Burj al arab (Cofferdam&Rigging)
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A short presentation of cofferdam and rigging operations carried out on this ambitious project:Burj Al Arab.
Burj al arab (Cofferdam&Rigging)
- 1. Burj Al Arab Cofferdam & Rigging Firas Al Shalabi & Sunny Mahajan CE 505 Project Presentation 1
- 2. Background Dubai, UAE 1994 – 1999 The first 7 stars hotel in the world The start of Dubai’s new vision of attracting new investments in areas outside the oil industry. If you want to book a night there it will cost you around $2000 (according to Expedia tonight is $2039) 1.2 million SF 321 meters height from the sea. 2
- 3. The construction Two main phases: The manmade Island (our focus) The building 3
- 4. Building the island Temporary tube piles driven into sea bed Temporary sheet piles and tie rods driven into sea bed to support boundary rocks Tubular pile Sheet pile wall 4
- 5. Building the island Permanent boundary rock bunds (rock armor) deposited on both sides of the sheet piles Hydraulic fill layers deposited between bunds to displace sea water and form the island No solid ground under the building just weak sand (up to 180 meters deep with no solid ground). So it was decided to go with friction piles. Rock armor Sand fill 5
- 6. Building the island Permanent SHED units placed around the island to dissipate the action of waves and protect it. 2M (6.5 ft) diameter 43 M (141 ft) deep piles were driven through the island and sea bed SHED units Main building piles 6
- 7. Building the island Excavations began in the island to remove the hydraulic fill A coffer dam was being built while excavating 2M (6.5 ft) thick concrete plug slab laid on the base of the island to prevent the base from popping out because of the sea pressure Reinforced concrete retaining wall built The construction of the basement started Concrete slab 7
- 8. Completed Island Completed in three years 8
- 9. Diagonal truss rigging Huge tubular triangular truss geometry The Diagonal vary from 76m to 90m in length and weigh 160 to 180 ton. The Diagonal connects with a 300mm diameter pin connection to the core-wall and the Rear-leg structure. There are six diagonals erected at different levels on both side of the building transported as a single fabricated piece from the fabrication shop 15 km away by special self propelled long trailers. 9
- 10. Diagonal truss rigging Dealing with the expansion about (2 inches)caused by the desert heat Strand jacks supported by Cat heads were connected to the building to execute the lifting of the Diagonals and Horizontals. 10
- 11. Summary Many forces can destroy your temporary structures. You have to count them all. The safety of the crew is essential for cofferdams construction. Rigging elements can’t always be easy and can be more complicated than what we learned Putting things in the air is a different story. Have to come up with practical innovative on site solutions for uncertain problems 11
- 12. Thank you References: • Nathan. D., (2006) “Burj Al-Arab, UAE Structural Steel Construction For A Mega Project.” master builder, 3rd quarter 77-80 http://www.mbam.org.my/mbam/images/MBJ3Q06(pdf)/@BurjAlArb.pdf • Burj Al Arab, mega structures show. http://www.youtube.com/watch?v=RGzSNZudEHw • Stonecypher. L., (2009). Building the tallest hotel: Burj Al Arab, Dubai. http://www.brighthub.com/education/homework-tips/articles/57599.aspx#imgn_3 • Pourabedin. E., (2009). Burj Al Arab construction. http://www.slideshare.net/shahrozalam210/burj-alarab1203786822334454 • Wright. T., (2000).Creating the Burj Al Arab Dubai http://wkkarchitects.com/#/burj-al-arab/ 12