Pittsburgh Light Rail Project, North Shore Connector, Tunnels and Station Shell
Transcript of Pittsburgh Light Rail Project, North Shore Connector, Tunnels and Station Shell
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NORTH SHORE CONNECTORNORTH SHORE CONNECTOR
TUNNELS AND STATION SHELLTUNNELS AND STATION SHELLTUNNELS AND STATION SHELLTUNNELS AND STATION SHELLLIGHT RAIL PROJECTLIGHT RAIL PROJECT
PAUL ZICK, PE
NORTH SHORE CONSTRUCTORS JV
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North Shore Connector Alignment
•• 7300 lf 7300 lf Extension to existing 25 mile systemExtension to existing 25 mile system
•• 18 Contracts18 Contracts
• $435 Million$435 Million
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Funding – $ 435 Million
80%
17%17%3%
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Project Location006006007007
Future- to Airport North ShoreNorth Shore
003003
006006007007
Airport North Shore North Shore Connector Connector Light Rail Light Rail E iE iExpansionExpansion
004 New Gateway Station004 New Gateway Station
Existing
EXISTING GATEWAY EXISTING GATEWAY STATIONSTATION
Existing Light Rail System
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Project Team• Owner
–– Port Authority of Allegheny CountyPort Authority of Allegheny County
• Construction ManagerTriGoldTriGold–– TriGoldTriGold
• Jacobs Civil
• HDR
• Kwame
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Project Team• Design Engineer
–– DMJMDMJM
• ContractorNorth Shore Constructors JVNorth Shore Constructors JV–– North Shore Constructors JVNorth Shore Constructors JV
• Obayashi Corp.
• Trumbull Corp.
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What we are building
• Two Contracts
• Combined Contract Value - $156 500 000Combined Contract Value $156,500,000
• Time ––– NTPNTP Oct 2, 2006Oct 2, 2006
–– 003 Tunnels 003 Tunnels 1243 days1243 days Feb 26, 2010Feb 26, 2010
–– 006 Station / C&C006 Station / C&C 870 days870 days Feb 18, 2009Feb 18, 2009
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Four Major Structure Types
• Boat Section – 340 lf–– SOE SOE -- Steel Soldier Piles and Wood LaggingSteel Soldier Piles and Wood LaggingSOSO Stee So d e es a d ood agg gStee So d e es a d ood agg g
• Cut and Cover – 1200 lfSOESOE C t D S il Mi i W ll (CDSM)C t D S il Mi i W ll (CDSM)–– SOE SOE -- Cement Deep Soil Mixing Wall (CDSM)Cement Deep Soil Mixing Wall (CDSM)
–– SOE SOE –– Cement Bentonite Wall (CB)Cement Bentonite Wall (CB)
• Top Down Construction - Station–– SOE SOE -- Slurry WallSlurry Wallyy
• Bored Tunnel – 2240 lfSOESOE P t C t S t l Li iP t C t S t l Li i–– SOE SOE -- Precast Concrete Segmental LiningPrecast Concrete Segmental Lining
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Boat Section – Soldier pile and lagging• Excavation – 0 to 35 feet
• Soldier Piles and Wood Lagging
• Above or at the water table
• Deep Wells
Walls and Waterproofing
EXISTING SOILSEXISTING SOILS
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Boat Section - SOE - Soldier Piles & Lagging
Soldier Piles andSoldier Piles andSoldier Piles and Soldier Piles and LaggingLagging
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Cut & Cover – SOE CDSM Walls
BACKFILLCDSM Walls
60’ +/60’ +/-
Cut off ground water
ROCK
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Cut & Cover / Launch Pit – CDSM Walls
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Cut & Cover / Launch Pit - CDSM WALLSI l il i d ithIn place soils mixed with Bentonite Slurry going down
Cement Slurry mixed going up
Insert Steel Soldier Piles
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CDSM –SOE – Drill Rock Socket
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CDSM WALLS – Temporary Bridge
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Excavation / Mud Slab / WP/ Base Slab
ROCK
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Structural Concrete
Waterproofing
ROCK
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Structural Concrete – Cut and Cover
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Backfill
BACKFILL
ROCK
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Bridge to hold the Bridge
Support two Bents
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Cut & Cover – InstrumentationInstruments
Stain gauges
Weather
Tilt MetersTilt Meters
MotorizedMotorized Total Station
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Underpinning – SR-65
Drilled PierDrilled PierDrilled PierDrilled Pier
Drilled PierDrilled Pier
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Underpinning – SR-65
ROCK
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Underpinning – SR-65
Drilled PierDrilled Pier
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Underpinning – SR-65
ROCK
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Underpinning – SR-65
ROCK
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North Side Station Shell
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North Shore Station - Slurry Walls
SEA PARKING GARAGE
Concourse
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North Shore Station - Slurry Walls
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North Shore Station – Slurry WallsDESANDING
P iP iP i
DESANDING
Excavate Slot Primary Panel
Primary Panel
Primary Panel
SecondarySecondary Panel
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North Side Station – Slurry walls
