Obtaining the Mechanical Parameters for the Hardening Soil Model of Tropical Soils in the City of Brasília

J.F.R. Rebolledo, R.F.P. León, J. Camapum de Carvalho

Article

Soils and Rocks, São Paulo, 42(1): 061-074, January-April, 2019 | PDF


Abstract

In this article, the mechanical parameters of characteristic soils of the city of Brasília are obtained, calibrated and validated for the Hardening Soil (HS) model, based on laboratory and field test results obtained in previous research studies conducted in the Experimental Field of the University of Brasília (CEGUnB). The strength and compressibility parameters are obtained from triaxial CU tests (with isotropic and anisotropic consolidation) and one-dimensional consolidation tests, respectively. The obtained parameters are calibrated via explicit numerical modeling using the finite element method and the SoilTest module of Plaxis software. After the parameters are evaluated and calibrated, a geotechnical model characterizing the city of Brasília for HS is proposed. Finally, this geotechnical model is validated through the numerical modeling of load testing on footings and piles conducted at the CEGUnB. It is concluded that the mechanical behavior of the Brasília soils under natural moisture conditions can be modeled using the HS model.


Submitted on July 17, 2018; Final Acceptance on April 04, 2019; Discussion open until August 30, 2019. DOI: 10.28927/SR.421061