A. Guang Shan flyover (structure type: truss pedestrian bridge).
Product description.
With the development of the city, the footbridge has become an important traffic facility for people to cross the street and the road. At the same time, the footbridge also represents and reflects the image of a city, and is a landscape of the city due to its different shapes. Due to the widening of the road, the span of the footbridge is getting wider and wider, and the landscape requirement is getting higher and higher, the steel truss footbridge is widely used in the urban footbridge because of its light structure and large spanning capacity.
A. Structural characteristics
The main deck of the footbridge is “one” layout, a steel truss structure, and 4 ladders on both sides of the footbridge, the ladders adopt a steel box beam structure, the main bridge, and the ladders adopt a bored pile foundation, pier span is 60m, the clearance of the motorway under the footbridge is not less than 5m, the clearance of the non-motorway is not less than 3.5m, the crowd load is The main bridge girder and diagonal web structure of the flyover is designed as welded rectangular closed section, rectangular closed section not only has good landscape effect but also has a good internal anticorrosion effect. The bridge body is fully welded, structural steel is used Q345qC steel plate, and the main bridge elevation and horizontal webs are triangular layouts, used to stabilize the support of the bridge body. The nodes are in the form of fully welded integral node plates, which are welded to the adjacent chords in the factory to form a whole, and the adjacent chords are welded together in the field, and the webs are spliced in the nodes, which minimizes the workload of pre-assembly in the field and has a strong effect on the later anti-corrosion.
B. Advantages
1. Design concept: The main bridge adopts an under-bearing steel truss structure to shorten the height of pedestrians on the bridge and improve the utilization rate of the flyover.
2. In order to balance and coordinate the factors, the steel truss chords and webs of the main bridge are connected by a “triangle wave”.
3. Advanced technology, manufacturing process, and new materials are adopted: the steel truss of the main bridge adopts a closed section and all-welded structure, the truss chords, and webs adopt an integral nodal plate structure, “integral nodal plate” is technologically advanced, easy to construct and better stress, which greatly reduces the workload of pre-assembly at the construction site, and at the same time, each member is more efficient. The sealing between the trusses and the webs is good, which is powerful for the later anticorrosion and reduces the later maintenance and repair cost of the bridge.
4. The steel truss structure has strong spanning ability and gives full play to the excellent mechanical properties of the rod material, which greatly saves engineering materials and reflects the effect of landscape.