基于湿载-冻-融耦合作用的黄土灵敏度特性研究  

Sensitivity Properties of Loess Based on Wet Load-Freezing-Thawing Coupling Effects

作　　者：田俊峰[1] 杨更社[1] 叶万军[1] 余翔[1] 魏尧[1] 刘慧[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《人民黄河》2018年第2期121-125,共5页Yellow River

基　　金：国家自然科学基金资助项目(41272340;41172262;41672305)

摘　　要：黄土的灵敏度是黄土结构特性的重要指标。为了研究湿载-冻-融耦合作用对黄土灵敏度特性的影响,取山西阳曲、陕西洛川、陕西宝鸡等地的黄土为研究对象,对经历不同湿载、冻结、融化过程的3种黄土的灵敏度变化规律进行研究。结果表明,湿载是黄土灵敏度变化的主要影响因素,冻融作用是黄土灵敏度的次要影响因素。塑限含水率时,黄土的灵敏度下降幅度最大;饱和含水率时,黄土的灵敏度达到最小值。3种黄土的灵敏度均与湿载-冻-融作用有着良好的函数关系。The sensitivity of the loess is an important indicator of the structure characteristics of loess. In order to study the wet load-freezingthawing coupling effects on the sensitivity properties of loess,the paper took loess of Yangqu in Shanxi,Luochuan and Baoji in Shaanxi as the objects and researched the sensitivity variation of the three different types of loess available after undergoing wet load,freezing and thawing process. The results show that the wet load is the main influencing factor of loess sensitivity; freezing-thawing is secondary influence factors of loess sensitivity. When water content is as the plastic limit,the sensitivity of loess falls to the maximum and the sensitivity of loess reach to the minimum when water content is saturated. The sensitivity of the three types of loess has a good functional relationship with the wet loadfreezing-thawing effects.

关 键 词：湿载-冻-融作用 耦合 灵敏度 黄土结构 

分 类 号：P642.131[天文地球—工程地质学]