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天然气、石油输送管道是国民经济的能源大动脉，确保其安全平稳输供是非常重要的。管道穿越大中型江河的安全可靠性更是管网安全运行的关键。因此，管道穿越江河工程采用安全可靠、技术先进、方便施工和维护管理且费用低的设计方案，直接关系到管道部门及经营管理部门和技术经济效益，应成为企业经营管理中不可忽视的问题，介绍了输气管道穿、跨越的优缺点及实用范围，详细对比了无沟裸露敷设、有沟埋设敷设、无沟埋设敷设和隧道明显

A COMPARISON AMONG THE PLANS OF PIPELINE CROSSING OVER LARGE-MEDIUM RIVER

Gas and oil transmission pipeline is the main artery of energy source of national economy and it is very important to ensure a smooth and steady transmission and feeder.The safety of pipeline crossing over large medium rivers is the key to the safe running of the pipe network,therefore,to adopt the safe,advanced ,easy to operate and manage and low cost design plan for the construction of pipeline crossing over river is directly relating to the technical and economic benefits of pipeline construction department and pipeline management department,becoming a non negligible problem in the business management and administration.In this paper,the advantages,shortcomings and applying limits of gas pipeline crossing and aerial crossing are introduced and the four types of pipe laying,i.e.bare pipe laying without trench,pipe laying by burying in trench,pipe laying by burying without trench and open pipe laying in tunnel,are compared in detail,and it is shown that the open pipe laying in tunnel is the optimum design plan with the best technical and economic benefits in pipeline crossing over large medium rivers.