design & construction of underground lake taps · 2018. 10. 2. · mtbm removal. wet tap final...
Post on 26-Jan-2021
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TRANSCRIPT
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Design & Construction
of Underground
Lake Taps
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Agenda
1. Underground components
2. Shore Shaft
3. Tunnel
4. Tap/Intake
5. Construction Issues
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Underground Components
Shore Shaft
Tunnel
Tap/Intake
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Shore Shaft•Design•Construction
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Shore Shaft•Design•Location•Access
•Configuration• Size, Shape & Depth• Pump Station•Gate House• Construction
•Geology• Initial support•Connection to Tunnel•Final Lining
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Shore Shaft•Construction•Excavation•Drilled•Mechanical Shaft Sinking Machine• Conventional Drill & Blast
•Lining• Top Down• Bottom Up
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Tunnel
•Design•Construction
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Tunnel•Design•Alignment• Vertical• Horizontal
•Configuration• Size, Shape & Depth
•Geology• Initial support•Connection to Tap/Intake•Final Lining
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Tunnel•Construction•Excavation• Tunnel Boring Machine•Microtunnel Boring Machine• Roadheader• Conventional Drill & Blast
•Lining• Pipe• Concrete• Segments
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Tap/ Intake•Design•Construction
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Tap/ Intake•Design•Wet or Dry•Location• Vertical• Horizontal
•Configuration• Size, Shape & Depth
•Geology• Initial support•Structure• Support• Configuration
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Tap/Intake •Construction
• Connection• Wet• Dry
•Marine• Marina• On Water
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Wet Tap
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Microtunnel Wet TapPrepare to Breakout
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Microtunnel Wet TapBreakout
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Microtunnel Wet TapPreparation to disconnect
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Microtunnel Wet Tap
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Microtunnel Wet TapPreparation to remove MTBM
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Microtunnel Wet TapMTBM Removal
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Wet TapFinal Positioning of Casing
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Wet TapPlace Elbow & Trash Rack
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Norwegian Tap
•Tunnel to a rock plug•Construct Rock trap•Prepare tunnel for water•Blast rock plug
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Dry Tap
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Dry Tap
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Dry TapExcavation for work slab
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Dry TapConcrete Slab Construction
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Dry TapGround Improvement
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Dry TapLining installation
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Dry TapShaft Excavation
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Dry TapLiner Installation
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Dry TapGrout Liner
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Dry TapTunnel Arrival
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Dry TapConnection to Tunnel
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Dry TapConnection to Tunnel (cont.)
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Dry TapPlacing elbow in Tunnel
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Dry TapSetting of Intake
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Dry TapSetting of Intake (cont.)
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Construction IssuesAccessMarine worksWeather Environmental
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QUESTIONS ???
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Dry Tap
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