A Study on Behavior of Clay Ground Subjected to High Temperature Histories

粘土地基高温历史行为研究

• 批准号: 14550495
• 负责人: MORIWAKI Takeo
• 金额: $ 2.3万
• 依托单位: Kure National College of Technology (2003)Hiroshima University (2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550495/
• 关键词: Effect of High Temperature; Alluvial Clay; Consolidation Properties; Shear Properties; Microstructure; Centrifuge Model Test; High Temperature Triaxial Test

Triaxial, centrifuge model and consolidation tests have been carried out under temperatures up to 80°C to clarify the mechanical properties of clay.From the triaxial test, at first, when clay was heated, the pore water and clay particles expand, which gives to rise to an increase in pore water pressure. As the result, secondary consolidation was accelerated. Next, when clay was cooled down, swelling of clay as much as 3% was occurred. As the result, shear strength was increased because of remade adsorbed water. This phenomenon was called as solidification of soil structure in this study.From the centrifuge model test, shear strength of clay ground was also increased by acceleration of secondary consolidation and solidification of soil structure.From the consolidation test, effect of high temperature was doubled coefficient of permeability.From these test results, high temperature effect has two special properties. One is increasing shear strength. Another is shorting the consolidation time. Therefore, there is a possibility of using high temperature effect for improvement of soft ground.

在温度高达80°C的条件下进行了三轴试验、离心模型试验和固结试验，以明确粘土的力学性质。从三轴试验中可以看出，首先，当粘土被加热时，孔隙水和粘土颗粒膨胀，导致孔隙水压力增加。其结果是，次固结加速。接下来，当粘土冷却下来时，发生多达3%的粘土溶胀。结果表明，由于吸附水的重新生成，剪切强度得到了提高。离心模型试验结果表明，次固结和结构性固结的加速作用使粘性土地基的抗剪强度提高;固结试验结果表明，高温的影响是渗透系数的两倍。一是提高抗剪强度。另一个是缩短整合时间。因此，利用高温效应加固软土地基是可行的。

项目成果

森脇武夫, 松本賢弥, 舛田智江, 李 康日: "粘土の強度・変形特性に及ぼす高温履歴の影響"土木学会中国支部第55回研究発表会発表概要集. 291-292 (2003)

Takeo Moriwaki、Kenya Matsumoto、Tomoe Masuda、Kangichi Li：“高温历史对粘土强度和变形性能的影响”日本土木工程学会中国分会第 55 届研究会议论文集 291-292（2003 年）。 ）

Moriwaki, T., Matsumoto, K., Kinoshita, H.: "Temperature effects on microstructure of clay"Proceedings of the 57th Annual Conference of JSCE. 695-696 (2002)

Moriwaki, T.、Matsumoto, K.、Kinoshita, H.：“温度对粘土微观结构的影响”JSCE 第 57 届年会论文集。

Moriwaki, T., Tsuchida, T., Matsumoto, K, Takehobu, M.: "Strength deformation characteristic of Hiroshima bay clay under high temperature"Proceedings of the 39th Japan National Conference on Geotechnical Engineering. (in press). (2004)

Moriwaki, T.、Tsuchida, T.、Matsumoto, K、Takehobu, M.：“高温下广岛湾粘土的强度变形特性”第39届日本全国岩土工程会议论文集。

森脇武夫, 松本賢弥, 木下洋樹: "粘土の微視的構造に及ぼす温度効果"土木学会第57回年次学術講演会講演概要集. III-348. 695-696 (2002)

Takeo Moriwaki、Kenya Matsumoto、Hiroki Kinoshita：“温度对粘土微观结构的影响”日本土木工程师学会第 57 届学术年会摘要 III-348（2002 年）。

森脇武夫, 土田 孝, 松本賢弥, 竹信正寛: "高温環境下における広島港粘土の変形強度特性"第39回地盤工学研究発表会発表講演集. III(発表予定). (2004)

Takeo Moriwaki，Takashi Tsuchida，Kenya Matsumoto，Masahiro Takenobu：“高温环境下广岛港粘土的变形强度特性”第39届岩土工程研究会议论文集（2004年）。