Hefei Taihu Road Pedestrian Overpass Main Bridge
Pedestrian bridges are also known as pedestrian overpasses. Generally constructed in the traffic flow, pedestrian densely populated areas, or intersections, squares and railroads above. Pedestrian overcrossing only allows pedestrians to pass through, used to avoid traffic and pedestrian traffic plane intersection when the conflict, to ensure that people cross safely, improve speed, reduce traffic accidents.
According to the structural distinction, common overpasses can be divided into three major categories, namely, suspended structure, supporting structure and hybrid structure.
Suspended structure of the overpass to the bridge railing as the main load-bearing components for pedestrians to pass through the bridge itself is not load-bearing, hanging as a load-bearing beam on the bridge railing, this structure of the overpass will be structural components and practical components are combined together, can reduce the use of construction materials, relatively reduce the cost of the project, but the structure of the overpass bridge railings unusually thick and sturdy, and thus pedestrians in the bridge on the view of the railings will be blocked, and the thick bridge railings are difficult to give a person a sense of beauty. Will be blocked by the railing, and the thick bridge railing is difficult to give a person the feeling of beauty, so in the urban landscape function is lacking.
Supporting the structure of the overpass will be load-bearing bridge directly erected on the piers for pedestrians to walk on the bridge above the bridge, and the bridge railing only play a role in protecting pedestrians, and not load-bearing, this type of overpass cost is relatively high, but due to the bridge railing is slender and beautiful, as the function of the cityscape is better, and thus the number of cities in the number of this type of overpass is the most crowded.
The hybrid structure of the overpass is a hybrid of the above two structures, the bridge railing and the bridge together as a load-bearing structure to share the load of the bridge.
Construction Process Introduction:
The superstructure of the main bridge of Taihu Road Pedestrian Overpass adopts the form of ring closure. The main pier adopts the form of a column directly supporting the main beam, and the column diameter is 920mm; The pier of the stairway adopts the type of a column directly supporting the runway beam, and the column diameter is 630mm. The superstructure of all overpasses adopts steel structure box girder, the main bridge section presents an arc shape, and the stairway section adopts rectangular box girder. High quality requirements, complex manufacturing processes, large engineering span, and great arc bending difficulty. Unique shape. The piers of the main and stairway are circular steel structure columns with column diameters of 920mm and 630mm. Only three companies in China have production capacity, which can be called "the first overpass in East China". The gross tonnage is 1046.3 tons (excluding handrails)
