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Author(s):	Nitzsche, Kornelia; Herle, Ivo
Title:
Abstract:	Der Gleichgewichtszustand einer Böschung wird oftmals mithilfe von Grenzgleichgewichtsmethoden berechnet. Dabei wird vernachlässigt, dass bis zum Erreichen des Scherwiderstands eine Verschiebung in der Scherzone stattfinden muss. Die Scherspannungsentwicklung hängt u. a. vom Lagerungszustand und den hydraulischen Bedingungen ab. Folglich ist die Mobilisierung des Scherwiderstands in der Scherzone nicht homogen, was zu einer Überschätzung der Böschungsstandsicherheit führen kann. In diesem Bericht wird ein Berechnungsverfahren vorgestellt, das die Entwicklung der Standsicherheit in Abhängigkeit von der Scherdehnung in der Scherzone koppelt. Zur Veranschaulichung werden zwei einfache Beispiele für eine Böschung mit ebener Gleitfläche gezeigt. Slope stability with regard of the stress-strain behaviour during shearing The state of equilibrium of a slope is often evaluated with help of limit equilibrium methods. Here, it is neglected that a deformation in the shear zone has to take place before the maximum shear resistance is reached. The shear stress development depends amongst others on soil density and hydraulic conditions. Consequently, the mobilization of the shear resistance in the shear zone is not homogeneous, which can lead to an overestimation of the slope stability. This report shows a calculation method which couples the development of the slope stability with shear strain in the shear zone. For illustration purposes, two simple examples of a slope with a planar slip surface are shown.
Source:	geotechnik 44 (2021), No. 3
Page/s:	191-197
Language of Publication:	German

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