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国内在建的兰成-中贵油气管道工程第三标段多处管道采用双管同隧道敷设。基于保证施工安全和缩短工期的需要,探讨了油气管道共用隧道敷设施工中需要注意的问题和解决措施,提出了主要工序的技术难点和施工建议。施工措施包括:采用轨道和龙门架辅助运布管,保证双管同步焊接,合理规划较大坡度隧道内管道的焊接和回填次序,协调各道工序的连续进行,确保作业人员安全等;主要工序包括:隧道内运管和布管,焊接,检测与返修,管道就位与回填,管道试压与洞口封堵。
Lan Cheng in the country under construction - the third section of the middle-grade oil and gas pipeline project with multiple pipelines with double tunnels laying. Based on the need of ensuring the construction safety and shortening the construction period, the problems and solutions needed to be paid attention to in the construction of the shared tunnel for oil and gas pipelines are discussed, and the technical difficulties and construction suggestions of the main process are proposed. Construction measures include: the use of rail and gantry to assist in the delivery of pipe to ensure simultaneous welding of double pipe, the rational planning of large slope tunnel welding and backfill sequence, to coordinate the continuous operation of various processes to ensure the safety of workers, etc .; The main process Including: tunnel transport and pipe, welding, testing and rework, pipe in place and backfill, pipeline pressure test and hole sealing.