| 上海软土地区超长桩竖向承载特性试验研究 |
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| 引用本文： | 陈伟. 上海软土地区超长桩竖向承载特性试验研究[J]. 地下空间与工程学报, 2011, 7(3): 504-508 |
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| 作者姓名： | 陈伟 |
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| 作者单位： | 1.上海陆家嘴金融贸易区联合发展有限公司,上海 200127;2.上海陆家嘴金融贸易区开发股份有限公司,上海 200127 |
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| 基金项目： | 上海市科技攻关计划重点项目资助(09231200900;10231200500) |
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| 摘 要： | 根据上海地区某工程超长灌注桩的现场静载荷试验和桩身应力测试结果,分析该地区超长灌注桩的竖向承载特性。实测结果表明,两根试桩的桩端阻力与桩顶荷载之比约为10%,超长桩的竖向承载力主要由桩侧摩阻力来提供的。通过对桩身轴力和侧阻分布曲线的分析,发现超长灌注桩侧摩阻力的发挥与桩顶荷载、桩周土性质等因素密切相关,而成孔质量在满足规范要求后对土体侧摩阻力发挥影响并不显著。根据桩身侧阻分布特点,建议在工程设计时应充分利用深层的密实粉砂层来提高桩身竖向承载力,研究结论可供同类地区的超长桩设计和理论分析提供参考。
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| 关 键 词： | 超长灌注桩 承载性状 侧摩阻力 土层类别 成孔质量 |
| 收稿时间： | 2011-01-19 |
Experimental Study on the Vertical Bearing Capacity of Super-long Bored Pile in Shanghai Soft Soil Area |
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| Chen Wei. Experimental Study on the Vertical Bearing Capacity of Super-long Bored Pile in Shanghai Soft Soil Area[J]. Chinese Journal of Underground Space and Engineering, 2011, 7(3): 504-508 |
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| Authors: | Chen Wei |
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| Affiliation: | 1.Shanghai Lujiazui Finance and Trade Zone United Development Co., Ltd., 200127, Shanghai, China; 2.Shanghai Lujiazui Finance and Trade Zone Development Co., Ltd., 200127, Shanghai, China |
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| Abstract: | According to the static load test and stress measurement along the super-long bored piles in Shanghai soft soil area,the bearing capacity of super-long piles is studied.The measurement results show that the ratio of tip resistance to the pile top load is about 10% and the bearing capacity of super-long pile is mainly provided by the friction resistance of pile.From the axial force and friction resistance distribution along the pile shaft,the lateral friction of super-long bored pile is closely related to th... |
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| Keywords: | super-long bored pile bearing capacity friction resistance soil types bore holing quality |
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