邯郸击实膨胀土的微结构与含水量关系研究  

The relation of compacted expansive soils between microstructure and water content in Handan

作　　者：贾东亮[1] 牛兰芹[1] 李燕[1] 

机构地区：[1]河北工程大学土木学院,河北邯郸056038

出　　处：《河北建筑科技学院学报》2006年第2期57-62,共6页Journal of Hebei Institute of Architectural Science & Technology

基　　金：河北省自然科学基金(D2004000463);河北省科技攻关项目(05547009D-2)资助特约专稿

摘　　要：定性分析了邯郸击实膨胀土在不同含水量下的结构形式,发现邯郸击实膨胀土的微结构在含水量较低时,表现为集粒结构;在含水量较高时,定向性增强,趋于紊流结构。利用Matlab数字图形处理工具,结合像素的概念,通过编程计算不同含水量下土的颗粒分布分维,发现含水量较低时,分维值较大,颗粒集团化低;含水量较高时,分维值较小,颗粒集团化高。The structure form of compacted expansive soils under different water content are analyzed qualitatively. The results show that microstructure is aggregate structure under low water content, and the direction character become outstanding with the increasing of water content , furthermore trend to turbulent structure. The soils have fractal character is made sure by Matlab. The grain array form is described quantitatively by fractal dimension of grain distribution. The results show that with the increasing of water content, fractal dimension of grain distribution value is decreasing and grain conglomeration degree is strengthened.

关 键 词：击实膨胀土 集粒结构 紊流结构 含水量 分形 颗粒分布分维 

分 类 号：TU443[建筑科学—岩土工程]