300 m级深水导管架分段建造精度控制工法探讨

Discussion on Precision Control Method for Sections Construction of 300 m-Class Deep Water Jacket

深水导管架由于吨位、高度、工作环境等相对于浅水导管架有较大的变化,本文以300 m级导管架建造中其分段建造的尺寸精度控制为案例,阐述了300 m级深水导管架尺寸精度控制在结构分段预制的主要工法,主要包括导管及拉筋接长、花片预制、井口片预制、水平片预制、导管架预制风险点分析及应对措施,并分析探讨深水导管架尺寸控制预制阶段的重点及难点。

The deep water jackets have significant changes in comparison with shallow water jackets because of tonnage,height and working environment.This paper takes the dimensional precision control of segments fabrication in the construction of 300 m deep water jackets as an example to elaborate the main methods for controlling the dimensional accuracy of 300 m deep water jacket in structural segment prefabrication.The main contents include the risk points analysis and countermeasures for the conduits and brace extension,prefabrication of cross panel and wellhead piece prefabrication,horizontal piece prefabrication and jacket prefabrication,and explore the key and difficult points in the prefabrication stage of deepwater jacket size control.