【摘要】 以陕西杨凌原状黄土和人工结构性黄土为研究对象,通过非饱和黄土的压缩试验获取的基本资料,求取非饱和黄土在不同结构状态下的综合结构势参数,研究了黄土在压缩试验状态下的结构变化特性。结果表明,对于原状结构黄土,含水率对结构性参数影响明显,含水率愈低同一压力下对应的结构性参数愈大,尤其在低含水率区域,含水率变化强烈影响黄土的结构性;对于人工结构性黄土,黄土的结构性受密度、含水率和水泥含量的耦合因素影响,总体表现为干密度愈低、含水率愈小、水泥含量愈高,黄土的结构性愈强。更多还原

【Abstract】 With the primary data obtained in the confined compression tests of unsaturated loess including Yangling intact loess and men-made structural loess,the comprehensive structure potential parameters of unsaturated loess are calculated under different structure conditions in this paper.Based on the above,the variation characteristics of soil structure of unsaturated loess are studied under the condition of confined compression test,and thereby,the useful quest using the research outcomes of characteristics of soil structure to solve the engineering problem of loess is made out.The research results show that the water content in intact structural loess influences the structural parameter obviously,i.e.,the lower water content,the bigger structural parameter according to same pressure,especially at the areas of low water content,the structural characteristics are influenced by the variation of water content strongly;and for the man-made structural loess,the structural characteristics of loess are influenced by the coupling factors including density,water content and cement content,etc.The collective performance is that,the lower is the dry density,the smaller is the water content,the higher is the cement content,and the stronger are the structural characteristics of loess.更多还原