Caracterización geológica-geotécnica en la vía la Saquea-Cantzama bajo desde el tramo ABSC 5+850 hasta 11+700, ubicada en las parroquias Cumbaratza y Guadalupe, cantón Zamora, provincia Zamora Chinchipe.
The present investigation "Geological-geotechnical characterization of the La Saquea-Cantzama Bajo road, from the ABSC 5+850 to 11+700 section, located in the Cumbaratza and Guadalupe parishes, Zamora canton, Zamora Chinchipe province", has the objective of performing the geological-struct...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://dspace.unl.edu.ec/jspui/handle/123456789/24639 |
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Add Tag | Summary: | The present investigation "Geological-geotechnical characterization of the La Saquea-Cantzama Bajo road, from the ABSC 5+850 to 11+700 section, located in the Cumbaratza and Guadalupe parishes, Zamora canton, Zamora Chinchipe province", has the objective of performing the geological-structural survey and describing the physical-mechanical properties of the geomaterials from tests, in order to determine the stability of the slopes by obtaining the Factor of Safety, in 5.85 km of road. The geological-geotechnical characterization was achieved with the field survey of eleven outcrops and four landslides; with the purpose of addressing those geological, geomorphological, structural units and instabilities of the materials. We took as a basis: topography with an area of influence of 75.19ha (scale 1:1000); geology of the geological map of Paquisha of the IIGE (scale 1:100000, year 2017); the geomorphological map of Paquisha of MAGAP-SIGTIERRAS (scale 1:25000, year 2015); Digital Terrain Models (DTMs) and orthophotos of SIGTIERRAS of the year 2010-2011. According to the field survey, along the entire stretch of the road there is a silty sandy soil with a clayey matrix, called sabulo product of the weathering of the Zamora Intrusive Complex, in some places there are basaltic andesite dikes with different strengths, highlighting a dike in the ABSC 9+040 with an approximate thickness of 50m, a kilometer long, a bearing N66°E, and a dip of 85°SE. There is also evidence of superficial deposits such as: colluvial-alluvial deposits, alluvial deposits and alluvial terraces. For the physical-mechanical properties of the geomaterials, information was obtained from four direct cut tests in the landslide zones, including information from four 1.5m deep calicatas by means of laboratory tests according to ASTM standards such as: granulometry, moisture content and Atterberg limits. In addition, a seismic refraction line located in the most representative landslide (ABSC 8+890 to 8+990). A simple compression test was carried out in the rock massif made up of basaltic andesite (ABSC 9+040) in order to know the mechanical properties of the rock; for the physical properties, the specific gravity test of solids was carried out according to the ASTM D854-58 standard; and the geomechanical classification of rock massifs was used as: RQD, RMR, SMR and GSI. With the rock mass strength analysis using the general stability parameters by the Hoek and Brown method adjusted to the Mohr-Coulomb criterion, in the Roclab v1.0 software, a cohesion and friction angle were obtained for the slope modeling in the Civil 3D v.2021 software. Finally, with the respective geomechanical and geometric characteristics of all the slopes, the Factor of Safety was calculated in Slide v6.0 software using the limit equilibrium method (Bishop simplified, Janbu simplified, GLE/Morgenstern-Price and Spencer method), indicating whether a slope is stable or not, for seismic and static loads, under current conditions. Key words: geology, geotechnics, geomaterials, stability analysis, factor of safety. |
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