Zonificación de la amenaza por movimientos en masa inducidos por sismos, en el barrio San Luis de Miravalle, parroquia la Ferroviaria, suroriente del Distrito Metropolitano de Quito.

Abstract

The present Project is based on the zoning of the hazard by mass movements induced by earthquakes in the San Luis de Miravalle neighborhood using the Newmark methodology. This neighbourhood is of great importance since it is located on steep slopes because it is on the escarpment of the Conocoto – La Armenia macro mass movement. The methodology is based on obtaining a static safety factor map without the influence of an earthquake, which is achieved using the Slide 6.0 software. This map is then compared with the hazard map, which is developed based on the Newmark displacements (Dn), using the Slide 8.0 software and considering a seismic scenario. These maps have been obtained based on the lithostratigraphy, geotechnical properties (unit weight, cohesion and angle on internal friction) and the Digital Terrain Elevation Model of study area. For the modelling, 2 international earthquake have been considered that must have conditions similar to the geodynamic and seismic context of the Metropolitan District of Quito. The earthquakes considered are the Loma Prieta (1989) with a magnitude of 6.9 Mw and the Coalinga (1983) earthquake with 5.7 Mw. Finally, a hazard map is generated at a scale of 1:10.000 which classifies the hazard into four categories: low hazard (Dn < 1 cm), moderate hazard (Dn: 1 – 5 cm), high hazard (Dn : 5 – 15 cm), very high hazard (Dn > 15 cm).