The Shard, elegant och miljösmart byggande i London - Christer Isgren, OtB Concrete
•
2 likes•1,462 views
The document provides details about the construction of The Shard, a 95-story mixed-use skyscraper in London. It describes the tower's layout including 3 basement levels, offices, restaurants, hotel, apartments and spire. Construction involved excavating 60,000 cubic meters for the basements. The reinforced concrete core rises from the basements to level 72 with post-tensioned concrete slabs from levels 40 to 72. Safety, logistics and concrete mix design were key considerations. Concrete mixes were bespoke and tested for properties. The raft foundation concrete contained limestone and fly ash to control temperatures during curing. Slipforming involved erecting a 3-level rig to construct the reinforced
More Related Content
What's hot
What's hot (20)
Similar to The Shard, elegant och miljösmart byggande i London - Christer Isgren, OtB Concrete
Similar to The Shard, elegant och miljösmart byggande i London - Christer Isgren, OtB Concrete (20)
More from Svenska Betongföreningen
More from Svenska Betongföreningen (20)
Recently uploaded
Recently uploaded (20)
The Shard, elegant och miljösmart byggande i London - Christer Isgren, OtB Concrete
- 1. 1-Nov-17 Concrete Engineering-The Shard of Glass 1
- 2. Tall Structures Tall Towers Infra structure Tunnels 1-Nov-17 Concrete Engineering-The Shard 2
- 3. • G-L3 Public/Entrance • L4-L28 Offices • L31-L33 Restaurants • L34-L50 Hotel • L52 Spa • L53-L65 Apartments • L68-L71 Viewing Gallery • L72-L87 Spire The Shard Mixed Use Tower 3 Spire High Level Viewing Gallery 11No Residential Units Mid Level Viewing Galleries Circa 600,000ft Offices 1-Nov-17 Concrete Engineering-The Shard 3
- 4. 1-Nov-17 • 3 Basements 3 Basements 19m deep (deepest formation) 60,000m3 of Excavation RC Core B3 to L72 • RC Core B3 to L72Steelframe L00 to L40 15,000 Pieces or 11,800 Tonnes • Steelframe L00 to L40 Spire L72 to L87 • Spire Steelwork 72-87 • Plant Room L29 + L30 Plant Room L29 + L30 • Plant Room L18 + L19 Plant Room L18 + L19 PT Frame L40 to L72 • PT Frame L40 to L72 • Plant Room L66 + L67 Plant Room L66 + L67 • Plant Room L51 to L54 Plant Room L51 + L54 • Secant Pile Wall • Bearing Piles Curtain Walling 56,000m2 10,500 No Panels GIA Level 72 : 311m2 GIA Level 05 : 3,100m2 Concrete Engineering-The Shard 4
- 5. 1-Nov-17 Concrete Engineering-The Shard 5 Concrete Scope: The Shard 1. Three Level Basement (top-down) 2. Deep Raft slab 3.0 m (piled) 3. 249m high core 4. Post tensioned slabs (40-72) 5. 126 week programme 6. 55,000 cubic metres concrete The Tall tower aspects: 1. Safety 2. Logistics 3. Concrete
- 6. Plan for Basement excavation works Emergency Plan Fire •Sound Klaxon and all personnel exit via the nearest staircase •All personnel to meet at the Muster point at Gate 4 •Call Fire Brigade Gas Monitor Alarm •Sound Klaxon ad all personnel exit via the nearest staircase •All personnel to meet at the Muster point at Gate 4 •Site Management check status of alarm, deal with as per manufacture’s manual Injury to Personnel •Contact nearest First Aider •If able to walk exit via the nearest staircase •If unable to walk contact emergency services and remove using standby crane and man cage Muster Point Exit Routes (subject to progress of works) 1-Nov-17 Concrete Engineering-The Shard 6
- 7. Logistics Plan 1-Nov-17 Concrete Engineering-The Shard 7
- 8. Bespoken mixes All mixes pre-tests: 1-Nov-17 Concrete Engineering-The Shard 8 • Optimum material • Consistence (Slump) • Setting time • Strength development • Maturity • Heat of Hydration • Tensile strength • CTE
