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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。
The sinking resistance of sink pipe joints is the key to determine the construction plan. The author analyzes the movement and resistance state of pipe joint during floating, and establishes the numerical analysis model of pipe joint floating transportation. Using the CFD software STAR-CCM +, it analyzes the effects of pipe joint of Foshan immersed pipe tunnel on different freeboard, Under the float resistance of the numerical simulation analysis of immersed pipe in the different water flow resistance of the floating environment. The results show that the established numerical analysis model is suitable for the simulation analysis of the floating resistance of the sink pipe section under complex water flow. The resistance of the pipe section increases with the increase of the flow angle. With the increase of the floating speed, Float resistance rapidly increases; as the freeboard value increases, the float resistance of the pipe joints decreases. The results of this study will provide theoretical guidance for the construction of the floating pipe tunnel in Foshan.