📋 Tender Overview
Increasingly safer tunnels equipped with high-tech equipment for monitoring and systems that allow greater efficiency in mobility are built and are at the service of 4G projects in charge of the National Infrastructure Agency ANI.Thanks to the Fourth Generation 4G projects Colombia has been making significant progress in the construction of these structures that offer advantages such as overcoming geographic accidents reducing environmental impact the stability of civil works in the face of catastrophes and the user safety.This is how these tunnels are equipped with ventilation equipment lighting systems communications fire detection and extinction electrical substations closed circuit television and traffic signal and signaling systems tools that are coordinated from a command center And control.When a fire occurs the operator identifies the specific zone and activates the ventilation system one hundred percent. In our case there are three fire zones that depending on the location and the ventilation semi-transversal operate in their different modes. There are also fire mitigation control and extinction teams explained engineer Jos Fernando Flrez Duque Director of Tunnel Operation for the Autopista al Mar 1 project a project that connects Medelln with major commercial exchange centers such as the Costa Caribbean the Pacific Coast and the Magdalena River.Another component of these structures are the exhaust tunnels which are tubes parallel to the main tunnel for evacuation of people or cars in case of fire flood or obstruction among otheremergencies.These galleries can be pedestrian or vehicular. Depending on its use it is the area with which they are built. These are small underground tunnels that connect the main tunnel with another auxiliary tunnel explained the Engineer.Western tunnelAn example of this design is the second tube of the West Tunnel of the Autopista al Mar 1 project. With a length of 4.6 kilometers. This tunnel will have nine service galleries three vehicular and six pedestrian which will connect to the existing tunnel.The second tube of the Western Tunnel will have longitudinal ventilation and will be unidirectional.Currently this work has an excavation progress of approximately 75. The cale total excavation is expected to be in October 2020.The Vice President of Contractual Management of ANI Luis Eduardo Gutirrez highlighted the capabilities and the high level of engineering that is being implemented in the construction of these important projects.These structures imply a great engineering capacity since they are high impact works that require the articulation of different areas within the project. The national geography means that when building tunnels engineers face multiple challenges.However the great challenge that this implies we are advancing in the construction of important works to continue connecting the country and developing sustainable infrastructure economically socially and environmentally said the Vice President of Contract Management. Tunnels in numbersThe 4G program of the National Infrastructure Agency contemplates the construction of 53 tunnels of which 19 are already underway and 15 will be re-profiling.These are the tunnels in 4GHighway to the Sea 1 1 tunnelsHighway to the Sea 2 17 tunnelsPacific Connection Highway 1 4 tunnelsPacific Connection Highway 2 2 tunnelsPacific Connection Highway 3 2 tunnelsVas del Nus 2 tunnelsBucaramanga - Yond 2 tunnels IP Chirajara - Founders 6 tunnelsGirardot - Ibagu - Cajamarca 6 tunnelsPamplona - Ccuta 2 tunnelsBogot - Girardot 4 tunnels Mulal - Loboguerrero 5 tunnelsTransversal del Sisga 15 tunnels for re-profiling On average the tunnels are operated by 21 people in eight-hour shifts seven days a week 24 hours a day.
