高桩码头桩群水流阻力近似计算方法

Approximate Computing Method for Piled Wharf Flow Resistance

针对港口建设可行性研究中高桩码头桩群阻力特征基础性研究数据缺乏的问题,引入群桩中单桩的纵向遮蔽影响系数和横向干扰影响系数,提出了桩群阻力计算公式;应用Fluent标准κ-ε紊流模型构建了码头桩群阻水模型,利用数学模型获得了顺水流纵向桩体的遮蔽影响系数、垂直水流横向桩体的干扰系数;同时采用物理模型,在30m×3m×0.26m(长×宽×高)的循环水槽中进行了高桩码头桩群模型试验。结果表明,桩群阻力试验值与计算值相接近,该公式可为实际高桩码头桩群涉水问题的应用研究提供借鉴。

According to imperfection of studying the drag force of water flow around piled wharf during the feasibility study of port construction,a formula for piled wharf flow resistance is proposed by introducing the influence coefficients of single pile in normal and parallel to the water flow.The standardκ-εturbulent flow model in Fluent software is adopted to build the drag force of water flow around piled wharf model,and the influence coefficients of the piles in normal and parallel to the water flow are obtained.At the same time,an experimental work of piled wharf is conducted in a re-circulating flow tank 30m×3 m×0.26 m(length×width×height).The results show that the pile resistance test value is close to the calculated value,and the formula can be helpful to analyze the hydrodynamic problems related to piled wharf.