土体<em>K</em><sub>0</sub>加卸载过程中水平应力变化研究

罗耀武; 凌道盛; 陈云敏; 胡琦

doi:10.13204/j.gyjz201007015

土体K₀加卸载过程中水平应力变化研究

doi: 10.13204/j.gyjz201007015

1.
浙江大学软弱土与环境土工教育部重点实验室,杭州 310058

基金项目:

中国博士后科学基金项目(20080441232)

详细信息

作者简介:
罗耀武，男，1982年出生，博士。E－mail:luoyaowu@163.com

中图分类号: TU431
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- 被引次数: 0
出版历程
- 收稿日期: 2009-11-15
- 刊出日期: 2010-07-20

THE CHANGE IN HORIZONTAL STRESS OF SOILS DURING K₀ LOADING-UNLOADING

1.
Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education (Zhejiang University),Hangzhou 310058,China

摘要

摘要: 采用JCY型K0固结仪，对不同密实度的砂土、饱和粉土和饱和粉质黏土进行K0加卸载试验，采用K0加卸载模型对土体加卸载过程中的水平应力h和竖向应力v的关系进行描述，结合土体物理力学特性对K0加卸载模型参数进行探讨。试验结果表明：对于黏性土和非黏性土，土体加载过程中v-h关系为线性，卸载过程中v-h关系为非线性；土体竖向应力v卸荷至零时，土体中的残余水平应力h与土体黏性相关，采用土体的K0加卸载模型可对土体K0加卸载过程中的v-h关系进行良好的描述；土体的K0加卸载模型参数K0(NC)和与其内摩擦角相关。
- K0加卸载 /
- 水平应力 /
- 静止土压力系数
Abstract: The K0 loading-unloading tests for sand, saturated silt and silty clay were conducted, using the JCY consolidation apparatus, then the v-h relationships during the tests were described by K0 loading-unloading model.The parameters of K0 loading-unloading model were discussed. Several results were concluded. The v-h relationship is linear during loading, and it is unlinear during unloading. When the vertical stress v equals to zero during unloading, the residual horizontal stress is affected by the viscosity of the soil. The v-h relationship during K0 loading-unloading can be calculated by K0 loading-unloading model. The parameters K0(NC) and are affected by the friction angle .
- K0 loading-unloading /
- horizontal stress /
- coefficient of earth pressure at rest

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参考文献(9)

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