| 压实红黏土的持水性能与机制分析 |
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| 引用本文： | 谈云志,孔令伟,郭爱国,万智,张华.压实红黏土的持水性能与机制分析[J].岩土力学,2011,32(Z1):334-0338. |
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| 作者姓名： | 谈云志 孔令伟 郭爱国 万智 张华 |
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| 作者单位： | 1. 三峡大学 三峡库区地质灾害教育部重点实验室，湖北 宜昌 4430022；2. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；3. 湖南省交通科学研究院，长沙410015 |
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| 基金项目： | 国家自然科学基金项目(No.51009084);中国科学院知识创新工程重要方向项目(No.kzcx2-yw-150);岩土力学与工程国家重点实验室重点项目(No.SKLZ0803);三峡大学人才科研启动基金(No.0620090035);湖南省交通科技项目(No.200544) |
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| 摘 要： | 了解压实红黏土的持水性能是预防路基土体开裂和失稳的基础。首先，利用15 bar压力板仪研究了4种干密度压实试样脱湿路径下的土体持水特征曲线。发现持水曲线随着干密度减小，曲线中间部分呈现水平台阶状，且干密度越小水平台阶的长度越长。然后，结合相同干密度试样的孔隙分布特征曲线，从微观结构的角度分析了压实土体不同持水性能的原因。最后，通过数据拟合的方法建立了不同压实度土体的持水特征曲线方程
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| 关 键 词： | 红黏土 持水性能 孔隙分布 压实 |
| 收稿时间： | 2010-11-18 |
Analysis of water holding capacity and mechanism of compacted laterite soil |
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| TAN Yun-zhi,KONG Ling-wei,GUO Ai-guo,WAN Zhi,ZHANG Hua.Analysis of water holding capacity and mechanism of compacted laterite soil[J].Rock and Soil Mechanics,2011,32(Z1):334-0338. |
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| Authors: | TAN Yun-zhi KONG Ling-wei GUO Ai-guo WAN Zhi ZHANG Hua |
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| Institution: | 1. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang, Hubei 443002, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics,Chinese Academy of Sciences, Wuhan 430071, China; 3. Hunan Communications Research Institute, Changsha 410005, China |
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| Abstract: | It is necessary to understand the water holding capacity of laterite soil, which is the basis of preventing cracking and instability of the soil subgrade. Firstly, soil water characteristic curves (SWCCs) of compacted samples with four different dry densities were investigated by using 15 bar pressure plate apparatus. Test results show that there has appeared a plateau stage in the soil water characteristic curve with the decreasing of dry density. What’s more, the length of the plateau stage is intimately related to the dry density of samples , the lower the dry density is, the longer the length of the plateau stage is. Then, combined with pore distribution curves of the four samples, reasons for their different water holding capacities are investigated from the viewpoint of microstructure. Finally, SWCC equations for soil of different compactnesses are established through data fitting. |
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| Keywords: | laterite soil water-holding capacity pore size distribution compaction |
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