湿陷系数与黄土宏观结构的关系研究  

Research on the relationship between loess macro-structure and collapsibility coefficient

作　　者：潘蕾[1] 张远芳[1] 陈敬知 张运海[1] PAN Lei;ZHANG Yuanfang;CHEN Jingzhi;ZHANG Yunhai(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《水资源与水工程学报》2018年第3期220-224,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(41262012);新疆农业大学研究生校级创新项目(XJAUGR2016-031)

摘　　要：为探究湿陷系数与黄土宏观结构性的关系,对新疆区域内不同深度的原状黄土和重塑黄土进行了増(减)湿条件下的湿陷性试验,根据试验结果得出新疆黄土的湿陷曲线随初始含水率的变化特征,并从静力势能角度对湿陷系数和结构性关系进行解读:湿陷系数表征了单位厚度原含水率土体与饱和土体之间浸水饱和作用产生的宏观结构性差异。基于湿陷系数对黄土结构"可稳性"及"可变性"进行了探讨,并得出两者随初始含水率的变化规律。湿陷系数更适用于描述黄土结构性的改变,可以分析在不同工况下黄土结构稳定性和可变性的发展趋势。In order to study the relationship between macro-structure of loess and collapsibility coefficient,the loess collapsibility tests of Xinjiang＇s undisturbed loess and disturbed loess from various depths have been carried out under the condition of adding or reducing moisture. The collapsibility curve＇s variable features over initial water content have been reached based on the study results,and the relationship between macro-structure and loess collapsibility coefficient has been analyzed from the perspective of static potential energy. Collapsibility coefficient represents the macro-structural differences derived from saturation between original loess and saturated loess of unit thickness. Based on collapsibility coefficient,the paper discussed loess structural ＂ stability＂ and ＂ variability＂,and obtain the change rules along with initial water content. Collapsibility coefficient is more suitable at describing the change of the loess structure,and the tendency of loess structural ＂ stability＂ and ＂ variability＂ in various conditions could be analyzed.

关 键 词：初始含水率 湿陷系数 宏观结构性 可稳性 可变性 黄土 

分 类 号：TU411.5[建筑科学—岩土工程]