大型河流穿越挖泥船开挖成型水下管沟

Underwater Ditch Excavation by Dredger in Large River Crossing Engineering

根据大型河流穿越工程新的设计要求，应使输气管线全断面沟埋弹性敷设于河床稳定层内，本文结合长江和嘉陵江穿越工程，对首次采用挖泥船完成大型河流水下管沟开挖成型的施工方法和成功经验予以报道。

Gas transmission pipeline should be buried in total cross section ditch and be layed in elastic status in the stable layer of the river bed based on new design requirement of large river crossing engineering. This paper reports the successfull experience and construction method of underwater ditch excavatin by dredger in large river crossing engineering in Yangtse and Jialingjiang river crossing engineering.