南宁非饱和膨胀土剪切蠕变特性试验研究

范志强; 肖宏彬

doi:10.13204/j.gyjz200911017

南宁非饱和膨胀土剪切蠕变特性试验研究

doi: 10.13204/j.gyjz200911017

范志强¹,
肖宏彬^2,3

1.
1. 中国建筑第五工程局有限公司,长沙 410004;
2.
2. 湖南工业大学岩土工程研究所,株洲 412008;
3.
3. 中南林业科技大学,长沙 410004

基金项目:

国家自然科学基金资助项目(50978097);湖南省自然科学基金资助项目(08JJ3092);湖南省科技厅基金资助项目(2007FJ3077)

详细信息

作者简介:
范志强，男，1976年10月出生，工程师，硕士研究生。E-mail:jsfzq@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2009-03-14
- 刊出日期: 2009-11-20

EXPERIMENTAL STUDY ON SHEAR CREEP CHARACTERISTICS OF NANNING UNSATURATED EXPANSIVE SOILS

Fan Zhiqiang¹,
Xiao Hongbin^2,3

1.
1. China Construction Fifth Engineering Division Corp. ,Ltd. ,Changsha 410004,China;
2.
2. Institute of Geotechnical Engineering,Hunan University of Technology,Zhuzhou 412008,China;
3.
3. Central South University of Forestry and Technology,Changsha 410004,China

摘要

摘要: 通过改装的剪应力控制式直剪仪对南宁非饱和膨胀土进行系列室内试验研究,探讨非饱和膨胀土的非线性流变特性。试验结果表明:当剪应力小于或等于25.5 kPa时,土体表现为衰减蠕变,当剪应力高于25.5 kPa时,土体具有明显的非线性流变特性。同时,通过对剪切蠕变曲线的拟合发现,南宁非饱和膨胀土的流变可以用Bu体模型来描述,并能得出其相应的本构方程和蠕变方程。
- 非饱和 /
- 膨胀土 /
- 剪切 /
- 非线性 /
- Bu体模型
Abstract: On the basis of a series of indoor tests for unsaturated Nanning expansive soils through creep testing apparatus controlled by shearing force,nonliner rheological characteristics of the expansive soils were researched.The results show that the soil performs for attenuation when shear stress is less than or equal to 25.5 kPa,but the soil has obvious non linear rheological behavior when shear stress is higher than 25.5 kPa.Through the experiment creep curve can be described by Burgers model,the constitutive equation and the creep equation of the expansive soils also be obtained.
- unsaturated /
- expansive soil /
- shear /
- nonlinear /
- Bu model

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参考文献(11)

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