| 不同干密度压实黄土的非饱和渗透性曲线特征及其与孔隙分布的关系 |
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| 引用本文： | 李华,李同录,张亚国,李萍,范江文. 不同干密度压实黄土的非饱和渗透性曲线特征及其与孔隙分布的关系[J]. 水利学报, 2020, 51(8): 979-986 |
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| 作者姓名： | 李华 李同录 张亚国 李萍 范江文 |
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| 作者单位： | 长安大学地质工程与测绘学院,陕西西安710054;黄土高原水循环与地质环境教育部野外科学观测研究站,甘肃正宁745399;黄土高原水循环与地质环境教育部野外科学观测研究站,甘肃正宁745399;长安大学建筑工程学院,陕西西安710054 |
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| 基金项目： | 国家自然科学基金项目（41790442，41772278） |
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| 摘 要： | 压实黄土在水分入渗条件下容易产生湿陷、不均匀沉降等工程地质问题,因此有必要对其渗透特性进行研究。本文采用基于滤纸法的竖直土柱试验测试了3种不同干密度压实黄土全吸力范围的渗透性曲线。试验结果表明,压实黄土的渗透性曲线随着基质吸力减小分为缓升段、陡升段和饱和段三个阶段,且干密度越小的土三段特征越明显。压实黄土干密度的差异主要影响低吸力段渗透系数,干密度越大,渗透系数越小;基本不影响高吸力段渗透系数。由于渗透系数与孔隙分布密切相关,孔隙越多渗透性越强。因此本文用压汞试验测得了3种土样的孔隙分布曲线。试验表明不同干密度的压实黄土,微孔数量基本相同,对应吸力范围的渗透系数也相同;孔径为1.3μm
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| 关 键 词： | 压实黄土 渗透性曲线 干密度 孔隙分布 |
| 收稿时间： | 2019-10-07 |
Relationship between unsaturated permeability curve and pore-size distribution of compacted loess with different dry density |
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| LI Hu,LI Tonglu,ZHANG Yaguo,LI Ping and FAN Jiangwen. Relationship between unsaturated permeability curve and pore-size distribution of compacted loess with different dry density[J]. Journal of Hydraulic Engineering, 2020, 51(8): 979-986 |
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| Authors: | LI Hu LI Tonglu ZHANG Yaguo LI Ping FAN Jiangwen |
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| Affiliation: | School of Geological Engineering and Surveying, Chang''an University, Xi''an 710054, China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, Zhengning 745399, China,School of Geological Engineering and Surveying, Chang''an University, Xi''an 710054, China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, Zhengning 745399, China,Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, Zhengning 745399, China;Department of Civil Engineering, Chang''an University, Xi''an 710054, China,School of Geological Engineering and Surveying, Chang''an University, Xi''an 710054, China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, Zhengning 745399, China and School of Geological Engineering and Surveying, Chang''an University, Xi''an 710054, China;Water Cycle and Geological Environment Observation and Research Station for the Chinese Loess Plateau, Ministry of Education, Zhengning 745399, China |
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| Abstract: | |
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| Keywords: | compacted soil permeability curve dry density pore-size distribution |
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