Strengthening and Rehabilitation of U-Shaped RC Bridges Using Substitute Cable Ducts

Figure 4

The basic scheme of cable arrangement in the case of strengthening a continuous span bridge by post-tensioning using the substitute cable duct method. Also, it is an example of the usage of multiple phases of post-tensioning. The first phase (on the picture described by red dashed lines) creates a possibility for casting an additional concrete composite slab for slab strengthening. The second phase (on the picture described by blue dashed lines) increases the overall load-bearing capacity of the critical middle span.