| 黄土压实影响因素分析 |
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| 引用本文： | 陈开圣,沙爱民.黄土压实影响因素分析[J].公路交通科技,2009,26(7). |
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| 作者姓名： | 陈开圣 沙爱民 |
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| 作者单位： | 1. 贵州大学土木建筑工程学院,贵州,贵阳,550003;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. 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 |
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| 基金项目： | 交通部西部交通建设科技项目，贵州省社会发展攻关项目，贵州大学引进人才资助项目 |
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| 摘 要： | 针对黄土路基沉陷变形是黄土地区公路的主要病害的现象,通过激光粒度试验、能谱试验、扫描电镜试验、图像处理系统、振动压实试验和标准重型击实试验,从内部因素(黄土的物质组成、显微结构)和外部因素(压实方法、压实功)全面系统地分析了黄土压实的影响因素.研究结果表明,压实黄土的干密度与粒度成分的关系较复杂.具体应用时,要考虑黄土的工程地质分区、黄土的时代等多种因素加以确定;压实并不改变黄土的化学成分;随着压实度的提高,黄土由原来天然状态的粒状、架空、接触结构,逐渐改变为粒状、镶嵌、接触-胶结结构;在推荐参数条件下,黄土振动压实的最佳含水量和最大干密度都略小于室内击实方法确定的最佳含水量和最大干密度;随着压实功能的增加,黄土的最佳含水量减少,最大干容重增加,达到一定程度后,即使继续增加压实功也不会明显降低最佳含水量和增加最大干容重.
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| 关 键 词： | 道路工程 影响因素 压实 黄土 微观结构 |
Study of Influencing Factors of Loess Compaction |
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| CHEN Kaisheng,SHA Aimin.Study of Influencing Factors of Loess Compaction[J].Journal of Highway and Transportation Research and Development,2009,26(7). |
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| Authors: | CHEN Kaisheng SHA Aimin |
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| Institution: | 1.School of Civil and Architecture;Guizhou University;Guiyang Guizhou 550003;China;2.Key Laboratory for Special Area Highway Engineering of Ministry of Education;Chang'an University;Xi'an Shaanxi 710064;China |
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| Abstract: | To cope with the subsidence deformation of loess roadbed which is one of the common highway disasters in loess areas,tests of laser granularity,energy spectrum,SEM,image processing system,vibration compaction and standard heavy hammer compaction were carried out.The influencing factors of loess compaction were analyzed from internal factors such as substance constituent and microstructure to external factors such as compacting means and compaction energy.It is conducted that(1)the relation between dry densi... |
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| Keywords: | road engineering influencing factor compaction loess microstructure |
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