海上风电超大直径单桩可打性与沉桩疲劳损伤分析  

Drivability and Driving Fatigue Damage Analysis of Super Large Diameter Mono-pile for Offshore Wind Farm

作　　者：马骏 孙肖菲 孙立强 吴伙桂 陈帮 MA Jun;SUN Xiao-fei;SUN Li-qiang;WU Huo-gui;CHEN Bang(Mingyang Smart Energy Group Limited,Zhongshan Guangdong 528400,China)

机构地区：[1]明阳智慧能源集团股份公司,广东中山528400

出　　处：《船海工程》2022年第4期105-109,115,共6页Ship & Ocean Engineering

摘　　要：对某海上风电场大直径单桩基础施工,通过GRLWEAP软件建立沉桩模型,结合土壤参数及实际沉桩每米锤击数与贯入度曲线模拟沉桩过程,模拟结果与实测数据吻合良好,分析超大直径单桩尺寸对可打性和沉桩疲劳损伤的影响,结果表明,相同外径条件下,壁厚的增加对沉桩总锤击数影响较小;相同壁厚条件下,沉桩总锤击数随外径增大而增加。对于沉桩疲劳损伤,其最大值出现在距桩顶0.12 L高程处;当单桩外径或壁厚增大时,沉桩疲劳损伤最大值都有所降低。Taking the construction case of large-diameter mono-pile in an offshore wind farm as research object,a mono-pile driving model was established by software GRLWEAP.The mono-pile driving process was simulated through integrating soil parameters as well as the curve between blow count per meter and penetration.The numerical results agreed with measured data very well.The effect of super-large diameter on the drivability and driving fatigue damage of mono-pile were analyzed.It was shown that the increase in thickness brings little effect on total blow count,with the same diameter of mono-pile;but the total blow count obviously increases as the diameter increased with the same thickness.As for driving fatigue damage,its maximum value occurs at 0.12 L away from the mono-pile top,and the value reduces gradually as diameter or thickness increased.

关 键 词：超大直径单桩 可打性 疲劳损伤 锤击数 

分 类 号：P752[天文地球—海洋科学]