guest ::
| Home > Publications database > Stability assessment of variably saturated hillslopes using coupled hydromechanical models |
| Home > Publications database > Stability assessment of variably saturated hillslopes using coupled hydromechanical models |
| Book/Dissertation / PhD Thesis | FZJ-2021-04356 |
2021
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
Jülich
ISBN: 978-3-95806-583-3
This record in other databases:
Please use a persistent id in citations: http://hdl.handle.net/2128/29159 urn:nbn:de:0001-2021122136
Abstract: Landslides are one of the most important natural hazards that endanger human life and infrastructure all around the world. Landslides occur as a result of failure in the mechanical balance within slopes. Failure may be initiated by various causes including earthquakes or man-made activities such as excavation that influence the stress distribution. However, in many cases, landslides are induced by rainfall due to the direct influence of subsurface hydrological processes on the mechanical balance of soils. In particular, changes in water content of the soil because of infiltration alter the matric suction and weight of the slope material and therefore the effective stress distribution and slope stability. In the past decades, different hydromechanical models have been developed to consider the interaction between soil hydrology and soil mechanics for slope stability predictions. Available models have typically considered a range of simplifying assumptions to lower the computational costs and increase the numerical robustness of the simulations. For example, many models only consider a one-way influence of hydrological processes on the mechanical status of a soil and feedbacks from soil mechanics to hydrology are ignored. In addition, the actual twophase flow system of water and air is commonly replaced with a one-phase flow system by ignoring the variation in pore air pressure. Moreover, most of the available models that couple hydromechanical processes use 1D or 2D representations of subsurface flow, which may lead to an overly simplified representation of hydromechanical processes in the case of more complex subsurface layering. Finally, many models use simplified limit-equilibrium methods to analyze slope stability despite known limitations, such as the need to assume a failure surface a priori. Recently, fully coupled hydromechanical models have been developed that overcome the above-mentioned simplifications in the modeling of coupled hydromechanical processes. A state-of-the-art coupled hydromechanical modelling approach for slope stability analysis is based on the Mohr-Coulomb concept, which allows to evaluate the stability at each point within a hillslope using the so-called Local Factor of Safety (LFS) approach. [...]
; 
|
The record appears in these collections: |
PDF
Fulltext by OpenAccess repository