桂林理工大学学报2017，Vol.37Issue(3)：437-443,7.DOI:10.3969/j.issn.1674-9057.2017.03.007
宁明膨胀土持水性研究
Water-retention behaviour of Ningming expansive soil
摘要
Abstract
The soil water-holding capacity can be described by soil water characteristic curve (SWCC),showing the relationship between the suction and the soil water content or the saturation,important in unsaturated soil mechanics.The pressure plate method and vapor equilibrium technique are used to investigate the water retention from Ningming,of Guangxi.The effects of different initial dry density 1.25 and 1.5 g/cm3 on soil water water retention are compared.Under the same dry density,different sampling methods on the water retention of soil are compared.The test results show that the air entry values of compacted specimens with initial dry density are 1.25 and 1.5 g/cm3,about 10 and 70 kPa,and the air entry value of pre-consolidatedated specimen with initial dry density 1.25 g/cm3 is 30 kPa.The water content or saturation decreases with the increase of suction.Under the same suction condition,the water retention of the pre-consolidated sample is better.关键词
非饱和土/宁明膨胀土/土-水特征曲线/预固结/进气值Key words
unsaturated soil/Ningming expansive soil/soil water characteristic curve/pre-consolidatedated specimen分类
建筑与水利引用本文复制引用
于明波,颜荣涛,韦昌富,牛庚,何锦堂,张芹..宁明膨胀土持水性研究[J].桂林理工大学学报,2017,37(3):437-443,7.基金项目
国家自然科学基金项目(11372078 （）
51309055 （）
11562007) （）
广西自然科学基金项目(2012GXNSFBA053138) （2012GXNSFBA053138）
广西研究生教育创新计划资助项目(YCSZ2015159) （YCSZ2015159）
