Stress path triaxial tests on K0-consolidated saturated soft clay

被引：3

作者：

Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou ^{[1
]}

310027, China

不详 ^{[2
]}

325035, China

机构：

[1] Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou

[2] College of Civil Engineering and Architecture, Wenzhou University, Wenzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban) | / 5卷 / 1820-1825期

基金：

中国国家自然科学基金;

关键词：

Foundation pit excavation; K[!sub]0[!/sub] consolidation; Pore water pressure; Stress path;

D O I：

10.11817/j.issn.1672-7207.2015.05.033

中图分类号：

学科分类号：

摘要：

Five types of stress path triaxial tests were conducted on K0-consolidated Wenzhou saturated soft clay under undrained conditions by GDS triaxial apparatus. The stress-strain relationship, pore water pressure evolution and effective stress path under different stress paths were discussed. Using Skempton theory, a unified formula between pore pressure and axial strain was established through modifying the hyperbolic relationship under constant confining pressure. The results show that the stress-strain relationship and pore water pressure evolution of K0 consolidated soft clay are very different under different stress paths. Because the variation of confining pressure is offset by the generation of pore water pressure, the effective stress paths under different stress paths almost coincide, which validates the uniqueness of relationship of p-q-e. ©, 2015, Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology). All right reserved.

引用

页码：1820 / 1825

页数：5

共 19 条

[1] Sultan N., Cui Y.J., Delage P., Yielding and plastic behaviour of Boom clay, Geotechnique, 60, 9, pp. 657-666, (2010)
[2] Lade P.V., Duncan J.M., Stress-path dependent behavior of cohesionless soil, Journal of the Geotechnical Engineering Division, ASCE, 102, 1, pp. 42-48, (1976)
[3] Nagaraj T.S.M.K., Sridharan A., Incremental loading device for stress path and strength testing of soils, Geotechnical Testing Journal, 4, 2, pp. 35-46, (1981)
[4] Cheng S.R.L., Lee I.K., Response of granular soil along constant stress increment ratio path, Journal of Geotechnical Engineering, ASCE, 116, 3, pp. 355-376, (1990)
[5] Yang G., Sun X., Yu Y., Et al., Experimental study of mechanical behavior of a coarse-grained material under various stress paths, Rock and Soil Mechanics, 31, 4, pp. 1118-1122, (2010)
[6] Ying H., Li J., Xie X., Et al., Research on stress path during excavation considering rotation of principal stress axis, Rock and Soil Mechanics, 33, 4, pp. 1013-1017, (2012)
[7] Chi M., Li X., Zhao C., Et al., Meso-scale study of effects of stress path on deformation behaviors of sand, Rock and Soil Mechanics, 31, 10, pp. 3081-3087, (2010)
[8] Callisto L., Calabresi G., Mechanical behavior of a natural soft clay, Geotechnique, 48, 4, pp. 495-513, (1998)
[9] Malanraki V., Toll D.G., Triaxial tests on weakly bonded soil with changes in stress path, Journal of Geotechnical and Geoenvironmental Engineering, 127, 3, pp. 282-291, (2001)
[10] Yang X., Zhu Z., Han G., Deformation and failure characteristics of soil mass under different stress paths, Rock and Soil Mechanics, 27, 12, pp. 2181-2185, (2006)

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