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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
-->Case History of a Bogus Expert
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
'improved tunnel boring machine performance, liquidated damages'

Tunnel Boring Machine (TBM) Excavation 
Improve Performance

Factors that control TBM performance are:

  • TBM Penetration Rate (meters/machine hour)

  • TBM Downtime (minutes)

  • TBM Utilization (machine hours/shift hours)

  • Tool Wear (tool changes per shift)

In order to improve Tunnel Boring Machine (TBM) excavation performance it will be necessary to increase the Tunnel Boring Machine (TBM) penetration rate and the Tunnel Boring Machine (TBM) utilization while decreasing Tunnel Boring Machine (TBM) downtime and tool wear.

 

The daily labor rate on a major city tunnel project, can be $100,000/day or moreIf the excavation duration is overrun by 10 working days, the cost will increase by $1,000,000, not to mention liquidated damages.

 

We have produced consistent effective action in improving Tunnel Boring Machine (TBM) excavation productivity over the last 40 years.

 

Your daily labor rates may not be as high as in a major city, however, if you wish to improve your Tunnel Boring Machine (TBM) productivity, we may be contacted as follows:

 

Telephone:  +1-508-650-3600

e-mail:           Productivity@GeoConSol.com

Skype:           PeterJTarkoy

 

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