| GFRP管桩与钢管桩的承载性能模型试验研究 |
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| 引用本文： | 邓仑昆,旷枭雄,杨果林,魏赛赛.GFRP管桩与钢管桩的承载性能模型试验研究[J].路基工程,2017,0(6):63-66. |
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| 作者姓名： | 邓仑昆 旷枭雄 杨果林 魏赛赛 |
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| 作者单位： | 1.中建五局土木工程有限公司, 长沙 410075 |
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| 基金项目： | 国家自然科学基金项目（51278499，51478484）；中建五局土木工程有限公司项目:软弱围岩浅埋偏压双连拱隧道力学行为分析与施工技术研究（02012016YN77） |
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| 摘 要： | 为掌握GFRP管桩的竖向承载性能，进行了泥炭质土条件下GFRP管桩静载荷模型试验研究，对桩侧摩阻力和端阻力分布进行分析。结果表明:GFRP管桩的极限承载力较同等尺寸的钢管桩稍大，同时桩顶沉降也稍大；由于GFRP管桩桩身较大的压缩变形量使得桩身下部桩土相对位移较小，相应的侧摩阻力得不到充分发挥；GFRP管桩的端阻力基本可以忽略不计，不宜作为端承桩使用；GFRP管桩作为承重桩使用的关键是减小桩身压缩变形量。
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| 关 键 词： | 模型试验 竖向承载性能 GFRP管桩 桩侧摩阻力 桩端阻力 |
| 收稿时间： | 2019-11-06 |
Model Test Research of Bearing Capacity of GFRP Pipe Pile and Steel Pile |
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| Abstract: | To grasp the vertical bearing capacity of GFRP pipe pile, we perform static load model test of GFRP pipe piles in peat soil and analyze their pile shaft resistance and tip resistance. The results show: GFRP pipe pile surpasses steel pipe pile with the same dimensions in the ultimate bearing capacity but also in the settlement of pile top. Because the GFRP pipe pile has a too large compressive deformation along pile, the displacement between pile and surrounding soil is so small that the pile shaft resistance could not exert itself effectively. The tip resistance of GFRP pipe pile is so small that we can ignore it, so it is inappropriate to design GFRP pile as end bearing pile. The key to use GFRP pipe pile as bearing pile is to reduce the value of compressive deformation. |
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