基于API规范的海上大直径钢管桩静压载试验分析
发布时间：2018-10-14 15:02
【摘要】：大直径钢管桩在海洋工程建设中的使用越来越广泛。海上大直径钢管桩试桩周期长、难度大,相关测试数据及研究成果较为少见。本文基于美国石油行业协会API规范,分析了某海上风电大直径钢管桩静压载试验数据,研究了桩侧阻力与桩端阻力随压荷载变化关系。结果表明,对于本文分析的海上大直径钢管桩,其土塞状态一般为不完全闭塞,计算抗压极限承载力时应计入桩管内侧摩阻力;桩侧摩阻力随压荷载增大而逐渐发挥,相同荷载作用下,无黏性土地层侧摩阻力发挥程度较黏性土高;桩端土体破坏分为弹性变形与塑性变形两个阶段,两阶段端阻发挥程度分别可达约50%和80%,当桩端产生0.05d位移时,桩体达到极限平衡状态。
[Abstract]:Large diameter steel pipe piles are widely used in ocean engineering. The test period of large diameter steel pipe pile at sea is long and difficult, and the relevant test data and research results are rare. Based on the API code of American Petroleum Industry Association, the static load test data of a large diameter steel pipe pile in offshore wind power are analyzed, and the relationship between pile side resistance and pile tip resistance with compressive load is studied. The results show that the soil plug state of the large diameter steel pipe pile analyzed in this paper is generally not completely closed, and the internal friction of the pile pipe should be taken into account when calculating the ultimate bearing capacity of the pile, and the friction resistance of the pile side gradually develops with the increase of the compressive load. Under the same load, the exertion degree of lateral friction of non-viscous soil layer is higher than that of clay soil, and the soil failure of pile end is divided into two stages: elastic deformation and plastic deformation, the exertion degree of end resistance in the two stages can reach about 50% and 80% respectively, when the pile end produces 0.05d displacement, The pile reaches the limit equilibrium state.
【作者单位】： 中国电建集团浙江华东建设工程有限公司;中国电建集团华东勘测设计研究院有限公司;
【基金】：中国华能集团公司总部科技项目海上风电场工程建设关键技术研究与应用(HNKJ16-H25-01)资助~~
【分类号】：P75;TU473.1
本文编号：2270823
[Abstract]:Large diameter steel pipe piles are widely used in ocean engineering. The test period of large diameter steel pipe pile at sea is long and difficult, and the relevant test data and research results are rare. Based on the API code of American Petroleum Industry Association, the static load test data of a large diameter steel pipe pile in offshore wind power are analyzed, and the relationship between pile side resistance and pile tip resistance with compressive load is studied. The results show that the soil plug state of the large diameter steel pipe pile analyzed in this paper is generally not completely closed, and the internal friction of the pile pipe should be taken into account when calculating the ultimate bearing capacity of the pile, and the friction resistance of the pile side gradually develops with the increase of the compressive load. Under the same load, the exertion degree of lateral friction of non-viscous soil layer is higher than that of clay soil, and the soil failure of pile end is divided into two stages: elastic deformation and plastic deformation, the exertion degree of end resistance in the two stages can reach about 50% and 80% respectively, when the pile end produces 0.05d displacement, The pile reaches the limit equilibrium state.
【作者单位】： 中国电建集团浙江华东建设工程有限公司;中国电建集团华东勘测设计研究院有限公司;
【基金】：中国华能集团公司总部科技项目海上风电场工程建设关键技术研究与应用(HNKJ16-H25-01)资助~~
【分类号】：P75;TU473.1
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