Abstract
Generally speaking, in many cases geomaterials are in unsaturated state. The mechanical properties of unsaturated soil are much more complicated than those of saturated soil. To rationally describe the mechanical properties of unsaturated soil, it is important to find out suitable state variables, such as degree of saturation and skeleton stress that determine the mechanical properties of unsaturated soil. In the existing researches of unsaturated soil, however, element tests under constant-degree-of-saturation condition is not sufficient in relating to the search of constitutive model. In this paper, degree of saturation and the skeleton stress are regarded as the state variables. Oedometer tests and triaxial compression tests under constant-degree-of-saturation condition were conducted to study the mechanical properties of unsaturated Masado (Decomposed granite) at different degrees of saturation. It is found that the degree of saturation and the skeleton stress can be reasonably used as the state variables to describe the mechanical properties of unsaturated soil in proper constitutive model.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Alonso, E.E., Gens, A., Josa, A.: Constitutive model for partially saturated soils. Géotechnique 40(3), 405–430 (1990)
Burton, G.J., Pineda, J.A., Sheng, D., Airey, D.W., Zhang, F.: Exploring one-dimensional compression of compacted clay under constant degree of saturation paths. Géotechnique 66(5), 435–440 (2016)
Cui, Y.J., Delage, P.: Yielding and plastic behaviour of an unsaturated compacted silt. Géotechnique 46(2), 291–311 (1996)
Chiu, C.F., Ng, C.W.: A state-dependent elasto-plastic model for saturated and unsaturated soils. Géotechnique 53(9), 809–830 (2003)
Kohgo, Y., Nakano, M., Miyazaki, T.: Theoretical aspects of constitutive modelling for unsaturated soils. Soils Found. 33(4), 49–63 (1993)
Loret, B., Khalili, N.: An effective stress elastic–plastic model for unsaturated porous media. Mech. Mater. 34(2), 97–116 (2002)
Zhang, F., Ikariya, T.: A new model for unsaturated soil using skeleton stress and degree of saturation as state variables. Soils Found. 51(1), 67–81 (2011)
Zhou, A.N., Sheng, D., Sloan, S.W., Gens, A.: Interpretation of unsaturated soil behaviour in the stress-saturation space, I: Volume change and water retention behaviours. Comput. Geotech. 43, 178–187 (2012)
Zhou, A.N., Sheng, D.: An advanced hydro-mechanical constitutive model for unsaturated soils with different initial densities. Comput. Geotech. 63, 46–66 (2015)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Qiu, X.Y., Xiong, X., Tsunemoto, T., Okino, S., Zhang, F. (2018). Mechanical Behavior of Unsaturated Masado Under Constant-Degree-of-Saturation Condition. In: Hu, L., Gu, X., Tao, J., Zhou, A. (eds) Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0095-0_3
Download citation
DOI: https://doi.org/10.1007/978-981-13-0095-0_3
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-0094-3
Online ISBN: 978-981-13-0095-0
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)