On the Feasibility of Slope Stability Analysis during Freezing and Thawing
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Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Infrastructure and environmental engineering (MPIEE), MSc
Publicerad
2023
Författare
Sjöbeck, Gustav
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The topic for this thesis is to investigate slope stability in relation to climate driven
condition changes. Focus was directed on freeze and thaw process of soil and how it
affects the stability of slopes. This is then linked to a case study close to Bispgården
in Sweden. The Bispgården case had strong indications of frost related damages.
The thesis further present freeze and thaw related movement and behaviors of the
soil. Mainly focusing on phase change, displacements, water and ice saturation and
heat distribution within in the soil body. The frozen and unfrozen soil model in
PLAXIS was used to model the behavior of a freezing and thawing soil. Resulting
in a analyze that indicated a reduction of the slope stability in a semi frozen stage.
However, was the use of this model numerically challenging and very sensitive to
parameter changes. The conclusion could be drawn that the feasibility of accurately
analyzing freeze and thaw related stability problems are limited, due to the high
prerequisite. Very specific data- and skill-sets are needed to utilize the potential.
This could be problematic with the potential effects of the ongoing climate change
in mind.
Beskrivning
Ämne/nyckelord
Slope stability, freezing soil, thawing soil, phase change, frozen and unfrozen soil model