Mincivil, contractor of the project together with Topco S.A., is using deep foundation machines from Liebherr to install the piles for the bridges. Piles with diameters of 1500 mm down to depths of 26 m were made by the drilling rig LB 36 using the Kelly drilling method, and piles with diameters of 600 mm and depths of 33 m were made by the piling and drilling rig LRB 355 using full displacement drilling equipment. By the end of the work the Columbian company had drilled a total of 57,000 m into the deep. While the LB 36 completed its work in December 2017, the LRB 355 will be operating until March 2019.
The deep foundation specialists from Mincivil are located in Cundinamarca, Antioquia and Boyacá. Daniel Rodriguez is Foundation Unit Business Manager. He is at a construction phase in Mosquera, nearly an hour by car from Bogotá, and explains that the soil is so hard there due to the nearby mountains. “These are difficult conditions and a real challenge for the machine.” In order to work efficiently under such conditions the choice of drilling machine plays a decisive role. With a glance at the LRB 355 Daniel indicates which solution he found for this problem.