Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

Although one can think that it is very low the probability of a seism occurrence during the execution of an excavation in an urban lot protected by a diaphragm wall curtain, reality shows that whenever a seism occurs in an urban area several diaphragm walls will be affected by it. So it is advisable to consider the seismic action when designing a diaphragm wall curtain. The Eurocodes consider the seismic actions in Eurocode 8 (EC 8) and recommend the use of the Mononobe-Okabe method when dealing with soil retaining structures. The Eurocodes consider the possibility of each European country to adopt their own seismic parameters as the seismic risk is different in each country. Thus the so-called National Document of Application prescribes the seismic local parameters. In Portugal the Portuguese Standard ENV 1998-1-1 considers four seismic zones: A, B, C and D. Zone A is the one of greater seismic risk and includes the Lisbon area and the coastline South of Lisbon down to the Algarve. The paper presents the general approach of diaphragm walls design under EC 8 and the application to the case of a diaphragm wall located at Coimbra, near the local Stadium, with an height of 21,5m and four levels of anchorages, each one with a 1.200kN prestress.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Diaphragm Walls Seismic Design According to the Eurocodes

San Diego, California

Although one can think that it is very low the probability of a seism occurrence during the execution of an excavation in an urban lot protected by a diaphragm wall curtain, reality shows that whenever a seism occurs in an urban area several diaphragm walls will be affected by it. So it is advisable to consider the seismic action when designing a diaphragm wall curtain. The Eurocodes consider the seismic actions in Eurocode 8 (EC 8) and recommend the use of the Mononobe-Okabe method when dealing with soil retaining structures. The Eurocodes consider the possibility of each European country to adopt their own seismic parameters as the seismic risk is different in each country. Thus the so-called National Document of Application prescribes the seismic local parameters. In Portugal the Portuguese Standard ENV 1998-1-1 considers four seismic zones: A, B, C and D. Zone A is the one of greater seismic risk and includes the Lisbon area and the coastline South of Lisbon down to the Algarve. The paper presents the general approach of diaphragm walls design under EC 8 and the application to the case of a diaphragm wall located at Coimbra, near the local Stadium, with an height of 21,5m and four levels of anchorages, each one with a 1.200kN prestress.