Experimental study of anisotropy and non-coaxiality behavior of natural clay by using drained shear test

被引：0
|
作者：
Chen J. [1 ]
Guo L. [2 ]
Cai Y. [1 ,2 ]
Chen J. [1 ]
机构：
[1] Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, Zhejiang
[2] College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, 325035, Zhejiang
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2016年 / 35卷
基金：
中国国家自然科学基金;
关键词：
Anisotropy; Direction of principal stress; Intermediate principal stress coefficient; Non-coaxiality; Soft clay; Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2015.0090
中图分类号：
学科分类号：
摘要：
Recent studies on anisotropy of soft clay are mostly carried out under undrained condition. There is a lack of anisotropy study of soft clay under drained condition. By using hollow cylinder apparatus(HCA), a series of drained shear tests were carried out, under different direction of principal stress and different intermediate principal stress coefficient. The results show that the isotropic consolidated soft clay has different stress-strain behaviors with different directions of principal stress. Compared to undrained condition, strain development is more gentle under drained condition and the inflection point of rapid strain development is not that obvious. Intermediate principal stress coefficient has a significant effect on strain development, especially when it lies in the range of [0.5, 1.0]. The non-coaxiality of soft clay turns out to highly depend on the direction of principal stress. The non-coaxiality is not remarkable when the direction of principal stress is around 0° or 90°, and 45° is a inflection point for the non-coaxiality of soft clay. The conclusions made by this paper can help us have a better understanding of the anisotropy of soft clay under drained condition, also provide a foundation for establishing constitutive relations and guiding engineering design. © 2016, Science Press. All right reserved.
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页码：3291 / 3298
页数：7
相关论文
共 16 条
  • [1] Wang R., Liu J., Monitoring and study on longitudinal deformation in long-term operation of Shanghai metro, Underground Engineering and Tunnels, 4, pp. 6-11, (2001)
  • [2] Gutierrez M., Ishihara K., Non-coaxiality and energy dissipation in granular materials, Soils and Foundations, 40, 2, pp. 49-59, (2000)
  • [3] Cai Y.Y., An experimental study of non-coaxial soil behavior using hollow cylinder testing, (2010)
  • [4] Yan J., Zhou J., Liu Z., Et al., Elasto-plastic deformation behavior of intact clay subjected to principal stress rotation, Chinese Journal of Rock Mechanics and Engineering, 33, pp. 4350-4358, (2014)
  • [5] Tong Z., Zhang J., Zhang G., An elastoplastic constitutive model of sands considering cyclic rotation of principal stress axes, Chinese Journal of Rock Mechanics and Engineering, 28, 9, pp. 1918-1927, (2009)
  • [6] Symes M.J., Gens A., Hight D.W., Drained principal stress rotation in saturated sand, Géotechnique, 38, 4, pp. 59-81, (1988)
  • [7] Symes M.J., Gens A., Hight D.W., Undrained anisotropy and principal stress rotation in saturated sand, Géotechnique, 34, 1, pp. 11-27, (1984)
  • [8] Gutierrez M., Ishihara K., Towhata I., Flow theory for sand during rotation of principal stress direction, Soils and Foundations, 31, 4, pp. 121-132, (1991)
  • [9] Lade P.V., Kirkgard M.M., Effect of stress rotation and changes of b-values on cross-anisotropic behavior of natural, K<sub>0</sub>-consolidated soft clay, Soils and Foundations, 40, 6, pp. 93-105, (2000)
  • [10] Shen Y., Experimental study on effect of variation of principal stress orientation on undisturbed soft clay, (2007)
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