中马友谊大桥浅滩区桩基础承台破碎波荷载数值研究  

Numerical Study of Breaking Wave Impact on Pile⁃cap Foundation in Shoal Area of China⁃Maldives Friendship Bridge

作　　者：刘景红[1] 高宁波 李宁 LIU Jinghong;GAO Ningbo;LI Ning(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei430040,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Beijing100120,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]中交公路长大桥建设国家工程研究中心有限公司,北京100120

出　　处：《施工技术（中英文）》2023年第19期40-45,共6页Construction Technology

基　　金：中国博士后科学基金第61批面上资助(2017M612541)。

摘　　要：针对中马友谊大桥浅滩区桩基础承台结构,采用计算流体力学方法,建立数值波浪水池,以聚焦波近似模拟破碎波,研究桩基础承台(吊箱)结构破碎波荷载。通过研究发现,经典Morison公式低估桩基础破碎波荷载约50%。对于承台(吊箱)结构,可近似采用二维计算模型,当承台位于聚焦波达到最大幅值后翻卷阶段,水平波浪力达到最大值;吊箱下放过程中,未入水时垂向荷载可达到最大值,因而在实际施工过程中需要重点关注入水前破碎波水平与垂向荷载,合理优化入水工艺。Aiming at the pile foundation cap structure in the shoal area of the China-Maldives Friendship Bridge,a numerical wave tank is established by using the computational fluid dynamics method.The focused wave was used to simulate the breaking wave,and the breaking wave load of the pile foundation cap(hanging box)structure was studied.It has been found through research that the classical Morison formula underestimates the breaking wave load of pile foundations by about 50%.For the pile cap(hanging box)structure,the two-dimensional calculation model can be used approximately.When the pile cap is located in the rolling stage after the focused wave reaches its maximum amplitude,the horizontal wave force reaches its maximum value.In the process of lowering the hanging box,the vertical load can reach its maximum value before entering the water.Therefore,in the actual construction process,it is necessary to focus on the horizontal and vertical loads of the breaking wave before entering the water and optimize the water entry process reasonably.

关 键 词：桥梁工程 桩基础 浅滩区 破碎波 流体力学 波浪力 

分 类 号：TU753.3[建筑科学—建筑技术科学]