Banca de DEFESA: FRANCISCO FELINTO DE LIMA NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FRANCISCO FELINTO DE LIMA NETO
DATE: 27/08/2025
TIME: 13:30
LOCAL: meet.google.com/nes-gkoc-gud
TITLE:

Study of the compacted and undisturbed geomechanical behavior of tropical residual soils from the Barreiras Formation in Bananeiras/PB

KEY WORDS:

Shear strength; oedometer compression; residual soils

PAGES: 156
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SPECIALTY: Mecânicas dos Solos
SUMMARY:

This study investigates the geomechanical behavior of tropical residual soils derived from sandstone rocks of the Barreiras Formation, located in Bananeiras, PB, Brazil. The main objective is to analyze and compare the physical parameters of the soil in its natural and compacted conditions, contributing to a robust catalog of the geomechanics of this formation. Characterization tests were conducted on three soil layers (AM-01, AM-02, and AM-03), classifying them according to the Unified Soil Classification System (USCS) as ML and CL. The results indicate that the AM-02 sample is moderately dispersive, while the other two samples showed no dispersion. Permeability coefficient values suggest that all soils have relatively low permeability, characteristic of clayey and silty soils, which may affect drainage and the stability of structures built upon them. Oedometer tests revealed that the non-saturated soil exhibited less deformation compared to the saturated soil. Saturation reduces matric suction, leading to soil collapse, highlighting the importance of considering saturation conditions when evaluating the behavior of residual soils. Shear strength varied among the samples: AM-01 behaved as a normally consolidated soil in its undisturbed state and as pre-consolidated in its compacted state; AM-02 displayed peaks of resistance, while AM-03 exhibited greater heterogeneity.

COMMITTEE MEMBERS:
Presidente - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Interna - 1284389 - MARIA DEL PILAR DURANTE INGUNZA
Externa à Instituição - BRUNA SILVEIRA LIRA - UFPI