The state-dependent dilatancy properties of rockfills considering the influence of gradation

DOI

10.2991/iccet-15.2015.267How to use a DOI?

Keywords

rockfills; dilatancy; gradation; density; confining pressure.

Abstract

The stress dilatancy theory has been succeeded in demonstrating the deformation properties of clay. However, the deformation behaviors of rockfills are related to the stress and its initial state, so the stress dilatancy theory cannot apply to the rockfills directly. We take the state-dependent dilatancy theory of sand as a reference, design a series of large-scale triaxial shear tests on rockfill specimens with different gradations and densities under different confining pressures, and study the shear deformation characteristics of rockfills. According to the test results, the mathematical expression of the volume strain and deviatoric strain is established, which can reflect the contractive and expansive deformation behaviors. Then, ignoring the elastic deformation of rockfills and differentiating the mathematical equation of volume strain and deviatoric strain, the relationship of dilatancy rate and deviatoric strain can be obtained approximately. Finally, we analyze the influence of gradation, density and confining pressure on the dilatancy rate, and propose the general expression of the state-dependent dilatancy of rockfills.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiao-Mei Li
AU  - Lin Han
AU  - Yun-Fei Guan
PY  - 2015/11
DA  - 2015/11
TI  - The state-dependent dilatancy properties of rockfills considering the influence of gradation
BT  - Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015
PB  - Atlantis Press
SP  - 1433
EP  - 1438
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccet-15.2015.267
DO  - 10.2991/iccet-15.2015.267
ID  - Li2015/11
ER  -