1、No fixed width specification, strong adaptability
2、The construction is convenient and the installation requirements are low
3、In the later stage of construction, it is less affected by the construction on the bridge
4、Reasonable structure, no water, no garbage
6、Easy to repair
7、High comprehensive cost performance
It is to adjust the displacement and connection between superstructure caused by vehicle load and bridge building materials. Once the expansion device of skew bridge is damaged, it will seriously affect the speed, comfort and safety of driving, and even cause traffic safety accidents.