How Palm Island - The World’s Largest Artificial Island Was Built
Friday, November 14, 2008
Construction on the palm islands started in 2001. Divers surveyed the ocean floor and workers constructed a crescent-shaped breakwater from blasted mountain rock. The Crescent of Palm Jumeirah stands a little more than 13 feet above low tide ocean level and sits in 34 feet of water at its deepest point.Sand, covered by an erosion- forestalling water-permeable geo-textile, makes up the breakwater's lowest layer. One-ton rocks blanket the sand, and two layers of large rocks weighing up to six tons each cap the structure. A "toe" placed by a floating crane sits within the Crescent. The bulwark also has two 328-foot openings on each side to eliminate stagnation in the 16 narrow, deep channels. These gaps allow water to altogether circulate every 13 days.
Although five workers were swept off by a wave and one drowned, the designers at Nakheel believe the breakwater will protect the palm island from average gulf weather and even an enormous storm. They even indicate that villas barely 10 feet above sea level will be safe from the rising seas of global warming.
The palm islands themselves are made from sand dredged from the sea floor. Palm Jumeirah is built from 3,257,212,970.389 cubic feet of ocean sand vibro-compacted into place .Vibro-compaction increases the denseness of loose sand by saturating it with jets of water and vibrating it with probes.
To get the complex shape just right, designers and contractors use Differential Global Positioning Systems (DGPS) to plot the palm and ascertain the sand placement within 0.39 of an inch.
Palm Jumeirah is already jammed with villas and hotels, with some early buyers complaining that the plots are more closely spaced than they were led to believe. Buyers are a mixture of long-term residents, vacationists and speculators hoping to cash in on skyrocketing prices. When the island is complete, Nakheel expects 120,000 occupants and workers plus as many as 20,000 tourists a day. Construction workers lived on the fronds and in grounded cruise ships while building the island.
To facilitate touristry and make life easier for residents, the six-lane Sub-Sea Tunnel connects Palm Jumeirah to the mainland. Workers used a dam to drain the area and dig up the seabed before rereleasing the water. Developers have plans for a four-stop railroad that will race the length of the palm.
Posted byParvez Ahmed at 4:12 AM
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nicely detailed, more pictures!
so coooool :]
disgustin, jus competin 4 turists
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