水利水电技术2017，Vol.48Issue(12)：168-173,6.DOI:10.13928/j.cnki.wrahe.2017.12.027
粒径对膨胀土无荷膨胀率的影响研究
Study on effect from particle size on load-free swelling rate of expansive soil
摘要
Abstract
In order to study the effect from particle size on the experimental result of the load-free swelling rate of remolded soil,an experiment on the load-free swelling rate of remolded soil with the combinations of different proportions is carried out by crushing the mudstone from a foundation into three different particle sizes,i.e.,1 ～2 mm,0.1 ～ 1 mm and ＜0.1 mm,under the experiment condition that complies with the relevant specifications.The experiment result shows that larger differences are there among the experiment results of the load-free swelling rates of the expansive soil samples with different particle sizes,furthermore,the experiment results of the load-free swelling rates under different particle size combinations present the normal distribution trends,while the value of the load-free swelling rate at the peak value is the stable and reliable load-free swelling rate for the remolded soil,and then the particle size gradation with the experiment result of the load-free swelling rate approaching the value of the load-free swelling rate at the peak value is the best gradation.Through the relevant analysis,it is obtained that the particle size gradations which can make the experiment results of the load-free swelling rates of the remolded soil stable and reliable are 1 ～2 mm,0.1 ～ 1 mm and ＜0.1 mm with the mass ratio of 0∶ 100∶0,thus the particle size range that can make the experiment result of the load-free swelling rate of the remolded soil stable and reliable is 0.1 ～ 1 mm.Only within this particle size range,the experiment result of the load-free swelling rate of the remolded soil can be most real and correct.关键词
膨胀土/无荷膨胀率/粒径级配/正态分布Key words
expansive soil/load-free swelling rate/article size gradation/normal distribution分类
建筑与水利引用本文复制引用
李进前,王起才,张戎令,王冲,崔晓宁,王炳忠..粒径对膨胀土无荷膨胀率的影响研究[J].水利水电技术,2017,48(12):168-173,6.基金项目
国家自然科学基金项目(51768033) （51768033）
教育部长江学者和创新团队滚动支持发展计划(IRT_15R29) （IRT_15R29）
中国铁路总公司科技研究计划(Z2015-G001) （Z2015-G001）
青年人才托举工程(2015QNRC001) （2015QNRC001）
飞天学者特聘计划 （）
