Banca de DEFESA: JOÃO PAULO HORA CARNEIRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOÃO PAULO HORA CARNEIRO
DATE: 21/06/2022
TIME: 15:00
LOCAL: DEFESA FEITA ON LINE
TITLE:

GEOMETRIC MODELING AND GEOLOGICAL RISK ANALYSIS IN ROCKY SLOPES APPLIED TO FAULT SYSTEMS
TRANSVERSAL (N120° AND N090°) OF THE CITY OF SALVADOR, BAHIA, BRAZIL

KEY WORDS:

Hazard areas, Barra’s fault, Brotas’s fault, Sliding, Toppling.

PAGES: 44
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geologia
SPECIALTY: Geotectônica
SUMMARY:

The city of Salvador has a large portion of the population residing in areas of environmental hazzards, so a broad geological study is necessary to help preserve the lives and properties of the population in these regions. Geologically, Salvador has two main fault systems, originating from the tectonic events that generated, during the Cretaceous, the Recôncavo rift-type basin, the W, and the opening of the South Atlantic, the E, of the city. One longitudinal, oriented N030°-040º and the other transversal oriented N90°- 120° (STF). These systems control numerous valleys, highs and local slopes. This work aims to: (i) model the main families of structures that cause slope instability, (ii) analyze the geometric and kinematic characteristics of the studied fault systems, (iii) map possible unstable slopes, and (iv) make the survey of the preferred directions of the main brittle structures associated with transverse faults. In this study, the Barra and Brotas fault systems are modeled, in addition to the main N90°-120° orientation faults, in which models of predictive stereograms of mass movements were generated with data from discontinuity planes of the Recôncavo Basin that are associated with the structures found in the city of Salvador. It was found through kinematic modeling that the wedge sliding failure mechanism occurs more easily, followed by flexural toppling and finally planar sliding. The comparative analysis between the friction angles indicates that only the rock flexural toppling and planar sliding mechanisms have their capacity to occur increased. Finally, 19 unstable slopes were identified, 3 from the SFB and 13 from the SFBR, where the three failure mechanisms occur, with predominantly mass movement directions to the South and Southwest, heavily populated regions.

BANKING MEMBERS:
Interno - 268656 - LUIZ CESAR CORREA GOMES
Externo ao Programa - 5196747 - CARLSON DE MATOS MAIA LEITE
Externa à Instituição - ARACY SOUSA SENRA - UFS