DBPapers
DOI: 10.5593/SGEM2014/B12/S2.086

NUMERICAL ANALYSIS OF SUBSOIL WITH THREE DIFFERENT CONSTITUTIVE MODELS

Z. Gallikova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 2, 673-682 pp

ABSTRACT
The foundation of high-rise buildings in terms of Bratislava (in Slovakia) is in many cases realized by raft foundation. Load transfer of structure to the ground is through direct contact; a base plate and a ground. Subsoil of the considered building is formed by a geological layer of fine-grained soils, which are known for their higher degree of overconsolidation, which influences the value of the coefficient of earth pressure at rest. Unavailability of in situ measurements of the coefficient K0 is in the analysis taken into account by using the limits for a normally consolidated and a overconsolidated soils. Input parameters for ground layers are calibrated from the laboratory experimental measurements. Numerical analysis of the contribution compare prognoses of vertical deformation using three constitutive models of soils – Mohr – Coulomb, Cam Clay model and more advanced non–linear hypoplastic model. Subsoil deformation for the different phases of realization is confronted with the deformetric measurement. Discrepancy between prognoses and monitoring of the selected models is supplemented by optimization of the selected soil parameters with back analysis.

Keywords: numerical analysis, earth pressure at rest, settlement, constitutive models.