江苏大学学报（自然科学版）2016，Vol.37Issue(6)：713-718,6.DOI:10.3969/j.issn.1671-7775.2016.06.016
不同荷载作用下膨胀土的膨胀率与膨胀潜势试验
Expansive ratio and expansive potentiality of expansive soil under different loadings
摘要
Abstract
Based on the expansive ratio experiments of expansive soil under different loading conditions, the quantitative computing method of expansive potentiality was obtained for the expansive soil of tunnels in Baise in Guangxi province.The effects of time and compression force under different loadings on expansive ratio and expansive potentiality were investigated.The results indicate that the expansive potentiality is increased with the increasing of compression force,while the expansive ratio is decreased. The relationship between expansive ratio and pressure can be well represented by power function. Compared to low pressure,the expansive ratio and expansive potentiality are more sensitive to pressure change at high pressure.The variation trends of expansive ratio and expansive potentiality are basically the same with the increasing of pressure.After immersed for two hours,the growth rate of expansive ratio decreases with the increasing of pressure,and the variation trend remains stable in the following four hours.At the beginning of tests,the expansive potentialities of the same expansive soil are the same,and their differences are gradually increased with the increasing of time changes of soil particle distribution and moisture diffusion path by pressure force.The swelling characteristics of expansive soil can be well represented by expansive potentiality during the expansion process,and the trend of expansive potentiality with the variating of time and stress has the same significance with that of expansion rate.关键词
膨胀土/荷载/膨胀特性/膨胀率/膨胀潜势Key words
expansive soil/loading/swelling characteristics/expansive ratio/expansive potentiality分类
建筑与水利引用本文复制引用
武科,吴昊天,张文,王亚君..不同荷载作用下膨胀土的膨胀率与膨胀潜势试验[J].江苏大学学报（自然科学版）,2016,37(6):713-718,6.基金项目
国家自然科学基金资助项目（51308323）；山东省自然科学基金资助项目（ZR2011DQ008）；水利部堤防安全与病害防治工程技术研究中心开放课题基金资助项目 （）
