| 三维复合模型及其在散体桩复合地基分析中的应用 |
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| 引用本文： | 徐洋,谢康和,何丽波,许国平.三维复合模型及其在散体桩复合地基分析中的应用[J].岩石力学与工程学报,2004,23(20):3405-3412. |
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| 作者姓名： | 徐洋 谢康和 何丽波 许国平 |
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| 作者单位： | 1. 宁波市建筑设计研究院,宁波,315012
2. 浙江大学岩土工程研究所,杭州,310027 |
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| 摘 要： | 在假定复合地基桩土问竖向和切向变形协调以及应力平衡的基础上，用有效应力分析法建立了三维复合有限元模型。并令复合有限元模型的平均固结度等于单桩轴对称复合地基的平均固结度，从而反算出其在线性加荷情况下的渗透系数，把得到的渗透系数代入三维复合有限元模型中就可用于固结变形分析。算例分析表明，无论复合地基中的桩体是否打穿软土层，该方法都具有较好的计算精度，该方法较适用于对散体桩复合地基的固结分析。
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| 关 键 词： | 土力学 复合地基 三维有限元 复合模型 固结 |
| 文章编号： | 1000-6915(2004)20-3405-08 |
| 收稿时间： | 2003-5-30 |
| 修稿时间： | 2003-7-10 |
ESTABLISHMENT OF THREE DIMENSIONAL COMPOSITE MODEL AND ITS APPLICATION TO COMPOSITE FOUNDATION WITH GRANULAR PILES |
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| Xu Yang,Xie Kanghe,He Libo,Xu Guoping.ESTABLISHMENT OF THREE DIMENSIONAL COMPOSITE MODEL AND ITS APPLICATION TO COMPOSITE FOUNDATION WITH GRANULAR PILES[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(20):3405-3412. |
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| Authors: | Xu Yang Xie Kanghe He Libo Xu Guoping |
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| Affiliation: | Xu Yang1,Xie Kanghe2,He Libo1,Xu Guoping1 |
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| Abstract: | On the basis of assuming deformation consistence and stress equilibrium at the interface between piles and soil in composite foundation,three dimensional composite FEM model is established by effective stress analysis method in this paper. By assuming that the average consolidation degree in the model is equal to that in composite foundation,the permeability of the model is back calculated and the procedure of consolidation analysis for composite foundation is programmed at the same time. Numerical examples show that the proposed method is of good accuracy no matter whether piles in composite foundation penetrate subsoil or not,and is suitable for consolidation analysis of composite foundation with granular piles. |
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| Keywords: | soil mechanics composite foundation three dimensional FEM composite model consolidation |
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