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非饱和黄土的结构变化特性
引用本文:骆亚生,谢定义,邵生俊.非饱和黄土的结构变化特性[J].西北农林科技大学学报(社会科学版),2004,32(8):114-118.
作者姓名:骆亚生  谢定义  邵生俊
作者单位:1. 西安理工大学,岩土研究所,陕西,西安,710048;西北农林科技大学,水利与建筑工程学院,陕西,杨凌,712100
2. 西安理工大学,岩土研究所,陕西,西安,710048
基金项目:国家自然科学基金项目(10172070),西北农林科技大学青年科研专项基金项目"黄土结构性对其动、静力学特性的影响研究"
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。

关 键 词:非饱和黄土  结构性参数  土结构性
文章编号:1671-9387(2004)08-0114-05
收稿时间:2/9/2004 12:00:00 AM
修稿时间:2004年2月9日

Variation characteristics of soil structure of unsaturated loess
LUO Ya-sheng.Variation characteristics of soil structure of unsaturated loess[J].Journal of Northwest Sci-Tech Univ of Agr and,2004,32(8):114-118.
Authors:LUO Ya-sheng
Institution:LUO Ya-sheng~
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.
Keywords:unsaturated loess  structural parameter  structural characters of intact loess
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