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  • Animateur: Heinz Ehrbar (Switzerland)
  • Vice-Animateur: Robert Galler (Austria)
  • Tutor: Markus Thewes (Germany)
  • Report presented by Heinz Ehrbar.

The meeting on Sunday gathered 14 delegates from 11 nations and on Monday 11 delegates from 10 nations.

The WG publications (existing and planned) are:

Title Year of publication
1 Conventional Tunnelling - General Report of the ITA WG 19 19 Published in 2009
2 Guidelines on Special Aspects in Contracts for Conventional Tunnelling Planned in 2012/2013
3 Guidelines on the selection of excavation methods (together with WG 14) Planned in 2014 (?)
4 Guidelines on Monitoring in Conventional Tunnelling After 2014?

Aim of the meeting in 2012

  • Final step forward in the elaboration of the guidelines on special contractual aspects
  • Future activities of WG 19
  • Working schedule 2012/2013

Presentations

  • Austrian guidelines on monitoring in conventional tunnelling, by Österreichische Gesellschaft für Geomechanik
  • Mechanisation in Conventional Tunnelling, by Swiss tunnel holding
  • "Guidelines on contractual aspects of conventional tunnelling" (4th draft), May 18, 2012, WG 19 ITA Report.
    Contents:
    • Introduction
    • 1 Procedures and Responsibilities
    • 2 Construction Contract
    • 3 Time Schedule
    • 4 Risk Allocation
    • 5 Resources
    • 6 Payment
    • 6.1 Structure of the bill of quantities
    • 6.2 Excavation and support
    • 6.2.1 Excavation
    • 6.2.2 Support
    • 6.2.3 Overbreak
    • 6.3 Compensation for hindrances
    • 6.4 Time dependent costs
    • 6.5 Auxiliary measures
    • 7 Conclusions
    • 8 References

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Next project in close collaboration with WG 14:
"Guidelines on the selection of excavation methods"

Planned activities