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NAOSITE : Nagasaki University's Academic Output SITE > 060 工学部・工学研究科 > 060 紀要 > 長崎大学工学部研究報告 > 第21巻 第36号 >

構造異方性を有する飽和沖積粘土の三次元強度変形特性


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タイトル: 構造異方性を有する飽和沖積粘土の三次元強度変形特性
その他のタイトル: Three-Dimensional Mechanical Properties of Saturated Alluvial Clay with Anisotropic Fabric
著者: 棚橋, 由彦 / 山中, 稔 / 持下, 輝雄
著者(別表記) : Tanabashi, Yoshihiko / Yamanaka, Minoru / Mochishita, Teruo
発行日: 1991年 1月
出版者: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
引用: 長崎大学工学部研究報告, 21(36), pp.61-68; 1991
抄録: Natural in-situ clay deposits display fabric anisotropy due to parallel alignment of their peds. The fabric anisotropy may have considerable influence on the mechanical properties of clay. Some experimental investigations on the above mentioned influence have been already done with tri-axial and direct shear, except true tri-axial testing apparatus. Presented herein is an experimental study of the influence of the fabric anisotropy on the mechanical properties of saturated alluvial clay under three dimensional stress condition with true tri-axial testing apparatus. Tests as follows were carried out on cubical specimen of saturated alluvial clay with combination of cutting angle β between the principal stress direction and sedimentary plane and b-value. (1) One-direction restrained consolidation test (2) Two-direction restrained consolidation test (3) Isotropic consolidated undrained (CIU) shear test (4) Ko-consolidated undrained (CKoU) shear test From these test results, some three-dimensional mechanical properties were clarified as follows: (1) The ratio of the anisotropic stress ratio at rest K13 to K12 may be useful as a quantitative index for the anisotropic fabric. (2) K13/K12 increases with increasing cutting angle β, and reachs about unity at β=90° degree. (3) Alluvial clay with the anisotropic fabric has a deformation characteristics as a cross anisotropy material. (4) Both excess pore water pressure and effective stress ratio at failure are subjected larger influence in extension (b=0.5-1.0) rather than in compression (b=0) due to the anisotropic fabric.
URI: http://hdl.handle.net/10069/24333
ISSN: 02860902
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第21巻 第36号

引用URI : http://hdl.handle.net/10069/24333

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