复杂水流下沉管管节浮运阻力的数值模拟  

Numerical Simulation on Floating Transportation Resistance of Element of Immersed Tunnel under Complex Water Flow Conditions

作　　者：林金雄 吴刚[2] 沈永芳[2] 

机构地区：[1]广州打捞局,广州510260 [2]上海交通大学海洋水下工程科学研究院,上海200231

出　　处：《地下空间与工程学报》2015年第5期1199-1206,1215,共9页Chinese Journal of Underground Space and Engineering

基　　金：上海市自然科学基金(15ZR1423300)

摘　　要：沉管管节的浮运阻力是确定工程施工方案的关键。笔者分析了管节在浮运时的运动及阻力状态,建立了管节浮运的数值分析模型,利用CFD软件STAR-CCM+对佛山沉管隧道管节在不同干舷、航向与不同流速水流作用下的浮运阻力进行了数值模拟分析,探讨了沉管在不同水流环境下浮运的阻力特性。研究表明,建立的数值分析模型适用于复杂水流作用下沉管管节浮运阻力的模拟分析;管节的浮运阻力随流向角的增加而增大;随着浮运速度的增加,管节浮运阻力快速增大;随干舷值增大,管节的浮运阻力减小。本研究成果将为佛山沉管隧道管节的浮运施工提供理论指导。Floating resistance of the element of immersed tunnel is the key to determine the construction program. In this paper,motion and resistance states of the element of immersed tunnel are analysed in tugging,a numerical calculation model of floating transportation for the element of immersed tunnel is established. The numerical simulation of floating transportation resistance for Foshan immersed tunnel with different freeboards,different flow rates and flow directions of water is analyzed using software STAR-CCM＋. The resistance characteristics of element of immersed tunnel are discussed under different water environment conditions. Studies show that established numerical model can be used in floating resistance simulation analysis of element of immersed tunnel under complex water flow conditions. Floating resistance of element of immersed tunnel rises with the increasing of flow angle,and it increases rapidly with floating speed increase. Floating resistance of element of immersed tunnel decreases with the freeboard value increase. The research results will provide a theoretical guidance for floating transportation construction of element of Foshan immersed tunnel.

关 键 词：沉管隧道 浮运 阻力 数值模拟 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]