Tunnel shaft “Llano Crucero”, Mexico


OSSA’s team on the Mitla-Tehuantepec Highway, State of Oaxaca, Mexico, achieved the breakthrough of the “Llano Crucero” tunnel, with a total of 142 meters excavated, passing under the village of Llano Crucero with headings between 5 and 17 meters. OSSA executes these works for the operator CICSA, S.A. de C.V.

The entire tunnel was excavated by mechanical means and supported with 0.75 m and 1 m trusses, 300 (20 cm) shotcrete and 200 (10 cm) shotcrete backfill. Of the total meters excavated, 77 meters were excavated under micropile umbrellas.

Congratulations to the whole team!