Concrete P iP iP iConcrete Primary Panel
Primary Panel
Primary Panel
Secondary Secondary
Rebar
Tremie pipeSecondary
PanelSecondary
Panel
Rebar
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Slurry Walls - Rebar Cage
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North Side Station – Top Down
ROCK
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North Side Station – Pour Roof Slab
Roof SlabRoof Slab
ROCK
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Excavate to Concourse
BackfillRoof Slab
CONCOURSE
Roof Slab
ROCK
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Excavate to Concourse
BackfillRoof Slab
Soldier Piles installed by building Soldier Piles installed by building contractorcontractor
CONCOURSE
Roof Slabcontractorcontractor
ROCK
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Excavate to first row of struts
BackfillRoof Slab
CONCOURSE
Roof Slab
ROCK
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Station Roof Slab Excavation
60 ft
40 ft40 ft
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Excavate to Invert – Pour Base Slab
BackfillRoof Slab
CONCOURSE
Roof Slab
SLAB ANCHORS
ROCK
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Station Ground Anchors
Ground Anchors
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Construct Platform & Deck
BackfillRoof Slab
CONCOURSE
Roof Slab
ROCK
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TBM Launch Pit - SOE
CDSM WALL
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TBM Launch Pit - SOE – Tie Backs
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Launch Pit - SOE – Tie Backs
TIE BACKS
TIE BACKS
TBM
ROCK
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Ground Improvement - Jet Grouting
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Launch Pit - Jet Grout
Jet Grout column construction
Drill Down
Grout bottom up
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Launch Pit – Entrance Packing
Soft Eye
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TBM – Move to Launch Pit
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TBM – Move to Launch Pit
150 feet fully assembled150 feet fully assembled
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Launch Pit – TBM Launch
JET
GROUTJET
GROUT
21
GROUT
3 21 3
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Launch Pit – Structure Work
JET
GROUT
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Stanwix St. Receiving Pit Location
GATEWAY II
HORNE BUILDING
RECEIVING PIT
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Ground Improvement - Jet Grout
75% COVERAGE
Receiving Pit
100%
100% Coverage
6’ Around Tunnel6 Around Tunnel
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Ground Improvement - Jet Grout – 75%HORNE BLGHORNE BLG.
MinimizeMinimize Angular Distortion due t dto ground loss
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Jet Grouting Stanwix Street
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Stanwix Street Receiving Pit – CB Wall
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Bored Tunnels
Tunnel Tunnel Boring Boring M hiM hiMachine Machine Launch PitLaunch Pit
TBM Tunnels – 2200 lfNORTH SHORENORTH SHORE
Receiving Pit
SOUTH SHORESOUTH SHORE
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Bored Tunnel SectionPRECASTPRECAST SEGMENTLININGLINING
Segment Lining 20’ inside diameter
CAST IN PLACEPLACE INVERT
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TBM TunnelsSl P B l TBM (SPBTBM)• Slurry Pressure Balance TBM (SPBTBM)
–– Mixed Shield (Soft Ground and Rock)Mixed Shield (Soft Ground and Rock)
–– Working Pressure 3 barWorking Pressure 3 bar
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Mining Cycle – Mine 4’ & Grout
Mine 4’Mine 4’
GROUT MAINTAINEDGROUT MAINTAINED BEHIND SHIELD
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Mining Cycle – Install 4’ Segment Ring
Build 4’ RingBuild 4 Ring
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Mining Cycle – Ring Complete - Mine
Mine 4’Mine 4’
GROUT MAINTAINEDGROUT MAINTAINED BEHIND SHIELD
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Segment Grouting
Segments Grout Nozzle
Grout
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TBM – SLURRY – MIX SHIELD
22’-9”
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SPTBM Mixed Shield
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Slurry TBM – 22’- 9” dia (6.92 m)24 17 i h t i• 24 -17 inch twin disk cutters
• 20 - Scrapers20 Scrapers
• Bucket lips
• 3 - Wear• 3 - Wear detection devices
• 0-2.7 rpm
• Left or Right
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Cutting Tools – After first tunnelDi k C tt• Disk Cutters
• Scrappers• Bucket Lips
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Rock Crusher
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TBM Assembly – Man Locks – 3 Bar (45 psi)
Material Lock
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Cutter Head Drive
• Motors - 8 – 101 hp
• Total - 808 hp18
2Total 808 hp
• Variable Frequency Drive (VFD)
7
Drive (VFD)
• 480 v AC 4
3
5
6
• 0-2.7 rpm (l or r)
• Main bearing 8 5 ft
45
• Main bearing – 8.5 ft
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TBM – Rear of Middle Shield5 Cylinders 4 Steering Groups
6 Cylinders
7 Cylinders
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TBM – Rear of Middle Shield• Propel Cylinders - 24
