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

Figure 3

A realization of drilling substitute cable ducts on the bottom side of a U-shaped bridge using a drilling support [21]. The photo shows the use of invented drilling support equipped with a drilling machine with the diamond drilling technology. The drilling machine, clamped into a cart, is led by guiding bars in the required angle (both vertical and horizontal) relative to the bottom face of the structure while drilling a duct.