Delivering the Bank Station Capacity Upgrade Project Innovation through Collaboration Cate Anthony (Dr. Sauer & Partners) and John Comins (Dragados) Bank Station Capacity Upgrade Safely together
Agenda • Bank Station Capacity Upgrade • Collaboration at Bank • Combined Lining Design • Pile Load Transfer Structures • SCL Replacing Squareworks • Option A Joint • Construction Progress • Challenges and Successes on Site • Productivity • Resources and Equipment • Current and Upcoming Works Bank Station Capacity Upgrade Safely together
Bank Station Capacity Upgrade Bank Station Capacity Upgrade Safely together
Bank Station Capacity Upgrade Former southbound Northern line platform tunnel re-used to increase circulation and interchange space for customers Triple escalators provide direct link from Central line to Northern line level New entrance to Bank station on Cannon Street. Lifts and triple escalators from street to Northern line and DLR New Southbound railway tunnel and platform for Northern line to create more space for customer circulation Moving walkway in new tunnel provides greater capacity whilst reducing walking distances and interchange times Bank Station Capacity Upgrade Safely together
Design Philosophy – Tier 2 Engagement SCL DETAILED DESIGN SCL DETAILED DESIGN Draft Design Sketch Final Design IDC Compliance Submission IFC Dragados London Tier 1 Underground Joseph Gallagher Tier 2 Dr Sauer Tunnels Tunnel Designer Bank Station Capacity Upgrade Safely together
Combined Lining Design • Approximately 15% saving in lining thickness Bank Station Capacity Upgrade Safely together
SCL Replacing Squareworks Bank Station Capacity Upgrade Safely together
SCL Replacing Squareworks Existing assets New SCL tunnels Construction sequence Bank Station Capacity Upgrade Safely together
SCL Replacing Squareworks Mechanised Excavation and Support Faster and Safer Larger Working Envelope Improved Waterproofing Bank Station Capacity Upgrade Safely together
Option A Joint Bank Station Capacity Upgrade Safely together
Construction Progress so far Start AST shaft sinking November 2016 Start Tunnelling May 2017 Bank Station Capacity Upgrade Safely together
Construction Progress so far – Central & WBS Bank Station Capacity Upgrade Safely together
Challenges and Successes – Site Establishment Bank Station Capacity Upgrade Safely together
Challenges and Successes – AST Shaft Sinking Bank Station Capacity Upgrade Safely together
Resources and Equipment - Excavation Bank Station Capacity Upgrade Safely together
Resources and Equipment – Concrete Supply Bank Station Capacity Upgrade Safely together
Resources and Equipment – Dust & Ventilation Bank Station Capacity Upgrade Safely together
Productivity Tunnel Dia Shift m/day Comment (ave.) NL RT & pilot 4.9m 12hr 2.0 Full Including initial plant chamber Face 8hr 2.7 NL Platform 9.8m 12hr 1.2 TH - Enlargement from pilot INV 8hr 1.5 CP3 8.2m 1.3 TH - INV CL-MW 7.7m 1.8 TH - INV Bank Station Capacity Upgrade Safely together
Current Works – Waterproofing • PVC and Mapelastic spray membranes • 2 layer system • Mapelastic is water based, supplied premixed and dust free • Waste is minimised and it is simple to spray Bank Station Capacity Upgrade Safely together
Upcoming works Bank Station Capacity Upgrade Safely together
Thank you for your attention Bank Station Capacity Upgrade Safely together
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