Innovative Practice in Project Management of Large-diameter and Large-wall Thick-ness Pipelines in Water Network Area
In complex water network areas,the construction of large-diameter and large-wall-thick-ness pipelines is a highly challenging project.Due to the poor bearing capacity of the foundation,the large number of welding layers(passes),and the difficulty of sinking pipes into the trench,traditional construction methods are often difficult to cope with.In order to solve these problems,taking the ex-ample of the Nantong-Luzhi Section of the China-Russia Gas Pipeline East Line Project(Yongqing-Shanghai)as an example,through the innovative practice of a series of key construction techniques such as cleaning and pipe laying construction of the work zone,fully automatic welding construction,strict control of the thickness of the blunt edge in groove processing,control of the gap between pipe open-ings,optimization of welding parameters,inspection of welding joints after layer(pass)welding is com-pleted.Addition of moisture-proof measures,sand flushing and pipe sinking of the pipe-jacking cross-ing section,and dragging back of the floating pipe,sinking pipes into trenches,a set of construction technology measures suitable for large-diameter and large-wall thickness pipelines in water network ar-eas has formed.The smooth construction of large-diameter and large-wall thickness pipeline projects in water network areas is promoted,and it provides project management experience and reference for sim-ilar pipeline construction in the future.
water network arealong-distance pipelinepipeline constructionlarge-diameter and large-wall-thickness pipelinefully automatic welding
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