摘要
本文结合扫描电镜照片(SEM)分析黄土湿陷过程中各组成单元微观结构的变化,引入方向性孔隙度函数,得出黄土的湿陷变形过程就是土体孔隙结构系数Jf值由小到大、再变小的变化过程。提出用孔隙结构系数Jf的值代替规范中黄土湿陷起始压力的判断标准。
Loess collapsibility is the result of interaction of each composing cell in loess. The paper analyzed the microstructure's deformation during loess collapse with scanning pictures (SEM). The function of direction porosity was introduced to come to the conclusion: the value (J_f) of void fabric tensor of loess varies from small to big then to small during the process of loess's collapse and deformation. Finally, a method is put forward, the value of void fabric tensor (J_f) can be used to replace the judging standard of the beginning stress of loess collapsibility in regulations.
出处
《水文地质工程地质》
CAS
CSCD
2004年第2期1-3,共3页
Hydrogeology & Engineering Geology
关键词
黄土湿陷性
微观结构
方向性孔隙度函数
孔隙结构系数
loess collapsibility
microstructure
the function of direction porosity
void fabric tensor
