动力排水固结前后软土微观结构分析  

Analysis of microstructure of soft clay before and after its improvement with dynamic consolidation by drainage

作　　者：孟庆山[1] 杨超[1] 许孝祖[2] 雷学文[2] 孙士玲[2] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,武汉430071 [2]武汉科技大学,武汉430070

出　　处：《岩土力学》2008年第7期1759-1763,共5页Rock and Soil Mechanics

基　　金：中国科学院武汉岩土力学研究所知识创新工程领域前沿项目(NoO712041Q01);国家自然科学基金重点项目(No50639010);中国科学院岩土力学重点实验室开放课题(NoZ000602)

摘　　要：通过液氮冷冻干燥制样技术制备饱和软土试样,借助扫描电子显微镜技术,得到经室内动力排水固结前后土样的微观结构图像,用编制的计算机程序分析其微观结构参数变化。通过比较试样的孔隙个数、总面积、总周长、面积分级、平均孔径、形状系数、圆度和各向异性率、分形维数,研究了在动力排水固结作用下土体微观结构在垂直向和水平向发生的变化。Based on the sample-made technology of the liquid nitrogen freeze-dry, samples of saturation soft soil have been prepared. With the help of scanning electron microscope （SEM） technology, the microstructure images of the soft clay before and after its laboratory improvement with dynamic consolidation by drainage are obtained. The change of its microstructure parameters is studied by a developed computer program. Through comparing the results in terms of the number of pore, total area, total perimeter, the classification of area, the average diameter, and the shape coefficient, the roundness, the anisotropy, fractal dimension, the change of the soil microstructure after the improvement with dynamic consolidation by drainage has been studied preliminarily.

关 键 词：软土 动力固结 扫描电镜 微观结构 

分 类 号：TU411.92[建筑科学—岩土工程]