Long term behaviour of temporary prestressed an-chors - 'Keramikos' underground car park station

摘要

This paper focuses on the long term behavior of temporary prestressed anchors of an existing temporary retaining structure. The scope of the initial project in 1995 was to construct "Keramikos" underground station of Line 3 Athens Metro. In 2007 ATTIKO METRO S.A. had the responsibility to construct within the existing excavation, a new five storey underground car park. The main distinctiveness of the particular project was that for the first time in Greece a temporary retaining structure of a deep excavation active for almost 13 years, being subjected to different loading conditions, had to be used again under submerged conditions. The recorded actual behavior of the retaining structure showed that the global remaining temporary anchor strength was quite significant.