Construcción de túneles carreteros en terrenos difíciles de la cordillera oriental de Colombia - doble calzada carretera Bogotá-Villavicencio - tercio medio El Tablón - Chirajara

Abstract

In the following thesis project, for each one of the 18 tunnels of the dual-carriageway scheme between Bogotá-Villavicencio in its middle third, concerning the towns called “El Tablón” (K34+100) in the municipality of Caqueza and “Chirajara Ravine” (K63+100), all of them in the Department of Cundinamarca in Colombia, it describes, in a general way, the different studies carried out and the designs accomplished as a result of these studies, during the pre-construction stage and through the follow-up achieved in the labour during the stage of construction, the constructive aspects and situations in unfavourable zones already seen in the tunnels that are exposed. Among them, the modifications of portal designs, instabilities and collapses of slopes in portals and in the underground excavations, the difference between the estimated land and the ground yields achieved according to the quality of the land really excavated. Also, the solutions that were determined to correct each one of structure problems and the results economically talking.