重塑黏土临界状态线随初始含水率的变化规律

卞夏; 洪振舜; 蔡正银; 曾玲玲

重塑黏土临界状态线随初始含水率的变化规律 English Version

1. 东南大学交通学院岩土工程研究所，江苏南京 210096;
2. 南京水利科学研究院岩土工程研究所，江苏南京 210024;
3. 福州大学土木工程学院，福建福州 350108

基金项目: 国家自然科学基金资助项目（41172240，41102168）

详细信息

作者简介:
卞夏(1988- )，男，安徽宣城人，博士研究生，主要从事软黏土的基本性质以及本构模型方向研究。E-mail: bianxia2000@163.com。

中图分类号: TU411
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出版历程
- 收稿日期: 2012-03-05
- 发布日期: 2013-01-31

Change of critical state lines of reconstituted clays with initial water contents

1. Institute of Geotechnical Engineering, Transportation College, Southeast University, Nanjing 210096, China;
2. Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
3. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 针对具有不同初始含水率的两种饱和重塑黏土进行了一系列的三轴固结不排水剪切试验，探讨初始含水率对黏土临界状态的影响，得到了不同初始含水率重塑土的应力-应变关系和有效应力路径。根据应力-应变关系曲线发现不同初始含水率重塑土均存在临界状态应力比。基于临界状态土力学理论研究了在p´-q平面和v-lnp´平面内临界状态线随初始含水率的变化规律，并分析了初始含水率对临界状态参数的影响。
- 重塑土 /
- 初始含水率 /
- 三轴试验 /
- 临界状态线 /
- 临界状态参数
Abstract: A series of isotropically consolidated undrained triaxial compression shear tests are performed on two kinds of reconstituted clays with different initial water contents to investigate the effect of the initial water content on the critical states. It is found that the stress-strain curves and the effective stress paths of the reconstituted clays are significantly affected by the initial water content. There exists the critical stress ratio for a given clay at the given initial water content which is not dependent on the confining stress. More importantly, within the theoretical critical state framework, the critical state line is not unique for the given reconstituted clay with an intrinsic nature. The change of the critical state lines with initial water content is discussed in p´-q plane and v-ln p´ plane, respectively. The variation of the critical state parameters with the initial water content is analyzed.
- reconstituted clay /
- initial water content /
- triaxial test /
- critical state line /
- critical state parameter

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参考文献(13)

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