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Geosynthetic-Reinforced Slopes in Cohesive Soils Subject to Seismic Action

Lookup NU author(s): Akram (PGR) Abd, Professor Stefano Utili

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

© 2017 The Authors. Currently, geosynthetic reinforcements are calculated assuming the backfill to be purely frictional. However, accounting for the presence of even a modest amount of cohesion may allow using locally available cohesive backfills to a greater extent and less overall reinforcement. Unlike purely frictional backfills, cohesive soils present are subject to the formation of cracks that tend to reduce slope stability which therefore need to be properly accounted for in any slope stability assessment. Utili & Abd [1] derived a semi-analytical method for uniform c-aor1ø slopes accounting for the presence of cracks that provides the amount of reinforcement needed as a function of soil cohesion, tensile strength, angle of shearing resistance and slope inclination employing the limit analysis upper bound method. In this paper the formulation is extended to the seismic case, accounting for earthquake action by employing the pseudo-static approach. Ready to use design charts providing the value of the required reinforcement are plotted for both uniform and linearly increasing reinforcement distributions. From the results it emerges that accounting for the presence of cohesion allows significant savings to be made, but the presence of seismic action may require considerable additional reinforcement.


Publication metadata

Author(s): Abd AH, Utili S

Editor(s): Andrei Petriaev and Anastasia Konon

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Proceedings of the International Scientific Conference Transportation Geotechnics and Geoecology (TGG-2017)

Year of Conference: 2017

Pages: 898-907

Online publication date: 26/05/2017

Acceptance date: 02/04/2016

Date deposited: 06/07/2017

ISSN: 1877-7058

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.proeng.2017.05.140

DOI: 10.1016/j.proeng.2017.05.140

Series Title: Procedia Engineering


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