| 講演要旨(和文) | | 長大な水利施設の耐震性評価を経済的に行う上で2次元表面波探査法は有効な手法と考えられる.本手法は平坦地盤を仮定して探査・解析が行われるため,現地適用に際しては測線沿いの地形の影響を把握する必要がある.このため,地形を考慮できる2次元有限差分法による粘弾性波動場計算手法により起伏地盤における探査測線の観測データを求め,これらのデータを解析して得られたS波速度断面図と地盤モデルとの比較により地形の影響を検討した.その結果,20゜以下の斜面傾斜では地形の影響が小さいことが明らかになった. |
|
|
| | 講演要旨(英文) | | The 2-D surface wave method is thought to be an effective technique in the execution of the seismic assessment of long and large water supply facilities. Because the analysis using this method is performed on the assumption of flat ground, it is necessary to understand the influence of geographical features along the survey lines before field application. Therefore, the observation data in the irregular ground were calculated by the viscoelastic wave fields calculation technique with the 2-D finite-difference method that was able to consider geographical features. And the influence of geographical features was examined by analyzing those data. As a result, it is clarified that the terrain effect is not so much when a slope angle is 20 degrees or fewer. |
|
|
|
| |
|