水利水电科技进展2012，Vol.32Issue(3)：28-31,4.DOI:10.3880/j.issn.1006-7647.2012.03.007
膨胀土湿胀干缩特性试验
Experimental study on swell-shrink performance of expansive soil
摘要
Abstract
The swell-shrink deformation of expansive soils results from the moisture change, and it is the main internal cause of crack propagation. In this study, the swelling deformation of remolded expansive soils under inundated conditions with different stages of the compression apparatus, and the shrinking deformation of remolded expansive soils with the shrink apparatus were tested without loads. Several relationships between the swell-shrink deformation and the moisture change were determined: the expansion coefficient and final expansion ratio have a positive correlation with initial dry density and a negative correlation with initial water content; the shrink coefficient and final linear and volume shrinkage ratio have a negative correlation with initial dry density and a positive correlation with initial water content; and the expansive coefficient and shrink coefficient reflect the deformation characteristics of expansive soils due to the moisture change and can be used as an index to judge the swell-shrink performance of expansive soils.关键词
膨胀土/胀缩变形/分级增湿/膨胀系数/收缩系数Key words
expansive soil/ swell-shrink deformation/ wetting in stages/ expansion coefficient/ shrink coefficient分类
建筑与水利引用本文复制引用
吴珺华,袁俊平,杨松,丁国权..膨胀土湿胀干缩特性试验[J].水利水电科技进展,2012,32(3):28-31,4.基金项目
国家自然科学基金(51008117) （51008117）
河海大学创新基金(2010B04214,B09020281) （2010B04214,B09020281）
江西省交通科学研究院委托项目(2011-11-056) （2011-11-056）
