长江科学院院报2017，Vol.34Issue(9)：127-131,136,6.DOI:10.11988/ckyyb.20160576
压实弱膨胀土变形干湿循环效应试验研究
Effect of Wetting-drying Cycles on Deformationof Weak Expansive Soil
边加敏1
作者信息
- 1. 南京交通职业技术学院 路桥与港航工程学院,南京 211188
- 折叠
摘要
Abstract
The effect of wet-dry cycles on the deformation characteristics of compacted weak expansive soil used in subgrade was investigated by simulating two working conditions (changes in loading and changes in moisture content).Results revealed that the swelling-shrinkage deformation of expansive soil was not completely reversible.The linear swelling ratio in the second wetting cycle was the largest, while the linear shrinkage ratio in the first shrinkage cycle was the largest.With the increasing of wetting-drying cycles, the swelling and shrinkage of specimens both reduced and stabilized gradually.The height of stabilized soil was different from that of the origin specimen.Moreover, changes in loading and moisture content both had great effect on the deformation characteristic of expansive soil.The results suggest that the influence of wet-dry cycle on the deformation of expansive soil used inside subgrade is smaller than that of working conditions on the subgrade.The position of filling expansive soil should be considered when determining the feasibility and treatment measures of subgrade.关键词
弱膨胀土/路堤填筑/上覆压力/干湿循环/胀缩变形Key words
weak expansive soil/subgrade filling/loading/wetting-drying cycle/deformation分类
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边加敏..压实弱膨胀土变形干湿循环效应试验研究[J].长江科学院院报,2017,34(9):127-131,136,6.
