Recommandé
Contenu connexe
Tendances
Tendances (20)
En vedette
Similaire à Seminar presentation Burj Khalifa
Similaire à Seminar presentation Burj Khalifa (20)
Dernier
Dernier (20)
Seminar presentation Burj Khalifa
- 1. Presented by : Aazam Nirban Civil Engineering Department T. Y. Civil 3105 Presentation on BURJ KHALIFA
- 2. The Burj Khalifa is the ever built tallest man made structure. This tower rises in the sky to 828m carrying 162 floors. The Burj khalifa took 6years for its construction and was completed in the year 2010. For erecting this city in the sky several new technologies had to be used. INTRODUCTION
- 3. The soil stratum of Dubai is very week so they had to excavate up to 50m deep to get a hard rock structure But the rock that they found was fragile and saturated with ground water So that any hole made will be cured immediately EXCAVATION
- 4. The engineers filled this with a viscous polymer slurry This pushes the rock and the ground water to the edges of the boreholes to keep it open This slurry is denser than water and liter than concrete, so that when concrete is pumped the concrete displaces the fluid and forms the foundation. 194 piles were constructed for avoiding the sinking of this structure. EXCAVATION Cont.
- 5. The casting of the whole structure is mainly done by two materials 1. Concrete 2. Steel Over 30,000 tons of steel were used About 250,000 m2 concrete was also used The reinforced concrete acts as the backbone of the whole structure CASTING OF THE STRUCTURE
- 6. The Burj can accommodate about 35,000 people at a time Consist of 57 elevators and 8 escalators The biggest elevator carries about 46 people at a time These elevators travel at a speed of 35km/hr The Burj has a service/firemans elevator which have a capacity to hold about 5,500kg And this is the worlds tallest service elevator. ELEVATORS AND ESCALATORS
- 7. The Burj is cladded with high-tech glass which forms as a curtain wall If the whole cladding has to be done with high- tech glass which will cost about 100 million dollars CLADDING OF THE TOWER
- 8. The cladding should withstand the heavy sand storms that with in include water and dust Prototypes were selected and with the help of propellers artificially created storm was allowed to hit the glass panels at a greater speed The glass panels withstands the storm up to 75km/hr TEST FOR THE CLADDING AGAINST STORM
- 9. As the building has to be built more than half a km, it had to challenge many factors that haven't faced by any other building Has to be completed with in the short period limit So the time was money For erecting such a structure in the sky steel and glass panels have to be raised This was done by cranes SPEED OF CONSTRUCTION
- 10. The cranes consist of two plates on the two sides It could jump from one floor to the another So that they were called the kangaroo cranes So as to speed up the construction the RCC walls was done in a simple and clever engineering way. Cranes
- 11. For simplicity and speed the engineers made no. of steel cages These cages were inserted to the formworks that can be moved easily After installation of cages concrete was filled in these formworks Only took 12hrs for the setting of concrete After setting the concrete the formworks would move to the next level with in 2hrs CASTING OF RCC WALLS
- 12. High performance concrete(HPC) Low permeability High durability C80-C60 cube strength concrete was used It includes fly ash, Portland cement Two largest concrete pumping machines in the world were used for this purpose For reducing cracks due to high temperature concreting was done only at night So that air is cooler and humidity is higher with ice added to the mix CONCRETE USED
- 13. The pump needs 630HP to pump about 25000 tons of concrete It had took about 14 mints for reaching the concrete to the 150th floor They completed every new floor in 3 day CONCRETE USED Cont.
- 14. Every year the storm attacks Dubai As the building grows much higher to the sky the top will be badly affected by the wind This causes a sway at the top floors of the building So that they studied many other skyscrapers The buildings must be in a definite shape WIND
- 15. They made a study on the Sears tower at Chicago The Sears tower had a layer of steel, and an another layer of steel which forms an exoskeleton to the building 9 such blocks were used in this Sears tower in definite shape So that the building was made rock solid SHAPE
- 16. Giving the Burj a exoskeleton was not a easy task So they designed the Burj in a triangular shape So that this was suitable to deflect the wind to different ways SHAPE Cont.
- 17. The three wings allow for greater building height by buttressing one another by a central core hence it is called buttressed core structural system This buttressed core is a six sided central piece So that it is called a Hexagonal Hub BUTTRESSED CORE
- 18. This hub is surrounded by the three wings These three wings afford the torsional resistance and the twisting of the tower This hub encloses the elevators BUTTRESSED CORE Cont.
- 19. The earthquake was one of the most important factor that had to be challenged by the Burj Khalifa Any unknown concept would collapse the whole structure They took the Taipie101 tower for their study EARTHQUAKE
- 20. A year twice China is affected with earthquakes The Taipei 101 was raised up with 36 steel tubes They were filled with concrete for their rigidity TAIPEI 101
- 21. These columns were holding together with outrigger trusses So that these elastic bands would recover the whole movement occurred to the building TAIPEI 101 Cont.
- 22. Providing such bands was not so practical for Burj According to Uniform Building Code(UBC) ,Dubai was classified under a zone 2a Moderate seismic activity The Burj would resist up to 6 in the Richter scale Because of the massive reinforced concrete skeleton EARTHQUAKE Cont.
- 23. The attack against the world trade centre at sept2001 shows the importance of evacuation in skyscrapers How tall the skyscrapers grow makes the evacuation much harder The Burj is different and have a perfect evacuation system EVACUATION
- 24. The Burj is naturally fire resistant as the concrete backbone is already fire resistant More than that the Burj consist of refuge rooms These refuge rooms are made of RCC and fire proof sheets that resist the heat up to 2hrs These refuge rooms has a special supply of air which pumps through fire resistant pipes There are 9 refuge rooms, one in every 30 floors EVACUATION Cont.
- 25. The Burj Khalifa is one of the unique tallest building that was built by man For rising such a city in the sky several new techniques have been used The buttressed core structural system has made a great change in the structural system of skyscrapers A strong buttressed core will initiate the height of the skyscrapers The construction of the Burj Khalifa proves that height doesn't matter any civil engineering construction. CONCLUSION
- 26. THANK YOU