沿海液化天然气接收站工程高架式排水方案设计

Design of viaduct drainage scheme for coastal LNG receiving station project

针对目前我国沿海液化天然气接收站海水排水通常采用的海管暗埋方式会破坏现有自然海岸线的问题,提出新型高架式排水方案。开展物理模型试验对高架式排水过程中产生的泡沫问题、排水过程中对排水头内部结构的冲击问题和排水头内部的壅水问题进行研究论证,分析了高架式排水方案中的平面及竖向高程布置和排水管道应力补偿方式。结果表明,采用高架式排水方案是可行的,该方案可避免对现有海岸和海床的开挖,较大程度保护海岸线,减少对海域的影响,在某些对海岸线保护要求高的液化天然气接收站工程中可考虑采用。

In view of the problem that the existing natural coastline will be damaged by the buried sea pipe,a new elevated drainage scheme is proposed.Physical model test is carried out to study and demonstrate the foam problem in the process of overhead drainage,the impact on the internal structure of the drainage head and the backwater problem inside the drainage head.In addition,the plane and vertical elevation layout of the overhead drainage scheme and the stress compensation mode of the drainage pipe are analyzed.The results show that it is feasible to adopt the elevated drainage scheme,which can avoid the excavation of the existing coast and seabed,protect the coastline to a greater extent,and reduce the impact on the sea area.It can be considered in some LNG receiving station projects with high requirements for coastline protection.