| Viaduct as a large municipal facility in the city, space under the bridge has a variety of use of modes. Use of space research under the viaduct at the same time, found that the viaduct there is the possibility of the role of the protection of historic landscapes. Tanghe Nanquan site protection designed to protect Nanquan sites no alternative but adopt the viaduct across the way on a good solution to the confrontation between urban development and the protection of historic landscapes. The successful application of the viaduct to protect historic landscapes not only widened the bridge space use patterns, but also provides a new feasible solution for the protection of historic landscapes. |