| 苏通大桥主塔墩基础群桩效应研究 |
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| 引用本文： | 张雄文,董学武,李 镇.苏通大桥主塔墩基础群桩效应研究[J].河海大学学报(自然科学版),2006,34(2):200-203. |
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| 作者姓名： | 张雄文 董学武 李 镇 |
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| 作者单位： | 河海大学土木工程学院,江苏,南京,210098;江苏省苏通大桥建设指挥部,江苏,南通,226010 |
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| 摘 要： | 在苏通大桥主塔墩群桩基础与土体共同作用三维非线性有限元方法分析的基础上,研究了群桩效应对高桩承台底面受力与变形特性、基桩轴力分布、桩侧摩阻力、桩底土附加应力的影响以及桩数变化对群桩效率系数的影响,拟合得出了苏通大桥基桩轴力和群桩效率系数的计算方法.结果表明,在桩径和桩距一定的条件下,群桩效率系数的变化幅度随桩数的增加逐渐减小,并最终趋于定值.
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| 关 键 词： | 苏通大桥 非线性有限元 邓肯-张模型 接触面单元 群桩效应 高桩承台 |
| 文章编号： | 1000-1980（2006）02-0200-04 |
| 收稿时间： | 2004-10-28 |
| 修稿时间： | 2004-10-28 |
Pile group effect of main pylon foundation of Sutong Bridge |
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| ZHANG Xiong-wen,DONG Xue-wu,LI Zhen.Pile group effect of main pylon foundation of Sutong Bridge[J].Journal of Hohai University (Natural Sciences ),2006,34(2):200-203. |
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| Authors: | ZHANG Xiong-wen DONG Xue-wu LI Zhen |
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| Institution: | 1. College of Civil Engieering, Hohai University, Nanjing 210098, China; 2. Jiangsu Provincial Sutong Bridge Construction Commanding Department, Nantong 226010, China |
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| Abstract: | Based on 3D nonlinear FEM analysis of the interaction between pile group foundation of main pylon of the Sutong Bridge and soil,the influences of pile group effect on the stress and deformation of bottom surface of high-rise pile cap,axial force distribution of piles,friction along piles,and additional stress in soil under piles,and the influence of variation of pile number on the coefficient of pile group efficiency were investigated.The calculation methods for axial force of foundation piles and the coefficient of pile group efficiency were obtained by numerical simulation.The result of study shows that,for piles with certain diameter and span,the variation of the coefficient of pile group efficiency decreases as the number of piles increases,and finally reaches a certain value. |
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| Keywords: | Sutong Bridge nonlinear FEM Duncan-Chang model interface element pile group effect high-rise pile cap |
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