海上风机加翼桩基础水平承载性能分析

Analysis for Horizontal Bearing Capacity of Wing Pile Foundation of Offshore Wind Turbine

利用有限元软件分析加翼桩水平承载规律。在此基础上讨论了翼片长度、宽度以及埋深对其水平承载能力的影响;从提高水平承载性能和节约用钢量两个角度共同考虑,改进了翼片效率指标公式,利用该公式优化翼片尺寸;研究了水平荷载加载高度、方向以及竖向荷载对加翼桩水平承载力的影响规律。结果表明:翼片尺寸和埋深是影响加翼桩水平承载性能的关键因素;矩形翼片最优宽度为0.6倍桩径、最优长度为4倍桩径;荷载作用高度增加会降低加翼桩水平承载力;45°方向水平荷载作用下,加翼桩水平极限承载力最小;均质粘土地基中,竖向荷载的存在会影响加翼桩水平承载性能的发挥。

Finite element software was used to analyze the horizontal bearing rule of wingpile.Furthermore,discussion was carried out for the effects of the length,width and buried depth of wing plate on the bearing capacity of wing pile.The formula of wing plate efficiency index was improved from the aspect of increased horizontal bearing performance and less steel consumption.The formula was used to optimize the size of wind plate,studythe rule for the effects of horizontal load height,direction and vertical load on the horizontal bearing capacity of wingpile.The results show that the size and buried depth of the wing plate are the key factors that affect the horizontal bearing capacity of the wingpile.The optimum width and length of rectangular wing plate are 0.6 and 4 times pile diameter respectively.The horizontal bearing capacity decreases with the increase of load height.The load at a 45°angle leads to the minimum horizontal ultimate bearing capacity of wingpile.Based on homogeneous clay foundation,the existing vertical load may limit the horizontal bearing capacity of wingpile.