| 講演要旨(和文) | | 孔隙が圧潰すると間隙水圧が上昇し, 絞り出された水はクラックを生成する. 孔隙圧潰によってどれ位間隙水圧が上昇するであろうか. この問題に対して, 孔隙率変化と間隙水圧変化の関係式を求めた. そのためには, クラックがある場合について応力〜歪関係式を新しく導く必要があった. 間隙水圧の上昇は, 媒質全体にかかる圧力の間隙水圧への配分係数β, および, フレームワーク強度のパラメタに依存する. 配分係数βは変形が降伏点を越えると増大する. |
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| | 講演要旨(英文) | | When pore crashes under the quasi-static compression, the pore-water pressure increases and the squeezed-out generates new crack. The question to be solved is how much pore-water pressure increases by pore crash. We derived the relation of the porosity change and the pore-water pressure change by the stress-strain relations, which are newly derived in the water-saturated porous media. The relation is controlled by the pore-pressure partition coefficient beta as well as the framework strength parameter kappa. The coefficient beta increases with the applied total pressure in the yielding deformation range, where the pore crash proceeds. |
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