Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

A 26 m deep excavation in hard sandy clays for the Halandri Station of the Stavros Extension of Athens Metro was completed in 2001. The excavation supporting system and the areas outside the excavation were instrumented. During the design, a finite element analysis of stresses and displacements was performed using soil parameters developed from laboratory and in-situ testing. The measured displacements had a similar distribution with depth as the calculated displacements, but were significantly smaller. An extensive finite element back-analysis was performed, in which the input parameters were varied until the magnitude and the distribution with depth of calculated displacements agreed as closely as practicable with the measured displacements. Comparison was made with displacements measured at other Stavros Extension deep excavations in similar soil. The soil parameters established from the back-analysis can be considered applicable to the design of planned further Athens Metro extensions located in similar type of soil.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Deep Excavations in Hard Sandy Clays for Stations and Shafts of the Athens Metro Stavros Extension

Arlington, Virginia

A 26 m deep excavation in hard sandy clays for the Halandri Station of the Stavros Extension of Athens Metro was completed in 2001. The excavation supporting system and the areas outside the excavation were instrumented. During the design, a finite element analysis of stresses and displacements was performed using soil parameters developed from laboratory and in-situ testing. The measured displacements had a similar distribution with depth as the calculated displacements, but were significantly smaller. An extensive finite element back-analysis was performed, in which the input parameters were varied until the magnitude and the distribution with depth of calculated displacements agreed as closely as practicable with the measured displacements. Comparison was made with displacements measured at other Stavros Extension deep excavations in similar soil. The soil parameters established from the back-analysis can be considered applicable to the design of planned further Athens Metro extensions located in similar type of soil.