摘要
根据国内某风电场的试桩报告,考虑嵌岩桩受到竖向荷载作用下,桩土和桩岩摩阻力不能同时发挥作用,提出桩土摩阻力折减系数,对现有桩基规范中单桩抗拔承载力计算公式进行了修正。采用有限元软件MIDAS建立嵌岩桩单桩基础模型进行静力学仿真模拟,分析了嵌岩桩在竖向荷载作用下的位移和轴力分布特点,确定了桩周土层的摩阻力折减系数的值,并用试桩报告的结果验证了数值模拟结论的准确性。
According to the pile test report of a domestic wind farm,this paper puts forward a reduction coefficient of the pile-soil friction and modifies the calculation formula of the single pile’s uplift bearing capacity in the existing code for pile foundation,considering the factors that the pile-soil and pile-rock friction cannot work at the same time under the vertical load.The finite element software MIDAS is used to establish the single pile foundation model of rock-socketed pile for static simulation.The distribution characteristics of the displacement and axial force under the vertical load are analyzed and the reduction coefficient of the pile-soil friction is determined by results of the numerical simulation.Results of the pile test report verifies the accuracy of the numerical simulation.
作者
范亚宁
卢红前
彭秀芳
吉春明
FAN Yaning;LU Hongqian;PENG Xiufang;JI Chunming(Jiangsu Power Design Institute Co.,Ltd.,China Energy Engineering Group,Nanjing 211102,China)
出处
《武汉大学学报(工学版)》
CAS
CSCD
北大核心
2022年第S01期73-81,共9页
Engineering Journal of Wuhan University
关键词
嵌岩桩
桩土摩阻力折减系数
单桩抗拔承载力
位移
轴力
rock-socketed pile
reduction coefficient of the pile-soil friction
single pile’s uplift bearing capacity
displacement
axial force