The Optimized Design And Constructional Discussing Of The Prefabricated Spelling In Succession Structure

Spliced precast ,pre-stressed concrete multi-span frame bridges are entire in structure reasonable in mechanics and brief in modeling Equilateral section spliced girder bridges can be mechanical constructed,shop-fabricated. They can eliminate costly false work and mould board. Little traffic would be interfered. They are very fit to build the cross-over bridges in our country.In this paper, the writer adopts the optimization criteria to study some problems about three span rigid-frame bridge used as the cross-over .They are about: reasonable arrangement of the girder, suitable angle of the V pier. A preliminary research on construction is carried out.