不同固结压力下重塑土微孔隙特征变化的试验与分析  

The exeriment and study on micropore characteristic change of remolded quartz soil in the consolidation process

作　　者：张平[1,2] 房营光[1,2] 何智威[1,2] 袁建滨[1,2] 闫小庆[1,2] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]亚热带建筑科学国家重点实验室,广东广州510641

出　　处：《四川建筑科学研究》2012年第1期102-104,共3页Sichuan Building Science

基　　金：亚热带建筑科学国家重点实验室自主项目(2008ZA11)

摘　　要：土体的微结构对土的工程力学特性具有关键性影响,采用压汞试验方法对重塑土轴向固结过程中不同固结压力水平下的土样进行了试验。试验结果表明:重塑土中介于1000～10000 nm范围的中孔隙所占比例最大,而微孔隙和超微孔隙所占比例均很小;固结压力改变重塑土的孔隙尺度及其分布特征,以致改变了土体的压缩性。The microstructure of soll has a significant influence on soil mechanical behavior. In this paper, the mercury intrusion tests were employed on remolded quartz soil to investigate the relationship between pore distribution of mercury test and stress level due to consolidation. Studies have shown that： middle pores in the range of 1000 - 10000 ran is the largest proportion in the remolded quartz soil, the number of micro-pore and smaller micro-pore is very small; consolidation pressure will significantly change pore scale and pore distribution characteristics of the remolded quartz soil which results in the changes of compressibility.

关 键 词：固结试验 压汞试验 重塑土 孔隙分布 压缩性 

分 类 号：TU411[建筑科学—岩土工程]