A constitutive model of unsaturated soils with high saturation

被引：0

作者：

Liu Yan ^{[1
,2
]}

Wei Chang-fu ^{[1
]}

Zhao Cheng-gang ^{[2
]}

Fang Qian ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China

[2] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2013年 / 34卷 / 08期

关键词：

high saturation; occluded gas; constitutive model; unsaturated soils; principle of generalized effective stress;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

In unsaturated soils with high saturation, gas phase is disconnected, and the occluded gas pressure may change and affect the soil behavior. The properties of unsaturated soils with high saturation are first discussed; and then a constitutive model is developed within an existing constitutive framework of unsaturated soils by using the principle of generalized effective stress. This model takes into account the effect of gas diffusion, with a hardening law accounting for the effect of occluded gas pressure change. To validate the new model, the modeling results are compared with the experimental results available in the literature and the simulated results of existing models. It is shown that this model performs better than existing models, especially for the unsaturated soils at high saturation.

引用

页码：2189 / 2194

页数：6