Abstract
The Carpathian flysch is widely recognized as a geological environment prone to slope movements. This fragility in such an environment is due to its complicated geological and hydrogeological conditions. Weakened slip surfaces (developed in clay like material), in combination with present or past tectonic activity and difficult hydrogeological conditions with aquifers under pressure, are the main causes of slope movements. The article proposes to analyze the design of remedial action in a landslide area near Žilina. Slip surfaces and water conditions are assumed regarding present geotechnical monitoring. Deep cut with two rows of pile walls is analyzed by the limit equilibrium method and finite element analysis. Interaction between two walls and the effect of an amount of volume of sliding mass on resultant earth pressures and anchor forces were studied. The results from finite element analysis are compared with analytical calculations and the differences are discussed.
Highlights
The environment of the Carpathian flysch creates complicated geological conditions
Highway D1 near Žilina in part Lietavská Lúčka – Višňové passes through this landslide-prone area in the Carpathian flysch
Due to insufficient information on deformation parameters the finite element method (FEM) model was used just to verify the mechanism of walls interaction
Summary
Often, layering of coarse permeable layers (sandstone, conglomerate which are aquifers) with high strength, and in some places weathered soil like claystone in combination with tectonics, presents positive conditions for development of slope movements in the form of landslides and block deformations. Such movements often threaten manmade structures [1, 2]. Additional information about landslide activity, depth of slip surfaces and the geological environment were collected concurrently with the design of remedial actions. The finite element method (FEM) was used to study interaction effects between two walls and the effect of an amount of sliding soil mass on resultant earth pressures and anchor forces essential for the structural design of elements in the whole system
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