作　　者： (周晖）; (吴俊桦）;

机构地区： 广州城建职业学院,广州510925

出　　处： 《工业建筑》 2017年第8期95-99,共5页

摘　　要： 基于Sierpinski分形模型,对珠江三角洲地区软土固结过程中的ESEM图片进行测试,对孔径及孔隙分布分维值进行计算。研究表明:软土孔隙具有明显的分形特征,测试得到的Sierpinski分形模型的线性相关系数均达到了95%以上,且重塑土的孔隙分布分维及孔径分维值均较原状土小;固结初期孔隙分布分维值变化不明显,当荷载增大时,孔隙分布分维及孔径分维均明显减小,此时孔径大小逐渐变得均匀,大孔隙变成了中小孔隙;当荷载继续增大时,软土孔隙较难向颗粒间超微孔隙发展,软土孔隙分维值也趋于稳定;研究还发现,软土的渗透性随着孔径分维和孔隙分布分维值的减小而减小。 This Pearl River Delth（ PRD） soft soil environmental scanning electron microscope（ ESEM） pictures were tested,and the tractal dinonsion of pore size and pore distribution were calculated based on the Sierpinski fractal model.The research showed that the soft soil pore had obvious features in fractal features,and the trareal dimension of pore size and pore distribution of remoulded soil was lower than its natural state. The reducing of pore distribution fractal dimension was not obvious at earlier consolidation process. The fractal dimension reduced obviously when the load was larger and the pore size became uniform and smaller. When the load continued to grow,the soft soil＇s pores would be hard to develop into a micropore between partides,the pore fractal dimension became more stable. The research also showed that the permeability of soft soil would reduce when the fractal dimension of pore size and pore distribution reduced.

关 键 词： 珠江三角洲软土 渗流固结特性 土体微观结构 分形特征