Eighth International Conference on Case Histories in Geotechnical Engineering
Ultimate Limit State Design Using FEM and Advanced Soil Model—A Case History of a 30 m Deep Excavation in London
Publication: Geo-Congress 2019: Earth Retaining Structures and Geosynthetics (GSP 306)
ABSTRACT
Construction of the Western Ticket Hall at Tottenham Court Road Station (Crossrail, London, U.K.) was a critical path activity in order to prepare the underground space for the arrival of two tunnel boring machines. This has led to the implementation of the observational method design to eliminate the lowest level of temporary propping, resulting in a 13 m prop-free excavation at the bottom of the 30 m deep diaphragm wall station box. The work had led to extensive monitoring of the excavation and the retaining wall measured data is presented in this paper and used to back analyse the most probable geotechnical parameters using the hardening small strain soil model in the Plaxis finite element software. The design of this retaining structure is also used to assess the implications of the ultimate limit state design approach adopted in the U.K. under Eurocode 7 for geotechnical design using finite element method and advanced constitutive soil models.
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REFERENCES
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Information & Authors
Information
Published In
Geo-Congress 2019: Earth Retaining Structures and Geosynthetics (GSP 306)
Pages: 68 - 81
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8208-7
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
Published in print: Mar 21, 2019
ASCE Technical Topics:
- Case studies
- Construction engineering
- Construction equipment
- Construction methods
- Design (by type)
- Engineering fundamentals
- Equipment and machinery
- Excavation
- Finite element method
- Geotechnical engineering
- Highway and road design
- Limit states
- Methodology (by type)
- Numerical methods
- Research methods (by type)
- Retaining structures
- Special condition construction
- Structural design
- Underground construction
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