Site investigations and convergence measurements for a twin metro tunnel driven in Ankara clay, Turkey
Date
2006
Authors
Ozsan, A.
Karakus, M.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Pre-Congress Proceedings of the 10th IAEG International Congress, IAEG2006, held in Nottingham, United Kingdom from 6th to 10th September 2006
Statement of Responsibility
Aydin Ozsan and Murat Karakus
Conference Name
IAEG International Congress 2006 (10th : 2006 : Nottingham)
Abstract
Over population and increase in the traffic congestion in urban areas have led to an inevitable rise in the construction of underground structures. Therefore, a project consisting of 9325m twin metro tunnel construction has been planned by the Greater Municipality of Ankara in order to help to ease transportation problems in Ankara, Turkey. This paper presents the geotechnical properties along the tunnel route, and construction of the Middle East Technical University (METU) twin metro tunnel between 2.720 and 4.000 km as a part of Ankara project III. The twin metro tunnel runs mainly through Ankara Clay above this is artificial fill material. Each tunnel has approximately 38 m2 cross-sectional area and is excavated in two stages in accordance with New Austrian Tunnelling Method (NATM). There have been several drilling holes conducted to investigate groundwater levels and engineering properties of the host medium; these will be examined in the paper. In order to monitor the amount of tunnel closure, convergence measurements taken during construction of the tunnel will be presented and discussed.
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Dissertation Note
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Description
© The Geological Society of London 2006 10th Congress of the International Association for Engineering Geology and the Environment – Engineering geology for tomorrow’s cities