In today’s era of rapid economic development, with the rapid progress of urbanization, the urban population is constantly increasing, and cars have become an indispensable means of transportation, which brings huge challenges to urban transportation. Ordinary urban roads cannot meet the traffic of an increasing number of vehicles. Especially during rush hours and holidays, we can clearly feel the troubles caused by traffic congestion. The overpass is to alleviate the problem of traffic congestion. The overpass refers to a modern bridge with upper and lower layers, multi-directional driving, and non-interference established at important traffic intersections in the city.
The biggest role of the overpass is to use the method of spatial isolation to eliminate the conflict of road plane intersection traffic, so that the straight vehicles on the two intersecting roads are unobstructed, and the plane road is three-dimensional, thereby accommodating more traffic. We can think about the role of the pedestrian overpass. In fact, the role of the overpass is similar to that of the pedestrian overpass. The emergence of the overpass has greatly improved traffic efficiency, alleviated the problem of traffic congestion, improved road safety, and greatly improved the mobility of urban traffic. It is an indispensable traffic structure for modern urban traffic.
Of course, the construction of overpasses is generally concrete structure, and now the steel structure and concrete composite structure overpass and steel structure overpass are more widespread. Due to the limitation of urban space, the construction of highways is more difficult, but the application of steel structure can make the construction process more convenient. Compared with traditional concrete structure, steel structure overpass has the following advantages:
- The steel structure is relatively light, which can reduce the load of the overpass on the ground, and at the same time reduce the cost of the foundation, making the construction cost of the overpass more economical. And the maintenance cost is low, and its aesthetics has won wide recognition.
- The steel structure has good seismic resistance and weather resistance. The steel structure overpass is suitable for various complex terrains and climatic conditions, which can meet the needs of different bridge construction, increase the service life of the overpass, and reduce safety hazards.
- Plasticity and detachability: The steel structure can meet different component shapes, and they are all processed in the factory and assembled on site. The steel structure components are light, and the transportation and construction are relatively convenient, and the construction period is short and the delivery is fast. No construction waste is generated, which is beneficial to environmental protection. Even if it does not meet the traffic demand after many years and needs to be renovated and demolished, it is relatively simple and convenient, and can be recycled and reused to achieve resource circulation.
The advantages of steel structure overpass are self-evident. It not only improves the construction efficiency and economy of the bridge, but also enhances the seismic resistance and adaptability of the bridge. It is an ideal overpass building material.