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| 冻融循环作用下黄土基本物理性质变异性研究 | |
| 引用本文： | 周泓,张泽,秦琦,陈辉.冻融循环作用下黄土基本物理性质变异性研究[J].冰川冻土,2015,37(1):162-168. |
| 作者姓名： | 周泓 张泽 秦琦 陈辉 |
| 作者单位： | 兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州730000;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000;兰州大学土木工程与力学学院,甘肃兰州730000;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州,730000;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000;兰州大学土木工程与力学学院,甘肃兰州730000 |
| 基金项目： | 国家自然科学基金项目(41301070); 中国科学院"西部之光"博士项目(张泽); 教育部留学回国人员科研启动基金项目(第46批)资助 |
| 摘 要： | 以陕西富平重塑黄土为研究对象,引入有关变异性分析的变化量和变异系数两个参数,对历经不同冻融循环次数后黄土的物理性质指标进行清晰全面的描述.结果表明:土样的密度和孔隙比的变化量呈现"共轭"变化,水理性质指标的变化量均随冻融次数的增加而变小;各项指标的变异系数均随冻融次数逐渐减小,即土样内部形成新的结构,并趋于稳定.在分析黄土基本物理性质变异性的基础上,可进一步探讨其内部颗粒排列、粒度成分及矿物成分等的发展转变,为解决该地区冻融黄土的土工问题提供了参考,同时,也是判断其工程性质最基本的依据之一. |
| 关 键 词： | 黄土 冻融循环 物理性质 变化量 变异系数 |
| 收稿时间： | 2014-08-08 |
Research on variability of basic physical properties of loess under freezing-thawing cycles |
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| ZHOU Hong,ZHANG Ze,QIN Qi,CHEN Hui.Research on variability of basic physical properties of loess under freezing-thawing cycles[J].Journal of Glaciology and Geocryology,2015,37(1):162-168. | |
| Authors: | ZHOU Hong ZHANG Ze QIN Qi CHEN Hui |
| Institution: | 1. Key Laboratory of Mechanics on Disaster and Environment in Western China of Ministry of Education, Lanzhou University, Lanzhou 730000, China; 2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 3. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China |
| Abstract: | The remolded loess from Fuping, a county of Shaanxi Province, was taken as the object of study, and variable quantity and variable coefficients were introduced to describe clear the physical properties. It is found that the variable quantity of the density of the loess change almost in the opposite way of that of void ratio. The changing quantities of Atterberg limits become smaller with increase in freezing-thawing cycles; the variable coefficient decreases with increase in freezing-thawing cycles, suggesting that new structures are going to form within the soil and become stable. Based on the variability analysis of the basic physical properties of the loess, it is possible to further discuss the transform in internal particle arrangement, granulometric composition and mineral composition. This research is useful for solving the geotechnical problems of loess under the freezing-thawing cycles in the regions. At the same time, it is also one of the fundamental methods for judging the engineering properties of the loess. |
| Keywords: | loess freezing-thawing cycles physical properties variable quantity variable coefficients |
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