通过盐城市污水厂尾水深海排放工程实践,介绍了大口径聚乙烯塑料管道在海洋工程中的应用。重点介绍了该工程的施工过程,包括塑料管道的热熔焊接及牵引入海,管道配重设计,沟槽开挖方式,管道的敷设,管段海上浮运、安装、沉放,稳管及回填等内容。最后还将应用大口径聚乙烯塑料管道与传统管道的工程造价进行了比较。 Through the practice of Yancheng Sewage Plant deepwater tailwater discharge engineering, the application of large diameter polyethylene plastic pipe in marine engineering is introduced. The construction process of the project is mainly introduced, including the hot-melt welding of plastic pipe and its introduction into the sea, the design of pipe weight, the way of trench excavation, the laying of pipelines, the floatation of pipelines at sea, installation, sinking, stabilization and backfilling content. Finally, the application of large-diameter polyethylene plastic pipe with the traditional pipeline project cost were compared.