| 大直径超长钻孔灌注桩荷载传递分析 |
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| 引用本文： | 闫静雅,张子新,黄宏伟,龚维明. 大直径超长钻孔灌注桩荷载传递分析[J]. 同济大学学报(自然科学版), 2007, 35(5): 592-596 |
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| 作者姓名： | 闫静雅 张子新 黄宏伟 龚维明 |
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| 作者单位： | 1. 同济大学,岩土及地下工程教育部重点实验室,上海,200092;同济大学,地下建筑与工程系,上海,200092
2. 东南大学,土木工程学院,江苏,南京,210096 |
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| 基金项目： | 上海市"曙光计划" |
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| 摘 要： | 以苏通大桥一期试桩资料为背景，分别考虑三个不同土层以及注浆影响，对大直径超长桩的侧摩阻力及桩端阻力的荷载传递规律进行了拟合分析．分析结果表明，各土层荷载传递特性可通过不同的数学函数进行表达，砂性土极限侧摩阻力可通过直线方程与相应的标贯击数建立联系，注浆对于改善钻孔灌注桩的承载能力有很好的效果．
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| 关 键 词： | 荷载传递 大直径超长钻孔灌注桩 注浆 标贯 |
| 文章编号： | 0253-374X（2007）05-0592-05 |
| 修稿时间： | 2005-09-14 |
Analysis of Load Transfer Behavior of Large Diameter Bored Piles |
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| YAN Jingya,ZHANG Zixin,HUANG Hongwei,GONG Weiming. Analysis of Load Transfer Behavior of Large Diameter Bored Piles[J]. Journal of Tongji University(Natural Science), 2007, 35(5): 592-596 |
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| Authors: | YAN Jingya ZHANG Zixin HUANG Hongwei GONG Weiming |
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| Affiliation: | 1.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering,Tongji University,Shanghai 200092, China; 3. School of Civil Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | In this study,a reliable method of predicting the load deformation is proposed for large diameter bored piles(LDBP) mainly in silty sand stratum based on: data of 1-stage test project of Sutong Bridge;considerations of three different stratums;and the effect of grouting.According to the analysis results,load transfer curves in different profiles can be expressed by different functions(exponential function;hyperbola function;power function);critical shaft resistance of sand can be predicted by the corresponding standard penetration test(SPT) N values;grouting can improve the bearing capacities of bored piles greatly. |
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| Keywords: | load transfer large diameter bored pile post-grouting standard penetration |
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