Experimental research of pore water pressure fluctuation on the stability of submarine slopes

A case study of the Eastern Scheldt storm surge barrier

Master thesis (2019)

Authors

F.G.H. Steijlen Civil Engineering & Geosciences

Contributors

A. Askarinejad Geo-engineering - CEG (supervisor 1)
A. Maghsoudloo Geo-engineering - CEG (supervisor 1)
M.A. Hicks Geo-engineering - CEG (supervisor 2)
R.J. Labeur Environmental Fluid Mechanics - CEG (supervisor 2)
Hans Janssen Rijkswaterstaat (supervisor 2)
Stefan van den Berg Rijkswaterstaat (supervisor 2)
Faculty
Civil Engineering & Geosciences
Copyright: © 2019 Florentine Steijlen
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Published Date

16-12-2019

Language

English

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Faculty

Civil Engineering & Geosciences

Abstract

In this report, an experimental investigation of the influence of currents on submarine slope stability is presented for the Eastern Scheldt storm surge barrier case. Slope instabilities, including liquefaction failures, have been observed in the scour hole slopes near this barrier. The currents above the sloping bed are expected to initiate the liquefaction slope failures. The effects of the excess pore water pressure increase, that is generated by the currents, on the soil response are investigated by triaxial tests. Multiple excess pore water pressure rates are applied on a loose soil sample. The triaxial tests show that higher excess pore water pressure rates result in earlier developments of strains at lower stress ratios. This research is intended as a step towards a better understanding of the initiation mechanism of the liquefaction slope failures near the barrier.