册镇海底管线沿线海床冲刷原因及冲刷趋势研究

摘要

Seabed erosion may lead to the phenomenon of pipeline hanging in the seawater and make troubles to the security operations of submarine pipeline.By using a tidal current numerical model for Hangzhou Bay and a method for the calculation of seabed erosion and siltation,the cause of the seabed erosion and the erosion trends along the submarine pipeline from Cezi Island to Zhenhai were studied.The research shows that the seabed erosion is mainly caused by the deflecting flow scour effect of Xin-Hongkou reclamation and the water-retardation effect of Jintang Bridge.With the implementation of the reclamation in the near future,part of the seabed along the submarine pipeline will be further eroded.%海床冲刷可能导致海底输油管线裸露悬空,影响其运营安全.文章针对册镇海底输油管线沿线海床的冲刷现象,利用杭州湾大范围海域潮流数学模型和海床冲淤计算方法,分析了造成海床冲刷的原因,预测了冲刷的发展趋势.研究结果表明:册镇海底输油管线沿线海床冲刷主要与新泓口围垦的局部挑流及金塘大桥的阻水作用有关.随着规划围垦工程的实施,沿线部分海床还将进一步冲刷.