摘要
以黑龙江地区季节冻土区粉质粘土为例,通过单因素和多因素冻胀性试验研究,分析了冻胀率随含水率、冻结温度及干密度的变化规律,应用spss统计分析软件建立了冻胀率与含水率、干密度及冻结温度的多元线性回归模型。试验结果表明,粉质粘土的冻胀率与含水率、干密度及冻结温度呈较好的线性关系,高含水率、低冻结温度及大干密度会使土的冻胀性加剧;含水率对土的冻胀率影响最显著,其次是冻结温度,干密度最小;多元线性回归模型拟合度较好。
Taking silty clay of seasonal frozen soil in Heilongjiang as example,the frost heave test was carried out to analyze the variation of the frost heaving ratio with moisture content,freezing temperature and dry density.The multiple linear regression models,whose dependent variable was the frost heaving ratio and independent variable was the moisture content,freezing temperature and dry density,were established by spss statistical analysis software.The results show that the frost heaving ratio of silty clay has a good linear relationship with moisture content,freezing temperature and dry density.High moisture content,low freezing temperature and large dry density can increase frost heaving ratio.The impact of moisture content on the frost heaving ratio is the largest,followed by freezing temperatures,and the dry density.In addition,the multiple linear regression model has good fitting effect.
出处
《水电能源科学》
北大核心
2017年第5期153-156,共4页
Water Resources and Power
基金
黑龙江省教育厅科学技术研究项目(12543084)
关键词
季节冻土
粉质粘土
冻胀特性
冻胀率模型
seasonal frozen soil
silty clay
frost heaving characteristic
frost heave rate model
