| 基于荷载传递法的CFG桩复合地基沉降计算 |
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| 引用本文： | 赵明华,何腊平,张玲.基于荷载传递法的CFG桩复合地基沉降计算[J].岩土力学,2010,31(3):839-844. |
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| 作者姓名： | 赵明华 何腊平 张玲 |
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| 作者单位： | 湖南大学 岩土工程研究所，长沙 410082 |
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| 基金项目： | 国家863计划资助项目，湖南省研究生创新基金 |
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| 摘 要： | 深入分析了CFG桩复合地基的荷载传递机制，针对CFG桩复合地基中桩、土、垫层相互作用特点，基于荷载传递法，通过简化桩土单元体竖向相对位移分布模式，引入弹塑性荷载传递模型，并考虑桩体的上刺与下刺变形，建立出CFG桩复合地基沉降计算的基本微分方程，进而提出了一种新的能考虑桩-土-垫层体系共同作用的复合地基沉降计算方法。采用该沉降计算方法对某试验进行分析，其结果表明，沉降计算值与实测值吻合较好，且该方法计算工作量小，便于工程应用。
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| 关 键 词： | CFG桩 复合地基 沉降 荷载传递法 |
| 收稿时间： | 2008-07-23 |
Settlement calculation of CFG pile composite foundation based on load transfer method |
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| ZHAO Ming-hua,HE La-ping,ZHANG Ling.Settlement calculation of CFG pile composite foundation based on load transfer method[J].Rock and Soil Mechanics,2010,31(3):839-844. |
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| Authors: | ZHAO Ming-hua HE La-ping ZHANG Ling |
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| Institution: | Institute of Geotechnical Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | With thoroughly analyzing the load transfer mechanism of CFG pile composite foundation, considering the characteristics of the interaction among pile, soil and bedding course, according to the assumption and the simplified distribution mode about the vertical displacement of pile-soil element, an elastoplastic load transfer model is introduced; and considering both upward and downward penetration displacements of piles, an basic differential equation of settlement calculation of CFG pile composite foundation is established based on load transfer method. Then, a new method for calculating the settlement of CFG pile composite foundation is developed. This new method is applied to analyzing an experiment; and the results show that the calculated results are consistent with the real values. This method can decrease the cost of calculation and can be conveniently applied to the practical engineering. |
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| Keywords: | CFG pile composite foundation settlement load transfer method |
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