Uso de los materiales meri resultantes de las excavaciones de los túneles del tramo 3 de la concesión vial Bogotá - Villavicencio

Abstract

In this work a geological study was carried out to identify the MERI-T materials (Material resulting from excavation for tunnel construction) extracted from the tunnels of the Bogotá - Villavicencio Road in section 3, Chirajara - Fundadores sector, concessioned by Coviandina S.A.S., which was awarded the development, administration and operation of this section. This study was carried out to determine the geological characteristics of the extracted material and to have more knowledge about it and subsequently optimize the use of such material in construction projects near the extraction area, either as aggregates for concrete, subbase material, pavements or construction of the superstructure, among others. The materials are normally deposited in a Zodme zone (Zone of deposition of excavated materials), which requires large storage areas and then no other management is given to these wastes. The lithostratigraphic unit to which the MERI-T materials belong was identified in order to have detailed information on the specific geological characteristics of the rocks, detailing their mineralogical composition, structure and geological origin. A geological mapping of the tunnel excavation area was then carried out to obtain geological and tectonic structures, active faults and geological problems of the rock mass. Subsequently, a series of laboratory tests were carried out to determine the mechanical properties of the rocks, which are fundamental to evaluate the strength, durability and capacity to withstand cyclic loads. The results of these studies will provide crucial information to understand the behavior of the rock in real conditions of use and will facilitate decision making in engineering and construction applications where this material is used.