摘要
采用压汞法对天然结构性软土压缩过程孔隙大小分布的演化进行了试验研究,结果表明,当荷载超过结构屈服应力后,尺寸较大的团粒间孔隙首先发生破坏,随着荷载的增大,越来越小的孔隙受到影响,但团粒内孔隙在压缩过程中不发生变化;根据试验结果提出了孔隙结构破损势的概念,并用其表征孔隙分布随荷载变化的规律。
Freeze dehydration and mercury intrusion porosimetry were used to study the change of pore size distribution of a structured soft soil during one-dimension compression. It was found that when pressure increased beyond the structure yield stress, the largest pores began to break down. If the pressure was increased continuously, smaller pores would be affected; but the intra-aggregate pores could not be changed during compression. Pore structure breakage potential was defined in terms of the evolution of the pore size distribution in different stress level.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2003年第4期573-578,共6页
Rock and Soil Mechanics
基金
广西自然科学基金资助项目(0249011)
广西大学博士科研启动基金资助项目。
关键词
软土
结构性破损
孔径分布
压汞试验
孔隙结构
Compression testing
Pore size
Soil mechanics
Soil testing
Yield stress
