摘要
膨胀岩与膨胀土在物理性质、亲水性质及胀缩性方面存在显著的差别,采用单指标判定带来不准确性,需要建立膨胀岩多指标体系.通过对南水北调中线工程黄河北—羑河北渠段的膨胀性黏土岩物理性能试验数据的统计分析,得出影响黏土岩自由膨胀率的主要物理性质指标为液限.考虑到粒度组成中的黏粒含量和胶粒含量一定程度上可以反映出膨胀岩亲水性的强弱,建立了自由膨胀率与液限、黏粒含量、胶粒含量的定量关系,给出了同时考虑自由膨胀率、液限、黏粒含量、胶粒含量的膨胀岩膨胀潜势等级划分的建议值,为膨胀岩的判别提供参考.
There are prominent differences in physical appearance,hydroscopicity,swell-shrink characteristics between expanded swelling rock and soil.There is a need to build up a comprehensive evaluation model.By an analysis of physical performance data of the claystone distributing along the middle route of the South-to-North water transfer project area in the section of the north of Yellow River to the north of the Youhe River,the most important index of free swelling is presented,which is liquid limit.Considering important function of clay content and colloid content which can reflect hydrophilicity to a certain point,the comprehensive evaluation model and regression equation were built up by free swelling,liquid limit, clay content,colloid content.The suggestive value of the four indexes under different expansive potentia were listed,which provided a reference to assess the swell rock.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2010年第5期40-43,共4页
Journal of Zhengzhou University（Engineering Science）
基金
国家"十一五"科技支撑计划(2006BAB04A10)
关键词
膨胀岩
自由膨胀率
拉依达准则
回归分析
判别
expanded swelling rock
free swelling
PauTa code
stepwise regression analysis
discrimination
