Ingeniería Civil y Mecánica

Permanent URI for this communityhttp://repositorio.uta.edu.ec/handle/123456789/898

Browse

Has files: YesSubject: search.filters.subject.CORRELACIÓN

Search Results

Now showing 1 - 10 of 25
  • No Thumbnail Available
    Item
    Análisis de las correlaciones entre cbr, dcp, propiedades índice y mecánicas en suelos de la parroquia Moraspungo, cantón Pangua, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil., 2025-02) Chica Torres, Marlon Adin; Pérez Maldonado, Ruth Lorena
    In the province of Cotopaxi, numerous roads are covered with a granular or ballast layer, representing a viable alternative for connecting communities and facilitating transportation. However, these roads have an irregular and variable surface, requiring good traction for the vehicles traveling on them. This highlights the need to pave these local roads. Nevertheless, information regarding the index and mechanical properties of the soils is limited. This experimental study aims to correlate these properties for application in the design of flexible pavements, benefiting the Pangua canton and other areas with similar soils. In this experimental study, four roads in the Moraspungo parish were selected. Random road sections were chosen, and 12 soil samples were collected through open-pit excavation (each weighing 50 kg) after removing the vegetative layer. Field and laboratory tests were conducted, including correlation analysis between CBR, DCP, and index and mechanical properties, following AASHTO and ASTM standards. These analyses allowed us to determine the soil’s resistance and bearing capacity. Through the results and the application of analytical and exploratory research, simple and multiple correlations were obtained, along with their corresponding CBR values. Using these CBR values, the flexible pavement design and its structural layers were developed based on the AASHTO 93 methodology. Linear regression analyses identified simple and multiple correlations, considering only those exceeding 70 percent. Fourteen significant correlations were determined, with coefficients ranging between 0.710 and 0.999. Finally, a flexible pavement was designed for one of the selected roads, with the following structural layer thicknesses: 6.5 cm for the asphalt layer, 15 cm for the base, and 20 cm for the sub-base. These values were obtained from laboratory tests and correlation analyses.
  • No Thumbnail Available
    Item
    Análisis de la correlación entre CBR, DCP, propiedades índice y mecánicas en suelos de las parroquias el Corazón, Pinllopata y Ramón Campaña del cantón Pangua, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-08) Ojeda Martínez, Aracelly Nathaly; Pérez Maldonado, Ruth Lorena
    As time passes, roads face an increase in the loads that the pavement structures must support. The analysis of the correlation between CBR, DCP, index and mechanical properties of 12 soil samples collected in the study sectors was carried out. The index properties: the liquid limit, plasticity, plasticity index and granulometry, while the mechanical properties: density, optimal humidity and support capacity. CBR and DCP tests were carried out to determine the resistance and bearing capacity of the soils. For the correlations, an analytical approach methodology was used to analyze the data collected in the field and laboratory, and with these define simple and multiple correlations to obtain, from one of them, the CBR value necessary for the design of the flexible pavement in one of them. the routes studied. For which the qualitative and quantitative research method was applied, which allowed determining the data necessary for the calculation of the flexible pavement structure under the AASHTO 93 methodology. The results obtained were used to design the structure of the flexible pavement according to AASHTO Method 93, based on the CBR values obtained in the laboratory and through selected correlations, specific thicknesses were determined for the asphalt layer (10 cm), the granular base (15 cm) and the subbase (15 cm), with the option of starting with an initial asphalt layer 5 cm thick.
  • No Thumbnail Available
    Item
    Correlación entre el CBR, DCP, propiedades índice y mecánicas en suelos de la parroquia Isinliví y Chugchilán del cantón Sigchos, provincia de Cotopaxi.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-08) Gallardo Castañeda, María Paula; Peñafiel Valla, Lourdes Gabriela
    This experimental work arises due to the limited existing information on soil analysis in the sector. Recognizing that such characteristics are crucial for the planning and execution of construction projects, a soil analysis was conducted in the parishes of Isinliví and Chugchilán, located in the Sigchos canton, Cotopaxi province. The results of this analysis will provide a comprehensive understanding of the existing correlations. To establish significant relationships, an exhaustive analysis was performed on 12 soil samples extracted from the study area. These samples were subsequently subjected to both field and laboratory tests. Once the results were obtained, they were tabulated and analyzed; this data allowed for the establishment of correlations between various soil characteristics, providing detailed insights into their properties.In the subsequent correlation analysis between the different tests, 22 significant correlations were identified, with determination coefficients ranging from Good to Excellent. Notably, the correlation between the California Bearing Ratio (CBR) and the natural moisture content yielded a coefficient of 72.27, which was utilized in the pavement design process. Finally, a traffic study was conducted in the area to formulate a flexible pavement design proposal. The CBR values employed were derived from both laboratory tests and those obtained through the correlations, confirming their suitability for application in the pavement design phase.
  • No Thumbnail Available
    Item
    Análisis de las correlaciones entre el cbr, dcp, propiedades índice y mecánicas en suelos de las parroquias Saquisilí, Chantilín y Cochapamba, cantón Saquisilí, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-02) Núñez Núñez, Diego Alejandro; Peñafiel Valla, Lourdes Gabriela
