漂浮式风电锚桩锤击过程桩身弹性吸能分析及选锤  

Analysis of elastic energy absorption of pile shaft during driving of anchor piles for floating wind turbines and selection of piling hammer

作　　者：陆红 王婷婷[1] 洪亮 林登 LU Hong;WANG Ting-ting;HONG Liang;LIN Deng(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou,Guangdong 510230,China;Zhejiang Yongan Machinery Co.,Ltd.,Wenzhou,Zhejiang 325204,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230 [2]浙江永安工程机械有限公司,浙江温州325204

出　　处：《中国港湾建设》2023年第5期30-34,104,共6页China Harbour Engineering

摘　　要：漂浮式风电锚桩一般位于水域较深的海区,可在水面上进行锤击沉桩作业。但按传统选锤估算公式及锤击力学模型进行可打性分析选锤,常发生锤击能量偏小,沉桩效率偏低,贯入度趋于零的拒锤现象。文中应用桩身弹性原理为基础的动力打桩锤击力学模型分析方法,通过桩身的弹簧刚度解析,导出了在锤击力作用下,桩身弹性压缩变形量及吸能值,修正了选锤能量级别。为配接长送桩器的风电锚桩、入土较深的长桩及薄壁桩的沉桩施工,获得了更加贴近实际锤击工况的选锤能量级别。Anchor piles for floating wind turbines are generally located in sea areas with great water depth and can be installed with piling hammer at sea.But,if a piling hammer is analyzed and selected according to the conventional assessment equations for hammer selection and the dynamic model for pile driving,it often occurs that the hammer strike energy is often small,the pile driving efficiency is low,and the penetration degree tends to be zero.The analysis method based on the principle of pile shaft elasticity,through the analysis of the spring stiffness of the pile shaf,is used to derive the elastic compression deformation and energy absorption values of a pile under the action of the hammer force,and correct the energy level of selected hammers.The energy level of selected hammers closer to the actual hammering conditions is obtained for the installation of anchor piles with a long pile feeder for wind turbines,long piles and thin-wall piles.

关 键 词：浮式风电 锚桩 桩身弹性 弹簧刚度 吸能 

分 类 号：U655.55[交通运输工程—港口、海岸及近海工程]