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Implementation of a Grinding Simulation Tool in the Profile Viewing and Analysis (ProVAL) Software Tool
•George Chang, PhD, PEGeorge Chang, PhD, PE
•Transtec GroupTranstec Group
•Project ManagerProject Manager
•[email protected] @theTranstecGroup.com
T H ETRANSTEC GROUPTHE
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Presentation Outlines
o Smoothness vs. Rideo Hot Spot and Should-Grind
Locatoro Grinding Simulation in
ProVAL o Smoothness Assurance
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Rolling Straightedge
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Modern Profilograph
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Manual Trace Reduction
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Profilograph Responses
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Profilograph Response
0
0.5
1.0
1.5
2.0Gain
Wavelength (ft)1000100101
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Profilograph Output
Profilograph output can be used to:1. Estimate smoothness.2. Determine a grinding strategy.3. Help improve construction practice for smoothness.
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Profilograph Output
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Profilers
0
0.5
1.0
1.5
2.0Gain
Wavelength (ft)1000100101
Profilograph
Profiler
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International Roughness Index
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Smoothness Assurance ModuleIRI Sensitivity
1 10 100Wavelength (ft)
0
.5
1
1.5
2IRI Response
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Ohio Turnpike Third Lane
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Profiler Output
3 4 0 0 3 6 0 0 3 8 0 0 4 0 0 0 4 2 0 0 4 4 0 0 4 6 0 0D i s t a n c e ( f t )
- .6
E l e v a t io n ( in )
0
.6
Profiler output can be used to:1. Estimate ride quality.2. Determine a grinding strategy.3. Help improve construction practice for ride.
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Elevation Profile
1000 1100 1200 1300 1400 1500Distance (ft)
-.2
-.1
0
.1
.2Left E levation (in)
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IRI Filter Response
Distance (ft)1000 1100 1200 1300 1400 1500
-200
-100
0
100
200HRI Filter Output (in/m i)
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Rectified Response
1000 1100 1200 1300 1400 1500Distance (ft)
0
50
100
150
200Rectified Filter Output (in/mi)
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Fixed Interval Report Start(ft) End(ft) HRI(in/mi) 0 500 39.8 500 1000 29.7 1000 1500 42.0 1500 2000 40.1 2000 2500 36.2 2500 3000 41.6 3000 3500 48.5 3500 4000 51.0 4000 4500 44.0 4500 5000 45.5
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Continuous Roughness Report
0 1000 2000 3000 4000 5000Distance (ft)
20
30
40
50
60Roughness Profile (in/m i)
500-ft Baselength
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Job SummaryLow IRI High IRI Percentage (in/mi) (in/mi) 0 10 0.0 10 20 0.0 20 30 8.3 30 40 35.4 40 50 40.5 50 60 15.8 60 70 0.0 70 80 0.0 80 90 0.0 90 100 0.0
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Short Interval Report
3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)
20
40
60
80
100R oughness Profile (in/m i)
100-foot B aselength
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Hot Spot Locations
Segment Start Segment End Peak HRI (ft) (ft) (in/mi) 3201 3274 64.6 3276 3280 60.3 3925 4123 76.5 4495 4583 85.9
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18-foot Grinder
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Grinding Simulation
3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)
20
40
60
80
100Roughness Profile (in/m i)
100-foot Baselength
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Optimal Grinding Strategy
Grind Start Grind End HRI Change Max. Depth (ft) (ft) (in/mi) (in) 3945 3990 4.8 0.36 4058 4093 5.4 0.33 4473 4587 6.1 0.16
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Validation Report
3600 3800 4000 4200 4400 4600 4800 5000Distance (ft)
20
40
60
80
100Roughness Profile (in/mi)
100-foot Baselength
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What is ProVAL?
o ProVAL is an engineering software application that allows users to view and analyze pavement profiles in many different ways.
o ProVAL is a FHWA product with continuous improvements.
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1.0
2.0
2.5
2001 2002 2003 2006 200720052004 2008
History of ProVAL Releases
2.6
2009
2.7
2.73
3.0*
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Smoothness Assurance Module (SAM)
• Uses Profilers rather than Profilographs
• Allows a choice of an index
• Makes continuous reporting possible
• Includes both short and long interval criteria
• Produces a grinding simulation
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25-foot Grinder
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Grinder Setup
Head Position = Lf / Wheel Base
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Grinder Setup
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Grinding Simulation Setup
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Acknowledgement
o US FHWA Sponsorshipo Co-authors:
• Steven M. Karamihas, University of Michigan, USA• Robert Otto Rasmussen, P.E., Ph.D., The Transtec Group,
Inc., USA• Mark Swanlund, P.E., US DOT Federal Highway
Administration, USA• Robert Orthmeyer, P.E., US DOT Federal Highway
Administration, USA
o US Profile Pooled Fund States
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ProVAL Website
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www.RoadProfile.com