（1 广州大学土木工程学院，510006；2 广东科学中心筹建办公室 广州 510033）

［提要］利用液氮冷冻制样、扫描电镜和计算机图像处理技术，采用多元逐步线性回归的方法，对广东科学中心46组饱和软土试样的颗粒分布分维值、孔隙分布分维值、孔隙度、孔隙总面积、孔隙总个数、平均孔隙周长、孔隙平均直径及孔洞的复杂度等微结构参数与压缩系数、压缩模量、内聚力和内摩擦角等宏观工程性质参数的关联性进行了分析，初步探讨了饱和软土微结构参数对工程性质的影响，为饱和软土微观结构力学理论的进一步发展提供了思路和方法。

［关键词］定量分析；线性回归；饱和软土；液氮制样技术；扫描电镜

Research on Engineering Property of Saturation Soft Soil Based on Microstructure Parameters/Zhang Jichao1, Xu Yong1, Li Wuping1, Zhu Lihong2, Yi He2, Wang Liangfu2(1 School of Civil Engineering, Guangzhou University, Guangzhou 510405, China; 2 Guangdong Scientific Center, Guangzhou 510033, China)

Abstract:With the liquid nitrogen refrigeration sample-made technique, the scan electronic microscope technique (SEM) and the image processing，analysis and computer vision technique，46 group sample"s microstructure parameters of saturation soft soil which withdraw from Guangdong Scientific Centre have been extracted. By adopting multivariable gradually linearization regress analysis，some numerical formulas between the micro-structural parameters and the engineering properties such as compression coefficient, compression module, cohesion and internal friction angle have been established. Some basic principles come into being to explain the macro-engineering phenomenon.

Keywords:quantitative analysis；multivariable gradually linearization regress analysis；saturation soft soil；liquid nitrogen refrigeration sample-made technique；SEM