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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, the microstructure of collapsible loess samples artificially prepared under various generalized stress conditions was observed by scanning electron microscope. Quantitative analysis of electron micrographs reveals changes in pore distribution and pore orientation before and after immersion in the specimen. The analysis results show that only the high pressure can only cause the compression of large pores, and the pores of various sizes become smaller after water immersion. When immersed in water under low pressure, in addition to the pore size becomes smaller, there will be micro-cracks around the macropores. The change of pore orientation before and after immersion is not obvious