Time-dependent behavior of undisturbed Pleistocene deposits and its prediction method

原状更新世沉积物的时间依赖性行为及其预测方法

• 批准号: 06555143
• 负责人: MATSUI Tamotsu
• 金额: $ 0.77万
• 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555143/
• 关键词: strain path control; digital pressure-volume control device; mini-triaxial test; remolded saturated clay; strain increment ratio; デジタル圧力・体積変換器; 不撹乱洪積粘土; 力学挙動; ひずみの状態量; 隆伏基準; 塑性ポテンシャル; 予測手法

A series of strain path control tests was carried out to investigate fundamental mechanical behavior of remolded clays in strain path control mini-triaxial tests. The outline of this research was summarized as follows ;1. The authors decided the applicable range of strain incremental ratios, which was the ratio between volumetric and axial strain increments, based on undrained test data of remolded clays. Using these strain incremental ratios (0-0.41), a series of strain path control mini-triaxial tests was carried out.2. The mechanical behavior in strain path control tests was different from that in undrained or drained tests. Especially, relationship between deviator stress and axial strain was quite different, in which deviator stress repidly increased as increasing strain increment ratio. This phenomenon can be explained by the interaction between volume change due to digital pressure volume control device (DPVC) and dilatancy of clay.3. The mechanical behavior of remolded clays was also different from that of sands in strain path control tests. Consequently, it is essential to investigate mechanical behavior of soils based on strain path.

通过应变路径控制的小型三轴试验，研究了重塑粘土的基本力学特性。本研究的主要内容如下：1.根据重塑粘土的不排水试验资料，确定了体积应变增量与轴向应变增量之比应变增量比的适用范围。利用这些应变增量比（0-0.41），进行了一系列应变路径控制的小型三轴试验.应变路径控制试验中的力学行为与不排水或排水试验中的力学行为不同。特别是偏应力与轴向应变的关系有很大不同，偏应力随应变增量比的增大而迅速增大。这一现象可以用数字压力容积控制装置（DPVC）引起的容积变化与粘土的粘性相互作用来解释.在应变路径控制试验中，重塑粘土的力学行为也不同于砂土。因此，基于应变路径的土体力学行为研究是十分必要的。

项目成果

松井 保・小田和広・鍋島康之: "ミニ三軸試験による泉州地域海底年度の力学パラメーターに関する研究" 海底地盤シンポジウム′94発表論文集. 107-112 (1994)

Tamotsu Matsui、Kazuhiro Oda、Yasuyuki Nabeshima：“通过微型三轴试验研究 Senshu 地区海底年份的力学参数”海底岩土工程研讨会论文集 94（1994）。

Matsui T.et al.: "Mechanical behavior of remolded clay in strain path control mini-triaxial tests" Proc.of 51th Annual Conference of JSCE,JSCE. (in press). (1996)

Matsui T.et al.：“应变路径控制微三轴试验中重塑粘土的力学行为”，JSCE第51届年会论文集，JSCE。

松井 保、他: "ひずみ経路制御ミニ三軸試験機の試作と練返し粘土への適用" 地盤工学研究発表会. 3-1(印刷中). (1996)

Tamotsu Matsui 等人：“应变路径控制微型三轴试验机原型及其在捏合粘土中的应用”岩土工程研究会议（1996 年）。

Matsui T.et al.: "Development of strain path control mini-triaxial apparatus" Proc.of Annual Conference of JSCE Kansai Chapter, JSCE Kansai Chapter. (in press). (1996)

Matsui T.et al.：“应变路径控制微型三轴装置的开发”，JSCE 关西分会年会论文集，JSCE 关西分会。

松井保 他: "ひずみ経路制御ミニ三軸圧縮試験機の試作と練返し粘土への適用(印刷中)" 地盤工学研究発表会. 3-1. (1996)

Tamotsu Matsui 等人：“应变路径控制微型三轴压缩测试仪的原型及其在捏合粘土中的应用（正在出版）”岩土工程研究会议（1996 年）。