王家滩航道整治方案数学模型研究

为对王家滩河段进行航道整治,针对其河势及滩情,提出2种炸礁方案:炸礁方式为从炸礁基线起向河心侧的礁石炸低至设计底高程,采用1∶1边坡,与原炸礁方案一致,总计炸礁量约为14.04万m³;2级平台采用1∶0.5的边坡自然衔接,从炸礁基线起向河心侧的礁石炸低至设计底高程,近岸炸礁边坡也为1∶0.5,总计炸礁量约为16.81万m³。借助二维数学模型对2种方案进行验证比较。通过分析得出:炸礁方案采用2级阶梯,航道边界30 m以内的部分按照4.2 m水深炸除,其余部分按照3.7 m炸除,可以消除浅水平台不良流态影响。方案实施后,2级平台水深增加了0.5 m,且可供船舶行驶的平台范围增大,3 000 t级船舶可在2级平台上行驶。该方案将目前船舶航行路线右移拉直,拓宽了航槽,大幅改善了船舶航行条件。

Study on Waterway Regulation for Wangjiatan by Mathematical Model

Two reef-blasting schemes are proposed according to Wangjiatan river regime and beach conditions.By using a two-dimensional mathematical model,the two schemes are compared and analyzed.Two-step platform should be adopted in the reef-blasting project.The reef part within 30m of the channel boundary should be blasted until the water depth reaches 4.2m,and the rest blasted to 3.7m so that the undesirable flow patterns affected by shallow water platform could be eliminated.After the implementation of the project,the water depth of the second flat increased by 0.5m,the platform for navigation is widened,and the second platform is accessible for 3 000-ton ship.The ship sailing route moves towards the right and straightens,and the navigation channel is widened,which greatly improves the navigation condition.