日本語フィールド
著者:柴 錦春、Bergado, D. T. and Shen, S.-L. 読み: チャイ ジンチュン、Bergado, D. T. and Shen, S.-L.題名:平面ひずみ解析におけるバーチカルドレーンで改良した地盤のモデリング発表情報:Ground Improvement, Proceedings of Institute of Civil Engineers, UK, Vol 166, No. 2, pp. 13-21. 巻: 166 号: 2 ページ: 12-21キーワード:バーチカルドレーン、地場改良、有限要素法解析概要:抄録:The methods for modeling the effect of prefabricated vertical drain (PVD) in plane strain finite element analysis have been reviewed. The methods are classified into 4 groups of using: (1) solid element; (2) macro-element; (2) one-dimensional (1D) drainage element; and (4) equivalent vertical hydraulic conductivity (kve) to model the effect of the PVD, respectively. With the kve method, a PVD improved subsoil can be analyzed the same as for an unimproved one. For all the methods, the average degree of consolidation in a plane strain analysis is matched with that under an axisymmetric condition by modifying the hydraulic conductivity of subsoil, and/or the spacing or the discharge capacity of plane strain drains. Finally, the effectiveness of the kve method has been demonstrated by modeling a large scale model test of PVD consolidation. The numerical results indicate that the kve method performs as good as that of explicitly modeling the PVD consolidation under axisymmetric condition.英語フィールド
Author:Chai, J.-C., Bergado, D. T. and Shen, S.-L.Title:Modeling PVD improved ground in plane strain analysisAnnouncement information:Ground Improvement, Proceedings of Institute of Civil Engineers, UK, Vol 166, No. 2, pp. 13-21. Vol: 166 Issue: 2 Page: 12-21Keyword:Prefabricated vertical drain, ground improvement, finite element analysisAn abstract:The methods for modeling the effect of prefabricated vertical drain (PVD) in plane strain finite element analysis have been reviewed. The methods are classified into 4 groups of using: (1) solid element; (2) macro-element; (2) one-dimensional (1D) drainage element; and (4) equivalent vertical hydraulic conductivity (kve) to model the effect of the PVD, respectively. With the kve method, a PVD improved subsoil can be analyzed the same as for an unimproved one. For all the methods, the average degree of consolidation in a plane strain analysis is matched with that under an axisymmetric condition by modifying the hydraulic conductivity of subsoil, and/or the spacing or the discharge capacity of plane strain drains. Finally, the effectiveness of the kve method has been demonstrated by modeling a large scale model test of PVD consolidation. The numerical results indicate that the kve method performs as good as that of explicitly modeling the PVD consolidation under axisymmetric condition.