    Currently, in the Saquisilí canton, the database corresponding to index and mechanical properties of the soil is short, and it also has several ballasted roads that require paving. In order to find preparation equations and carry out a pre-design of flexible pavement for the benefit of the parishes of the Saquisilí canton and sectors with soils with similar characteristics. Within the study area there is a road corresponding to the Chantilín parish, a road in the Saquisilí parish and finally a road in the Cochapamba parish. A total of 12 pits were carried out in the study area. First, the DCP and Sand Cone tests were carried out in situ. Subsequently, 50 kilograms of soil sample was extracted from each pit to be tested in the laboratory and determine the index and mechanical properties. based on AASHTO, ASTM and SUCS standards, from which 29 correlations were derived, obtained with a degree of reliability greater than 50 percent; As a result, the structural pavement package was designed for a new road in the Chantilín parish with laboratory CBR, obtaining thicknesses of 7 cm for asphalt layer, 10 cm of base layer and 11 cm of subbase layer; On the other hand, with CBR to improve, thicknesses of 7 cm for asphalt layer, 11 cm of base layer and 12 cm of subbase layer will be obtained. Finally, the pavement predesign will benefit the inhabitants and surrounding areas of the Chantilín parish.
  • No Thumbnail Available
    Item
    Análisis de las correlaciones entre CBR, DCP, propiedades índice y mecánicas en suelos de las parroquias las pampas y palo quemado, cantón Sigchos, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-02) Nauque Villacís, César Alexander; Pérez Maldonado, Ruth Lorena
    The main objective of this experimental work was to establish correlation equations between CBR (California Bearing Ratio), DCP (Dynamic Cone Penetrometer), and the index and mechanical properties of soils in the Las Pampas and Palo Quemado parishes of the Sigchos canton in the Cotopaxi province. The intention is to use these equations to obtain approximate values of soil properties and apply them in the preliminary design of a flexible pavement structure. It is important to note that this proposal does not aim to replace the standardized soil testing methodology. Achieving this objective was divided into three phases. In the first phase, four roads were selected from among the two parishes, with three boreholes per road for a total of twelve. In these boreholes, in-situ tests were conducted, and samples were extracted for laboratory analysis. Laboratory tests were performed on the twelve samples to determine the index and mechanical properties of the soils. For the second phase, correlations were established between these properties, considering those with a coefficient of determination greater than seventy percent as valid. Finally, in the third phase, the design of the flexible pavement structure was carried out for the road connecting both parishes under study. In this process, both the laboratory-obtained CBR and the CBR derived from a selected correlation were used. It is noteworthy that there was no difference, as for both methods, the design consisted of an asphalt layer of 10 cm, a base of 15 cm, and a subbase of 20 cm. It was concluded that there is not a good correlation between CBR and DCP, as the coefficient of determination fell outside the acceptable range.
  • No Thumbnail Available
    Item
    Correlación entre CBR, DCP, propiedades índice y mecánicas en los suelos de las parroquias Guasaganda y Pucayacu del cantón La Maná, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-02) Pazmiño Viera, María Fernanda; Peñafiel Valla, Lourdes Gabriela
    The provinces of Guasaganda and Pucayacu belonging to the La Maná canton, being sectors far from the main axis, have roads that do not ensure correct vehicular circulation due to the lack of information on the properties of the soil. For this reason, the present research work seeks to expand the database of said soils and in this way determine a magnitude between the California Bearing Ratio (CBR) test and the Dynamic Cone Penetration (DCP) test, since they are factors that have a direct impact. with the design of flexible pavements. The investigative project consists of 3 phases where it started from a preliminary study of the area, the excavation of 12 pits and the extraction of approximately 50 kilograms, thus executing in situ tests such as the Cone and Sand and DCP in accordance with the stipulated regulations. Following this, the index and mechanical properties were developed through tests carried out in the laboratory, to later comply with phase 2, which corresponded to the determination of different correlations between tests, where a reliability coefficient of 55.68 percent was obtained in the compensation between CBR and DCP are a moderate range of acceptance. These CBR values obtained in compression and in the laboratory made it possible to apply them in two preliminary designs of the flexible pavement where it was verified that, since there was no greater variability in percentages, the pavement design consisted of the same thicknesses, 5 cm for layer. asphalt, 15 cm for base and 20 cm for subbase.
  • No Thumbnail Available
    Item
    Análisis de las correlaciones entre el CBR, DCP, propiedades índice y mecánicas en suelos de la provincia de Cotopaxi; del cantón Latacunga; parroquia Mulaló
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-09) Viscarra Nájera, Bryan Alexander; Chérrez Gavilanes, Diego Sebastián
