| 超厚软土层条件下码头超长摩擦桩分析 |
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| 引用本文： | 刘 毅,万志男,罗 鹏,陈灿鹏.超厚软土层条件下码头超长摩擦桩分析[J].水运工程,2019(4):188-192. |
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| 作者姓名： | 刘 毅 万志男 罗 鹏 陈灿鹏 |
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| 作者单位： | 中交第四航务工程勘察设计院有限公司，广东 广州 510230,中交第四航务工程勘察设计院有限公司，广东 广州 510230,中核霞浦核电有限公司，福建 宁德 355199,天津大学建筑与工程学院，天津 300350 |
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| 摘 要： | 福建霞浦核电厂大件码头拟建位置具有40～50 m的超厚软土层,码头桩基采用的超长摩擦桩的桩-土间相互作用较短桩和中长桩相比更为复杂,很多问题均属设计规范的临界模糊范围。采用有限元法对超长桩在水平和竖向荷载作用下的位移、内力和侧摩阻力进行全面的计算分析,总结超厚软土层中超长摩擦桩的桩身节点水平位移和内力的分布趋势:对于超长摩擦桩,同一土层分层提供侧摩阻力更加合理,且泥面50 m以下的桩侧摩阻力会随着土层深度的增加继续增长,增长速率较50 m以上更快。
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| 关 键 词： | 超厚软土层 超长摩擦桩 有限元分析 |
Analysis of ultra-long friction pile of wharf under condition of ultra-thick soft soil |
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| LIU Yi,WAN Zhi-nan,LUO Peng and CHEN Can-peng.Analysis of ultra-long friction pile of wharf under condition of ultra-thick soft soil[J].Port & Waterway Engineering,2019(4):188-192. |
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| Authors: | LIU Yi WAN Zhi-nan LUO Peng and CHEN Can-peng |
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| Abstract: | The proposed construction site of heavy cargo wharf of Xiapu nuclear power plant in Fujian Province has an ultra-thick soft soil layer of 40~50 m.The pile-soil interaction of ultra-long friction piles used in wharf foundation is more complex than that of short piles and middle long piles,and many problems belong to the critical fuzzy range of the design code.The displacement,internal force and side friction of ultra-long piles under horizontal and vertical loads are calculated and analyzed by finite element method.The distribution trend of horizontal displacement and internal force of ultra-long friction piles in ultra-thick soft soil is summarized.For ultra-long friction piles,it is more reasonable to provide layered side friction for the same soil layer,and the side friction under 50 m mud surface will continue to increase with the depth of soil layer,and the growth rate is faster than that above 50 m. |
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