中南大学学报（自然科学版）Issue(5)：1838-1844,7.DOI:10.11817/j.issn.1672-7207.2015.05.036
非饱和黄土的结构性与强度特性的关系
Relationship between structure and strength property of unsaturated loess
摘要
Abstract
Based on the stress−strain curves of undisturbed loess, disturbed loess and saturated disturbed loess, structural parameterηwas defined. The effect of confining pressure and moisture content on structural parameter was analyzed, and the relationship between structural strength potential parameter and shearing strength parameter was discussed. The results indicate that the structure of loess is mainly affected by confining pressure and moisture content. The relationship curves between structural strength potential parameter and confining pressure have the very good normalization in a relatively narrow band range. The water content of loess is larger, and its structure parameter’ peak is stronger. The structure parameter increases linearly, then reaches the peak, and later decreases exponentially with the increment of strain. The relationship between structural strength potential parameter and cohesion is exponential and the structural strength potential parameter is linearly related to internal friction angle. The shear strength criterion, which considers structural strength potential parameter, comprehensively specifies strength property of structural soil, and it is superior to Mohr-Coulomb strength criterion, and more in line with actual engineering.关键词
非饱和黄土/结构强度势参数/抗剪强度/围压/含水率Key words
unsaturated loess/structural strength potential parameters/shear strength/confining pressure/moisture content分类
建筑与水利引用本文复制引用
张宁宁,骆亚生..非饱和黄土的结构性与强度特性的关系[J].中南大学学报（自然科学版）,2015,(5):1838-1844,7.基金项目
国家自然科学基金资助项目(51178392)@@@@(Project(51178392) supported by the National Natural Science Foundation of China) （51178392）
