岩土力学2017，Vol.38Issue(1)：165-173,9.DOI:10.16285/j.rsm.2017.01.021
非饱和土干化过程微观结构演化规律研究
Microstructure evolution of unsaturated soil during drying process
摘要
Abstract
The hydro-mechanical coupling is the basic characteristics to the unsaturated soil,especially to the one which consists of clay particles.Pore structure of clay is sensitive to the water content;and the pore size distribution (PSD) changes at every moment during drying process.The evolution laws of microstructure under the hydraulic path are first summarized based on experimental results.Subsequently,a novel model is developed by relating the pore-size distribution to the void ratio.According to the model,the PSD can be transformed from the initial PSD through three steps:translation,scaling and dispersion.The quantity of displacement and scaling are linear with void ratio;and the dispersion is exponential attenuation with void ratio.Finally,the model predictions are compared with experimental measurements in the literature,showing that the new model is capable of describing the microstructure evolution of unsaturated soil during drying process.关键词
孔隙分布曲线/干化过程/微观结构/压汞试验/非饱和土Key words
pore size distribution/drying process/microstructure/mercury intrusion/unsaturated soil分类
建筑与水利引用本文复制引用
黄启迪,蔡国庆,赵成刚..非饱和土干化过程微观结构演化规律研究[J].岩土力学,2017,38(1):165-173,9.基金项目
国家重点基础研究发展计划(973)项目(No.2015CB057800) （973）
国家自然科学基金项目(No.51678041,No.51278047,No.51608033) （No.51678041,No.51278047,No.51608033）
北京市自然科学基金项目(No.8162032) （No.8162032）
广西岩土力学与工程重点实验室资助课题(No.14-KF-05).This work was supported by the National Basic Research Program of China (973 Program) (2015CB057800),the National Natural Science Foundation of China (51678041,51278047,51608033),Beijing Municipal Natural Science Fundamental (8162032),and Guangxi Key Laboratory of Geotechnics and Geotechnical Engineering (14-KF-05). （No.14-KF-05）
