岳欢欢1，霍凯成2

(1 武汉理工大学华夏学院，武汉 430070； 2 武汉理工大设计研究院， 武汉 430070)

［摘要］结合宁波某港口大桥大直径钢管桩抗拔静载荷试验，对试桩的荷载-位移曲线、位移-时间曲线、桩身轴力及单位侧摩阻力分布曲线进行了分析，揭示了钢管桩的抗拔受力机理。分析表明抗拔桩为纯摩擦桩。针对在试验中未能确定抗拔极限承载力的情况，采用MATLAB软件中的双曲线模型拟合实测荷载-位移曲线,预测试桩的抗拔极限承载力,对该地区桩基的钢管桩抗拔设计有一定的指导意义。

［关键词］大直径钢管桩； 抗拔静载荷试验； 荷载-位移曲线； 侧摩阻力； 极限承载力

中图分类号： TU473    文献标识码： A    文章编号： 1002-848X(2015)S2-0225-03

Study on uplift static load test of large-diameter steel pipe pile

Yue Huanhuan1, Huo Kaicheng2

(1 Huaxia College，Wuhan University of Technology， Wuhan 430070, China;

2 The Design & Research Institute of Wuhan University of Technology, Wuhan 430070, China)

Abstract: Combined with the uplift static load test of large-diameter steel pipe pile in the Port bridge of Ningbo, the load-displacement curve, displacement-time curve, axial force distribution curve and unit shaft resistance were analyzed, which revealing the uplift characteristic of the steel pipe pile. The analyses show that the uplift steel pipe pile is pure friction pile. Moreover, the hyperbolic model in MATLAB software was used to fit the measured load-displacement curve, predict ultimate bearing capacity of the test pile, which has some guiding significance to the design of steel uplift pile in the region.

Keywords: large-diameter steel pipe pile; uplift static load test; load-displacement curve; shaft resistance； ultimate bearing capacity

作者简介：岳欢欢，硕士研究生,Email：63975871@qq.com。