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Buildings
This document discusses precast concrete technologies used by Inhabit Group for building facades. It describes several projects where precast facades were utilized including residential towers in Hong Kong and Dubai. Advantages of precast facades include faster construction, higher quality finishes, and reduced on-site formwork. Challenges include less flexibility in design and delays affecting construction schedules if precast elements are delayed. New technologies discussed include fabric formed and sprayed concrete panels along with flexible molds allowing more dynamic precast panel shapes.
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Buildings
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- 2. Inhabit Group • Façade •Building Maintenance & Cleaning • ESD • Acoustics • Lighting
- 3. Buildings • Highrise /super high rise • Retail Developments • Institutional, Airports etc
- 4. • The Orchards– Hong Kong • Habtoor residences – Dubai • Vietin bank tower – Hanoi, Vietnam • New technologies Precast
- 5. The Orchards –Hong kong 2 no 48/F towers • Government regulations gave dispensation on GFA • Façade, balconies and stairs are precast concrete • An innovative façade design was utilized
- 6. Strategic Decisions -Facade • façade utilised as formwork • Partnership with contractor • Savings in formwork and time
- 7. Precast elements • facade •Balconies • Corewall cladding • Installation sequence will demonstrate Design
- 8. Joints • Curtain walltechnology • Used on Dubai mall • Double seal pressure equalized • Superior redundancy and air, dust and water infiltration
- 9. Installation sequence • Unitsprefabricated with window frames • Base slab set • Sequence ready to commence
- 10. Installation sequence • Precastpanel erected off base slab • panel stabilised with accrow props • Reusable leveling brackets for adjustment
- 11. Installation sequence • Tableforms installed
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- 13. Installation sequence • Nextcycle commences
- 14. Pros and cons Advantages •Less formwork • Faster construction (4 day floor cycle time) • High quality finish to façade Disadvantages • Less flexibility on site – design must be coordinated • Delays in precast fabrication of façade will affect floor cycle
- 15. Findings Hong Kong Polytechnicuniversity Cost
- 16. Habtoor Residences 2 70/Ftowers + 1 50/F tower • Constraints on floor loading • Floor footprint to be minimised • Unitized GRC system
- 17. Typical bays • GRCCladding • Balconies • Glazing • Metal fin
- 18. Typical Curtain wall •Adapt unitised system to work in all areas • Light weight • Single trade on site • Very fast construction • Minimum façade zone
- 19. Combining GRC withCurtain wall Aluminium Frames • Airseal • Structural support GrC / Glass • Cladding / facing elements
- 20. GRC fixings • Stainlesssteel • Alkali reaction
- 21. Fabrication GRC Panel GlassPanel • fabricate frames • Fix support brackets • fabricate frames • Fix support brackets
- 22. Fabrication GRC Panel GlassPanel • Fix GRC brackets (extra step) • No change
- 23. Fabrication GRC Panel GlassPanel • Fix backpan airseal • Fix backpan airseal
- 24. Fabrication GRC Panel GlassPanel • Fix Insulation • Fix Insulation
- 25. Fabrication GRC Panel GlassPanel • Fix GRC • Fix Glazing
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- 28. Vietin Bank -Hanoi • Twin towers • 360 meter high • Tall building movements
- 29. Vietin Bank -Hanoi • Lost form panels • Structural corner cores • Tall building movements
- 30. Column differential shortening • Windload • Creep • Dead load GRC façade supported yet isolated • Flexible Stainless steel dowels • Gromits allow differential movement • Bond breaker allow differential movement
- 31. Construction sequence • Lostform panels • High quality finish • Design integrated with climbing formwork Climbing formwork used
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- 33. Formwork jacked onrails Construction sequence
- 34. GRC lost formpanels added Construction sequence
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- 36. Lost form paneldetails • Panels used to give high quality finish and reduce form work cost
- 37. Lost form panel •Visual mock-up
- 38. New technologies • Fabriccast / spray cast concrete • University of Manitoba - canada
- 39. New Technologies • Freeform panels • Delft University of Technology – Roel Schipper
- 40. New Technologies • Flexibleand dynamic molds
- 41. Casting Procedure • Pourconcrete into flat mold
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- 45. Thank you Australia | China | Hong Kong | United Arab Emirates www.inhabitgroup.com