fundamentals of intelligent compaction
DESCRIPTION
It describes the fundamentals of intelligent compaction, including equipment, measurement system, software, and etc.TRANSCRIPT
FHWA Intelligent Compaction National Workshop
May 3, 2012 Minneapolis, MN
Session No. 3 Fundamentals of
Intelligent Compaction
By George Chang Transtec Group
Outlines
• IC Definition • IC Roller Systems • Correlation Tests • GPS • IC Data Maps
Intelligent Compaction
Continuous Measurement System
Global Positioning
System (GPS)
Onboard Report System
Courtesy of Bomag
Single Drum IC Rollers
Bomag
Caterpillar Ammann-Case
Dynapac Sakai
HAMM-Wirtgen
Retrofit Single Drum IC Roller Volvo with Trimble Retrofit
Double Drum IC Rollers Bomag
Caterpillar Sakai
HAMM-Wirtgen
Retrofit Double Drum IC Roller Conventional Roller with Trimble Retrofit
Printer
Control Box GNSS Receiver
Temperature Sensor
Temperature Sensor
Courtesy of Trimble
Caterpillar Soils IC System GPS
Receiver Radio
Slope Sensor Accelerometer
Controllers
Display
Courtesy of Caterpillar
Sakai Double Drum IC System
Temperature Sensor
GPS Radio/Receiver
Control Panel
Accelerometer CIS Display
HAMM Double Drum IC System
Accelerometer
GPS Receiver
HCQ GPS Navigator
Temperature Sensors Control Panel
Caterpillar CMV, MDP
Dynapac CMV
Bomag EVIB
Sakai CCV
Ammann kb
Roller Measurement Values
HAMM/Wirtgen HMV
Compaction Meter Value CMV
modified from Thurner and Sandström 1980
Ω
Ω⋅=AA
C CMV 2
Compaction Control Value CCV
Courtesy of Sakai
Roller Integrated Stiffness Kb
zd
csks
mf
ksuspcsusp
fe(t)
zf
Equivalent frame weight
Suspension stiffnessand damping
Drum weightand dynamicforce generated
Soil stiffnessand damping
md
Fs
Courtesy of Ammann
Vibration Modulus Evib
Courtesy of Bomag
De-Coupled - Layer Moduli
Courtesy of Bomag
Machine Drive Power MDP
)MDP(37.1150MDP80 −=
)MDP(75.2150MDP40 −=
Scaled Values
Ammann Auto-Feedback
Courtesy of Ammann
Bomag Auto-Feedback
Courtesy of Bomag
Correlation with In-Situ Testing
Courtesy of David White
In-Situ Tests for Soils/Subbase LWD
FWD
DCP NDG
PLT DSPA BCD
Soils Density vs. Modulus
Courtesy of Prof. Briaud
In-Situ Tests for HMA NG
PSPA
NNG
LWD-a
100 % Coverage
1 / 1,000,000
Courtesy of Trimble/Caterpillar
Sampling Coverage
ICMV vs LWD Sakai CCV
LWD
GPS Measurements
GPS location: 37o 23.323’ N
122o 02.162’ W
Space Segment
Control Segment
User Segment Courtesy of Trimble
GPS Precisions • Autonomous:10 -15m • DGPS: 0.5 - 5m • Float : 1 m • Fixed :1-3 cm
Courtesy of Trimble
Not to scale
GPS Accuracy for IC
Unspecified Source
1 2 3 4
IC Pass
Counts
Poor GPS Good GPS
GPS Planning - DOP
Courtesy of Trimble
GPS Plane Projection
• From Curved Earth Surface to Flat Maps
Longitude Latitudes
Easting Northing Elevation
Courtesy of Franson/CoordTrans
US UTM Zones
State Plane Coordinate System
Courtesy of PennState U.
RTK GPS
Connected by Radio Link
GPS Base Station GPS Rover
Roller GPS Radio/Receiver
Virtual Base Station System
OmniSTAR HP Subscription
GPS Onsite Verification
GPS Rovers for Point Tests
TopCon OmniSTAR Trimble
Point Tests and IC Data
Caterpillar Soils IC System
Courtesy of Caterpillar
HAMM Asphalt HCQ System
Courtesy of HAMM/Wirtgen
