The newly built oil terminal in a certain port is an offshore type,which adopts the method of a cross-channel buried subsea pipelines,connected to the shore,and the subsea pipeline needs to be protected by backfilled protection overlay.Based on the DNV series specifications,the up-heave buckling,settlement,anti-floating,and impact energy absorption of the pipeline were analyzed,and the thickness,composition and backfill parameters of the protection overlay were determined,to ensure that the pipeline is not damaged during construction and the in-place situation is stable during operation.The construction technology comparison,detail construction method and implementation effect of the protection overlay of the subsea pipeline were described.The practice proves that the design of the subsea pipeline protection overlay is reasonable and the selected construction method is suitable,which can be used as reference for similar projects.
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维普
