水利水电技术2018，Vol.49Issue(5)：123-128,6.DOI:10.13928/j.cnki.wrahe.2018.05.019
低黏土矿物含量泥岩的自由膨胀率试验研究
Experimental study on free expansion rate of mudstone with low clay mineral content
摘要
Abstract
Aiming at the deficiencies of the methods for the experiment on the free expansion rate prescribed in the existing criteria concerned,the mudstone with low clay mineral content got from the foundation of a project is crushed on the basis to meet the experiment requirement prescribed in the relevant criteria,from which the experiment on the free expansion rates of the crushed mudstones with three particle sizes,i.e.0.5 ～ 0.25 mm,0.25 ～ 0.1 mm and ＜ 0.1 mm are made in accordance with various combinations of mass proportions,so as to obtain more accurate and representative experimental result of free expansion rate.The result indicates that for the same kind of mudstone sample,the experiments on the free expansion rate finished according to the criteria concerned can possibly lead to different gradations due to different experiment personnel and operation processes,and then produce quitedifferent experimental results,while the results accord with the normal distribution as well.Through analysis,it is suggested to carry out the experiment of free expansion rate with the gradations of 60 ∶ 40 ∶ 0,40 ∶ 20 ∶ 40 and 20 ∶ 20 ∶ 60 of the mass proportions for the three ranges of particle size mentioned above.The relevant verification finds out that the experimental result from the suggested gradations can be more synchronized with all the indexes concerned and then accurately judge the expansive soil.The experimental results can provide references for further improving the relevant engineering geological criteria.关键词
自由膨胀率/泥岩/膨胀土/级配/正态分布Key words
free expansion rate/mudstone/expansive soil/gradation/normal distribution分类
建筑与水利引用本文复制引用
王冲,王起才,张戎令,崔晓宁,李进前,祁强..低黏土矿物含量泥岩的自由膨胀率试验研究[J].水利水电技术,2018,49(5):123-128,6.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）
甘肃省基础研究创新群体(145RJIA332) （145RJIA332）
兰州交通大学(201606)优秀平台资助 （201606）
飞天学者特聘计划 （）
陇原青年创新人才扶持计划 （）