• Piston Diameter - 260 mm
• Rod Diameter - 220 mm
• Max Stroke - 1750 mmMax Stroke 1750 mm
• Advance force - 38227 kN (4,296 tn)
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TBM Operation
Excavation Chamber
Working Chamber
Hydrostatic and Soil
Slurry In
and Soil Pressure
Slurry OutSlurry Out
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TBM – Operation Plan
455 hp PUMP
SLURRY IN
2 EA 455 h PUMPSSLURRY OUT2 EA - 455 hp PUMPS
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Slurry Separation Plant
Plant Capacity Plant Capacity 1000 m1000 m33/hr/hr1000 m1000 m /hr/hr
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Segment ErectorH d li l iH d li l i•• Hydraulic telescopic arm type Hydraulic telescopic arm type
•• 6 ranges of movement6 ranges of movement
•• TelescopeTelescope
R t tiR t ti•• RotationRotation
•• TravelTravel
•• Independent Independent Roll & YawRoll & Yaw–– Roll & YawRoll & Yaw
•• Controlled by joy stickControlled by joy stick
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Segment Erector
• Thrust rams retracted 4’- 6”
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Segment Installation
BOLTBOLT
Segment ErectorSegment ErectorSegment ErectorSegment Erector
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Key Segment Installation
TBM Shield
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Key Segment Installation
MOVE OUT
KEY SEGMENT MOVE FORWARD
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TBM Mining – Start North SideNORTH SHORESOUTH SHORE
Equitable
NORTH SHORESOUTH SHORE
Equitable Resources
Building
Soft Ground
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Fluvioglacial Material• Gravel 40% - 57%
• Sand 50% - 38%
• Fines 10% - 5%
• Cobbles - up to 2’Cobbles up to 2
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TBM Mining - River CrossingNORTH SHORESOUTH SHORE
Equitable
NORTH SHORESOUTH SHORE
Equitable Resources
Building
Mixed Face
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TBM – North River Wall
Alluvium
Claystone
Fluvioglacial
Siltstone
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TBM North River Wall - Grouting
Alluvium
Claystone
Fluvioglacial
Siltstone
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River CrossingNORTH SHORESOUTH SHORE
Equitable
NORTH SHORESOUTH SHORE
Equitable Resources
Building
Rock
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River Crossing
25 feet ALLEGHENY RIVER
RIVER SILTS (ALLUVIAL)22 feet
Top of Rock FLUVIOGLACIAL
( )22 feet
SILTY SHALE (5,400 SILTY SHALE (5,400 –– 11,800 psi)11,800 psi)
CLAYSTONE (200CLAYSTONE (200 4 400 psi)4 400 psi)COALCOAL
10 feet
CLAYSTONE (200CLAYSTONE (200-- 4,400 psi)4,400 psi)
SILTSTONE (3 400SILTSTONE (3 400--11 000 psi)11 000 psi)SILTSTONE (3,400SILTSTONE (3,400--11,000 psi)11,000 psi)
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River CrossingNORTH SHORESOUTH SHORE
Equitable
NORTH SHORESOUTH SHORE
Equitable Resources
Building
Well Horne Blg.
Soft GroundJet Grout
Mixed Face
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TBM Guidance System – VMT
Total StationTotal Station Operator’s DisplayOperator’s Display
80 mm
TargetTarget
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Precast Segments – Universal RingSix pieces + Key4’ – Long
20’ ID
4 Long
Bolted
Two tapers 2-3/8 & 1-5/8
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Segment Rebar Cages
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Seg Plant – cycle 4 rings X 2/ day
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Segment Finishing Line•• Rotate Segments Rotate Segments ––
curve upcurve up
•• Repair SurfacesRepair Surfaces
•• Add GasketAdd Gasket
•• Add Joint PackingAdd Joint Packing
•• Stack in reverse order Stack in reverse order of installationof installation
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Secondary Steam Curing
• 5 day Secondary Cure
• 8000 psi8000 psi
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Multi Purpose Vehicle (MVP)
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Multi Purpose Vehicle (MVP)
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Heading Segment Unloading
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Heading Segment Unloading
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Segment Erection
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Tunnel Infrastructure
50,000 CFM Ventilation50,000 CFM VentilationTemporary Temporary LightingLighting
2 - 4” water
8” Discharge
Walkwayy
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First Tunnel to Receiving Pit - July 10, 2008
Soft eye Soft eye ––Fiberglass pilesFiberglass piles
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First Tunnel to Receiving Pit - July 10, 2008
Containment Wall
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TBM U-Turn
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TBM U-Turn- Rotate 180 deg
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TBM U-Turn- Rotate 180 deg
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TBM U-Turn- Rotate 180 deg
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TBM U-Turn- Rotate 180 deg
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Invert Clean Up
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Invert Placement
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Thank YouThank You
Questions?Questions?