Geogrelha como reforço de subleito: estudo de caso em Goiânia - GO

Abstract

This work presents the study of the influence of the geogrids reinforcement on the performance of pavements with low compaction capacity soils. First, a brief study is presented on the different types of geosynthetics that are used in geotechnical engineering, as well as their interaction with the soil, thus, relating the main principal methods of road sizing on soft soils. The Giroud and Noiray(1981) method studied, was applied to determine the necessary height to compose a landfill of unpaved roads. In sequence, the Meyer and Elias method (1999) was used to verify the stability of the sizing and it calculated the security method for each case. These study is also composed for the analysis of operational cost benefit, that simulated the implementation cost of each proposed sizing, considering the spend materials, the labor, the necessary equipments and the verification of soil tensions and deformations, with the aid of the GeoStudio computer program. The object of these study is a road stretch that was scaled by calculating different heights of landfill layers for each type of previously selected geosynthetic, situated in a construction work in Goiânia – Goiás. The analysis of the results sought to highlight the projects that presented the best results and to study the possibility of implementing each case in relation to cost, feasibility and stability. It was verified that the design with the lowest possible implementation cost did not present better results than the case of design in the studied work as stability. However it is a possible solution to reduce the operational cost of execution of the reinforcement.