岩土工程学报2016，Vol.38Issue(7)：1254-1261,8.DOI:10.11779/CJGE201607012
人工冻融软黏土微观孔隙变化及分形特性分析
Micro pore change and fractalcharacteristics ofartificial freeze thawsoft clay
摘要
Abstract
In order to investigate the microscopic mechanism of thawing collapse and compression characteristics ofsoft clay, the thawing collapse tests, compression tests and mercuryintrusionporosimetry (MIP)are adopted to study microscopic pore distribution and change of soft clayinNingbo area during the period before and after freezing, thawing and compression.A method for pore diameter divisionof four kinds of soil samples is proposed, including undisturbed soil, melted soil, compressed undisturbed soil and compressed thawing soil.Through scanning electron microscopy and mercury intrusion tests, the microstructural changes of freeze-thaw soft clayare analyzedaccording to the fractal theory of mercury.The characteristics of pore diameterdistribution of soft clay are investigated, andthe pore volume and area distribution are calculated by the capacity dimension. The results show that the pore volume and area of soft clay both increase after melting.The pore volume and area of undisturbed soil and thawing soil bothdecrease after compression, and more than80% ofpore volume and area of soft clayare distributed in the micro pores and ultra-micro pores. Besides, fractal characteristics exist inthepore volume and area.关键词
人工冻融软黏土/融沉特性/微观孔隙/压汞法/分形理论Key words
artificial freeze-thaw soft clay/thawingcharacteristic/microstructure of soil/mercuryintrusion porosimetry/fractal theory分类
建筑与水利引用本文复制引用
王升福,杨平,刘贯荣,樊文虎..人工冻融软黏土微观孔隙变化及分形特性分析[J].岩土工程学报,2016,38(7):1254-1261,8.基金项目
国家自然科学基金项目（51478226）；江苏省高校优势学科建设工程项目（PAPD）；江苏省普通高校研究生科研创新计划项目 （）
