无黏性土剪胀性的细观认识

雷国辉; 陈晶晶

无黏性土剪胀性的细观认识 English Version

雷国辉¹,
陈晶晶^1,2

1. 河海大学岩土力学与堤坝工程教育部重点实验室，岩土工程科学研究所，江苏南京 210098 ； 2. 铁道第三勘察设计院集团有限公司地质路基设计处，天津 300251

基金项目: 中央高校基本科研业务费专项资金项目（ 2011B02814 ）

详细信息

作者简介:
雷国辉 (1972 – ) ，男，江西丰城人，教授，从事土力学及地基基础工程研究。

中图分类号: TU431
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出版历程
- 发布日期: 2011-09-14

Microscopic understanding of dilatancy in cohesionless soils

LEI Guo-hui¹,
CHEN Jing-jing^1,2

(1. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 2. Geology and Subgrade Design Department of Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China)

摘要

摘要: 针对规则的椭圆形颗粒、圆形和履带形颗粒以及不规则形状颗粒组成的土体进行了平面力学分析，推导了应力比和塑性应变增量比表达式，建立了由土体本身内在材料属性，包括颗粒的形状、大小或级配、以及布局方式或组构，所决定的细观剪胀模型。分析结果表明，在建立状态相关的宏观剪胀理论时，状态的概念并不仅仅局限于描述土体颗粒布局方式的孔隙比状态参数，还应包括其它能够反映颗粒形状、大小或级配的宏观状态参数。
- 关键词剪胀 /
- 颗粒 /
- 布局 /
- 应力比 /
- 塑性应变增量比
Abstract: Expressions for stress ratios and plastic strain increment ratios are derived from the planar me chanical analyses of soils consisting of particles of regular elliptical shape, circular and crawler belt shapes, and of irregular shapes. On this basis, a microscopic dilatancy model is established depending on the intrinsic characteristics of soil materials including particle shape, particle size or gradation, and particle packing or fabric. It is shown from the model analyses that when establishing the macroscopic state-dependent dilatancy theory, the concept of the state should not be limited to only the void ratio state parameter describing the soil particle packing. Other macroscopic state parameters capable of reflecting the particle shape, size and gradation should be also included.
- dilatancy /
- particle /
- packing /
- stress ratio /
- plastic strain increment ratio

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参考文献(23)

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