    The investigative work is contemplated within a macro project belonging to the parishes of the Cotopaxi province, whose purpose is to establish correlations between the index and mechanical properties based on the CBR and DCP tests, to obtain CBR values of the soil, but in function of these properties, thus speeding up the execution time of the laboratory test and optimizing costs in them. For this, field tests were carried out, which were: open pit (test pits), field density by the Ottawa sand-cone method and DCP; Regarding the laboratory tests carried out, it is detailed: moisture content, granulometry, specific gravity, Atterberg limits, modified supervisor type B and CBR. Once the tests were completed, the results were tabulated and then used in the elaboration of the correlations. In total, 20 correlations were obtained, of which 15 were carried out with simple regression methods (linear, polynomial, logarithmic) and 5 with the method of least squares (for correlations with 3 variables); these correlations have a degree of compensation greater than 50 percent, which is statistically considered acceptable. To complete the project, the flexible pavement design was carried out with the CBR calculated in the laboratory, as well as the CBR obtained by the previously generated correlations, as a result of which similar dimensions were obtained in the structural package of the pavement with the two values of CBR.
  • No Thumbnail Available
    Item
    Correlación entre el CBR, DCP, propiedades índice y mecánicas en suelos de la parroquia Alaquez y Joseguango bajo del cantón Latacunga, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-08) Amán Chicaiza, Karina Lizbeth; Aldás Sánchez, Milton Rodrigo
    The present research work belongs to a macro project that is being carried out in the province of Cotopaxi, which seeks to determine empirical equations through correlations between CBR, DCP and index and mechanical properties of representative soil samples from different parishes belonging to each of the cantons that make up the province of Cotopaxi, This is done so that these equations allow to obtain an approximate value of the properties of the soil, which would mean a saving of time and money in the realization of tests. This experimental work was developed through phases, starting from a preliminary study, where the study area was identified and the points from which the representative soil samples of the Alaquez and Joséguango Bajo parishes were extracted, based on that information the first phase was carried out that includes the execution of field and laboratory tests of the 12 soil samples extracted, followed by the second phase in which different correlations were determined between the soil properties found obtaining values of determination coefficients between 50 and 100 percent. Subsequently, a flexible pavement design was made for a rural road with the CBR obtained through the correlations and the one obtained in the laboratory. Finally, the studied samples were zoned and classified based on the results obtained through granulometry tests, Atterberg limits and SUCS and AASHTO standards.
  • No Thumbnail Available
    Item
    Análisis de las correlaciones entre el CBR, DCP, propiedades índice y mecánicas en suelos de las parroquias Guaytacama y Toacaso del cantón Latacunga, provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2023-03) Paredes Ponluisa, Christel Sofia; López Arboleda, Alex Gustavo
    The purpose of this experimental research work is to analyze the types of soils existing in the Guaytacama and Toacaso parishes, starting from field and laboratory tests, up to the analysis of the results and the existing correlations between their different index and mechanical properties. , so that data such as the field CBR can be obtained, a parameter that is used for the preliminary design of pavements. This research work was carried out in a series of phases built by different processes, the first phase includes the collection and testing, where 12 samples were extracted in random places of collecting roads, to obtain these samples the PCA technique was used, followed by study and analysis both in the field and in the laboratory. Later in the second phase, the different correlations were elaborated, providing determination coefficients between 50 and 96 percent, the best equation was chosen based on the highest determination coefficient. The results obtained through the correlations serve to carry out preliminary pavement designs, this drives phase three of this work, which was the design of a flexible pavement of a road chosen based on the greatest need of the inhabitants, using one of the correlations made, finally there is phase four where the classification of the soils of the study parishes was carried out based on the AASHTO and SUCS standards, this classification was captured on a map with the help of the ArcGIS software..
  • No Thumbnail Available
    Item
    Correlación entre el CBR, DCP y las propiedades índice y mecánicas en los suelos del cantón Salcedo de la provincia de Cotopaxi
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2022-09) Jiménez Sisa, Paúl Fernando; Frías Torres, Alex Xavier
    The following degree project is part of a macro research being carried out in the province of Cotopaxi, taking into account the cantonal division, which seeks to determine correlations between the different index and mechanical properties of the soil, mainly considering the DCP and CBR test, in order to obtain the same results of the CBR, but in less time and cost by means of the DCP test. The tests are determined from twelve soil samples collected in Salcedo canton, Cotopaxi province. The tests performed in situ are: open pit, field density by the Ottawa sand cone method and the dynamic penetration test. The tests performed in the laboratory are: Atterberg limits, specific gravity, granulometry, modified proctor type B and CBR. The results obtained from the tests are analyzed to determine the type of soil and its characteristics. Twenty correlations were obtained, applying simple regression and least squares statistical methods; these correlations were good to excellent, with coefficients of determination between 60 and 94 percent. To finalize the project, the design of the flexible pavement was carried out, using the CBR obtained in the laboratory and the CBR calculated with the proposed correlations. The same characteristics were obtained in both designs, thus confirming that the correlations are acceptable and can be used for the pre-design of the asphalt.