The project is the control project of the fast track of Shenyang East Road (hydrophilic Street - Beijing Tibet Expressway) in the north central area of Yinchuan City, including the SW ramp, the main line bridge between Shenyang Road and Fenghuang North Street, the ne ramp, the main line bridge between Shenyang Road and Zhengyuan street, of which the SW ramp and the ne ramp are all closed steel box girder structures, and the main line bridge between Shenyang Road and Fenghuang North Street and the main line bridge between Shenyang Road and Zhengyuan Street are trough type open steel box girder structures.