Constitutive Characterization of Strength and Deformation for Natural Clay and Cemented Sand

Gao, Z. and zhao, j. (2011) Constitutive Characterization of Strength and Deformation for Natural Clay and Cemented Sand. In: 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, Hong Kong, 23-27 May 2011,

Abstract

Due to the influence of bonding and soil fabric, the behavior of a natural soil differs significantly from that of a remolded soil. It has been found that a soil with bonding may exhibit enhanced soil strength, stiffness as well as brittleness, and the soil fabric may lead to anisotropic soil behavior. A general failure criterion and constitutive framework considering both aspects of natural soils is of significant importance for practical analysis and design of geo-structures. In this paper, we first employ an anisotropic failure criterion to characterize the peak strength of cemented sands and natural clays. By replacing the constant frictional parameter with a hardening parameter, the anisotropic failure criterion is then modified to be a yield function, based on which a constitutive model is proposed to describe the effect of bonding and fabric anisotropy on the behavior of naturally bonded soil. Simulations of the behavior of cemented sands by the model agree favorably with test results.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Gao, Dr Zhiwei
• Authors: Gao, Z., and zhao, j.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment

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