1. China's current high-speed rail construction is in full swing. In addition, the terrain in the central and western regions is relatively complicated, with many canyons and rivers. A large number of bridges need to be built during the process of railway construction. The aluminum alloy bridge has a relatively broad potential market due to its advantages such as convenient transportation and light weight.

2. Steel generally has problems of rust and poor low temperature performance. The rust of steel will seriously affect the robustness of the bridge, not only bring greater maintenance costs, but also serious safety risks. The poor low temperature performance will prevent the steel bridge from being used normally in some severe climatic conditions. And aluminum alloy materials generally have relatively strong corrosion resistance and low temperature performance, so they can be widely used in a variety of climatic conditions and durable. Although the cost of aluminum alloy bridges is generally high, low maintenance costs in the later stage may reduce the price gap to a certain extent.
3. Research on aluminum bridge decks at home and abroad has been very mature and widely used. The continuously improved level of material research and development also provides a technical guarantee for the development of new alloys that meet different performance requirements. In recent years, domestic aluminum manufacturers have gradually set their sights on the field of industrial aluminum profiles. Technically, it provides the foundation for the construction of aluminum alloy bridges.
4. Metros in full construction in major cities in China have very strict requirements for pressure from the ground. Due to the huge advantages of aluminum alloy bridges, it is foreseeable that more aluminum alloy pedestrian bridges and highway bridges will be designed and used in the future.