| 講演要旨(和文) | | 鳥取城堀跡が微動特性に及ぼす影響を調べるため，常時微動を用いた3成分単点観測と半径0.3mからのアレー観測を実施し，Vs=80m/s，層厚3mという堀跡埋積物を推定した上で，その影響でH/Vの周期0.2秒付近に2次卓越周期が現れることが分かった．本論文では，堀跡が微動特性に及ぼす影響をもとに、高密度微動観測によるH/V・堀跡の地図・ボーリングデータ等を比較し，それらの対応について考察を行った． |
|
|
| | 講演要旨(英文) | | From microtremor array observation, we found soft soil layer of 3 meters thickness with shear wave velocity 80 m/s at the point where old moat is buried. We also found that theoretical H/V spectral ratio from buried moat model has second dominant period around 0.2 seconds, and it is seen in observed H/V spectral ratios. In this article, we compared H/V by high density microtremor observations, moat mark distribution and borehole data to derive general microtremor characteristics due caused by buried moats. |
|
|
|
| |
|