
Grupo Olsa is installing 827 foundation piles for a railway line connecting Felipe Ángeles International Airport, near Mexico City, with Pachuca de Soto, approximately 65 kilometres away. The foundation work involves several Liebherr drilling rigs, including the LB 24, LB 25 and LB 28.
Grupo Olsa is using the LB 25, named Mjölnir, to install piles using the Kelly drilling method. The piles extend to depths of up to 33 metres and range from 1.2 to 1.5 metres in diameter. Ground conditions include a basalt layer located between 8 and 20 metres below the surface. The LB 25 has a maximum torque of 252 kilonewton-metres. Grupo Olsa began foundation work in October 2025 and plans to complete its work with the LB 25 in December 2026.

