西南交通大学学报Issue(3)：393-398,431,7.DOI:10.3969/j.issn.0258-2724.2014.03.004
非饱和红黏土土水特性及强度特征研究
Soil-Water and Shear Strength Characteristics of Unsaturated Red Clay
摘要
Abstract
In order to study the unsaturated characteristics of red clay,Geo-experts self-balanced pressure plate meter and ZJ direct shear apparatus were used in experiments to investigate the soil-water and shear strength characteristics of the typical undisturbed and remolded red clays under different dry densities. Based on the experimental results,the physical and mechanical features of unsaturated red clay were discussed. The results show that mineral composition and micro-structural changes may be the major factors accounting for the difference between physical and mechanical properties of the undisturbed and remolded red clay. The soil-water characteristics curve of undisturbed unsaturated red clay show three stages,which has the obvious air-entry values and residual moisture content,while the soil-water characteristics curve of remodeled unsaturated clay presents a semi-parabolic variation. For the undisturbed red clay,the maximum cohesion occurs in a low moisture condition,and the corresponding moisture content is about 5% to 10% larger than the residual moisture content. Thus,in this case,increasing the number of test groups can optimize the test results. For the remolded red clay,the range of the significantly reduced internal friction angle can be determined according to the plastic limit.关键词
非饱和红黏土/土水特性/强度特征Key words
unsaturated red clay/soil-water characteristics/shear strength characteristics分类
建筑与水利引用本文复制引用
李龙起,罗书学,姜红,宋磊,丁冰冰,李楚根..非饱和红黏土土水特性及强度特征研究[J].西南交通大学学报,2014,(3):393-398,431,7.基金项目
铁道部科技研究开发计划重大项目 （）
