Post on 13-Mar-2018
transcript
Highspeed Rail Challenges g p gon
The Northeast Corridor
Frank VaccaMay 4, 2011
HSR P
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT
HSR Practicum
North American Differences to Consider
•NEC Operating Characteristics•NEC Operating Characteristics
•Regulatory Environment
•Axle Loads/Impact Loads
•Vehicle/Track Interaction Issues (VTI)Vehicle/Track Interaction Issues (VTI)
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT 2
Not Too DifferentNot Too Different
•Catenary•Catenary
• Structures I L do Impact Leads
• Signalso Broken Rail Protectiono Positive Train Control
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT 3
Northeast CorridorNortheast Corridor
•Mixed Traffic UseMixed Traffic Useo Impact Loadingo Maintenance Window Conflictso Mai te a ce Wi dow Co icts
•Corridor Configurationo Interlocking Spacingo Interlocking Spacingo Number of Wayside TO’s
A f ROW dA•Age of ROW and Assetso Curves/GradesS b d d B ll t C diti
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o Sub‐grade and Ballast Conditions
Commuter TrainsHighSpeed & RegionalHighSpeed & Regional
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Regulatoryegu a o y
•Positive Train Control• Positive Train Control
•Roadway Worker Protection
•Track/Structures and Signal Standards
•Crash WorthinessCrash Worthiness
•Rule of Particular Applicability
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Axle Loads•NEC is a Mixed Traffic environment
•Amtrak uses six Wheel Impact Load Detector (WILD) sites to control axle loads and impactsp
• 286,000 pound freight axle loads permitted
Th t ti l d i t i h h i•The static load environment is much heavier than HSR abroad
•Higher speeds result in shock damage to IJs, joints and other special track work
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Average Vertical LoadsE INEC WILD Sites
60
40
50
34 MPH 114 MPH 140 MPH 74 MPH
30
40
DynamicWheel Load
Statich l d
10
20 Wheel Load
0
Empty Freight Loaded Freight Acela Acela Comm
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Peak Vertical Loads NEC WILD Sites
140
100
120 34 MPH 200 MPH 114 MPH 140 MPH 74 MPH
60
80PeakWheel Load
St ti
20
40
StaticWheel Load
0
EmptyFreight
LoadedFreight
Europeanlimit
Acela Acela Comm
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT 11
g g
VTI IssuesVTI Issues
•How Rolling Stock Behaves on a Segment of•How Rolling Stock Behaves on a Segment of Tracko Ride QualityQ yo Wheel & Rail Maintenanceo Truck Hunting
•Defectso Combination of Profile and Alignmento Combination of Profile and Alignmento Short & Long Warps
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT 12
Raw Geometry Car Data from VTI blProblem Site
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Filtered Data from VTI Problem SiteHarmonics
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North American Highspeed RailNorth American Highspeed Rail
•Regulatory Environment = Adaptation•Regulatory Environment Adaptation
• Impact Loads = Greater Maintenance
•VTI Issues = Greater concern for mixed traffic/operating characteristics/passenger ride
fcomfort
•NEC = Complexity in meeting everyone’s expectations for rail
Engineering THE TRAVEL SOLUTION FOR OUR TIME: COMMUNITY ~ MOBILITY ~ ENVIRONMENT 15