| 超长钻孔灌注桩竖向承载特征试验研究 |
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| 引用本文： | 张天宝,周良慧.超长钻孔灌注桩竖向承载特征试验研究[J].路基工程,2016,0(3):113-117. |
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| 作者姓名： | 张天宝 周良慧 |
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| 作者单位： | 1.浙江省交通规划设计研究院, 杭州 310006 |
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| 摘 要： | 通过对钻孔灌注桩现场静载试验和桩身应力实测资料的分析,讨论了持力层为卵石、强风化层灌注桩的承载特性和荷载传递机理,研究了桩端阻力、桩侧摩阻力和单桩压缩变形与桩-土的关系。结果表明:桩侧摩阻力和桩端阻力的作用时机存在先后顺序,桩周土摩阻力在极限承载力中占比很大。
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| 关 键 词： | 超长钻孔灌注桩 静载试验 荷载传递 桩侧摩阻力 |
| 收稿时间： | 2019-11-11 |
Experimental Research on Vertical Bearing Characteristics of Super Long Bored Pile |
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| Abstract: | Based on the analysis of measured data for static loading test and pile stress, the bearing characteristics and load transfer mechanism of bored pile in pebble-bearing stratums and strong-weathered rock are discussed. The pile end resistance, pile side friction resistance, compressive deformation of single pile and pile-soil relation are studied. The results show that the action time of pile side friction resistance and pile end resistance is in order. The soil friction resistance surrounding the pile occupies the biggest proportion in the ultimate bearing capacity. |
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