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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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A-Misrepresentations
B-Type 1 or 2?
C-Jacked Pipe Failure
D-Top of Rock
E-PI Litigation Support
F-Geotech Assessment
G-Microtunneling Hard/Soft
H-Machine Failure
I-Boulders-Tunnel Boring
J-Boulders-Microtunneling
K-Plowing Utilities
L-Rock Socket Overrun
M-Bored Tunnel Inflow
N-Rock Comminution
O-Sub-Std TBM Performance
P-Bored Tunnel-Shear Zone
Q-Disputes Resolution
R-Problem Proj. Completion
S-Bored Tunnel Overbreak
T-Auger Sampling Problems
U-Bored Tunnel Delay
V-Hoe Ram - Failure to Rely
Peter J. Tarkoy
substandard, TBM, performance, differing, site, condition, consulting

Sub-Standard TBM Performance
---on behalf of contractor---

Despite an acknowledged differing site condition by owner, the performance of two EPB TBMs performed far below predictions and according to purported TBM forces acting on the rock.  

In effect, the penetration rate was reduced by more than 25% as a consequence of the manufacturer's artificial limitation of thrust. 

Prior to completion of our investigation of the sub-standard performance on behalf of the contractor, the parties settled

RESOLVED FOR THE BENEFIT OF CONTRACTOR

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