EVALUATION OF SIMULATED LANDFILL SETTLEMENT WITH DIFFERENT TYPES OF COVERS UNDER THE CONDITIONS OF AÇAILÂNDIA – MA

Abstract

Settlements are defined as absolute or relative descending vertical displacements of the soil. They can compromise the stability of the landfill, affect its operation and, respectively, increase the risks of failures and can cause damage to the environment and public health. Studying this parameter allows the development of monitoring and diagnostic strategies for effective management aimed at managing the operating time of each waste receiving area. In view of this, the present work aims to evaluate the settlements of a simulated sanitary landfill with different types of covering. Thus, this research was carried out at the State University of the Tocantina Region of Maranhão UEMASUL - Açailândia Campus. To this end, the experiment area was prepared with leveling of the land and installation of the overlapping of three reinforced concrete shackles of 0.46 m and with a total height of 1.40 m, the total area with 10 m² having 9 (nine) experimental cells with different layers of roofs (asphalt, coconut fiber, yellow ipê, civil construction tailings (RCC),  gypsum, crushed pruning and clay soil). In general, it was verified through the monitoring that took place in 210 days that the lysimeters had changes both due to the time factor, seasonality and degradation of organic material. Thus, it was observed that the roofs of milled material (asphalt) and demolition construction waste (RCC) roofs maintained the occurrence of settlement for all monitoring periods. Thus, the evaluations of experimental cells and the influence of the different types of cover layer are of paramount importance for the understanding of the behaviors of landfills.