海上风电钢管桩自平衡法现场试验研究

Static load study on in-situ steel pipe pile for offshore wind farm using self-balancing method

一种新型钢管桩预装荷载箱法被研发出用于自平衡法海上风电钢管桩基检测试验,并通过现场自平衡试验研究探究了海上打入桩桩基础特性。该方法首次成功应用于海外某海上风电场直径1.4 m的超长大直径钢管桩承载力检测,用于探究其承载特性和桩侧桩端阻力发挥规律。现场试验显示,该新型检测方法达到了预期的测试效果和经济效益,与现有钢管桩自平衡法相比,对土的影响更小,可靠度更高,为类似土层和直径的超长钢管桩承载力试验提供了新的途径。

Based on the self-balancing method,a newly innovated load cell was developed to obtain the bearing capacity of steel pipe pile for offshore wind farm,and the characteristics of offshore driven pile foundation were studied through in-situ self-balancing test.This method was successfully applied for the first time to detect the bearing capacity of ultra-long and large-diameter steel pipe piles with a diameter of 1.4 m in an offshore wind farm to explore the bearing characteristics and the law of shaft resistance and tip resistance of pile.The in-situ tests show that the new method is effective and economic to examine the design parameters for a pile.Compared with the existing self-balancing method of steel pipe pile,it has less influence on soil and higher reliability.It provides a new way for the bearing capacity test of ultra-long steel pipe pile with similar soil layer and diameter.