Trial Construction of Mini-Triaxial Apparatus and Method for Determining Mechanical Parameters of Seabed Clay Deposits

海底粘土沉积物力学参数测定微型三轴装置及方法的试制

• 批准号: 01850115
• 负责人: MATSUI Tamotsu
• 金额: $ 3.39万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B).
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850115/
• 关键词: Alluvial Clay; Diluvial clay; Consolidated Undrained shear; Triaxial Compression Test; Time Dependency; Shear Strength; Size Effect; Oedometer test; 堆積環境; 変形係数; 圧密非排水試験; 応力-ひずみ曲線; 海底堆積粘土(不撹乱粘土); 三軸圧縮試験; 三軸圧縮試験機; 寸法効果

A series of numerical analysis was performed in the case where the size of triaxial test specimen is varied, in order to investigate the effect of the size of triaxial test specimen on the results of triaxial test analytically. As the results, it is confirmed that there is no effect of the size of triaxial test specimen on the shear characteristics. It is confirmed that triaxial test specimen is sheared homogeneously if the friction between the edge of the specimen and the loading plate could be excluded.Mini-Triaxial test apparatus and Mini-Triaxial test apparatus for medium pressure was made on an experimental basis. Mini-Triaxial test apparatus is mainly used for alluvial clays and Mini-Triaxial test apparatus for medium pressure is used for diluvial clays deep under the ground. Common feature of both apparatus is that the size of these specimen, phi22.6mmXh45mm, is smaller than the size of specimen usually used.A series of triaxial test was performed in the case where the test spec … More imen is varied as phi50mmXh120mm, phi35mmXh80mm and phi22.6mmX45mm, in order to investigate the effect of the size of triaxial test specimen on the results of triaxial test experimentally. So that, it is confirmed that there is no effect of the size of triaxial test specimen on the shear characteristics on an experimental.At first year of Heisei, a series of shear test was performed for undisturbed alluvial clays and upper diluvial clays with mini-triaxial apparatus. As the results, it is confirmed that even if the samples are picked in the same clay layer but at the different position, the mechanical characteristics of clays is not same, and that even if the samples are picked at the same position but at the different depth, the mechanical characteristics of clays is not same.At second year of Heisei, a series of shear test was performed for undisturbed diluvial clays with mini-triaxial apparatus for medium pressure. Some parameters of the constitutive equation for clays were tried to determine using the experimental results. Less

为了解析研究三轴试件尺寸对三轴试验结果的影响，在三轴试件尺寸不同的情况下进行了一系列数值分析。结果表明，三轴试件的尺寸对试件的剪切特性没有影响。如果排除试件边缘与加载板之间的摩擦，则证实三轴试件剪切是均匀的。在实验基础上研制了微型三轴试验装置和微型三轴介质压力试验装置。小三轴试验装置主要用于冲积粘土试验，中压小三轴试验装置主要用于地下深处的冲积粘土试验。这两种仪器的共同特点是，这些样品的尺寸，phi22.6mmXh45mm，比通常使用的样品尺寸要小。在试验规格为phi50mmxh20mm、phi35mmXh80mm和phi22.6mmX45mm的情况下，进行了一系列的三轴试验，以研究三轴试件尺寸对三轴试验结果的影响。从而证实了试验中三轴试件的尺寸对剪切特性没有影响。平成元年，利用微型三轴仪对原状冲积土和上冲积土进行了一系列剪切试验。结果表明，即使在同一粘土层不同位置采收样品，土体的力学特性也不相同；即使在同一位置不同深度采收样品，土体的力学特性也不相同。平成第二年，采用小型三轴中压试验装置对原状洪积土进行了一系列剪切试验。利用试验结果确定了粘土本构方程的一些参数。少

项目成果

MATSUI, T.: "Shear Characteristics of Diluvial Clays with Mini-Triaxial Test for Medium Pressure" Proc. of annual meeting of J. S. C. E in Kansai Chapter. (1991)

MATSUI, T.：“中压微型三轴试验洪积粘土的剪切特性”Proc。

MATSUI, T.: "Development of Mini-Triaxial Test Apparatus and its Application of Sea Deposit Clays" Proc. of annual meeting of J. S. S. M. F. E. 603-604 (1990)

MATSUI, T.：“微型三轴试验装置的研制及其在海沉积粘土中的应用”，论文集。

松井 保・小田 和宏・鍋島 康之・北畠 肇: "ミニ三軸圧縮試験機の試作とその適用について" 土木学会関西支部発表講演概要集. 33 (1990)

Tamotsu Matsui、Kazuhiro Oda、Yasuyuki Nabeshima 和 Hajime Kitabatake：“微型三轴压缩试验机的原型制作及其应用”日本土木工程师学会关西分会演讲摘要 33（1990）。

松井保,小田和広,鍋島康之,北畠肇: "ミニ三軸圧縮試験機の試作とその適用について" 平成2年度土木学会関西支部年次学術講演概要.

Tamotsu Matsui、Kazuhiro Oda、Yasuyuki Nabeshima、Hajime Kitabatake：《微型三轴压缩试验机的原型制作及其应用》日本土木工程学会关西分会 1990 年度学术讲座摘要。

松井 保・小田 和広・鍋島 康之・北畠 肇: "中圧ミニ三軸試験機による大阪湾洪積粘土の力学特性" 土質学会発表講演概要集. (1991)

Tamotsu Matsui、Kazuhiro Oda、Yasuyuki Nabeshima 和 Hajime Kitabatake：“使用中压微型三轴试验机研究大阪湾洪积粘土的机械特性”在日本地质科学学会发表的演讲摘要集（1991 年）。