Avaliação do penetrômetro manual na previsão da capacidade de carga de fundações superficiais em solos arenosos.

Abstract

This dissertation presents results of a comparative study on the application of SPT, CPT, manual static penetrometer (PEM) and load tests on plate in the estimation of the load capacity of sandy soils subjected to the action of superficial foundations. The objective is to verify the possibility of using the manual penetrometer, its advantages and limitations. The first stage of the research was carried out in a sandy soil deposit at the UFS Experimental Field, in Aracaju, where two (2) SPT-T surveys were performed, four (4) CPT assays, two (2) and several tests with the manual penetrometer in four (4) square arches, 1,30m side and 0,60m deep. The second stage of the research was carried out in the city of Cabedelo, also in sand deposits, where three (3) SPT probes and three (3) cavas were performed to perform penetrometric tests. In both sites measurements were made of specific weight in situ and the moisture content of the soil at the time of the tests, besides the sample collection for direct shear tests. Based on the data obtained from the load capacity predictions made through the various methods and the comparisons with the results of the load tests, the potentialities of the portable oil meter for this purpose were discussed. It was verified from these comparisons that the rupture stress or the permissible tension of sandy soils can be estimated from the manual penetrometer with the use of a correction factor. With this, the manual penetration equipment can be a useful tool for estimating the rupture or allowable tensile strength of sandy soils. Finally, it is recommended to increase the penetrometer database to reinforce the conclusions obtained.