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Notas
| Sobre o projeto: The research explores the use of pressuremeter tests to estimate parameters of resistance and deformability of the tropical soil of the Experimental Field of the Escola de Engenharia Civil e Ambiental (EECA) of the Universidade Federal de Goiás (UFG). Pedologically, the soil of the experimental field is a red latosol, classified as lateritic, in which penetrometric field tests, such as PANDA 2 and SPT, were carried out, in addition to characterization laboratory tests, such as granulometric analysis and MCT classification by the expeditious method, which complement and assist in the analysis of pressuremeter results. 7 drillholes were drilled to a depth of 6.0 m, accounting a total of 42 Ménard type G pressure tests on site. 3 boreholes were drilled in the rainy season and 4 boreholes were drilled in the dry season of the Goiânia rain regime. The presssuremeter tests followed the procedures and interpretations present in the relevant international standards. With the performance of the tests, the resistance properties, more specifically the limit pressure (pL), and the deformability properties, more specifically the Ménard module (EM) of the soil of the experimental field, were directly determined; the results and the pressure curves obtained in different climatic situations were compared; the pressuremeter results were related to those of other field tests and to the laboratory tests performed, the EM were related with the Young's elastic modulus (EY) obtained through triaxial tests; the soil-water characteristic curve (SWCC) of each meter of the profile studied was determined using Temp Cell and the WP4C equipment (DewpointPotenciaMeter) and a computational analytical method was used to indirectly estimate other resistance parameters such as cohesion (c) and the friction angle (ϕ). The results obtained show that variations in moisture content and suction from different climatic seasons considerably affect the stress-strain behavior of the studied soil to a depth of 5.5 m. The PMT test was shown to be sensitive to variations that the moisture content and suction can cause in the mechanical behavior of the soil, so that the pL and EM values were between 2 and 7 times higher for the tests carried out in the dry period. |
