水道港口2024，Vol.45Issue(3)：339-349,11.
跨海大桥沉井水中沉放流场及水流力模拟研究
Numerical analysis on flow field and current force of caisson in submersion stage
摘要
Abstract
Submersion in water is an important stage of floating caisson construction.To clarify the flow structure around the caisson and current force characteristics during the submersion process is the basic premise of caisson submersion installation.In this paper,embedded caisson of Xihoumen Road-railway Cross-sea Bridge was taken as the research object.By numerical simulation method,the influence of foundation pit on the flow structure was analyzed.The flow pattern around the caisson and the current force under different submersion depths and different inflow rates were studied.The results showed that:influenced by the caisson morphology and foundation pit topography,the three-dimensional flow characteristics are evident;the submersion depth has a significant effect on the vertical flow pattern and turbulence intensity;the flow pattern,relative velocity field distribution and relative turbulence intensity under different inflow rates are relatively consistent;influenced by the wake vortex shedding,the longitudinal and transversal current force on the caisson fluctuates with a certain amplitude,and the mean value has a good positive correlation with the submersion depth and inflow rates;the existence of foundation pit reduces the vertical blocking effect of the caisson and results in a reduction of the current force.关键词
设置沉井/水中沉放/流场特征/水流力/数值模拟/跨海大桥Key words
embedded caisson/submersion/flow structure/current force/numerical simulation/cross-sea bridge分类
交通工程引用本文复制引用
欧阳石,李勇海,杨嘉毅,严冰,欧阳群安,李泽..跨海大桥沉井水中沉放流场及水流力模拟研究[J].水道港口,2024,45(3):339-349,11.基金项目
国家重点研发计划项目(2022YFB2602804) （2022YFB2602804）
中央级公益性科研院所基本科研业务费专项资金项目(TKS20220103) （TKS20220103）