- 9. The Raft concrete • Design for no early temperature cracks without cooling – Peak < 55°C, Max diff temp <27°C, Limestone, 75% GGBS • C 35/45 DC-2 • Rebar density S5 1-Nov-17 Concrete Engineering-The Shard 9
- 10. 6 Jan 7 Dec 15 Jan 25 Nov 18 Jan3 Dec 8 Jan 54 3 2 1 5517 m3 404 m3 484 m3 523 m3 323 m3 B3 Pour Layout 1-Nov-17 Concrete Engineering-The Shard 10 Single Pour Option-Logistics 4 Pumps 44 wagons at peak 36 Hour target pour commencing Friday 7pm 2 plants with third one on standby 4 pumps positioned for 2 trucks at each hopper Additional pumps on standby Average pour rate 150 cube/hour Peak pour rate 240 cube/hour
- 11. 1-Nov-17 Concrete Engineering-The Shard 11 Concrete Deliveries:
- 12. Slipform Construction 1-Nov-17 Concrete Engineering-The Shard 12 Considerations: Working at Height Double hoist arrangement for access Three Level Rig Enclosed “Box” Concrete pumped – single stage pumping Safety Regime Welfare Emergency Procedures Features: 24 Hour Operation 15m plus rise per week (day shift) 35t per day reinforcement 130 cube per metre rise Stair access through rig Control for instant positioning 25mm tolerance Crane Mounted on Rig
- 13. 1-Nov-17 Concrete Engineering-The Shard 13
- 14. The Shard of Glass Project: Features: • 3 levels rig, • 2 placing booms • Rig crane Section through Slipform Upper deck Working deck Trailing deck 1-Nov-17 Concrete Engineering-The Shard 14
- 15. Working deck 1-Nov-17 Concrete Engineering-The Shard 15
- 16. 1-Nov-17 Concrete Engineering-The Shard 16
- 17. Trailing deck. 1-Nov-17 Concrete Engineering-The Shard 17 Good finish direct Straight lines Sharp corners Instrument box No finishers Temp. monitoring
- 18. The Slipform Manager on upper deck 1-Nov-17 Concrete Engineering-The Shard 18
- 19. Slipform Concrete 1-Nov-17 Concrete Engineering-The Shard 19 Concrete C50/60 Cementitious 450 kg/m3, 0-30% PFA Aggregate Torr quarry, Limestone Marine sand 48% Plasticizer Sky 569 (PCE type, BASF) w/c ratio 0.36 <~35 floor S4+ >~35 floor F6 Setting time 1.5 to 6h P-T slab at height Spec: C 50/60 Level 41-50 C 35/45 Level 50-72 Pipeline Accessability All concrete at height will be C50/60 for pumping.
- 20. Strength in external wall (800mm) ConTeSt prediction 1-Nov-17 Concrete Engineering-The Shard 20 Mid Surface Average SL 10 17°C 0.5m/s 10°C 1m/s 7°C 3m/s 20°C 0.5 m/s Trailing deck 10°C 0.5 m/s Concrete ~5MPa (frost resistant ) Concrete ~35 MPa when leaving the rig but still dominant over prevailing condition
- 21. Post Tensioned Slabs (40-72) 1-Nov-17 Concrete Engineering-The Shard 21 Risks in Construction 1. In- Situ concrete Construction 2. High component count (bolts, nails etc) 3. Falsework and Formwork 4. Materials and Hand Tools 5. Ply Sheets 6. Reinforcement 7. Slab Edge Tensioning 8. Risk of falling Objects - Full Screen Enclosure Challenges Safety Screen Methodology and Principles Edge protection Weather Risk PT methodology Concrete Pumping Movement of Materials and striking
- 22. The Shard of Glass Full Screen Enclosure • Design principle options – Average line – Climb & step 1-Nov-17 Concrete Engineering-The Shard 22
- 23. 1-Nov-17 Concrete Engineering-The Shard 23 Full size Mock-up Screen
- 24. 1-Nov-17 Concrete Engineering-The Shard 24 Screens jumpt generally at Night
- 25. Pour in Progress 1-Nov-17 Concrete Engineering-The Shard 25
- 26. The SHARD: PT-slab pour The View and Wind is free! 1-Nov-17 Concrete Engineering-The Shard 26 • First tensioning 10 MPa next morning • Final tensioning 25 MPa ~next afternoon STrength Assessment in Real Time Frost blankets !
- 27. 1-Nov-17 Concrete Engineering-The Shard 27
- 28. 1-Nov-17 Concrete Engineering-The Shard 28