Fanjiagou Bridge is located at K9+309, G244 National Road , Baoji City, Shaanxi Province. It is a skew bridge with a skew angle of 30.93° and 28.87° on both sides of the abutment. The superstructure is a prestressed concrete hollow slab has a span of 13m and a bridge width of 13m. The bridge deck pavement consist of 9cm asphalt concrete, ATR-1 waterproof layer and 10cm C40 concrete. Both sides of the bridge are provided with rigid anti-collision railings. Grade flat approach slab with a length of 5m are arranged at both ends of the bridge. The bridge is a semi-integral skew bridge, the end of the main girder is set with a block to prevent falling girder. The end girder on the abutment is rigidly connected to the main girder, and the lower part of the abutment is connected to the superstructure through the bearing, thus eliminating the expansion joint and deck expansion device at the abutment, avoiding the maintenance and repair of the deck expansion device, and improving the usability and durability of the bridge. At the same time, because the main girders are connected to the abutments through the bearings, neither bending moment nor shear force is transferred, making the additional forces on the bridge caused by temperature changes, concrete shrinkage creep and settlement differences of piers and abutments smaller compared to the integral bridge. Drainage pipes are installed in the lower part of the end girders to facilitate drainage, and foam filler is installed between the end girders and the wingwalls to accommodate the deformation of the main girders and to prevent water from eroding the main girders.
The Fanjiagou Bridge was constructed by Baoji Highway Administration and designed by Xi'an Highway Research Institute. The School of Civil Engineering of Fuzhou University is responsible for the scientific research project with the bridge as the background, and has guided the design of the bridge and carried out research on the bridge structure. The bridge was completed and opened to traffic in July 2018.
Fig.1-Side view of bridge 1
Fig.2-Side view of bridge 2