Katsigiannis, G, Schweiger, HF, Ferreira, P et al. (1 more author) (2015) Design of Deep Supported Excavations: Comparison Between Numerical and Empirical Methods. In: Schweckendiek, T, van Tol, AF, Pereboom, D, van Staveren, MT and Cools, PMCBM, (eds.) Geotechnical Safety and Risk V. ISGSR 2015: 5th International Symposium on Geotechnical Safety and Risk, 13-16 Oct 2015, Rotterdam, Netherlands. IOS Press , pp. 482-488. ISBN 978-1-61499-579-1
Abstract
This paper focuses on the derivation of design prop loads for supported excavations in stiff clay with increasing excavation depth and number of prop levels. For multi-propped walls there are a number of empirical graphs to obtain the design prop forces. CIRIA C517 (Twine & Roscoe, 1999) enhancing Terzaghi & Peck's work (Terzaghi & Peck (1967) and Peck (1969)) and making it more relevant in the UK practice, suggests the Distributed Prop Load (DPL) method based on 81 case histories and field measurements of prop loads. Similar guidance and empirical graphs exist in other countries such as the EAB Recommendations in Germany (Recommendations on Excavations: EAB, 3rd Edition, 2014). The design prop loads derived by empirical graphs (both CIRIA and EAB which are widely used in the UK and Germany respectively) and Finite Element methods are compared in the context of Eurocode 7 requirements. The German recommendations give prop loads in better agreement with the numerical analysis results. Suggestions are made to update the CIRIA guidance in line with the German recommendations and give different shapes of pressure distribution for supported walls with different number of prop levels. This can result in more realistic predictions of prop loads for upper layers, particularly in deep excavations, and hence more economic design.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 The authors and IOS Press. This article is published online with Open Access by IOS Press and distributed under the terms of the Creative Commons Attribution Non-Commercial License To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/3.0/. |
Keywords: | Eurocode 7; CIRIA C517; props; numerical analysis; design |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Jan 2016 15:44 |
Last Modified: | 23 Jun 2023 21:57 |
Status: | Published |
Publisher: | IOS Press |
Identification Number: | 10.3233/978-1-61499-580-7-482 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93788 |