引言随着我国油、气管道建设的发展,在管道建设中常常遇到河流、沼泽、湖泊、山谷等自然障碍物或人工构筑物,不得不采用穿越或跨越形式敷设。但常常由于河床不稳定,河床或边坡冲刷严重,开挖管沟十分困难或不经济等原因,而采用空中跨越要比水下穿越更为合理。管道跨越大江大河,施工复杂,技术难度大,国外大跨度管桥大都采用悬索管桥 Introduction With the development of oil and gas pipelines in our country, we often encounter natural obstacles such as rivers, swamps, lakes and valleys or man-made structures in the construction of pipelines and have to adopt crossing or spanning forms. However, it is often more reasonable to adopt airborne strides than to cross underwater because of instability in the riverbed, serious erosion in the riverbed or slope, difficult or uneconomical excavation of the trench. Pipelines across the river, the construction is complex, technical difficulties, most of the long-span pipe bridge suspension bridge