中南大学学报（自然科学版）Issue(1)：143-148,6.DOI:10.11817/j.issn.1672-7207.2016.01.021
基于干湿变形效应的压实红黏土土水特征
Water retention properties of deformable compacted red clay induced by wetting and drying
摘要
Abstract
Two specimens with dry densities of 1.3 g/cm3 and 1.5 g/cm3 were compacted by the red clay powder with a water content of 4%. Then, the specimens were saturated in the confined conditions and the deformations were measured during the saturating. The saturated specimens were dried by increasing suction through the vapor phase technique, the void ratio and saturation degree were also measured during the drying, and consequently the soil water retention curves (SWRCs) were obtained. The results show that the swelling strain of compacted red clay increases with the increase of the saturation. What’s more, the larger the initial dry density, the greater the swelling strain. During the drying, the void ratio of the specimen decreases with the increase of the suction. For a given suction, the specimen with a smaller dry density has a bigger void ratio and a higher saturation degree. According to the SWRCs, modified model was proposed to account for the effect of deformation on SWRCs, and the experimental data could be fitted well.关键词
压实红黏土/湿化/干燥/变形/土水特征曲线Key words
compacted red clay/wetting/drying/deformation/soil water retention curve分类
建筑与水利引用本文复制引用
贺勇,黄润秋,陈永贵,叶为民..基于干湿变形效应的压实红黏土土水特征[J].中南大学学报（自然科学版）,2016,(1):143-148,6.基金项目
国家自然科学基金资助项目(41272287，41422207)；地质灾害防治与地质环境保护国家重点实验室开放课题(成都理工大学)(SKLGP2013K004)；湖南省教育厅科学研究项目(15A009)(Projects(41272287,41422207) supported by the National Natural Science Foundation of China （41272287，41422207）
Project(SKLGP2013K004) supported by the Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) （SKLGP2013K004）
Project(15A009) supported by Scientific Research Fund of Hunan Provincial Education Department) （15A009）
