Banca de DEFESA: JOSÉ IVAN DOS SANTOS JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSÉ IVAN DOS SANTOS JUNIOR
DATE: 20/12/2022
TIME: 14:00
LOCAL: Pós-Graduação em Engenharia Civil
TITLE:

Brasília Landfill: A Case Study on Slope Stability

KEY WORDS:

Waste, Geomechanics, Leachate drainage, Stability.

PAGES: 54
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The geotechnical stability of sanitary landfills is essential for the proper functioning of this enterprise and to guarantee its global safety. In Brazil, studies related to the stability and geotechnical monitoring of waste massifs began to intensify after the rupture in 1991 of the AS-1 phase of the Bandeirantes sanitary landfill in the city of São Paulo, in which 65,000m³ of the waste massif slid towards to the Bandeirantes Highway. During the execution of Stage 1 of the Brasilia Landfill, the massif presented excessive movements associated with excess leachate that overflowed at different points on the slopes and through the existing gas drains. These excessive movements were identified in slopes of the drain pipes and an intense erosion process of the covering soils. Therefore, this work aims to analyze the flow and stability of the sanitary landfill in Brasília, through a finite element discretization of the landfill, considering the stages of waste deposition and a definition of geotechnical parameters that depend on the composition of the landfilled waste. sanitary in Brasilia. Water flow and slope stability analyzes were performed using GeoSlope software: Seep/w, Sigma/w and Slope/w. The analyzes were performed in a coupled way, using flow and stress data for stability analyses. Stability analyzes were performed at each constructive stage based on stress variations obtained by the finite element method using Sigma/w software. Through this, it was observed in Step 1 that when the existence of pore-pressure is not taken into account, the FS obtained is 1.7, that is, it remained above the established by norm. However, when pore pressures are introduced, interpreted based on data and observations and distributed in a similar way to that detected by the electro-resistivity investigation, we find the safety factor that represents the excessive displacement observed, that is, FS = 1.

COMMITTEE MEMBERS:
Externo à Instituição - ALEXANDRE DUARTE GUSMAO - UPE
Externo à Instituição - FERNANDO ANTONIO MEDEIROS MARINHO - USP
Presidente - 1413233 - LEONARDO JOSE DO NASCIMENTO GUIMARAES