And we compared these H/V spectrums with SH wave amplification function and also with theoretical Rayleigh wave amplification ratio H/V. It was clarified that there was a deep basin in Bangkok metropolitan area. And it was also proved that H/V spectrums of micro-tremor coincided with SH wave amplification function and also with theoretical Rayleigh wave amplification ratio H/V very well.
2012-09-01