Abstract：Research purposes:The bridge ofQinghai-Tibet Railway for crossing the Lhasa-Gongga Highway is located on the curvewith the large bevel angle of the rail and highway and wide road surface, so it can notmeet the requirements of clearwidth of grade separation to us 32 m span simply-supported beam to cross the highway. If the bridge pier is built in themiddle of the highway, itnotonly occupies the road bounds, butalso affects the permeability of the highway vision because the bridge is located on the main highway to Lhasa, demanding beautiful landscape. Therefore, it is necessary to design a bridge that can meet the requirements of clearance for grade separation and coordinationwith the surrounding landscape.
Research conclusions:The continuous structure of the pre-stressed concrete continuous beam and steel pipe arch has the characteristicsof largerspan, lowerheigh,t the perfectstructure performance and easy construction. Thispapergives an introduction to the design and construction of this bridge.
2009, Vol. 26 
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