Indexed by:期刊论文

First Author:Li, Wugang

Correspondence Author:Yang, Q (reprint author), Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116023, Peoples R China.

Co-author:Yang, Qing

Date of Publication:2018-02-01

Journal:INTERNATIONAL JOURNAL OF GEOMECHANICS

Included Journals:SCIE、EI、Scopus

Document Type:J

Volume:18

Issue:2

ISSN No.:1532-3641

Key Words:Overconsolidation; Unsaturated soils; Constitutive model; Degree of saturation; Suction

Abstract:Overconsolidated unsaturated soils emerge in many engineering problems. This article presents a constitutive model for unsaturated soils using skeleton stress and degree of saturation as fundamental variables. A subloading surface is introduced into the framework to interpret the effect of overconsolidation on the coupled hydromechanical behavior of overconsolidated unsaturated soils. The main advantage of the proposed model is that it is capable of reproducing the hydromechanical behavior of unsaturated soils with different initial overconsolidation ratios, such as the overconsolidation effect on the shearing-induced saturation change. The material parameters of the proposed model can be calibrated through conventional tests. Numerical studies were conducted to assess the performance of the model for a fictional silt under two typical scenarios. The validity of the proposed model was confirmed by experimental results for both isotropic and triaxial conditions reported in the literature.

Translation or Not:no