Deformation behavior of offshore artificial island

近海人工岛变形行为

• 批准号: 10650494
• 负责人: SHIBATA Toru
• 金额: $ 1.34万
• 依托单位: FUKUTAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650494/
• 关键词: Reclaimed Land; Settlement analysis; Strain rate; Temperature; RI-Cone Penetrometer; Modeling of Ground; Compressibility; Aging; 地盤モデル化; 圧縮特性; 沈下予測; 液性限界; ベーン試験; フォールコーン試験

In this research work, (1) analytical case studies of ground settlement on the basis of rheological aspect, (2) measurement of profiles of subsoil using RI-Cone penetrometer and (3) experimental investigation on the relationship between the physical properties and mechanical properties of clays are performed.(1) The compressibility in one-dimensional consolidations of clays is mainly influenced by strain rate (ε) and temperature (T), and several experimental studies on these factors have recently been performed. On the basis of these results, Shibata quantified the combined effect of εand T as follows.If the stress-strain curves obtained by Constant Rate of Strain Oedometer tests at [TィイD21ィエD2 : εィイD21ィエD2] and at [TィイD22ィエD2 : εィイD22ィエD2] coincide, behavior is controlled by a relationship between ε and T as εィイD21ィエD2/εィイD22ィエD2≒(TィイD21ィエD2/TィイD22ィエD2)ィイD11/2ィエD1.(2) Radioisotope cone penetrometer (RI-Cone) has been successfully applied to actual site investigation at various locatio … More ns in the world. In this research work, two types of RI-Cones, Neutron-Moisture Cone penetrometer and Nuclear-Density Cone penetrometer were applied for two clayey deposits and two sandy deposits. For all site, the natural water content and wet density profiles measured with RI-Cones have been compared with the data obtained from laboratory tests carried out for undisturbed samples. On the basis of the fact that they show good agreement for both clay and sand deposits, RI-Cone are found to be versatile tools for subsoil investigation.(3) In this research, the correlation of liquid limit with some mechanical properties of reconstituted remolded clays are investigated. On the basis of the experimental results, compressibility of clays are uniquely related to the normalized void ratio as follows.(e-eィイD2minィエD2)/(wィイD2LィエD2-wィイD2L,minィエD2)=f(p)It was also shown that the normalized void ratio is the useful measure for quantitative evaluation of compressibility of natural sedimentary clay deposit. Less

本文的研究工作包括：(1)基于流变学的地基沉降分析实例；(2)用RI-Cone贯入仪测量地基土的剖面；(3)粘土物理性质与力学性质之间关系的试验研究。(1)粘土一维固结中的压缩系数主要受应变率(ε)和温度(T)的影响，近年来已有一些关于这些因素的试验研究。在这些结果的基础上，柴田将ε和T的联合效应量化为：如果在[TィイD21ィエD2：εィイD21ィエD2]和[TィイD22ィエD2：εィイD22ィエD2]处通过恒定应变速率测得的应力-应变曲线重合，由于εィイD21ィエD2/εィイD22ィエD2≒(TィイD21ィエD2/TィイD22ィエD2)ィイD11/2ィエD1.(2)放射性同位素锥体渗透仪(RI-ε)已成功地应用于不同位置的现场勘察，因此其行为受…与T之间的关系控制世界上有更多的美国人。在这项研究工作中，两种类型的RI-圆锥，即中子-水分圆锥渗透仪和核密度圆锥穿透仪被应用于两个粘土和两个砂质沉积物。对于所有场地，用RI-CONTES测量的自然含水率和湿密度剖面与对未受干扰的样品进行的实验室测试所获得的数据进行了比较。由于RI-Cone对于粘土和砂土都表现出很好的一致性，因此被认为是一种通用的地基勘察工具。(3)本文研究了重塑粘土的液限与某些力学性质的相关性。根据实验结果，粘土的可压缩性与归一化孔隙率的关系式为：(E-eィイD2minィエD2)/(wィイD2LィエD2-wィイD2L，minィエD2)=f(P)。此外，归一化孔隙率是定量评价天然沉积粘土矿床可压缩性的有效指标。较少

项目成果

柴田徹: "粘土の液性限界の測定法に関する研究"福山大学工学部紀要. 22巻. 31-38 (1998)

柴田彻：“粘土液限测定方法的研究”福山大学工学部通报第 22 卷 31-38（1998 年）。

柴田徹: "練返し再構成粘土の圧密特性"第53回土木工学会年次学術講演会講演概要集. 396-397 (1998)

Toru Shibata：“再生粘土的固结特性”土木工程师学会第 53 届学术年会摘要 396-397（1998）。

T. Shibata: "A study on Measuring Method of the Liquid Limit of Clays"The memoirs of the fuculty of ENG. Fukuyama Univ.. Vol.22, No.1 (in Japanese). 31-38 (1998)

T. Shibata：“粘土液限测量方法的研究”ENG 系回忆录。

A. Nishihara: "Compressibility of Dilluvial Clay in Fukuyama"Proc. 51th Annual Conf. Chugoku Branch of JSCE. (in Jaoanese). 401-402 (1999)

A. Nishihara：“福山洪积粘土的可压缩性”Proc。

柴田徹: "粘土の液性限界について"第50回土木学会中国支部研究発表会概要集. 261-262 (1998)

柴田彻：《论粘土的液限》第50届日本土木工程学会中国分会研究报告摘要集261-262（1998）。