scl radial joint design – bank station capacity upgrade · 2017. 11. 21. · no entrance to...
TRANSCRIPT
PARIS– 15 November 2017
SCL RadialJoint Design –Bank StationCapacity Upgrade
Bethan Haig
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
StakeholdersDr Sauer & Partners – SCL Designer
Dragados – Design & Build Contractor
London Underground – The Client
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
The Project
BSCU SCL Radial Joint Design– Bethan Haig
Bank Station Capacity Upgrade
PARIS– 15 November 2017
The Project
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
The Team
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
The Team Approach
BSCU SCL Radial Joint Design– Bethan Haig
Biweekly constructability review meetings
Sketch Draft Design Compliance SubmissionIDC IFCFinal Design
SCL DETAILED DESIGN
• More than 30 biweekly workshops including members of LU and Dragados
• Collaborative approach to improve health and safety and efficiency throughdesign
PARIS– 15 November 2017
SCL Safety Hazards and Quality Issues
BSCU SCL Radial Joint Design– Andreas Feiersinger
• Fallouts• Complex connections of reinforcement
at radial joints• Poor quality jointing• Poorly executed design
PARIS– 15 November 2017
The Design Solution
BSCU SCL Radial Joint Design– Bethan Haig
No entrance to sealed tunnel face
Change behaviour in the tunnel
PARIS– 15 November 2017
The Design Solution
BSCU SCL Radial Joint Design– Bethan Haig
Stage 1
Excavate top heading/benchApply primary SCL
Stage 2
Excavate bench/invertBreak off toe to form min.150mm construction joint
Stage 3
Apply primary SCL to fullthickness
PARIS– 15 November 2017
Trialling the Design and Workmanship
BSCU SCL Radial Joint Design– Bethan Haig
The joint was tested as part of thepre-construction trials
PARIS– 15 November 2017
Trialling the Design and Workmanship
BSCU SCL Radial Joint Design– Bethan Haig
The joint was tested as part of the pre-construction trials
Option A joint core Normal core
PARIS– 15 November 2017
The Design in Use- The project has seen excellent implementation of the joint in the construction stage.
- Excellent workmanship
- Tight Supervision
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
The Design in UseThe SCL construction process is now completely mechanised
BSCU SCL Radial Joint Design– Bethan Haig
PARIS– 15 November 2017
The Feedback
BSCU SCL Radial Joint Design– Bethan Haig
The implementation of this joint design has gleaned the following feedback from theconstruction team and miners:
This is one of the mostpositive changes to theindustry in the last 20years
The joint is one safetychange that we can seereally and truly making adifference to the team onsite – Nice one!
Once mastered it couldbe said that this is astep change for tunnelhealth and safety
We are particularly impressedwith the elimination of HAVs,removal of honeycombing aroundbars and the associated defectrepair