粘性土的微观结构分析技术研究

RESEARCH ON THE ANALYSIS TECHNIQUES FOR CLAYEY SOIL MICROSTRUCTURE

重点介绍了工程粘性土微观结构研究方面的一些新技术、新成果和新发展，主要包括供扫描电镜（ＳＥＭ）分析用的处理高含水量土样的冷冻刀切干燥法、定量评粘性土微观结构的图象处理技术、测定粘性土粒间胶结物化学成分的ＥＤＸ技术和无损伤探测土体内部结构的ＣＴ技术．

Microstructure of clayey soil is an important factor determining engineering properties of the clayey soil. Several latest techniques for analyzing microstructures of engineering clayey soil are presented, including the freeze-cut- drying method for preparing a soil specimen of high moisture content for analysis with scanning electronic microscopy (SEM), image processing technique for quantifying the microstructure of the soil, the application of the energy dissipate X-ray technique (EDX) in determining the interparticle chemical compositions, and the CT technique in monitoring the development of internal failure in soil under loading. These techniques provide a series of effective tools to analyze systematically the microstructure and internal failure evolution of engineering clayey soil.