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Forth Road Bridge - Truss End Link failure -22 dec
- 1. Truss End Link Failure Forth Road Bridge 22 December 2015
- 2. What’s Been Done – SITE / CONSTRUCTION • Safety Paramount • >250 Site Safety Inductions • Exceptional Dedication in Face of Challenging Environment • 11 sub-contractors • Temporary Access – Scaffold / MEWP / Barge • 67 Scaffolders • Steel Fabrication / Welding / Jacking • 46 Specialist Welder / Fabricators
- 3. What’s Been Done – INSPECTION / INVESTIGATION • Close Visual Inspection Entire Bridge • 76 Engineers & Inspectors (55 Rope Access Qualified) • High resolution Drones used for 1st time • Non Destructive Testing • Ultrasonic Tests, Magnetic Particle Inspection • 21 Engineers & Technicians • CCTV Camera observing crack 24/7
- 4. What’s Been Done - DESIGN • Design / Check / Certification of Repair completed in parallel with fabricating ‘splints’ • 53 staff (including 21 Chartered Engineers) • Design of Temporary Access – Scaffold (Hanging & Tower) ; MEWP ; Barge • 16 Engineers & Technicians • Design of Sophisticated Structural Monitoring System • 14 Specialist Engineers • 1st Time used on Forth Road Bridge – similar system to Queensferry • Design of Traffic Routes / Signage / VMS • 38 Engineers & Technicians
- 5. What’s Been Done - COMMUNICATIONS • Websites – Forth Bridge & Dedicated Site • Media Enquiries • 120no. • >400 Press articles • Twitter Followers • 43,006 • Facebook Likes • 360,000 • 2 million engaged via facebook • Physical Model Created
- 6. Controlled Load Test To Observe Structural Behaviour
- 7. Why HGV Restriction • Lower Pin NOT rotating as hoped • Strain Gauges measured live results during load test
- 8. Next Steps • Re-open to all traffic (except HGV’s) • Load Test verification • Sophisticated Strain Gauge / Structural Monitoring Device verification • Non destructive testing verification • Independent expert verification • Full inspection of bridge verification • Permits 91% of traffic to re-use the bridge and a 32% reduction in loading • Committed to HGV re-opening • Permanent Design - Completion early January 2016 • Strain Gauge / Structural Monitoring Device • All 8 truss end link areas – mid January 2016 • Start Construction to NE Link • January 2016