Working Groups

Animator: Chung Sik Yoo (South Korea)
Vice-Animator: Elena Chiriotti (France)
Tutor: Eric Leca (France)
 
Two meetings held in Dubrovnik on May 24th & 25th
 
26 participants from 14 countries: Austrailia (1), Austria (1), Belgium (2), Brazil (1), China (1), Colombia (1), Korea (1), Spain (1), France (3), Germany (2), Italy (3), Japan (1), Sweden (2), Poland (1), UK (1), USA (5)

Ongoing activities

  • Face Support Pressure Calculations in Shield Tunnelling
  • Fiber Reinforced Cast Concrete For Tunnel Lining
  • Risk Assessment
  • Stress Measurement and Hydraulic Fracturing
  • Damages of Segmental Lining

Agenda

  • Review of ‘Fiber Reinforced Concrete Tunnel Linings’
  • Review of ‘Face Support Pressure Calulations in Shield Tunnelling’
  • Developement of Action Items and Plans for the recommendations on
    • Risk Management
    • Stress Measurement and Hydraulic Fracturing
    • Damages of Segmental Lining
  • Developement of future items

Face Support Pressure Calculations in Shield Tunnelling

  • Review of draft recommendation
  • Input by group members
    • Long overdue document
    • Re-structuring of document
    • Consider user perspective
    • Case histories
  • Internal review by subgroup by end of June of 2015
  • Revision by the end of August for WG2 group reivew
  • Final draft: end of 2015 for ExCo review

Fiber Reinforced Concrete Lining

  • Review of draft recommendation
  • Input by group members
  • Internal review by the end of July of 2015
  • ITAtech review by September of 2015
  • Final draft by end of 2015 for ExCo review

Risk Management

  • Review of 2004 ITA Risk Management Document
    • Internal review of Tables and glossary by September 2015
    • External review by specialists by September 2015
    • Coherence with ISO 31000
  • Feedback from questionnaire and interviews
    • Interviewees identified (insurers, owners, engineers, contractors, machine suppliers, financiers)
    • Review of draft questionnaire
      • Identified several items to be added in the questionnaire
      • WG2 subgroup to revise the questionnaire for distribution to the WG2 members by the end of June 2015
      • Subgroup to review the necessity for interviews
      • Report of the results by the end of December 2015
    • Request for funds to ExCo
      • Preparation of the questionnaire by professionals
  • Application Guide Document
    • To provide how to correctly apply the risk management
    • Contractual use of risk management (conventional vs. other contracts)
    • Quantitative risk management analysis
    • Outline of the documents by the end of September 2015
    • Liaison with WG3

Stress Measurement and Hydraulic Fracturing

  • Scope of the document
    • To cover all types of stress measurement methods
  • Collection of references and case histories by September 2015
  • First draft by March 2016

Damage of Segmental Lining

  • Scope of the document
    • Case histories of segmental lining defects
    • Classification of damages; potential causes; attention points
    • Survey on damage
  • Outline of the documents by July
  • Report the survey results and outline of contents during the WTC2016 meeting

Future Activities

  • Tunnelling-Induced Building and Utility Damage
    • Collection of existing guidelines
    • Need to add guideline for buildings on pile foundation
    • Review of the ITA settlement guideline to investigate the need for update
    • Report the outline and possibly first draft during the WTC2016 meeting
  • Design of Segmental Lining
    • Need to avoid overlap by ITAtech
    • First draft by end of September 2015
  • Selection criteria for geophysical exploration methods
  • Italian case studies on the utility of in situ surveys in tunnelling design