aashto-fhwa technology endorsement construction...
TRANSCRIPT
Construction Analysis for Pavement Rehabilitation Strategies
for AASHTO Subcommittee on Construction
Aug 5, 2009
Dr. E.B. Lee
University of California at BerkeleyInstitute of Transportation Studies
AASHTO-FHWA Technology Endorsement
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CA4PRS, Tool for Highway RenewalCA4PRS, Tool for Highway RenewalCA4PRS, Tool for Highway Renewal
• Highways Renewal for Sustainability– State & Interstates highways reached their design life– DOTs shift their focus to highway sustainability (4-R)
• Work-zone Impacts and Mitigation– Adverse Impact: Mobility (12%) and Safety (40,000)– FHWA 2008 Regulation: WZ Assessment and TMP
• CA4PRS Software: WZ Evaluation Tool– Pooled-fund (CA, FL, MN, TX, WA): UC Berkeley 2003– AASHTO Promotion (CAST: WZ Traffic Tools)– FHWA Outreach
• 2009 Market-ready Innovation and Technology Product• Arranged Group-License (Free) for all 50 State DOTs• User Trainings: 1,000 Engineers in 20 states
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CA4PRS Nation-wide Promotion (FHWA-AASHTO)CA4PRS NationCA4PRS Nation--wide Promotion (FHWAwide Promotion (FHWA--AASHTO)AASHTO)
Hands-on training workshops1,000 engineers: Caltrans + 20 DOTs
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CA4PRS Alternatives Comparison ProcessCA4PRS Alternatives Comparison ProcessCA4PRS Alternatives Comparison Process
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CA4PRS Alternatives (What-if) ComparisonCA4PRSCA4PRS Alternatives (WhatAlternatives (What--if) Comparisonif) Comparison• Pavement Type => Loner-life Design
– JPCP, CRCP, Slab- or lane-replacement– Overlay (CSOL), Milling-filling AC, Full-depth AC – Cross-section, Thickness, Mix, Base type
• Work-zone Traffic => Minimum Delay– Construction window: Night-time, Day, Weekend, Continuous– Closure hour sensitivity
• 7-h, 8-h, 9-h closures: Schedule –Traffic - Cost– Lane closure schemes: Full vs Partial closures– WZ capacity, Demand reduction, Detours
• Contractor’s Logistics => Accelerated Construction– Site access and Construction sequence– Constructability (demo/mix): Resource constraints
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Concrete Pavement Cross-sectionsConcrete Pavement CrossConcrete Pavement Cross--sectionssections
(b) Concrete Slab Replacement
CONCRETE 205mm (8")
CTB 102mm (4")
AB 305mm (12")
SG
CONCRETE 305mm (12")
BASE 152mm (6")
AB 152mm (6")
SG
(c) Concrete Slab & Base Reconstruction(a) Milling Filling AC
ORExisting AC Pavement
51 mm
76 mm25 mm
0.5 hour
1 hour0.5 hour
Type C
Type CRAC-O
CA4PRS Compares Cross-section Change Alternatives from SCHEDULE-TRAFFIC-COST
Perspective, as the baseline of LCCA.
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Closure <=> Access <=> ProductionFull Closure for Concurrent MethodClosure <=> Access <=> ProductionClosure <=> Access <=> ProductionFull ClosureFull Closure for for Concurrent MethodConcurrent Method
Mobilization
Demolition Base PavingPCC Paving
Demobilization0.0
0.3
0.5
0.8
1.0
0 12 24 36 48 60 72 hour
prog
ress
(km)
More Closure=>
Better Access=>
Faster Schedule;
Higher Delay
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Closure <=> Access <=> ProductionPartial Closure for Sequential MethodClosure <=> Access <=> ProductionClosure <=> Access <=> ProductionPartial ClosurePartial Closure for for Sequential MethodSequential Method
Mobilization
Demolition Base Paving PCC Paving
Demobilization0.0
0.3
0.5
0.8
1.0
0 12 24 36 48 60 72 hour
prog
ress
(km)
Less Closure=>
Limited Access=>
Slower Schedule
Less Delay
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PCC Slab-Cracking & Excavation MethodPCC Slab Saw-cut & Lift Method
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HMA (AC) Constructability CheckHMA (AC) Constructability CheckHMA (AC) Constructability Check
(Aggregates: Granite)
(Aggregates: Limestone)
Milling Machine Production(Wirtzen W1900 Model)
AC Cooling-time Multi-cool Analysis
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I-15 Devore WZ Capacity: Full-closure Dynamic Lane Configuration Using QCMB
