TBM Assembly Onsite - Nevada
Transcript of TBM Assembly Onsite - Nevada
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TBM Assembly Onsite
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TBM Assembly Onsite
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Cutter Head - Welding in temperature controlled tent
TBM Assembly Onsite
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Sloan, NV
Forms being filled with concrete
Workers installing gasket
Precast Lining Segment Plant
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TBM Shield Precast concrete segmental lining
Precast Concrete Segments
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Precast Concrete Segments
~ 660 of 2500 rings onsite
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Segment Feeder
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Example: Installation of Segmental Lining
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Operator Cabinet
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Example: TBM Lowered into Access Shaft
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Example: TBM Lowering into the Access Shaft
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Underwater workUnderwater workAir lift mucking Air lift mucking Blast & excavateBlast & excavatePrefab structurePrefab structureLower by bargeLower by bargeAnchor w/ Anchor w/ underwater underwater concreteconcreteGPS System GPS System TBM DockingTBM DockingFillingFilling
“01” - Intake No. 3 Shafts & TunnelIntake Riser (under design)
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Crane/Excavation Barge – Dredging Pipe
“01” - Intake No. 3 Shafts & Tunnel
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Technical Challenge - Underwater Blasting
Fig. 1
Underwater Blasting Using Remote Controlled Frame With Charges
Fig. 2
Air Mirror Over Charge Field To Reduce Peak Overpressure
“01” - Intake No. 3 Shafts & Tunnel
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Rock Excavation
Blasting with shaped charges
Airlift mucking
Underwater placement of excavated materials
Monitoring with ROV and Sonar (fish and location)
“01” - Intake No. 3 Shafts & Tunnel
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WATER TREATMENT
FACILITY
INTAKE SHAFT
ACCESS SHAFT
INTAKE TUNNEL
“02”- Intake No. 3 Connector Tunnel
INTAKE No. 2 CONNECTION
INTAKE 1
INTAKE 2
WATER TREATMENT
FACILITY(Existing)
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Intake Pumping Station No. 2
Intake No. 2
Intake No. 1
Intake Pumping Station No. 1
Connector Tunnel Stub
Tunnel
Intake No. 3
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Renda Pacific (Design-Bid-Build) ~ $42 million
Access Shaft (IPS-3 Surge Shaft)~ 450’ deep26’ interior diameter
Tunnel ~2578’ longHorseshoeDrill & Blast
“02”- Intake No. 3 Connector Tunnel
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“02” - Intake No. 3 Connector Tunnel
1st Blast – October 7, 2009
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1st Blast – October 7, 2009
“02” - Intake No. 3 Connector Tunnel
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“02” - Intake No. 3 Shafts & Tunnel“02”- Intake No. 3 Connector Tunnel
Current Progress – 290 feet excavated
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WATER TREATMENT
FACILITY
INTAKE RISER
ACCESS SHAFT
INTAKE TUNNEL
INTAKE No. 2 CONNECTION
“05” - Intake No. 2 Connection & Modifications
INTAKE No. 2 CONNECTION & MODIFICATIONS
INTAKE 1
INTAKE 2
WATER TREATMENT
FACILITY(Existing)
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Intake Pumping Station No. 2
Intake No. 2
Intake No. 1
Intake Pumping Station No. 1
Connector Tunnel Stub
Tunnel
Intake No. 3
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Barnard (Design-Bid-Build) ~ $30 million
Access Shaft (Isolation Gate)~ 380’ deep 22’ interior diameter
Isolation Gate12’ w x 14’ h stainless steel
Tunnel ~500’ longHorseshoeDrill & Blast
Inlet Modifications
“05” - Intake No. 2 Connection & Modifications
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Close quarters…
Work adjacent to operational Intake Pumping Station No. 1 and No. 2
“05” Intake No. 2 Connection & Modifications
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Looking Up Access Shaft Thru Galloway – 26 March 2009
“05” Intake No. 2 Connection & Modifications
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“05” Intake No. 2 Connection & Modifications
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“05” Intake No. 2 Connection & Modifications
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Isolation Gate – December 2009
“05” Intake No. 2 Connection & Modifications
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Gate Guide Rails – Stainless Steel
“05” Intake No. 2 Connection & Modifications
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Isolation Gate
“05” Intake No. 2 Connection & Modifications
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“05” Intake No. 2 Connection & Modifications
Hemispherical Cap
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“05” - Intake No. 2 Connection & Modifications
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“05” Intake No. 2 Connection & Modifications
Intake No. 2 – Dewatered Forebay (South)
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“05” Intake No. 2 Connection & Modifications
Intake No. 2 – Dewatered Tunnel (~1000 gpm inflow)
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“05” Intake No. 2 Connection & Modifications
Intake No. 2 - Quagga Colonization
typical
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Project LocationProject LocationLake Mead National Recreation AreaLake Mead National Recreation Area
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StakeholdersStakeholdersBoaters, divers, jet skiers, fishermenBoaters, divers, jet skiers, fishermenMarinas, concessions and other park vendorsMarinas, concessions and other park vendorsNational Park ServiceNational Park ServiceBike trail usersBike trail usersDelivery/contractor staffDelivery/contractor staffAir traffic over project siteAir traffic over project siteRescue personnelRescue personnelSNWA Operations, security, managementSNWA Operations, security, managementTrade media, local mediaTrade media, local mediaContracting communityContracting community
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Contractor Outreach Tours
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Trade and Mainstream Media Attention
•ENR•Tunnels and Tunneling •LV Review-Journal/Sun•Popular Mechanics•Southwest Contractor•Tunnel Business•Bloomberg News
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River Mountains Loop Trail Box Culvert
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Additional Borings
Geotech drilling on Lake Mead and on land
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ATTENTION LAKE MEAD VESSEL OPERATORS AND MARINAS
RESEARCHAREA
Contractors for the Southern Nevada Water
Authority will be performing underwater geological research activities near Saddle Island and Black
Island.
Thank you for your cooperation.
Questions? Contact SNWA at
702-862-3405
Drilling barges may be located in the research
area from November 2008 through ________ 2009.
Please maintain a 100-yard distance from
the barges and equipment at all times.
ResearchArea
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Project Schedule
“01” - Intake No. 3 Shafts & TunnelCavern/Stub/Starter Complete 5/26/2010TBM Lowering 8/2010TBM Tunneling Begins 11/2010TBM Tunnel to Intake Complete Q4/2012Final Completion Q1/2013
“02” - Intake No. 3 Connector TunnelFinal Completion 7/27/2012
“05” - Intake No. 2 Connection & ModificationsIPS-2 Shut Down Complete 1/21/2010Final Completion Q2/2010
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Deferred Contracts
Intake No. 3 Pumping Station
Pumping station forebay and well shaft excavation, build-out, chlorine building construction, yard piping
Future
Substation and permanent power supply (by CRC)
69/13.8 kV Electrical substation, pre-purchase of equipment, 69 kV Duct bank
Future
Discharge pipeline ~2,130 feet of 144-inch and diameter discharge pipeline, ~4,050 feet of 24-inch diameter potable water pipeline, etc.
Future
Contract Description Advertising Est.
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Questions? Questions?