From geology to spatial models for simulations and TBM’s
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Transcript of From geology to spatial models for simulations and TBM’s
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 1 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
From geology to spatial models for simulations and TBM’s
George Exadaktylos Laboratory of Mining Engineering Design, Greece
Maria StavropoulouUOA, Greece
We aim at the transformation of the conceptual qualitative geological model (left) to the spatial model of each parameter needed either by the numerical model or the tunnel excavation machine (right) or for risk analysis or visualization
Objectives
“underground construction environment model”
Also for visualization by the publicAlso for visualization by the public
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 2 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Developed concepts & IT tools for this transformation
Exploitation
1. The concept and tool of the web-driven, relational rock mechanics database (RMDB) that could become an add-on database of any numerical code for rock parameters selection by modeler. Applicability of RMDB has been extended to the rock masses by using the concept of the “Damage Mechanics”. These developments should be contrasted for example with PHASES-RockLab tools developed by the Rockscience group. Extended for soil mechanics applications (standardization of rock and soil mechanical testing)
2. The new Geostatistics package KRIGSTAT for 1D, 2D & 3D spatial analysis and interpolation through kriging (co-kriging) or simulation of geotechnical parameters inside each geological formation with evaluation of uncertainty of predictions. This software could be combined with the concept of “Discretized geological modeling” developed to feed directly numerical simulation tools, as well as Risk Analysis & Reliability Analysis software.
3. The new CUTTING_CALC software for excavation performance analysis & optimization of TBM’s & Roadheaders. The concept of transformation of “geological model” into “machine performance model”.
-The new software KRIGSTAT may be a stand-alone application or add-on of a commercial numerical code or risk analysis software.-CUTTING_CALC code may be add-on of tunneling machines or for work nearly real-time in the office.-The RMDB could be also exploited to become a useful tool for selecting rock mechanical parameters at the pre-design & design stages of an underground excavation (combined with numerical software).
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 3 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Case study: Mas-Blau EPB tunnel in soft soil formations
2) Ordinary Kriging2) Ordinary Kriging
3) Annealing (stochastic simulation)3) Annealing (stochastic simulation)
Screenshot of KRIGSTAT codeScreenshot of KRIGSTAT code
1) Indicator Kriging1) Indicator Kriging
20 0
1
( ) ( )n
OK i ii
x x x
4) Prediction error or4) Prediction error or uncertaintyuncertainty
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 4 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
V
PtSE
1
SESE22 (MPa) calculation (MPa) calculation
Traces of knives,Traces of knives,calculate S=10 cmcalculate S=10 cm
pS
F
pS
F
V
FSE s
T
TsTs
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EPB head designEPB head design Knives designKnives design
y = 0.9877x
0
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0 10 20 30 40 50 60 70
SE1 [MPa]
SE
2 [M
Pa]
SE2Linear (SE2)
1) Specific Energy of soil cutting1) Specific Energy of soil cutting
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 5 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Plasticity slip-line analytical model for soil cuttingPlasticity slip-line analytical model for soil cutting
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5500 5550 5600 5650 5700 5750 5800 5850 5900 5950 6000
Chainage, x [m]
Coh
esio
n, c
[kP
a]
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Pro
bab
ility
[%] &
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etra
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m/r
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inverse model estimation from SE
Penetration depth, p
kriging_estimation
Probability being on QL3 layer%
- Undrained conditions during cutting- Undrained conditions during cutting- Undrained pore pressure drop- Undrained pore pressure drop ppbb-p-p00 is very large is very large- SE independent of pSE independent of p00; only function of p; only function of pmm
S
pe
cSE
24tantantan
2tan
1
tan
1
24tan
sin1
cos22tan
tansn FF
1
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fCp
)/4( vD
p
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 6 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Screw conveyor modelScrew conveyor model
0.0
10.0
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5400 5500 5600 5700 5800 5900 6000 6100
Chainage [m]
To
rque
[kN
m]
Series1
Series2
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 7 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Model calibration procedures in the RMDB
UpscalingUpscalingFailure criterionFailure criterion
DamageDamage
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 8 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
RMDB structure & web-application
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 9 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 10 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
main items for modern tunneling are risk reduction for workers and neighbourhood in urban areas, better production rates and less stops due to unexpected events or wear is also of interest, lowering costs and offering the infrastructures earlier to public (reduces social cost).
Ideas on the development of industrial systems for forecasting subsidence and visualisation.- Define and improve types of data adquisition, use of sensor networks, create homogeneous protocols, provide decision making tools.
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 11 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
On the development of the “Cutting Efficiency Mapping System (CEMS)” for
Roadheaders (RH)George Exadaktylos & George Xiroudakis
TUC Laboratory of Mining Engineering Design
Greece
Maria StavropoulouUOA
Greece
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 12 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Objectives- Develop a “Cutting Efficiency Mapping System (CEMS)” using RH logged data and fast analytical algorithms (TUC).- Testing CEMS with the new roadheader prototype (Sandvik-TUC).
Benefits
Exploitation
-Further exploitation of new RH automations such as “Guidance System”, Sandvik – Geodata for continuous monitoring of the position of RH.-Shift by shift monitoring of RH’s performance and ground strength.-Prediction of RH’s performance (energy consumption-advance rate) from geological and rock mechanics test data already at the design phase.
-The new software may be added on the RH for the continuous monitoring of its performance or for rock mass characterization.- Also, the software maybe used for the optimization of excavation efficiency of a RH by selecting the best operational parameters or head design under given geological conditions.
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 13 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Example case study: Montreal, Quebec, Canada metro tunnel
Left: Transformed geological model in kWh/m3 of the Montreal metro case
(Simulation Annealing Module of KRIGSTAT software).
Comparison of lithology (left), SE estimation from geostatistical analysis with KRIGSTAT
& from the analytical formula (middle), and
from registered machine data (right)(SE=Specific Energy in kWh/m3).
11stst ITRUS meeting, ITRUS meeting, Paris 30 June 2009TUC Slide 14 of total 9
Technology Innovation in Underground ConstructionSixth framework program
of the European Union
Developed modeling frameworka. Geostatistical code KRIGSTATb. New analytical performance model for RH (calculation of cutting geometry, cutting forces and specific energy of cutting considering the “size effect”)c. Implementation of analytical relations and part of the geostatistical model in the form of RH’s add-on software
Left fig.: KRIGSTAT Right fig.: Cutting_calc algorithm