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Geotechnical and Geological Engineering

, Volume 32, Issue 6, pp 1451–1466 | Cite as

Athens Metro Line 3: Complex Tunnel Geometries

  • S. Schina
  • A. Charalampidou
Original paper

Abstract

Complex tunnel geometries are very common during the design of urban tunnelling and especially metro lines. Relevant complexities were common during the construction of Athens Metro in Greece, where the need of giving access to trumpet areas, multi-storey underground constructions and transition zones produces special design requirements. Characteristic case histories are the trumpet area as well as the access gallery and chamber to Egaleo Station in the same extension, which are presented in the paper. In both cases, the real challenge was to give solution to underground complex constructions within short lengths of different tunnel profiles. In the first case, a triple-track tunnel splits to a single and a double-track one, while on the second one, a three-storey access gallery was constructed at the north side of Egaleo Station in order to give access for the construction of the station. According to the geology in the area, the Athenian schist was expected, completely weathered on the top and from low to medium strength deeper. The main criteria of the design was to result to a construction methodology such as to assure stability, low surface settlements and convergences, safety, quality and construction advance, within a realistic solution to the constructor. In both cases, the conventional tunnelling method was applied with success, not only regarding the final surface settlements which proved to be small, but also the speed and the convenience in applying on site the designed procedure.

Keywords

Urban tunnelling Complex geometries Construction sequence Finite difference analysis 

Notes

Acknowledgments

“Attiko Metro” S.A. was the supervising authority responsible for the design and construction of the Athens Metro Project. AKTOR S.A.-IMPREGILO S.P.A. consortium was the contractor for the construction of the Western Extension of Line 3 from Assomaton Shaft to Egaleo Station. The design was performed by “OTM S.A.” Engineering Consulting Company.

References

  1. Anagnostopoulos A et al (eds) (2011) Proceedings of the 15th European conference on soil mechanics and geotechnical engineering. IOS Press, AmsterdamGoogle Scholar
  2. Attewell PB, Yeates J (1984) Tunneling in soil. Ground movements and their effects on structures. In: Attewell PB, Taylor RK (eds) Surrey University PressGoogle Scholar
  3. Coetzee M et al (1998) FLAC basics. Itasca Consulting Group, Inc. Construction, MinneapolisGoogle Scholar
  4. Davis et al (1980) The stability of shallow tunnels and underground openings in cohesive material. Geotechnique 30(4):397–416CrossRefGoogle Scholar
  5. Hoek E (1999) A discussion on acceptability criteria for temporary support and final linings of large span transportation tunnels in poor rock. In: Proceedings of Egnatia Odos S.A, Conference, GreeceGoogle Scholar
  6. Hoek E, Brown ET (1980) Underground excavations in rock. Instn Min. Metall, LondonGoogle Scholar
  7. Kavvadas M (1999) Experiences from the construction of the Athens Metro Project. In: Proceedings of the 12th European conference of soil mechanics and geotechnical engineering, Amsterdam, vol 3, pp 1665–1676Google Scholar
  8. Kolymbas D (2003) Advances in geotechnical engineering and tunnelling. Rational Tunnelling, Summerschool, InnsbruckGoogle Scholar
  9. Mair R, Taylor RN (1997) Bored tunneling in the urban environment. In: Theme Lecture, Plenary Session 4, Proceedings of 14th international conference SMFE, Hamburg, Germany, 1997, vol. 4Google Scholar
  10. Oteo CS, Sagaseta C (1982) Prediction of settlements due to underground openings. In: Dungar R, Pande GN, Studer JA (eds) Numerical models in geomechanics. Zurich, SwitzerlandGoogle Scholar
  11. Panet M (1979) Time-dependent deformations in underground works. In: Proceedings of the 4th ISRM Congress (Montreux), vol 3, pp 279–289Google Scholar
  12. Panet M (1997) Understanding deformations in tunnels. In: Hudson JA (ed) Comprehensive rock engineering, vol 1. Pergamon, Oxford, pp 663–690Google Scholar
  13. Sakurai S (1983) Displacement measurements associated with the design of underground openings. In: Proceedings of international symposium field measurements in geomechanics, Zurich vol 2, pp 1163–1178Google Scholar
  14. Wang Y (1996) Ground response of a circular tunnel in poorly consolidated rock. ASCE J Geotech Eng 26(2):137–163Google Scholar

Copyright information

© The authors and IOS Press, All rights reserved.* 2011

Authors and Affiliations

  1. 1.O.T.M. SA Engineering Consulting CompanyAthensGreece

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