跨航道海底管道大深度预挖沟技术应用

Technology Application of Deep Buried Pre-Trenching of Submarine Pipelines Crossing Channel

介绍跨航道海底管道大深度预挖沟地质条件调查,包括海底地形调查和地质钻孔调查,船舶选型,包括船舶舱容的选择和耙头的选择,以及施工工艺选择和验收标准等工作。针对采用分层施工法的某个具体工程实例,介绍整体施工流程,重点总结提高施工效率和保证施工质量的方法以及对于存在挖掘难度的区域的处理方法。研究内容可为其他类似工程项目,尤其是采用分层施工法的跨航道海底管道大深度预挖沟项目提供一定的参考。

The geological condition survey,including subsea topographic survey and geological drilling survey,vessel type selection,including the selection of vessel volume and drag head,and construction technology selection and acceptance standards of the deep buried pre-trenching of submarine pipelines crossing channel are introduced.According to a specific project using layered construction method,the overall construction process is introduced.The methods of improving the construction efficiency,ensuring the construction quality and handling the area with excavation difficulty are summarized for reference of other similar projects,especially for the deep buried pre-trenching project of submarine pipelines crossing channel with layered construction method.