DBPapers
DOI: 10.5593/SGEM2014/B12/S2.004

ADVANCED BACK ANALYSIS OF RETAINING STRUCTURES BASED ON HIGH PRECISION GEOMONITORING

C.E. Miroslav Kozel , J. Zalesky
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, 25-32 pp

ABSTRACT
Geotechnical monitoring is implemented in cases of important structures proposed in the geologically complex environment, which is difficult to describe or predict the behavior. Readings are usually displacements or deformations and or anchor forces, if the structure is anchored. These data are then compared with the project. The measured deformations do not give an idea of the stresses in the structure. For a successful assessment of the structural design is appropriate to estimate the internal forces in the structure or estimate of the total load. Analysis of internal forces and the total load on the structure, however, is usually not carried out due to the difficulties associated with limited, although high precision measurement methods used. Errors contained in measured values cause due to large bending stiffness of retaining structure significant variations of values of directly calculated loads. The subject of this paper is a proposal of the method of calculation of an estimate of the total load on the structure based on measured deformations with highly accurate methods of geotechnical monitoring. This method is suitable for reverse engineering structures where substantial additional measurements in the vicinity of the structure is not performed or their explanatory power is low due to the considerable heterogeneity of the environment or unforeseen effects of water pressure. Making the FEM model in this case is hard to complete or not possible and definitely not efficient. The principal points that needed to be overcome in the design of methods are: -* Typification of appropriate structures for the analysis and its generalizations, -* Appropriate interpretation of measured structural deformation, -* Proposal of governing equations and effective actions to eliminate the influence of measurement errors on the resulting internal forces and structural loads.

Keywords:monitoring, back analysis, retaining wall, internal forces, loads