The Greatest Contemporary Development Feat Of Dubai
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A little way off the shore of Dubai are four remarkable islands in the form of giant palm trees: Palm Jumeirah, Palm Jebel Ali, and Palm Deira, still under construction. Each is comprised of necks of land extending from a trunk abutting to the Dubai seashore, and capped further outward by a great seawall for protection. It must have needed very many geotechnical consultants to make the necessary analyses of the site’s seabed, each geotechnical consultant an expert in seabed engineering. Because creating an island from loose undersea sand will take a lot of engineering expertise even before whatever can be put down on record, before making any tangible construction.
The Palm Jumeirah Crescent or jetty is only 13 feet above the sea height at low tide, and ascends from 34 feet of water at its deepest site. Its engineers contend that it is elevated enough not to sink in the going up of the sea level should global warming really happen, or any tsunamis that might develop in the Persian Gulf. The jetty is formed from rocks blasted from the mountains. At its bottom is sand wrapped by a geo-textile or meshed fabric to inhibit the sand from moving out. Anchoring down this ‘wrapped’ sand is a stratum of one-ton rocks, over which two strata of six-ton rocks sit to be the top part.
The peninsulas extending from the central avenue are created also from sand dredged from the seafloor and then vibro-compacted to bear buildings. Palm Jumeirah was created from 3,257,212,970.389 cubic feet of sand. Vibro-compacting is performed by saturating the sand with water then vibrating it via probes to make the sand settle more thickly. initially a probe is buried into the sand below the surface through water saturation and vibration. As the probe reaches its desired depth, loose sand is tossed down into the opening made by the vibrator probe. Thus a denser zone of sand is created, sufficient to hold up construction.
But, vibro-compaction may be appropriate only in clean sand where silt matter constitutes only 15% at the most.
In eery peninsula or frond are two rows of private land or buildings for the awfully rich, and anyone can buy his property there. Palm Jumeirah is expected to have 120,000 residents and workers, plus a different 20,000 tourists every day. So it is not really a small island where solitude can be found, but a gigantic self-sufficient sub-urban area of the really, really wealthy. There are at present residents living in the islands: real property owners, vacationers, businessmen and laborers making last touches to a few parts of the built up areas. A six-lane highway today functions as the transport artery in and out the fronds, but in the final stages, inhabitants will also be serviced by a rail transport system.
Palm Jumeirah and the other man-made islands illustrate what modern engineering backed by a lot of money can accomplish. While land building from the sea to create islands may not be a new idea because it has been made many instances before, the project’s massive size causes it so.