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A SEMINAR ON PALM ISLAND CONSTRUCTION

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siddharth kshirsagar

on 9 April 2014

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Transcript of A SEMINAR ON PALM ISLAND CONSTRUCTION

A SEMINAR ON
PALM ISLAND CONSTRUCTION

BY :- Neha Divakar Damle. TE CIVIL GUIDE: Prof. P.B.Kodag.

Contents
Purpose

Vision

The design

Challenges

Outline of the structure

References

PALM JUMEIRAH
Wonderful and Audacious
project of the globe


PURPOSE AND VISION
1.To increase the shoreline
2.To promote the tourism
3.New Source of Income

Extend Coastline
Task – Nakheel
Constructions
(held by
government
of Dubai)
Circular Island Increases
Coastline by 7 kms


THE DESIGN
Paradise Island – shape of a Palm Tree with Crescent shape Breakwater
- Coastline – Increased
by 56 kms
- 9 times more than
circular island.

HIGHER VISION
Circular Island – extra 7 kms

Why not 70 kms?
Back to Drawing Board
Prince works on Design- to increase beachfront
Culturally relevant and symbolic
THE CHALLENGE
To Blend with surroundings – island must be entirely made of natural materials, SAND and ROCKs ONLY.
Engineers must race against time and battle constantly against nature by earthquakes, violent storms and erosion from the sea.
Every day, engineers tried to prevent the destruction of what they built.
Project Timeline
1st Stage
Year 2000: Project Announcement
Year 2001-03: Breakwater Construction
2nd Stage
Year 2003: Land Reclamation Completion
Year 2004-06: Constructing City
3rd Stage
Year 2006: Partial Completion
Year 2008: Final Completion

BREAKWATER CONSTRUCTION
Coastal Researchers and Environmentalists
Experts in Land Reclamation – The Dutch Team
Developers - Nakheel Properties and Project Manager – Robert Berger
Engineers – Best from Northern Europe and Holland
Laborers – All over the globe

Sand - 94 million cu. Mts.
Rock - 5.5 million cu. Mts.

Barges, Tugboats, Dredgers, Heavy Land based Machine, Floating Cranes, etc
Satellite
GPS Technology

3 massive dredgers take up a thin layer of sand from the barren sea bed nearby.

Dump the sand in a layer up to 7.4 mts thick.

This is done while the sea is at its calmest.

To keep it in place, barge-loads of
rubble are dropped on top of this.

This bed of rock will raise the
breakwater from 4m below sea level
to 3m above.

Sourcing Rock - blasted out of the mountains.
Rocks are piled onto barges and shipped to the construction site.
Each Rock - 6 tons.
40,000 tons of rocks are delivered per day.
The density, size, strength and permeability of each boulder is crucial.
Positioned by cranes, each rock must interlock with the next to withstand the full force of the sea.





Desert sand - wrong material, too fine particles to cling together.
Sand: coarse, packs densely and is more resistant to wave impact.
Sand found at 6 miles out at sea.
Pumped through a pipe and sprayed into place at 10 mps.
This process is called Rainbowing.
The rainbowed sand builds into a sandbar, rising up to 4mt out of the water.







Shaping Accurately – using state-of-the-art technology.
Team of five men - walks the perimeter of the island every day as it takes shape.
Heavy packs strapped at back, these mobile receivers create a grid reference for the island.


August 2002: Mould Palm
Shape Accurately
Receiving signals from
space and a fixed position
on land, the height and position
of the sand bars is recorded
With these
coordinates,
dredgers can
sail into the exact position and rainbow the sand with pinpoint accuracy.

GPS Technology
October 2002:
Water Stagnant
Sea not circulating around.



Tides are not flushing the system properly.



Clean water is not moving fast enough round the inner waterway.




The water is in serious danger
of becoming stagnant.
2 four-lane bridges link the sections of the breakwater.

2 Breaks in sea wall.

-2 openings - enough fresh flowing
water can get into system.
-Twice a day, the tide enters the structure, pushing clean water around the fronds.


2 weeks - the entire waterway is replenished
December 2003: Wake-up Call

Bam in Iran - earthquake measuring a massive 6.6

It's a wake-up call to the palm island project.

If the epicentre hits Dubai, it could spell disaster.

As the sand compacts, it
pushes the water between
the particles upwards, making the ground liquefy
Lateral forces of an earthquake
can make the island disappear.
This terrifying phenomenon is
called liquefaction.


It happens when a quake shakes
the Earth's surface, causing less
cohesive sand particles to move.
It means the island would sink
back into the sea.

Strong Base:
Support this city at sea.
Before any houses can
be built, Island must be
made strong enough to
prevent it from liquefaction.
The engineers worked out, they needed to compact a layer of sand 12 mts deep, too deep to compact by normal road roller.
The only solution is a process called Vibrocompaction.

1
.15 machines - to firm up the land.
Probes drill over 200,000 holes into the ground across the surface of the island.
2
.High-pressure water and air drives each probe deep into
the earth
3
.This shaft then vibrates, shaking the ground around it.
The earth is compacted.
4.
As the sand compacts and sinks, more sand is
poured in until the area around the probes is rock
solid.
5
.It takes the team 8 months to stabilize the 17 palm fronds, but it has to be done to ensure the safety of 120,000 people who will live and work here













































Thousands of trucks and cranes,
tons of supplies,and 2,000 labourers
descend on the island.
This is the most complicated part of the project, the installation of the infrastructure.
Gas pipes, electricity cables, water supply and buildings.In two years, they must build
an entire city at sea.


The Trunk: The trunk consists of many shoreline apartments,
2 major roads, bridges and monorail at its centre.

The 17 Fronts: These are leaf shaped
part of the island consisting thousands
of villas on the two sides with private
beach and a road in the middle.

The Crescent: It is the curved shape around the palm island whose total length is of 12kms. The famous hotel ATLANTIS is located at the middle of the crescent.
The Crescent: It is the curved shape around the palm island whose total length is of 12kms. The famous hotel ATLANTIS is located at the middle of the crescent.

The palm island puts DUBAI on the MAP.

So far, the palm island is completely SOLD OUT.

The island stands here against the nature, proving that engineers can and will continually push the boundaries of engineering technology, and how a perfect management and effective utilization of all resources can create wonders in world.

The palm island is truly an awesome mega structure the world have ever seen.

References
National Geographic documentary

Wikipedia
Full transcript