J what are the construction materials and history of Jinan Bayi overpass?

The overpass was built in Xuantong for three years (19 1 1). The overpass has three floors and is the first large overpass in Jinan. 1973 rebuilt the overpass, and 1975 rebuilt and opened to traffic again. At present, the length of the bridge is about 1000m, and the width of the bridge deck is18.1m. It is a two-way four-lane 10-hole hyperbolic arch bridge.

2. Reconstruction plan:

According to the plan, tianqiao district plans to rebuild the flyover this year. At present, the renovation project has been included in this year's urban planning of tianqiao district, and two design schemes have been released, which are waiting for the demonstration and approval of relevant departments.

According to the first plan, both sides of the bridge will be widened in an all-round way, from the current four lanes to eight lanes, and a magnificent bridge will be rebuilt. Another scheme is to keep the old bridge, on the basis of rebuilding and strengthening the bridge body, keep the east side motionless, and build a new two-way four-lane sister bridge with the same width on the west side to connect with the old bridge.