| 高速公路CFG桩复合地基褥垫层作用机理研究 |
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| 引用本文： | 何结兵,洪宝宁,丘国锋.高速公路CFG桩复合地基褥垫层作用机理研究[J].岩土力学,2004,25(10):1663-1666. |
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| 作者姓名： | 何结兵 洪宝宁 丘国锋 |
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| 作者单位： | 1.扬州大学 水利科学与工程学院，江苏 扬州，225009；2.河海大学 岩土工程研究所，江苏 南京210098； 3.广东省长大公路工程有限公司，广东 番禺511430 |
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| 摘 要： | CFG桩 (cement fly-ash gravel pile) 复合地基的核心技术是设置褥垫层，而褥垫层设计的是否合理，对CFG桩复合地基的承载与变形特性都产生较大的影响。根据太沙基基本理论，详细地讨论了CFG桩复合地基褥垫层作用机理，并推导出CFG桩复合地基最佳桩间距、合理褥垫层厚度、桩土应力比、实际置换率的解析表达式。计算结果与工程实例对比表明了该解答的可行性，能够为CFG桩复合地基的优化设计提供帮助与指导。
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| 关 键 词： | CFG桩 复合地基 褥垫层 高速公路 |
| 文章编号： | 1000-7598-(2004)010-1663-04 |
| 收稿时间： | 2003-07-16 |
| 修稿时间： | 2003年7月16日 |
Research on cushion action mechanism of CFG pilecomposite foundation for expressway |
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| HE Jie-bing,HONG Bao-ning,QIU Guo-feng.Research on cushion action mechanism of CFG pilecomposite foundation for expressway[J].Rock and Soil Mechanics,2004,25(10):1663-1666. |
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| Authors: | HE Jie-bing HONG Bao-ning QIU Guo-feng |
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| Institution: | 1.College of Hydvaulic Science and Engineering, Yangzhou University,Yangzhou 225009, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 3. Guangdong Changda Highway Engineering Co.Ltd.,Panyu 514430, China |
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| Abstract: | The core technique of CFG-pile (cement fly-ash gravel pile) composite foundation is the setting of cushion, of which the rationality will greatly affect the foundation carrying capacity and distortion characteristic. Based on Terzaghis consolidation theory the mechanism of cushion for CFG-pile composite foundation is discussed in detail; and on this way the optimum space between piles, the thickness of cushion, the pile-soil stress ratio and the actual ratio of replacement are deduced. Compared to engineering example , these solutions are quite accurate so as to actually instruct the design of CFG-pile composite foundation. |
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| Keywords: | cement fly-ash gravel pile composite foundation cushion expressway |
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