Steel structure hoisting scheme of pedestrian landscape bridge project
The proposed pedestrian landscape bridge is located in the central area of * * County, across the * * River, from the intersection of Yanjiang Road and Qiming Road in the west to Linyuan Road of Tianyue Square in the east. The west bank of the bridge site is the old city, and the main roads are Minjian Road, Yanjiang Road, Qiming Road, as well as large residential areas and the scenic belt along the river under construction. Hongyuan City developer projects are under construction on the west side; The east bank is the new urban area of the county seat, and a large cultural square - Tianyue Square and a large residential area have been built. The main bridge of pedestrian landscape bridge is a 136+69m half through steel structure arch bridge, with a width of 6m at the middle span and 8m at both ends. The longitudinal spacing of slings is 5m. The main girder is a steel box girder structure with a height of 1.4m; The suspender adopts extruded steel strand, and the upper and lower anchorage adopts ear plate structure. The arch bridge of this bridge has a large span and a narrow bridge width. The main beam is suspended on the main arch by slings. The main beam is connected with the arch rib transverse brace and abutment by setting supports, which is a semi floating system. A transverse damper is set in the middle of the bridge span. The steel box girder is a single box and single room thin-walled structure composed of deck top plate, bottom plate, web, diaphragm, etc. Q345D is used as the main material. The standard steel box girder is 5m long in longitudinal direction and 6m wide in transverse deck in standard section. The steel box girder is 1.4m high, the top plate is 14mm thick, the bottom plate is 12mm thick, and the web plate is 12mm thick. The top, bottom and web plates are stiffened with straight ribs. The spacing of ordinary diaphragms in standard section is 2.5m, and the thickness is 16mm. According to the requirements of manufacturing, transportation and installation, the steel box girders of the whole bridge are divided into three types, the standard beam width is 6m, and the beam width at the side support arch rib and abutment is 8m,. The beam segments are connected by welds. The main beam and suspender shall be anchored by ear plate.
