Volume change behavior of unsaturated soils under non-isothermal conditions

被引：30

作者：

Cai GuoQing ^{[1
]}

Zhao ChengGang ^{[1
]}

Liu Yan ^{[1
]}

Li Jian ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Civil Engn & Architecture, Dept Geotech & Geoenvironm Engn, Beijing 100044, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2011年 / 56卷 / 23期

基金：

中国国家自然科学基金;

关键词：

unsaturated soils; temperature influence; deformation properties; constitutive model; POROUS-MEDIA MODELS; CONSTITUTIVE MODEL; SATURATED CLAYS; THERMOPLASTICITY; FRAMEWORK; PRINCIPLE; EQUATIONS; MIXTURES; STRESS; WORK;

D O I：

10.1007/s11434-011-4580-2

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

With the development of modern geotechnical engineering practices such as the construction of high level radioactive waste repositories, exploitation and utilization of geothermal resources, energy-saving buildings and underground storage of CO(2), research into the influence of temperature on the basic mechanical properties of unsaturated soils has become an important issue internationally. By using the work expression and considering the influence of temperature on the basic properties of unsaturated soils, the average soil skeleton stress, modified suction and temperature were selected as state variables of generalized forces in thermodynamics and the soil skeleton strain, saturation and entropy were chosen as state variables of generalized flows conjugate to the variables of generalized forces. Based on the nonlinear multi-field coupled model and by using existing experimental results, an elastic-plastic constitutive model of unsaturated soils under non-isothermal conditions was developed to analyze the influence of temperature on the deformation properties of unsaturated soils. The model was used to predict and analyze the influence of suction and temperature on the deformation properties of unsaturated soils under isotropic conditions, and was successfully verified using experimental results.

引用

页码：2495 / 2504

页数：10

共 30 条

[1] Volume change behaviour of saturated clays under drained heating conditions: experimental results and constitutive modeling [J].