摘要
本文以淮南刘庄煤矿主井地基的人工冻融土为研究对象,以偏光显微镜,扫描电镜(SEM)为主要研究手段,研究分析了人工冻融土与原状土的中微观结构、冻融前后的中微观结构的变化规律及内在原因。此外,还研究分析了人工冻融土冻融前后的中微观结构及其变化与人工冻融土的物理、力学、工程性质之间的关系。研究显示中微观结构对人工冻融土的物理、力学、工程性质有很大的影响,冻融前后中微观结构的变化受到土的种类、埋深、原状土的中微观结构等因素的影响,且冻融前后的中微观结构的变化在一定程度上主导了冻融前后的物理、力学、工程性质的改变。
This paper, taking the artificial freeze-thaw soils as study objects , polarizing microscope.scanning electron microscope（SEM） as main means, studied and analyzed the meso-and micro-structure of artificial freeze-thaw soils and undisturbed soils .the changes of meso-and micro-structure before and after freeze-thaw and the underlying causes of these changes .In addition, this paper also studied and analyzed the relationship between the meso-and micro-structure and its changes before and after freeze-thaw and the physical.mechanical.engineering property .The study showed that the meso-and micro-structure had great impact on the physical property.mechanical property and engineering property of the artificial freeze-thaw soils ,the factors of influencing the changes of the meso-and micro-structure were the variety of soil .depth .the meso-and microstructure of undislurbed soil and so on, and these changes dominated the changes of the physical property.mechanical property and engineering property.
关键词
人工冻融土
中观结构
微观结构
物理性质
力学性质
工程性质
artificial freeze-thaw soils
meso-structure
micro-structure
physical property
mechanical property
engineering property.
