基于FLAC^3D 的海上风电大直径钢管桩基础竖向承载力数值模拟研究  

Numerical Simulation on Vertical Bearing Capacity of Offshore Wind Power Large-diameter Steel Pipe Pile Foundation Based on FLAC^3D

作　　者：骆光杰 周茂强 张强 沈晓雷 詹懿德 沈佳轶[3] LUO Guangjie;ZHOU Maoqiang;ZHANG Qiang;SHEN Xiaolei;ZHAN Yide;SHEN Jiayi(PowerChina Huadong Engineering Co.,Ltd.,Hangzhou 311122,Zhejiang,China;PowerChina Zhejiang Huadong Engineering Consulting Co.,Ltd.,Hangzhou 311122,Zhejiang,China;Zhejiang University,Hangzhou 310015,Zhejiang,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]浙江华东工程咨询有限公司,浙江杭州311122 [3]浙江大学,浙江杭州310015

出　　处：《水力发电》2021年第1期117-121,共5页Water Power

摘　　要：为研究不同深度地层的大直径钢管桩基础承载性能,采用FLAC^3D建立大直径钢管桩数值模型,开展数值模拟研究。结果表明:数值模拟所得桩极限承载力为10450 kN,与现场静载试桩试验结果相近,数值模型可靠;桩身轴力随着土层深度的增加而减小,桩的轴向承载力主要由桩侧摩阻力提供,桩底轴力趋近于0;当桩入土深度大于30 m时,桩极限承载力提升较快,说明土层⑥-1可作为良好的持力层。研究成果可为岸外辐射沙洲海域海上风电施工建设提供参考依据。In order to study the bearing capacity of large-diameter steel pipe pile foundation at different depths,the FLAC^3D is used to establish the large-diameter steel pipe pile numerical model and carry out numerical simulation research.The results show that,(a)the ultimate bearing capacity of the pile obtained by numerical simulation is 10450 kN,which is similar to the results of on-site static load test and proves the reliability of numerical model;(b)the axial bearing capacity of pile which is mainly provided by pile lateral friction decreases with the increase of soil depth,and the axial force in pile bottom is close to 0;and(c)when the pile is buried deeper than 30 m,the ultimate bearing capacity of the pile is increasing rapidly,indicating that the soil layer⑥-1 can be used as a good bearing layer.The research results can provide references for the construction of offshore wind power in the radial sandbar.

关 键 词：海上风电 大直径钢管桩 竖向承载特性 FLAC^3D 

分 类 号：TU473.11[建筑科学—结构工程]