本文通过扫锚电镜观察了人工制备的湿陷性黄土试样在各种广义应力状态下的微结构.电镜照片的定量分析揭示了试样浸水前后的孔隙分布和孔隙定向度的变化.分析结果表明,只用高压力只能引起大孔隙的压缩,浸水后则各种尺寸的孔隙均变小.而在低压力下浸水时,则除孔隙尺寸变小外,大孔隙周围还会出现微裂隙.浸水前后孔隙定向的改变不明显.“,”In this paper, scanning electron microscope is used to observe the microstructure of the artificially-prepared structured collapsible loess samples under different generalized stress state. A quantitative analysis technique, named SQM is used to analyze distribution of pores and their orientation of two pairs of sample before or after inundation respectively. It is shown that the high vertical stress can only compress macropores to make them smaller. If the sample is inundated under high vertical stress, all pores will become smaller. As for the sample inundated under low vertical stress, microcracks emerge near some macropores while other pores become smaller. However, the difference in orientation of particles of two samples under different generalized stress state is not so apparent as that in pore distribution except for the sample inundated under low vertical stress.