引用本文:陈灿明,何建新,苏晓栋,王曦鹏,黄卫兰.加翼桩水平承载力计算方法研究[J].水利水运工程学报,2018,(4):1-8
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加翼桩水平承载力计算方法研究
陈灿明1, 何建新1, 苏晓栋1, 王曦鹏2, 黄卫兰1
1.南京水利科学研究院 水利部水科学与水工程重点实验室，江苏南京;2.中国能源建设集团江苏省电力设计院有限公司，江苏南京
摘要:
加翼桩作为海上风电基础的新型结构，目前相关研究甚少。基于ABAQUS三维数值仿真模型，对比分析了海上风电大直径单桩与加翼桩在水平荷载作用下桩身弯矩、应力、位移、泥面处桩基倾斜率、极限承载力以及破坏模式等水平承载性能。研究了大直径单桩和加翼桩桩身与翼板土压力分布，基于计算结果和桩土作用机理，参考现行规范中P-Y曲线模式，对相关系数进行修正，提出软黏土地基大直径单桩P-Y曲线。根据加翼桩翼板面积、形状、刚度和埋深等翼板参数对加翼桩水平承载性能影响的研究成果，提出基于大直径单桩承载力的软黏土地基大直径加翼桩极限承载力经验式和加翼桩翼板参数影响系数的计算式，为加翼桩的研究和运用提供了技术支撑。
关键词:  大直径  加翼桩  翼板参数  P-Y曲线  承载力
DOI：
分类号:TU473
基金项目:国家重点研发计划资助项目（2018YFF0215005）; 南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金资助项目（Y416002，Y418001）
Analysis of calculating method for horizontal bearing capacity of wing-monopile
CHEN Canming1, HE Jianxin1, SU Xiaodong1, WANG Xipeng2, HUANG Weilan1
1.Key Laboratory of Water Science and Engineering, Ministry of Water Resources， Nanjing Hydraulic Research Institute， Nanjing;2.Jiangsu Power Design Institute Co., Ltd. of China Energy Engineering Group, Nanjing
Abstract:
The wing-monopile is a new structure of the offshore wind turbine generator foundation， on which there are few studies. Based on ABAQUS three-dimensional numerical simulation model, the horizontal bearing performances of the large diameter monopile and wing-monopile were analyzed and compared under the conditions of the horizontal loads, including the bending moment, stress, displacement, inclination rates of pile at mud surface, ultimate bearing capacity and failure mode of the pile. Based on the calculation results of soil pressure distribution on the pile and the mechanism of soil-pile interaction, the P-Y curve of the large-diameter monopile in soft clay foundation was developed by referring to the P-Y curve model in the current specification, and the correlation coefficient was corrected. According to the research results of the influences of the area, shape, stiffness and buried depth of the wing plate on the horizontal bearing capacity of the wing-monopile，the empirical formula and the calculation formulas of the correlation coefficients of the ultimate bearing capacity of the large diameter wing-monopile in soft clay foundation are presented by referring to the specifications for the bearing capacity of the large diameter monopile, which can provide a technical support for the research and application of the wing-monopile in the marine environment.
Key words:  large diameter  wing monopile  wing plate parameters  P Y curve  bearing capacity
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