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Waterview Connection -The Final Drive to completion
Annual Australian Tunnelling Conference – Sydney 2016
Iain Simmons – Alliance Project Manager, Well-Connected Alliance
David Taylor – M&E Construction Manager, Well-Connected Alliance
11th October 2016
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Waterview Connection –The Final Drive to Completion
1. (Re)Introduction to the project
2. Recap on tunnel facts
3. TBM final breakthrough
4. TBM de-mobilization
5. Status across the three distinct project zones
6. Cross passage completion
7. M&E fit-out to the tunnels and ventilation buildings
8. Timeline for completion
9. Community legacy
10. Questions
Contents
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Key Auckland transport links- Less than 2km wide isthmus
- Traffic running through congested central corridor
- Overly dependent on central, single north-south spine
- Network “ladder” model adopted
Western Ring Route- One of the NZ Governments seven roads of
national significance (RONS)
- Waterview Connection is the missing link between SH 20 and SH 16
- Completes 48km motorway ring route for the NZ Transport Agency
- Links major population and industrial centres
Waterview Connection- 5km of new motorway
- 2.4km of which comprises two three lane tunnels
Project Costs- NZ $1.4 Billion – the country’s biggest roading
project
(Re)Introduction to the Project
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Tunnel Section – Connecting State Highway 16 with State Highway 20
Tunnel Facts
• Southbound length 2398m
• Northbound length 2410m
• Internal dia. 13.1m
• 3 traffic lanes each direction
• Max. vertical grade 5%, curve min. radius 1,500m
• 18 Cross-passages linking both main tunnels together, spaced every 150m
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Tunnel LayoutCross Section
M&E
Traffic Envelope
Lining
Pavement
Stage 2 Backfill
Stage 1 Backfill
Service Culvert
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Tunnel during excavation
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Completing the Northbound TunnelTBM Breakthrough
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De-commissioning the TBM
Completing the Northbound Tunnel
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Completing the Northbound TunnelDe-commissioning the TBM
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Completing the Northbound TunnelDe-commissioning the TBM
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Completing the Northbound TunnelDe-mobilisation of the TBM
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Great North Road Interchange (GNRI)
• 4 new Highway Bridges linking with State Highway 16
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GNRI Current Status
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Southern SectionAerial view looking South
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Finishing the Southern Approach PortalSouthern civils entering final stages
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Cross PassagesLogistical challenge of 16 cross passages
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Cross PassagesExcavation – monitoring load transfer
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Cross PassagesShotcrete primary support
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Cross PassagesWaterproof lining
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Cross PassagesInvert Formwork
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Cross PassagesCross PassagesCollar Reinforcement
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Collar Formwork
Cross Passages
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Completed cross passage ready to hand over to the M&E team
Cross Passages
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Completing the paving
What’s happening underground right now?
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Completing the M&E Installation
What’s happening underground right now?
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M&E Fit-out
• Main challenges and lessons learnt
• Ngarara - The drilling gantry
• M&E fit-out Scope of works
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Black roof 86,000m2
Tunnel Painting
White walls 48,000m2
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• Tunnel Anchors (Approximately 36,000 post installed mechanical anchors in bored tunnel)
• Supports (Approximately 8,600 supports in bored tunnel)
• Typically support groups located (longitudinally) in the centre of every ring, skipping every third ring, e.g. 2m, 2m, 4m spacing
Tunnel Supports
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• Tunnel lighting (4000)
• PA Speakers
• Radio Rebroadcast (RRB)
• Dynamic signage
Tunnel Systems
• Speed Cameras
• CCTV
• Overhead detection and barrier gates
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• Fire deluge and hydrants (175 sprinkler zones, 109 double hydrant outlets)
• Jet Fans (62)
• Sliding egress doors (36)
• LHD Cable (10km)
Fire Life Safety
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• Tunnel and culvert cable support system (50km cable tray)
• HV, LV, data and comms cabling (270T, 400km)
• 8 Transformers, 4 x 22kv Switchgear Panels, 8 x LV 690V/415V MSB, 4 x UPS Units, 500 Batteries, 64 x XP DB’s, 40 x RIO’s
Electrical Distribution
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• Exhaust Fans (8)
• Maintenance Hoists (17)
• HVAC
• Fire alarm, gaseous suppression and foam suppression systems
• 3 drainage sumps (13 pumps)
• Fire water storage tanks (5)
• Fire water pumps (5)
Vent Building Systems
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Challenges and Lessons Learnt
Design
• Subcontractor design
• Inter disciplinary coordination
Procurement
• Procurement packages
• Overseas supply and lead times
• Seismic compliance
Construction
• Planning & coordination amongst teams
• Storage & site facilities
Commissioning
• FAT
• Systems completion and handover
• Programme
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Challenges and Lessons LearntDesign
• Subcontractor design
• Inter disciplinary coordination
• Construction and stakeholder review
Procurement
• Procurement packages
• Overseas supply and lead times
• Post award Subcontractor submittals
• Seismic compliance
Construction
• Resourcing
• Construction area handover
• Planning & coordination amongst teams
• Storage & site facilities
Commissioning
• FAT
• Systems completion and handover
• Programme
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Ngarara – The Drilling Gantry
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Ngarara – The Drilling Gantry
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Ngarara – The Drilling Gantry
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Overall Project Programme
October
2016
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Waterview Playground
Community Benefits – already in use
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Boardwalks, Shared paths, Skate parks, BMX tracks
Community Benefits – more to come