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GeoConSol
Geotechnical & Tunnel Consultants

A consultant is a universal observer who can look at a problem outside the environment in which the problem came to be, thereby creating a solution that was never possible before.  Fernando Flores

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EXPERT / FORENSIC SERVICES
DIFFERING SITE CONDITIONS
-->DSC Technical Principles
-->DSC Standards for Entitlement
-->DSC Independent Review
-->DSC Case Histories
GEOTECHNICAL / CONSTRUCTION
-->Rock Testing/Boreability
-->Impact Hammer Feasibility
ARTICLES / PUBLICATIONS
TUNNELS / TUNNELING
-->Tunnel Boring
-->Excavation Improvement
-->Microtunneling/Pipe-Jacking
-->Selection of TBMs & MTBMs
-->Forensic Investigations
-->Safety
-->Detection of Covert Tunnels
CLIENTS
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Peter J. Tarkoy
tunnel, boring, machine, failures, problems, TBM, MTBM, consultants, geotechnical

Tunnel Boring Machine
Failures & Problems

  • Component failures (contra Herrenknecht, pro Lovat)

  • Operational & performance failures (contra Herrenknecht, pro Jarva)

  • Assembly Errors (contra Calweld, contra Akkerman) 

  • Mismatched components and defective design (contra Herrenknecht),

  • Loss of line and grade (pro American Auger)

  • Failure of operation and logistics (contra Herrenknecht),

  • Failure to commission (contra Herrenknecht),

  • Liability/responsibility (contra Herrenknecht, pro Lovat, pro Wirth), 

  • Claims by contractor (contra Herrenknecht, pro Wirth), 

  • Impact of differing site conditions on machine performance (contra Herrenknecht, pro Robbins, pro Soltau),

  • Failure to apply rated forces (contra Herrenknecht)

We have served machine manufacturers, contractors, owners, and government agencies.  Our experience includes machines manufactured by Akkerman, American Augers, Boretec, Calweld, Demag, Herrenknecht, Lawrence, Jarva, Lovat, Robbins, Soltau, Wirth.
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