II--15 Devore WZ Capacity: Full15 Devore WZ Capacity: Full--closure closure Dynamic Lane Configuration Using QCMBDynamic Lane Configuration Using QCMB
QCMB Operation VideoQCMB Operation VideoQCMB Operation Video
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I-10 Pomona Concrete (4-h Mix) Project, 2000II--10 Pomona Concrete (410 Pomona Concrete (4--h Mix) Project, 2000h Mix) Project, 2000
1.5 mile PCC slabs Replaced: 55-h Weekend1 x Weekend closure = 40 x 7-h night closures
12 l-m Slab-replacement (Nighttime vs Weekend)
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I-710 Long Beach AC Rehabilitation Project, 2003II--710 Long Beach AC Rehabilitation Project, 2003710 Long Beach AC Rehabilitation Project, 2003
18 lane-mile of Long-life CSOL or FDAC8 x 55-h Weekend Closures (ADT = 120,000)
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I-15 Devore PCC Reconstruction ProjectII--15 Devore PCC Reconstruction Project15 Devore PCC Reconstruction Project
CA4PRS SoftwareDemonstration
• Two truck-lane PCC reconstruction– 3-4 lanes / direction, 120,000 ADT – 10 lane-mile (2.5 mile x 2 lanes x 2 dir) PCCP – 12” JPCP / 6” ACB, using 12-h mix RSC
• CA4PRS analysis: Design=>Construction– Schedule – Traffic – Cost Comparison– Nighttime Closures: 7-h, 8-h, 9-h closures– Extended Closures: 55-h weekend, 3-day weekday, 24/7
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I-15 Devore Daily Traffic Patterns- Approximately 120,000 ADT (10% trucks)- Weekdays Commuters + Weekend Leisure
II--15 Devore Daily Traffic Patterns15 Devore Daily Traffic Patterns-- Approximately 120,000 ADT (10% trucks)- Weekdays Commuters + Weekend Leisure
0
1,000
2,000
3,000
4,000
5,000
6,000
1 3 5 7 9 11 13 15 17 19 21 23Time of day
Veh
icle
s pe
r ho
ur
SB (Mon-Thu) SB (Sun)NB (Mon-Thu) NB (Fri)
Expected CWZ capacity
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II--15 Devore Pre15 Devore Pre--construction Analysis construction Analysis CA4PRS ScheduleCA4PRS Schedule--TrafficTraffic--Cost ComparisonCost Comparison
TotalClosures
ClosureHours
Max.Delay(Min)
Delay (RUC)Cost ($M)
AgencyCost ($M)
TotalCost ($M)
One RoadbedContinuous (24/7) 2 400 80 5.0 25.0 30.0
72-Hour WeekdayNon-stop 8 576 50 8.0 26.0 34.0
55-Hour WeekendExtended 16 880 80 14.0 27.0 41.0
9-Hour NighttimeClosures 230 2,100 50 7.0 31.0 38.0
8-Hour NighttimeClosures 300 2,400 20 3.0 33.0 36.0
7-Hour NighttimeClosures 410 2,900 10 1.0 35.0 36.0
ConstructionScenario
ConstructionSchedule
CostWZ Traffic Delay
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CA4PRS Implementation in Project Life Cycle & Enhancement
CA4PRS Implementation CA4PRS Implementation in Project Life Cycle & Enhancementin Project Life Cycle & Enhancement
• Planning Stage (PSR/PA&ED): Scope and Priority– VE Analysis and Life-cycle Cost Analysis
• Design Stage: PS&E & TMP packages– Working-days (CPM); Construction staging-plans – WZ Traffic: TMP and Lane-closure charts
• Construction Stage– Validate contractor’s work-plans and CCO
• Upcoming (Continuing) Enhancements– Current V2.1 (M & R): Schedule-Traffic-Cost– V2.5 Roadway Widening– V3.0 Pre-cast Rehabilitation– V3.5 Bridge Replacement
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More CA4PRS Information?More CA4PRS Information?More CA4PRS Information?• Contacts
– Dr. E.B. Lee: UC Berkeley-ITS• (510) 665-3637; [email protected]
– Keith M. Platte : AASHTO Materials and Product Evaluation• 202 624 7830; [email protected]
– Michael Samadian: Caltrans Research• (916) 324-2048; [email protected]
– Dr. Nadarajah Sivaneswaran (Siva): FHWA Turner-Fairbank • (202) 493-3147; [email protected]
– Ken Jacoby: FHWA Office of Asset Management• 202-366-6503; [email protected]
• GOOGLE “CA4PRS”http://www.dot.ca.gov/hq/research/roadway/ca4prs/index.htm
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ShoulderS
houlder
New
Shoulder
GP lanes
New
Express (toll) lane
GP lanes
CA4PRS => Life-Cycle Cost Analysis: I-15 HOT30 Analysis (10 construction x 3 criteria)
CA4PRS => LifeCA4PRS => Life--Cycle Cost Analysis: ICycle Cost Analysis: I--15 HOT15 HOT30 Analysis (10 construction x 3 criteria)30 Analysis (10 construction x 3 criteria)
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