Risk-Based Ventilation Design for a Long Bidirectional Road Tunnel - NAT2024

The Tunnel of Guillermo Gaviria Echeverri, spanning 6.05 miles, will be Latin America’s longest road tunnel, is currently under construction in Colombia’s Antioquia Department with a single bidirectional tube connected to a parallel rescue tube through multiple cross-passages. The study faces challenges in implementing the prescriptive semitransversal ventilation system due to design restrictions. Different ventilation concepts are e􀁛plored to 􀂿nd the most suitable system for regular operation and 􀂿re scenarios. A quantitative ris􀁎 assessment evaluates each alternative system and identi􀂿es the longitudinal ventilation system, accompanied by ris􀁎 mitigation measures, as the safest choice, since it surpasses the prescribed semitransversal ventilation concept.