| 重塑马兰黄土渗透性试验研究 |
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| 引用本文： | 洪勃, 李喜安, 陈广东, 骆建文, 李林翠. 2016: 重塑马兰黄土渗透性试验研究. 工程地质学报, 24(2): 276-283. DOI: 10.13544/j.cnki.jeg.2016.02.014 |
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| 作者姓名： | 洪勃 李喜安 陈广东 骆建文 李林翠 |
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| 作者单位： | 1.长安大学地质与测绘工程学院 西安 710054;;2.国土资源部岩土工程开放研究实验室 西安 710054;;3.河南省地质环境监测院 郑州 450016;;4.西安长庆科技工程有限责任公司 西安 710021 |
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| 基金项目： | 国家自然科学基金项目(No.41172255,41572264,41440044),中央高校基本科研业务费项目(2014G2260008),西安长庆科技工程有限责任公司资助项目(CTEC (2014) Z-KY-013)资助 |
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| 摘 要： | 为了研究干密度和初始含水率对重塑黄土渗透性的影响,对延安新区I期工程所取的重塑马兰黄土进行了饱和渗透试验。结果表明:在非饱和状态,干密度对饱和时间的影响最为显著,饱和时间随干密度的增大而增大,而初始含水率对饱和时间的影响不明显。重塑马兰黄土的渗透系数随着干密度的增大而减小,其关系可以拟合为幂函数关系。在一定干密度范围内,渗透系数随初始含水率的增大而减小,其关系可以用直线关系拟合。渗透系数与孔隙比之间可以用幂函数关系拟合,渗透系数随孔隙比的减小而减小。初始含水率、干密度以及孔隙比都是影响重塑黄土渗透性的重要因素,其主要是通过对试样微结构的影响而影响渗透系数。该研究对延安新区的工程建设具有一定的理论指导和实际应用价值。
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| 关 键 词： | 马兰黄土 渗透系数 干密度 含水率 试验 |
| 收稿时间： | 2015-07-24 |
| 修稿时间： | 2015-11-05 |
EXPERIMENTAL STUDY OF PERMEABILITY OF REMOLDED MALAN LOESS |
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| HONG Bo, LI Xi'an, CHEN Guangdong, LUO Jianwen, LI Lincui. 2016: EXPERIMENTAL STUDY OF PERMEABILITY OF REMOLDED MALAN LOESS. JOURNAL OF ENGINEERING GEOLOGY, 24(2): 276-283. DOI: 10.13544/j.cnki.jeg.2016.02.014 |
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| Authors: | HONG Bo LI Xi'an CHEN Guangdong LUO Jianwen LI Lincui |
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| Affiliation: | 1.School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054;;2.Open Research Laboratory of Geotechnical Engineering, Ministry of Land and Resources, Xi'an 710054;;3.Henan Institute of Geological Environment Monitoring, Zhengzhou 450016;;4.Company limited of Chang-qing Science and Technology, Xi'an 710021 |
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| Abstract: | This paper examines the influence of dry density and initial moisture content to the remolded loess permeability. It carries out the permeability test of Malan remolded loess in I phase project of Yan'an New District. The results show that under non-saturation conditions, the time that samples take to get saturated getting longer with the increase of dry density. So the dry density influence on penetration time is most significant, but the initial moisture content is not obvious. Remolded Malan loess permeability coefficient decreases with the increase of initial water content and dry density and gradually tends to stabilize. The relationship between them can be fitted to a power function. Within a certain scope around dry density, the permeability coefficient decreases with the initial water content. Their relation curve can be coupled to a linear equation. The permeability coefficient reduces with the decrease of the void ratio. Moreover, there has a power function relationship between them. The initial moisture content, dry density and void ratio are important factors affecting the permeability of remodeling loess, which has a great influence on the micro-structure of the sample, and leads to the influences to its permeability. This study has many theoretical guidance and practical application value for the engineering construction of Yan'an New District. |
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| Keywords: | Malan loess Permeability coefficient Dry density Moisture content Experiment |
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