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首都国际机场Ⅱ号立交桥,是我国第一座桥上行驶飞机,桥下通行汽车的后张预应力箱型连续梁桥。(见图1)桥位夹角75°03′43″。桥梁载重为综合机型波音747,荷载等级LSN120级,按飞机总重500吨设计。桥长51.96m,桥宽60m。全桥上部结构由10根后张预应力箱型连续梁组成,每根箱梁重310吨,分三段预制,中段梁长20.82m,重130吨,边梁长15.57
Capital International Airport No. 2 overpass, is China’s first bridge on the plane driving the car through the post-tensioned prestressed box continuous beam bridge. (See Figure 1) with a bridge angle of 75 ° 03’43 ". The bridge load is a combined model of Boeing 747 with a load rating of LSN120 and a total length of 500 tons, with a bridge length of 51.96m and a bridge width of 60m. The structure consists of 10 post-tensioned prestressed box-type continuous beams with a weight of 310 tons per box girder, prefabricated in three sections with a length of 20.82m in the middle section and a weight of 130 tons with a length of 15.57