| 南宁非饱和膨胀土剪切蠕变特性试验研究 |
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| 引用本文： | 范志强,肖宏彬.南宁非饱和膨胀土剪切蠕变特性试验研究[J].工业建筑,2009,39(11). |
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| 作者姓名： | 范志强 肖宏彬 |
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| 作者单位： | 1. 中国建筑第五工程局有限公司,长沙,410004
2. 湖南工业大学岩土工程研究所,湖南株洲,412008;中南林业科技大学,长沙,410004 |
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| 基金项目： | 国家自然科学基金，湖南省自然科学基金，湖南省科技厅资助项目 |
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| 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.
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| 关 键 词： | 非饱和 膨胀土 剪切 非线性 Bu体模型 |
EXPERIMENTAL STUDY ON SHEAR CREEP CHARACTERISTICS OF NANNING UNSATURATED EXPANSIVE SOILS |
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| Fan Zhiqiang,Xiao Hongbin.EXPERIMENTAL STUDY ON SHEAR CREEP CHARACTERISTICS OF NANNING UNSATURATED EXPANSIVE SOILS[J].Industrial Construction,2009,39(11). |
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| Authors: | Fan Zhiqiang Xiao Hongbin |
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| Abstract: | On the basis of a series of indoor tests for unsaturated Nanning expansive soils through creep testing apparatus controlled by sheafing 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 theological 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. |
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| Keywords: | unsaturated expansive soil shear nonlinear Bu model |
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