珠海中燃桂山油库多点系泊码头技术改造潮流数学模型研究

利用TK-2D软件,建立了伶仃洋内外整体二维潮流数学模型和桂山岛附近工程区局部二维潮流数学模型,采用最新的水文资料对整体模型和局部模型都进行了验证,在验证的基础上,对珠海中燃桂山油库多点系泊码头技术改造项目的3个平面方案的潮流场进行了模拟,对泥沙回淤和骤淤进行了计算和分析。研究结果表明:工程方案实施后,3个方案的航道涨落潮平均流速变化仅为0.01 m/s,涨落潮平均流向不变。港池(调头地和泊位)开挖后涨落潮流速减小,不需开挖的(方案2的港池和方案3的调头地)则涨落潮流速不变;3个方案港池(泊位、调头地)和航道的平均淤强分别为0.06 m/a、0.02 m/a和0.02 m/a,淤积量分别为4.7万m3/a、1.2万m3/a和1.4万m3/a;工程骤淤问题很小,不致形成骤淤;从潮流场和泥沙淤积角度考虑,以方案2为最优,但考虑到3个方案淤强和淤积量值都不大,因此3个方案都是可行的。

Numerical modeling of tidal current for project of multi-leg mooring wharf in Guishan oil depot

Based on TK-2D software,a whole mathematical model and a local one near Guishan with irregular triangular grid of tidal current in Lingdingyang sea area were set up.Verification and validation were carried out on the basis of measured data.According to the verification, analyses were made on the change of flow field of three plane layout schemes of technical transformation project of multi-leg mooring wharf in Guishan oil depot.The study results show that：the variation of the average tidal current velocity in the channel is only 0.01 m/s after the implement of three schemes, and the average tidal current direction is not changed.The tidal current velocity in the harbor basin is decreased after digging,and it is not changed in the non-dig region.The average siltation intensity in harbor and channel of the three schemes are 0.06 m/a,0.02 m/a and 0.02 m/a,the siltation volume are 0.047 million m^3/a,0.012 million m^3/a and 0.014 million m^3/a.The problem of sudden siltation is very small in this project.The scheme 2 is optimal from the view of the tidal current field and sediment deposition, but considering the little siltation intensity and the small siltation volume, the three schemes are all feasible.