考虑泥沙骤淤影响的航道通航标准研究

Study on Navigable Channel Standard by Considering Sudden Siltation

结合我国几个典型粉沙质海岸航道工程设计的应用实例,提出在确定粉沙质海岸上泥沙淤积较严重航道的通航标准时,需考虑泥沙骤淤影响的观点:即应在一般航道作业标准的基础上,考虑航道可能发生某种程度泥沙骤淤的情况,综合确定航道通航的最大船舶吨级标准。该标准可作为确定航道整治建筑物尺度、强淤积区备淤深度等参数,确定防沙堤口门位置和验算航道通过能力等的依据。本研究提出了该标准确定的原则与方法,可为类似工程提供参考。

By combining with the project examples of typical silt-sandy-beach channels in China,it is proposed that the impact of sudden siltation should be taken into consideration before ascertaining the navigable standard for the silt-sandy-beach channel with comparatively severe siltation.Except for the navigation operating standard for normal channel,it should be considered and ascertained the maximum ship-tonnage level comprehensively when a certain extent of sudden siltation occurs in the channel.The above standard can be used as a basis for ascertaining the dimensions of the renovated marine structures,the surplus siltation depth in the high-siltation area,the position of the sand barrier entrance and checking the navigable channel capacity.The principal and method to ascertain the navigable channel standard is proposed,which will provide the reference for the similar projects.