In the province of Valle del Cauca in western Colombia, a 32 km long federal road is being built between the towns of Mulaló and Loboguerrero. This new corridor will connect the region to the cities of the province and create a faster route for freight traffic to Buenaventura, Colombia's most important Pacific harbor.
Nine tunnels and 32 bridges
The section runs through steep terrain that is prone to landslides and includes nine 12 km long tunnels as well as 32 bridges. Varying and difficult ground with many fault zones required the use of reliable ground support in the tunnels. For stabilization of the excavation work, DSI Colombia supplied the Type R32-280 hollow bar system. The hollow bars were used cost-effectively as supplementary rock bolts in the area of the tunnel walls to repair unstable sections.
Thanks to the fast, safe and flexible application of the hollow bar system, the work in difficult ground was efficiently completed.