How does Dubai build thier Islands in The Ocean?

Question

What do they use? How can they be sure it will erode away? What are thier Islands made from? Have you ever been there to that Palm-tree shaped Island?

Answer 1

They pile boulder rock into the ocean up to above the water surface,to form embankment of an island,...on the shape of palm tree.Then ,they filled with finer rock and sand to fill gap/voids...then they compact the rock embankment.
They use boulders by blasting rocky hills ,available in dubai.
Whereever necessary they put piling for foundations.
IT WILL NOT ERODE AWAY,SINCE THE STRUCTURE IS HEAVY ENOUGH(GRAVITY FORCE).
I havent been there,..but i will travel there for evaluating the sructural foundation there.

I hope this simplified answer help u a bit.

Answer 2

they used 1000's of tonnes of boulders to form the main structure under the sand then poured on heavy cement, then the sand was poured on top of that in a sand water mixture to get it to sink easier, one the sand broke the surface they used massive 30ft vibrating poles to get the sand to settle, once the sand had settled it had dropped about 1 meter in depth so they had to keep pouring more and more sand and ibrating to get it solid enough to build on top of, unlike a normal house u cant really dig intop this sand to lay founds so it had to be really really compact. they had to leave gaps so that the water flow was still available reduce direct erosion. if u look at either side of the palm theres erosion on one side and deposit of sand on the other, theyll have to keep moving the deposited sand back to replace the eroded sand but its not that big an issue. good old national geographic channel for this answer

Answer 3

"Explorer" answered this a couple months ago asked by "Ritu"- so I copied him (no source provided) I read about it awhile ago when I was looking at information about the owner of the Islands. I have never been on the Island but I've floated by them in a ship...


The Palm Islands in Dubai are the three largest artificial islands in the world, being constructed by Nakheel Properties in the United Arab Emirates. Each settlement will be in the shape of a palm tree, topped with a crescent, and will have residential communities and resorts built upon them. It is possible to make these islands due to the wide continental shelf off the Dubai coast, and the relatively shallow depth of the Persian Gulf.

The islands were designed as part of the plan to develop tourism in Dubai against the eventual depletion of the emirate's oil reserves, which are expected to be depleted in the second decade of the 21st century. The goal is to become one of the biggest areas in the world for tourism as a means of diversifying the economy.

Two of the islands—The Palm, Jumeirah, and The Palm, Deira—will be built by the Dutch company Van Oord Dredging from 80,000,000 m³ of sea bottom dredged from the approach channel. The Palm, Jebel Ali is being built by Jan De Nul.

Contents
1 Construction
2 Palm Jumeirah
2.1 Post-construction problems
3 The Palm, Jebel Ali
4 The Palm, Deira
5 See also
6 External links




Construction
The Palm Islands are technically artificial peninsulas constructed of sand dredged from the bottom of the Persian Gulf, which is conveniently narrow and shallow. The sand is sprayed by the dredging ships, which are guided by GPS, onto the required area in a process known as rainbowing. The outer edge of each Palm's encircling crescent is a huge breakwater constructed of carefully placed rocks that were collected by blasting.

Dutch scientists, because of their experience with changes made to the land in their own nation, were called in to study the area and perfect plans to make sure the Palms would remain intact over time and through storms. However, the owners refused to wait until the investigation was complete before ordering construction. After the Palm had been constructed, the Dutch scientists discovered that the tide did not reach all the way around the crescent with sufficient force to prevent stagnation of the water; it would become a haven for algae and mosquitos. The crescent was modified with two extra channels, each about a quarter of the way from either end. These channels allow greater scope for the action of the tide, and thus the water inside the Palm's boundary is replaced about every two weeks.


Palm Jumeirah

The Palm, Jumeirah.The Palm, Jumeirah began construction in June 2001 and was expected to be completed in 2006. Due to design changes the expected completion date is now December 2007 [1]. There are plans for three five-star hotels to be built on The Palm, Jumeirah, each with a distinctive national theme: Okinawa, Brazil, and Venice. The Palm's leaves will be covered in luxury holiday homes. When these went on sale in 2004, they were all sold within three days of being put on the market; notable purchasers include the Beckhams.

25°06′28″N, 55°08′15″E


Post-construction problems
The shape of the Palm has unwanted effects on the tidal currents. The current takes the shortest route around the Palm, and therefore does not flow naturally through either side. The water that does enter the Palm is no longer pushed by the current and therefores loses its energy and deposits all of the objects and particles it was carrying. This deposition is causing the build-up of a spit on the southwest side of the Palm, and as the water comes back down the northeast side, it is then forced to turn by the coastline. As the water turns, the coast acts as the outside bank in a river's meander: The water on the outside of the turn is traveling at greater speed than the water on the inside, and erodes the coastline much faster as a result. Currently, the owners are simply planning to shift the build-up to the indentations every couple of years to counteract this effect. It is presumed the other Palms will suffer similar trouble.


The Palm, Jebel Ali
The Palm, Jebel Ali began construction in October 2002 and is expected to be completed in late 2007. It is intended to be a tranquil place of rest. Once it has been completed it will be encircled by the Dubai Waterfront project, which is a series of islands in the shape of a curve of diminishing width. It includes boardwalks that circle the "fronds" of the "palm" and spell out an Arabic poem by Mohammed bin Rashid Al Maktoum:

Take wisdom from the wise
It takes a man of vision to write on water
Not everyone who rides a horse is a jockey
Great men rise to greater challenges
25°00′14″N, 54°59′02″E


The Palm, Deira
The Palm, Deira began construction in November 2004, but is expected to be delayed by five years due to problems in construction. The Deira Palm will be the largest of the three Palms and will cover an area greater than Manhattan.

25°20′00″N, 55°16′05″E

Answer 4

ohh have you been to google earth and seen them from up high, they look so cool
the material they use is sand, and they have built protective wall barriers around the island to reduce the erosion produced by the waves. however this does not stop the islands from being slightly degraded, so they are likely to be constantly maintaining the islands, by adding more sand