DBPapers
DOI: 10.5593/sgem2012/s02.v2028

NUMERICAL MODELLING AND CONSTITUTIVE SOIL MODELS FOR DEEP EXCAVATIONS ANALYSIS

C. CAPRARU, A. CHIRICA
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 215 - 222 pp

ABSTRACT

Deep excavations are common construction works in dense built urban areas. The main
function of retaining walls and their support systems is to ensure the overall stability
and control the soil displacements. The design of such geotechnical works require a
detailed analysis of soil-structure interaction, by considering the various construction
stages and quantifying the effects induced in soil, retaining structural elements and
nevertheless to neighbouring buildings or utility networks. The paper presents an
overview of the main constitutive soil models particular to modelling deep excavations
and their application in numerical analysis using finite element method. Therewith, the
interpretation and use of field measurements for both evaluating the design geotechnical
parameters and estimating the stress and strain state of soil around excavations will be
presented. The theoretical aspects will be illustrated by a well-documented case study of
a deep excavation. The monitoring results of the excavation consist of measurements of
retaining wall deflections and vertical displacements of soil in the vicinity of the
excavation. The profiles of horizontal and vertical displacements obtained through finite
element analysis are compared with the measurements. Thus, the initial hypotheses
adopted in calculations are refined and demonstrated

Keywords: retaining walls, constitutive soil modeling