DBPapers
DOI: 10.5593/SGEM2014/B12/S2.094

PROPPED DIAPHRAGM WALLS. CHARACTERISTIC PARAMETERS OF INFLUENCE

H. Popa, L. Batali
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, 739-746 pp

ABSTRACT
Diaphragm walls used for retaining deep excavations are often supported using struts, which mean in fact to create punctual supports. The analysis of the 3D effect of the props requires a 3D numerical modelling. The analysis has to take into account wall versus soil or strut stiffness ratios, which influence and determine the final response of the retaining wall. Also, the horizontal distance between struts has a major impact on earth pressure distribution on the wall. Paper presents the numerical modelling of a diaphragm wall simply propped by struts at its upper part. To emphasize the 3D effect of the struts, the horizontal distance between struts and the wall stiffness are varied. The earth pressure redistribution (arching effect) is also emphasized.

Keywords: 3D numerical modelling, diaphragm wall, characteristic parameters