摘要
导管架桩基沉桩及打桩过程中遇到软弱土层会发生溜桩现象,导致桩周土体重塑,侧摩阻力降低,从而影响桩基稳定性。因此,开展考虑溜桩效应的导管架基础承载特性研究对于海上风电工程安全至关重要。以东海某风电场为工程背景,采用理论计算和数值模拟相结合的方法,分析溜桩效应对导管架基础承载特性的影响规律,得到以下结论:沉桩过程中发生溜桩,深度为19.6 m;打桩过程中发生溜桩,深度为19.0 m;溜桩对上拔桩和下压桩的承载特性影响差别不大;侧摩阻力折减系数对导管架桩基挠度影响显著,最大增幅达到309.1%;对导管架桩基弯矩影响相对较小,最大增幅为57.6%。
When encountering soft soil layers during the process of pile sinking and driving of jacket pile foundation,the phenomenon of pile sliding may occur,leading to the reshaping of the soil around the pile and the reduction of lateral friction,thereby affecting the stability of pile foundation.Therefore,the research on the bearing characteristics of jacket foundations considering the sliding pile effect is crucial for the safety of offshore wind power engineering.This article takes a wind farm in the East China Sea as the engineering background,and a combination of theoretical calculation and numerical simulation is used to analyze the influence of pile sliding effect on the bearing characteristics of jacket foundation.The following conclusions are drawn:(a)the pile sliding occurs at a depth of 19.6 meters during pile sinking,and the pile sliding occurs at a depth of 19.0 meters during pile driving process;(b)the influence of sliding piles on the bearing characteristics of pull-out piles and compression piles is not significantly different;and(c)the reduction coefficient of lateral friction has a significant impact on the deflection of the jacket pile foundation with a maximum increase of 309.1%,and the impact on the bending moment of the jacket pile foundation is relatively smaller with a maximum increase of 57.6%.
作者
黄昱
马博
许海波
徐明华
梁英杰
沈佳轶
HUANG Yu;MA Bo;XU Haibo;XU Minghua;LIANG Yingjie;SHEN Jiayi(PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;Zhejiang East China Engineering Consulting Co.,Ltd.,Hangzhou 311122,Zhejiang,China;Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China;Hainan Institute,Zhejiang University,Sanya 572025,Hainan,China)
出处
《水力发电》
CAS
2025年第1期101-106,共6页
Water Power
基金
浙江省联合重点基金资助项目(LHZ22E090002)
中国电建集团华东勘测设计研究院有限公司科技项目(KY2020-ZX-19)。
关键词
溜桩
导管架桩基
侧摩阻力
承载特性
SACS模拟
sliding pile
jacket pile foundation
lateral friction resistance
load bearing characteristics
SACS simulation
