黄土湿陷系数与其物性指标的定量关系分析  

Quantitative relationship between the collapsibility coefficients and physical indexes of loess

作　　者：任文博 胡少磊 刘云龙[1] 李佳佳 李磊 REN Wenbo;HU Shaolei;LIU Yunlong;LI Jiajia;LI Lei(Zhengzhou University,Zhengzhou 450001,Henan,China;China Construction Seventh Engineering Division Co.,Ltd.,Zhengzhou 450004,Henan,China;Sanmenxia National Highway 310 South Project Construction Management Co.,Ltd.,Sanmenxia 472000,Henan,China)

机构地区：[1]郑州大学,河南郑州450001 [2]中国建筑第七工程局有限公司,河南郑州450004 [3]三门峡市国道三一零南移项目建设管理有限公司,河南三门峡472000

出　　处：《地震工程学报》2023年第2期311-318,共8页China Earthquake Engineering Journal

摘　　要：湿陷性是黄土特殊且重要的工程性质。以黄土微观角度探讨湿陷性与物性指标之间的关系,再依据《中原城市群环境地质调查》统计得到的洛阳地区湿陷性黄土土性参数,运用MATLAB定量分析黄土湿陷性与其物性指标的相关性,得到如下结果:(1)在众多与湿陷性相关的物性参数中,洛阳地区黄土湿陷系数与孔隙比、干密度、塑性指数等物性指标关系密切,且相关性程度依次为孔隙比、干密度和塑性指数;(2)运用MATLAB分析湿陷系数与物性指标的定量关系,得到了该地区湿陷系数与物性指标之间函数关系的拟合公式;(3)通过实测值与预测值的比较,结合黄土的湿陷机理,论证拟合公式的合理性。研究方法对其他地区黄土湿陷系数的预测也具有启发意义。Collapsibility is an important engineering property of loess.In this study,the relationship between collapsibility and physical property indicators is first discussed in the context of the loess microstructure,and then the soil parameters of the collapsible loess in the Luoyang area are obtained on the basis of the Environmental Geological Survey of Central Plains City Group.Finally,the correlation between the collapsibility and physical property indicators of loess is quantitatively analyzed using MATLAB.The results are as follows:(1)Among the physical property parameters related to collapsibility,the loess collapsibility coefficient in the Luoyang area is closely related to the void ratio,dry density,and plasticity index;the degree is in the order of void ratio,dry density,and plasticity index;(2)MATLAB is used to analyze the quantitative relationship between loess collapsibility coefficients and physical property indexes,and the fitting formula of the functional relationship between them in the study area is obtained;(3)Combined with the collapsible mechanism of loess,the rationality of the fitting formula is demonstrated by comparing the measured value with the predicted value.The research method used in this paper also has an enlightening significance for the prediction of the loess collapsibility coefficient in other areas.

关 键 词：黄土湿陷变形 物性指标 MATLAB数值分析 湿陷机理 

分 类 号：TU43[建筑科学—岩土工程]