Ensaios de arrancamento de geogrelha, utilizando um equipamento reduzido, em amostras de um solo típico da cidade de Manaus

Abstract

This work aims at the realization of geogrid pullout tests in a typical soil of the city of Manaus, using a small laboratory equipment. The soil in natura used in the tests was collected within an Area of Permanent Protection (APP) at the Federal University of Amazonas campus, representing a wide area of topsoil from the city of Manaus, the clayeysilty- sandy composition. From the original sample mixture with the addition of 20%, 40% and 60% sand deposit by mass were prepared. The soil samples and mixtures were characterized by the writings of Grit, Real Density, Liquid Limit, Limit Plasticity, Compression (Standard Proctor), California Support Index (CSI) and Triaxial Compression. Subsequently, tensile testing of Tensar geogrids in pullout of small laboratory equipment, experimental in nature, in which they varied the type of soil were performed, aiming a comparison with the manufacturer's specifications, and the test speed and type geogrid. During the research, a computer program was developed to facilitate statistical analysis of the results of pullout tests and enable the design of reinforced embankments with geogrids. Those tests proved that the insertion of the geogrid coupled to sanding, the original soil increments the geotechnical performance of the assembly, opposite the pullout requests, in which the mixture of 60% sand that best represents the quality of the strength parameters for reinforced embankments.