The reinforced retaining wall of the roadbed of Yiba section of Shanghai-Chengdu Expressway with a hight of 51.5 meters.
▎Yichang to Badong Expressway Bridge Reconstruction Project.
The project is located between Miaowan No. 1 and No. 2 tunnels. The original plan was for bridge erection. Because the bridge was between the four tunnels, the tunnel spoil was excavated on the inner side in the early stage and could not be transported out. After backfilling on site, it was difficult to excavate the piers with a thicker overburden. In the later period, the spoil ground of the four tunnels was 6KM away. , The transportation distance is far and the spoil ground needs to be requisitioned. The overall cost is high, and it is better to digest and discard waste on the spot. However, if the natural slope is adopted, the maximum height is as high as 51.5m, and the foot of the natural slope will block the river.