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Author(s):	Schneider-Muntau, Barbara
Title:
Abstract:	To quantify the interaction between structures and creeping slopes, 3D calculations under consideration of a time-dependent material behaviour are necessary. In this paper 3D finite element calculations are performed on a hypothetical creeping slope. The time-dependent material parameters are determined by back calculation on a slope without any structures. Subsequently, the influence of a retaining wall and of a tunnel structure built in the creeping slope are investigated. The results of the modelling show that the structures locally decrease the creeping velocity of the slope. The influence of the tunnel structure is more pronounced due to its spatial extension. At the same time the stresses on the structures increase over time. Linear time-dependent material models do not consider the hydrostatic pressure in their formulation. Non-linear time-dependent material models, which are based on soil mechanical principles and which take the hydrostatic pressure into account, are therefore better suited to represent the time-dependent soil-structure interaction. Um die Interaktion zwischen Kriechhang und Bauwerke zu quantifizieren, sind 3D-Berechnungen und die Berücksichtigung eines zeitabhängigen Materiaverhaltens notwendig. In diesem Beitrag werden 3D Finite Elemente Berechnungen an einem hypothetischen Kriechhang durchgeführt. Die zeitabhängigen Materialparameter werden durch Rückrechnung an dem noch nicht verbauten Hang bestimmt. Es werden im Modell anschließend der Einfluss einer Verbauwand und einer Tunnelstruktur im Kriechhang untersucht. Die Ergebnisse der Modellierung zeigen, dass die Bauwerke die Kriechgeschwindigkeit des Hangs lokal verlangsamen. Der Einfluss des Tunnelbauwerks ist dabei durch seine räumliche Ausdehnung ausgeprägter. Gleichzeitig nehmen die Spannungen auf das Bauwerk mit der Zeit zu. Lineare zeitabhängige Materialmodelle berücksichtigen in ihrer Formulierung den hydrostatischen Druckanteil nicht. Nichtlineare zeitabhängige Materialmodelle, die auf bodenmechanischen Grundlagen beruhen und den hydrostatischen Druckanteil berücksichtigen, sind daher besser geeignet um eine zeitabhängige Boden-Bauwerk-Interaktion abzubilden.
Source:	Geomechanics and Tunnelling 13 (2020), No. 6
Page/s:	612-619
Language of Publication:	English/German

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