Browsing by Author "Naula Salazar, Andrea Elizabeth"

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Análisis de los asentamientos en suelos aluviales de la llanura del río Tarqui debido a los terraplenes que se construirán para la autopista acceso sur a Cuenca
(Universidad de Cuenca, 2022-03-31) Naula Salazar, Andrea Elizabeth; Bojorque Iñeguez, Jaime Asdrúbal
The Ministerio de Transporte y Obras Públicas (MTOP), the entity in charge of managing, evaluating, implementing, planning and developing highway projects, contracted the study of the highway Acceso Sur a Cuenca. The study considers the construction of embankments to support the road, where some sections are located on soft soils, which, according to the properties of each stratum, can cause settlement problems that compromise the serviceability of the road. This degree project is focused on calculating and analyzing the settlements generated in the embankments, including a sensitivity analysis of the most influential parameters involved in the calculation of settlements, using finite element methods (PLAXIS). The evaluation is carried out in the embankment section of the 11+530 abscissa of the road, that is located the floodplain of the Tarqui river, where information is available from the borings performed on the site. The foundation soil was characterized by means of geological, geophysical and geotechnical information (laboratory and in situ tests), finding strata of granular and fine soils. In the analyzed embankment the evaluation of the global stability was performed, resulting in safety factors for static conditions of 1.88 and pseudo-static of 1.11, considering the construction of a pedraplén below the toe of the embankment as an improvement measure. For the serviceability condition, using PLAXIS and the Soft Soil constitutive model, the settlement obtained was 0.36 m (less than the regulations) when the excess pore pressure has been dissipated. The fine soil materials have permeability, over consolidation and compressibility characteristics that influence the settlement calculation, therefore, the compression and recompression index (CR and RR) were selected as the most influential parameters within the sensitivity analysis, whose ranges of variation were defined by a statistical evaluation of the sample and population mean of these parameters, resulting in a CR range of (0. 14, 0.24) and RR range of (0.02, 0.04) for clays and for silts of (0.11, 0.15), (0.03, 0.02) of CR and RR, respectively. From the sensitivity analysis, it was found that the most influential parameter on settlement is CR of Clay 2 stratum with a sensitivity percentage of 66% followed by CR of Clay 1 with a value of 16 % and finally the compression index of Silt 1 with a percentage of 6%. In the case of the recompression indexes for the 3 strata, values of 6%, 5% and 1% have been obtained for Clay 2, Clay 1 and Silt 2, so it is evident that they do not have a great influence on the calculation of deformations.
Diseño de prefactibilidad para la mini cntral Hidroeléctrica de Susudel
(2010) Naula Salazar, Andrea Elizabeth; Coello Granda, Cristian Iván
The prefeasibility study of Susudel mini hydropower plant has a design flow of 3.5 m3/s. In order to design the hydraulic structures a flow rate of 130 m3/s, which corresponds to a return period of 100 years, has been chosen. Water from “Leon” river will be taken in the place where the dam is located (2257 meters above sea level). In that place, a dam will be built with a conventional intake structure (lateral intake). First, water will be transported following the left margin of the Leon River through a rectangular channel. Second, this flume carries the design flow to the sand trap in which the remaining sediments are removed. Next, water passes to a cargo tank connected to a pressure steel pipe with 0,900 meters of diameter. Then, water reaches the Roundhouse (1985 meters above sea level) that contains all electromechanical and auxiliary equipment. The flow passes through a Pelton turbine with the following characteristics: 90% of performance coupled to the generators, an output power of 8.34 MW turbine, with a gross head of 270 meters. Finally, water that has pass through the turbine is dislodged by a channel at elevation 1958 meters above sea level. The project budget is around $ 7700000.