| 颗粒物质对风积沙压实特性影响研究 |
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| 引用本文： | 舒斌,于进庆,刘桂英,官国琳.颗粒物质对风积沙压实特性影响研究[J].工程地质学报(英文版),2010,18(5):692-697. |
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| 作者姓名： | 舒斌 于进庆 刘桂英 官国琳 |
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| 作者单位： | 1.中交第一公路勘察设计研究院有限公司 西安 710075; |
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| 摘 要： | 从颗粒物质的角度探讨了风积沙的压实特性和机理。研究表明,风积沙的重型击实试验曲线呈"双驼峰"形式,表明风积沙具有干压实的特性,水在风积沙的压实过程中扮演着不同的作用;室内振动试验表明振动加速度及振动时间影响着风积沙"巴西坚果效应"与"反巴西坚果效应"之间的转化,从而影响风积沙的振实密度,二者均存在一个产生最大振实干密度的最优值。现场试验通过控制机械参数(振幅A=0.4mm,频率f=48Hz)在压实5遍的时候,可使压实度达到96.8%,CBR值达到25.3,均能满足《公路路基设计规范》要求。
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| 关 键 词： | 颗粒物质 风积沙 压实机理 重型击实 振动压实 |
| 收稿时间： | 2010-04-13 |
COMPACTION CHARACTERISTICS OF AEOLIAN SAND IN LABORATORY AND FIELD FOR ROAD SUBGRADES |
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| SHU Bin YU Jinqing LIU Guiying GUAN Guolin.COMPACTION CHARACTERISTICS OF AEOLIAN SAND IN LABORATORY AND FIELD FOR ROAD SUBGRADES[J].Journal of Engineering Geology,2010,18(5):692-697. |
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| Authors: | SHU Bin YU Jinqing LIU Guiying GUAN Guolin |
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| Institution: | 1.CCCC First Highway Consultants Co., LTD,Xi'an 710075;2.China Institute of Geo-Environment Monitoring, Beijing 100081;3.The Institute of Hydrogeology &|Environmental Geology, AGS,Shijiazhuang 050800 |
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| Abstract: | This paper takes aeolian sand as a kind of granular matter and studies its compaction characteristics in the view of granular material.According to the results of the laboratory compaction tests,a compaction curve is plotted which is quite different from that of clay and looks like a double hump in shape.The two peaks in the curve mean that aeolian sand can be well-compacted whether it is dry or contented some water and water plays different parts in the compaction process.According to the results of vibrat... |
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| Keywords: | Granular matter Aeolian sand Compaction mechanism Weighty tamping Vibration compaction Subgrade Pavement |
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