Detail of bridge railing (concrete, steel, marble)

2. Design load: urban class A, crowd load 3.5kN/m 7. The upper part of this bridge is 27.6m prestressed or reinforced concrete hollow slab, the bridge deck is continuous, the lower pier is column pier, and the bored pile foundation is used; The abutment adopts gravity L-abutment expansion foundation. 8. The structural layer between the new bridge and the old bridge is disconnected, and a 2cm wide longitudinal joint is reserved, and the bridge deck is continuous. 9. One SSFB-D80 expansion joint is set at 0 # abutment, 3 # pier and 6 # abutment respectively. 10. Design flood frequency: 1/100. 11. Geological conditions: the riverbed section is covered with 1.5-4.2m thick pebble layer, 8-11.3 thick strongly weathered granite layer, and the following is slightly weathered granite layer; The allowable bearing capacity of the foundation is 400kpa. 　　

2. Design load: steam - level 20, hanging - 120; The crowd is 3.5KN/m2. 3. Bridge deck motorway: two-way four lane; Design clearance of motorway under the bridge: 4m. 4. The main structure of the bridge adopts prestressed concrete continuous monolithic slab, partially prestressed concrete Class A members, and longitudinal and transverse two-way prestressed system. 5. Cylindrical piers are used as piers, gravity abutment is used as abutment, and rigid expanded foundation is used as abutment foundation. 6. The bridge foundation shall be constructed by open excavation, and the superstructure shall be constructed by integral cast-in-situ support and one-time frame dropping. 　　

2. The upper part of this bridge adopts 1 × 10m prestressed concrete hollow slab, and the lower abutment adopts double column abutment and pile foundation. 3. The design load is Class II highway, and the seismic peak acceleration is 0.2g. 4. The bridge deck transverse slope of 1.5% is formed by the bridge deck pavement thickness of 100~153mm, and the bridge deck pavement is made of C40W6 concrete. 5. One GQF-C20 expansion joint is set at the abutment of this bridge, and GYZ175 × 42mm plate rubber bearings are used at the abutment, 24 in total. 6. The channel slope and bottom of the bridge are protected and built within 15m of the bridge, upstream and downstream respectively, using 400mmM7.5 mortar rubble+300mm gravel cushion.