Dike stabilisation under uplift conditions using stabilisation columns

A study on the technical potential of stabilisation columns for improving inner slope stability under uplift conditions

Master thesis (2020)

Authors

P.C. van de Stroet Civil Engineering & Geosciences

Contributors

Sebastiaan N. Jonkman Hydraulic Structures and Flood Risk - CEG (supervisor 1)
Kenneth Gavin Geo-engineering - CEG (supervisor 2)
M.G. van der Krogt Hydraulic Structures and Flood Risk - CEG (coach)
Ben Rijneveld Fugro (coach)
Faculty
Civil Engineering & Geosciences
Copyright: © 2020 Peter van de Stroet
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Published Date

10-06-2020

Language

English

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Faculty

Civil Engineering & Geosciences

Abstract

The low lying areas in the Netherlands often consist of soft and low permeable soils like clay and peat on top of a sand layer. Due to high water pressures at the interface between the permeable sand layer and the low permeable top layers, the effective stresses decrease, which can cause lifting of the low permeable top layers. As a consequence a deep seated long slip surface of the inward dike face can occur. Classical solutions to improve inner slope stability, like decreasing the inner slope or creating a stabilisation berm, are space consuming. Stabilisation columns are expected to improve the inner slope stability within the actual footprint. Various effects of stabilisation columns on inner slope stability are studied. The effects are studied by means of PLAXIS calculations using various modelling techniques.