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一、随着我国石油天然气工业的发展,长距离输油输气管道穿越长江、黄河、嫩江、鸭绿江、嘉陵江、沱江、拉萨河、九龙江、滦河、双台子河等等大中河流约350次,其中油气管道穿越长江黄河的工程竞达20余次。水下油气管道穿越工程的长度计数十公里。近十多年来,我国油气管道河流穿越工程设计施工技术日趋成熟。在不同的河流类型、水文及地质条件下,自行设计施工了裸露于河床上或埋设,平面上呈直线或呈悬链线,单管或管束,复壁管或重混凝土连续复盖层加重稳管等等不同结构型
First, with the development of China’s oil and gas industry, long-distance oil and gas pipelines will cross the Yangtze River, Yellow River, Nenjiang River, Yalu River, Jialing River, Tuo River, Lhasa River, Jiulong River, Luan River and Shuangtaizi River, 350 times, of which oil and gas pipelines across the Yangtze River Yellow River project of more than 20 times. Underwater oil and gas pipelines across the length of the project count ten kilometers. In the past decade or so, the design and construction technology for river-crossing of oil and gas pipelines in China has matured. In different types of rivers, hydrology and geological conditions, the design and construction of their own naked in the riverbed or buried in the plane was a straight line or catenary, single tube or tube bundle, double wall pipe or heavy concrete continuous cover aggravating Tubes and so on different types of structure