| 压实黄土的湿陷性与微观结构的关系 |
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| 引用本文： | 沙爱民,陈开圣.压实黄土的湿陷性与微观结构的关系[J].长安大学学报(自然科学版),2006,26(4):1-4. |
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| 作者姓名： | 沙爱民 陈开圣 |
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| 作者单位： | [1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]贵州大学土木与建筑工程学院,贵州贵阳550003 |
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| 基金项目： | 国家西部交通建设科技项目 |
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| 摘 要： | 由于黄土特殊的工程性质和内部结构的复杂性，黄土地区高等级公路出现了一些湿陷破坏事故。采用扫描电镜、图像处理系统和能谱仪，对压实黄土在湿陷前后的孔隙特征、化学组成等微观结构进行研究，得出压实黄土的湿陷性与微观结构的关系。结果表明：大、中孔隙含量是黄土产生湿陷的主要原因，其与黄土湿陷系数具有定量关系，湿陷后黄土的主要化学元素含量发生了变化。
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| 关 键 词： | 道路工程 黄土 压实 微观结构 湿陷性 扫描电镜 |
| 文章编号： | 1671-8879（2006）04-0001-04 |
| 收稿时间： | 2005-06-14 |
| 修稿时间： | 2005年6月14日 |
Relationship between collapsibility and microstructure of compacted loess |
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| SHA Ai-min, CHEN Kai-sheng.Relationship between collapsibility and microstructure of compacted loess[J].JOurnal of Chang’an University:Natural Science Edition,2006,26(4):1-4. |
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| Authors: | SHA Ai-min CHEN Kai-sheng |
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| Abstract: | The loess has special engineering properties, its internal structure is very complex. So the high-grade roads in loess are happen to be destroyed due to the collapsibility. The loess microstructure is studied with the instruments of scanning electron microscope, energy spectrometer and image analysis system to reveal the void characteristics and chemical element components in the compacted loess. The relationship between collapsibility and microstructure of compacted loess can be obtained. The results show that the contents of big and middle voids are the key parameters to discribe the loess callapsibility, there is a quantitative relation between collapsibility coefficients and the contents of big and middle voids. When the loess is collapsed, the contents of main chemical elements is also changed. 5 tabs, 5 figs, 9 refs. |
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| Keywords: | road engineering loess compaction microstructure collapsibility scanning electron microscope |
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