摘要
总结有关土-水特征曲线的研究成果,利用非饱和土固结仪进行非饱和重塑粘土试样的土-水特征曲线试验,分析了竖向压力和固结压力对土-水特征曲线的影响,并利用Fredlund 3参数模型对试验数据进行拟合。研究结果表明,竖向压力越高,土-水特征曲线越平缓,空气进入值越大,同吸力下的土体饱和度越大。固结压力的影响与竖向压力相似。
The soil-water characteristic curve is an important concept of unsaturated soil mechanics.Based on the published data,the influence of compaction stress and consolidation pressure on soil-water characteristic curve is studied,the soil-water characteristic curve tests for remolded unsaturated clay specimens are carried out by means of the unsaturated consolidation apparatus,and the test data are fitted by using the Fredlund tri-parameter model.The study results show that the higher the compaction stress,the flatter is the soil-water characteristic curve,and the higher is the air entry value.Simultaneously,the effect of consolidation pressure is similar to that of compaction stress.
出处
《水利与建筑工程学报》
2012年第6期147-150,共4页
Journal of Water Resources and Architectural Engineering
关键词
非饱和土
基质吸力
土-水特征曲线
竖向压力
unsaturated soil
metric suction
soil-water characteristic curve
compaction stress
