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非饱和含黏砂土的弹塑性剪胀特性研究

朱青青, 苗强强, 陈正汉, 姚志华, 章峻豪

朱青青, 苗强强, 陈正汉, 姚志华, 章峻豪. 非饱和含黏砂土的弹塑性剪胀特性研究[J]. 岩土工程学报, 2018, 40(S1): 65-72. DOI: 10.11779/CJGE2018S1011
引用本文: 朱青青, 苗强强, 陈正汉, 姚志华, 章峻豪. 非饱和含黏砂土的弹塑性剪胀特性研究[J]. 岩土工程学报, 2018, 40(S1): 65-72. DOI: 10.11779/CJGE2018S1011
ZHU Qing-qing, MIAO Qiang-qiang, CHEN Zheng-han, YAO Zhi-hua, ZHANG Jun-hao. Elastoplastic dilatancy relations of unsaturated clayey sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 65-72. DOI: 10.11779/CJGE2018S1011
Citation: ZHU Qing-qing, MIAO Qiang-qiang, CHEN Zheng-han, YAO Zhi-hua, ZHANG Jun-hao. Elastoplastic dilatancy relations of unsaturated clayey sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 65-72. DOI: 10.11779/CJGE2018S1011

非饱和含黏砂土的弹塑性剪胀特性研究  English Version

基金项目: 国家自然科学基金项目(51509257)
详细信息
    作者简介:

    朱青青(1979- ),女,副教授,主要从事环境岩土工程方面的科研与教学工作。E-mail: 952977585@qq.com。

  • 中图分类号: TU443

Elastoplastic dilatancy relations of unsaturated clayey sand

  • 摘要: 通过引入能够较好反映非饱和土弹塑性变形特性的Barcelona模型并结合能够较好反映砂土剪胀特性的Lade模型,进行了3种不同应力路径的三轴试验,给出了能反映非饱和含黏砂土应力应变特性的非饱和弹塑性模型,并讨论了吸力和净围压对弹性应变、塑性应变、塑性功和屈服函数的影响。推导出了总体积变形的表达式,该式同试验结果变化规律符合较好,说明该理论适合于非饱和含黏砂土。同时,由试验数据可以得出含黏砂土的体变峰值点、剪胀特性同净围压和吸力的变化有密切的关系。
    Abstract: The modified Lade model and Barcelona unsaturated elastoplastic model are used to describe the stress and strain relationship of unsaturated clayey sand, The tests on three types of stress paths tests are conducted. The elastoplastic constitutive relations are deduced considering suction and net confining pressure at the same time. The changing laws of elastic strain, plastic strain, plastic work and yield function are given by adjusting the suction and net confining pressure. A formula for volume change that can express the stress dilatancy of unsaturated clayey sand is developed. The results of this formula agree with the test ones. It is shown that this theory is suitable for unsaturated clayey sand. At the same time, the peak value points and the stress dilatancy are greatly related to the net confining pressure and the matric suction.
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出版历程
  • 收稿日期:  2017-05-14
  • 发布日期:  2018-08-24

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