摘要
工程实践中碎石桩常因缺乏足够的侧向约束力导致其应用效果不佳,复合地基沉降难以得到有效控制。为解决普通碎石桩应用效果不佳的问题,基于ABAQUS有限元数值软件建立土工合成材料约束桩复合地基模型,研究不同桩体长径比、桩体模量、土工合成材料强度等因素对承载特性的影响。结果表明,土工合成材料可以有效地为碎石桩提供侧向约束并提高复合地基承载力。研究结果有助于深入认识土工合成材料约束桩加固地基机理,为相关工程施工提供参考。
Local scour is prone to occur around offshore wind turbine pile foundation.The solidified soil protection has widely used in the field of subgrade treatment,bridge pier protection,etc.,and the pilot research is gradually carried out in offshore wind turbine projects.Based on an offshore wind power project in a sand ridge sea area in the eastern part of Jiangsu Province,the numerical simulations are carried out by using Flow-3D to establish the models of offshore wind turbine monopile foundation under constant flow.Comparing with classical tests and empirical formulas,simulation results demonstrate that the model of offshore wind turbine monopile foundation without solidified soil protection can accurately simulate the flow field and predict the maximum scour depth.Also,there is a good agreement between the simulation results of monopile foundation model protected by solidified soil and the scanning pictures around the monopile.By comparing the retention rates and the maximum scour depths of solidified soil,the optimum protection radius of solidified soil is considered as 2 times of the pile diameter.Solidified soil protection is less effective in protecting the seabed where the flow velocity is over 4 m/s,which verifies that the solidified soil is generally designed to resist scouring by flow velocity of 4 m/s in practical engineering construction.
作者
葛安定
曹晓航
GE An-ding;CAO Xiao-hang(CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China;Tianjin Port Engineering Institute Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering of Tianjin,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering,Ministry of Transport,Tianjin 300222,China)
出处
《中国港湾建设》
2024年第8期33-38,共6页
China Harbour Engineering
关键词
约束碎石桩
土工合成材料
数值模拟
承载特性
offshore wind turbine
monopile foundation
scour
solidified soil protection
numerical simulation
