The design and application of door type framework subway bridge structure

This paper discussed the structure analysis and the design features of a new type bridge structure named door type framework subway bridge, and also analyzed the applicable conditions of this bridge type in the design of the mountainous area highway, combined with JiangHuang highway K69 + 142 frame bridge. Door type framework subway bridge has the advantages of reasonable force, applicable economy, and comfortable use. In the selection of the small aperture span bridge plans of the high filled roadbed highway in mountainous areas, if the geological conditions are good and there are large quantity dug earthwork, the door type framework subway bridge plan is the best choice. Both the technology, economy and environmental protection, and the improving driving comfort, reducing the operation period maintenance workload, it has obvious competitive advantage and widely promotion prospects.