岩土力学Issue(10)：2794-2800,7.
不同固结压力下强结构性黏土孔隙分布试验研究
Experiment study of pore distribution of strong structural clay under different consolidation pressures
摘要
Abstract
Mercury injection test on Zhanjiang natural soft clay and compressed soil is conducted to obtain the microscopic deformation mechanism of structured soft clay. Evolutions of pore distribution, size, and structural characteristic parameters under different consolidation pressures are analyzed; the pore morphology is further quantitatively analyzed by SEM image, which is explained and testified by fractal theory. The results show that, a positive correlation is shown between the sensitivity of each pore size to external forces and pore volume content. The distribution density of the fine pores might be exaggerated while the one of macro pores might be underestimated in mercury injection test for the bottleneck effect. Pore distribution is affected by structure. When consolidation pressure increases to yield pressure, pores of 0.01-0.50μm are changing obviously, pore connectivity becomes worse, pore size decreases, isolated pores increase, and limits between pore sizes become unobvious. Zhanjiang soft clay has multi-fractal characteristics, the limits for determining micro-pores, interparticle pores and isolated pores are 0.01μm and 0.50μm. Pore size division standard is given.关键词
结构性黏土/孔隙/压汞试验/固结压力/分形维数Key words
structural clay/pore/mercury injection test/consolidation pressure/fractal dimension分类
建筑与水利引用本文复制引用
张先伟,孔令伟,郭爱国,拓勇飞..不同固结压力下强结构性黏土孔隙分布试验研究[J].岩土力学,2014,(10):2794-2800,7.基金项目
国家自然科学基金项目(No.41102200，No.51179186)。 （No.41102200，No.51179186）
