Finite element modelling of a creeping slope using viscohypoplasticity
Finite element modelling of a creeping slope using viscohypoplasticity
Modelling of slow-moving landslides and creeping slopes and predicting their rate of movement can provide important information to reduce risk and related costs. However, numerical modelling of landslide movements that accounts for soil mechanical behaviour is scarce in literature, especially when rate-dependent mechanical behaviour such as creep is considered. In this contribution, we investigate usability of viscohypoplasticity for predicting rate of movement of slow-moving landslides. It is done first in a parametric analysis using simple slope geometry of the influence of viscous soil parameters and model geometry on the predicted displacement evolution with time. Furthermore, we present a 2D viscohypoplastic analysis of a cross-section of a creeping slope with highway embankment in the northern part of the Czech Republic. The modelled area is affected by deep rock block spreading with slow creep deformations of basalt blocks sliding on plastic basal marlstones the viscohypoplastic model is used to model creep deformations in the shearzone. The model parameters are calibrated by a back-analysis of the inclinometer data. It is shown that inclinometer measurements and their evolution in time compare well with model predictions.
J. Jerman; David Masin
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
7. Dams, embankments and slopes
https://doi.org/10.53243/NUMGE2023-189
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