Microscopic study on crushability and compressibility of residual soils

残余土的破碎性和压缩性的微观研究

• 批准号: 09650541
• 负责人: KUSAKABE Osamu
• 金额: $ 2.24万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650541/
• 关键词: particle crushing; residual soils; Geotechnical Engineering; 風化; 破砕性; マサ土; せん断; 圧縮性; 徴視的挙動; 粒子; 微視的挙動

We consider that phenomena of particle crushing should be regarded as progressive and time dependent behaviour. The outcomes of the research maybe summarized in the following four points.(1) Evidences of time dependent behavior related to particle crushing have been gathered from a comprehensive literature survey and categorically summarized. It has become clear that time dependent behavior can be observed with particle crushing, without dissipation of pore water pressure(2) Crushing characteristics of single particle were studied by conducting a series of crushing tests on quarts particles obtained from weathered granite at Hiroshima prefecture. It was found from the tests that crushing strength depends on particle size and the probability of occurrence of the number of fracture exponentially decreases.(3) One dimensional compression tests were carried out on the specimens formed by a stack of crushable cylindrical materials, from which observed failure mechanisms were classified. It was found that the accumulated number of crushed cylinders reached at 30% when the compression curve exhibits yielding and the two distinct mechanisms were split failure and compression failure a the contact points.(4) Long-term Two dimensional bearing tests of rigid footing were conducted for the model ground consisting of crushable cylinders. It was confirmed that the time-dependent behavior was observed and the formation of slip line was strongly associated with the rotation of the cylinders.

我们认为，颗粒破碎现象应被视为渐进的和时间相关的行为。本研究的成果可以概括为以下四点。(1)从全面的文献调查中收集了与颗粒破碎相关的时间依赖性行为的证据，并进行了分类总结。（2）通过对取自广岛县风化花岗岩的石英颗粒进行一系列破碎试验，研究了单颗粒的破碎特性。从试验中发现，压碎强度取决于颗粒尺寸和发生的概率的断裂数量呈指数下降。(3)对由可压碎圆柱形材料堆叠而成的试件进行了一维压缩试验，并对观察到的破坏机理进行了分类。结果表明，当压缩曲线出现屈服时，累积压溃数达到30%，压溃机理主要有两种：劈裂破坏和接触点处的压缩破坏。(4)对可压碎圆柱模型地基进行了刚性基础的二维长期承载试验。实验结果表明，滑移线的形成与圆柱的转动密切相关。

项目成果

Time dependent behavior of geomaterial due. to particle crushing

岩土材料随时间变化的行为。

• 发表时间: 1999
• 期刊: Proceedings of International workshop on soil crushability
• 作者: O. Kusakabe;M. Takei
• 通讯作者: M. Takei

武井正孝、米今智信、G.M.Mihai & 日下部治: "粒子破砕による地盤材料の時間依存挙動について" 東京工業大学土木工学科研究報告. 58. 37-56 (1998)

Masataka Takei、Tomonobu Yoneima、G.M.Mihai 和 Osamu Kusakabe：“关于颗粒破碎导致的地面材料的时间依赖性行为”，东京工业大学土木工程系研究报告 58. 37-56 (1998)。

Time dependent behavior of geomaterial due to particle crushing

由于颗粒破碎而导致的岩土材料随时间变化的行为

• 发表时间: 1999
• 期刊: Proceedings of International workshop on soil crushability
• 作者: Kusakabe;O;Takei;M
• 通讯作者: M

粒子破砕による地盤材料の時間依存挙動について

关于颗粒破碎引起的研磨材料随时间变化的行为

• 发表时间: 1998
• 期刊: 東京工業大学土木工学科研究報告 58
• 作者: 武井正孝;米今智信;Galer Mircea Mihai;日下部 治
• 通讯作者: 日下部 治

破砕性材料の一次元圧縮の時間依存性に関する研究

脆性材料一维压缩时间依赖性研究

• 发表时间: 1988
• 期刊: 土木学会年次学術講演会 54
• 作者: 日下部治;林豪人
• 通讯作者: 林豪人