Mapa de microzonificación geotécnico en subsuelo de la parroquia de Calderón, Distrito Metropolitano de Quito, a escala 1:65 000

Abstract

Calderón is mostly covered by Quaternary volcanic sediments such us Fm. Cangahua, primary volcanic sediments from Pululahua volcano, Guayllabamba Fm., and old and recent landslides. This type of lithology had been exposed to various natural and anthropic fenomena that has caused the formation of gullies, cracks, mass movements, among others. For to characteristics of the soils, geotechnical maps have been developed until a depth of 6 m, based on field data in records of calicatas, statandar penetration test (SPT), and the visual-qualitative descriptions of seven projects carried out between 2005 and 2019 by Empresa Pública Metropolitana de Agua Potable y Saneamiento de Quito. Through superimposing of geological maps and granulometric classifications (U.S.C.S), and Mass Movements, Bearing Capacity, pre-existents geological maps and correlations of geotechnical profiles, five geotechnical zones had been characterized: Zone I (excellent), Zone II (good), Zone III (regular), Zone IV (bad) and Zone V (very bad), which describe qualitatively the geomechanical behavior of soils. It had also been determined that the SM and ML soils are predominant, between 84 and 87%, which contain low to zero plastic behavior and medium to dense compaction degree.