摘要
针对甘肃皋兰湿陷性黄土,设计室内浸水试验,借助ImageJ软件对扫描电子显微镜获取黄土浸水前后的微观图像进行定量分析。结果表明:当竖向压力大于400 kPa时,竖向压力对工程区黄土湿陷性影响减弱,剩余沉降主要由黄土亲水性造成;黄土湿陷表现为土体压缩变形增加,土体结构发生重新排列,大、中孔隙减少,小孔隙增多;土体结构重新排列从微观角度解释了浸水作用下黄土结构的变化特性。
An indoor immersion test was carried out for the collapsible loess in Gaolan(Gansu Province),where ImageJ application conducted a quantitative analysis on the loess microgram scanned before and after immersion.The result shows that,when the vertical pressure is greater than 400 kPa,the influence of vertical pressure on the collapsibility of loess in the engineering area is weakened,and the residual settlement is mainly resulted from the hydrophilicity of loess.The loess collapsibility is characterized by:deteriorated compression deformation of the soil mass,rearranged soil structure,decreased large and medium pores,and increased small pores.The rearrangement of soil structure explains the change characteristics of loess structure under water immersion from a microscopic point of view.
作者
石福周
岳立将
金仁才
黄金坤
卲传林
SHI Fuzhou;YUE Lijiang;JIN Rencai;HUANG Jinkun;SHAO Chuanlin(Lanzhou University of Technology,Lanzhou 730050,China;China MCC17 Group Co.,Ltd.,Ma'anshan 243000,Anhui,China)
出处
《路基工程》
2025年第3期56-61,共6页
Subgrade Engineering
关键词
公路路基
湿陷试验
微观结构
竖向压力
压缩变形
定量分析
结构性
highway subgrade
collapsible test
microstructure
vertical pressure
compression deformation
quantitative analysis
structural
