erecting foundations under water (2)

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A Presentation on…… Construction of Under Water Structures By Yatiraj V. Gharse M0810C02 Construction Techniques College of Engineering, Pune

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Page 1: Erecting Foundations Under Water (2)

A Presentation on……

Construction of Under Water Structures

ByYatiraj V. Gharse

M0810C02Construction Techniques

College of Engineering, Pune

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ContentsErecting Foundations Under

WaterUnder Water Tunnel Construction Caisson for SeaworksUnder Water Construction Using

MembranePalm Islands

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Erecting Foundations Under Water

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Erecting Foundations Under Water Introduction:This is a simple & economical

method by which concrete structures can be erected in tidewater or other location under water, without subjecting any part of the structure to alternate submersion & exposure during setting.

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Erecting Foundations Under Water

Material:Piles Shell of steelSandTremie concrete

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Under Water Tunnel Construction

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Under Water Tunnel Construction

Introduction:This method uses a double

layered flexible form & introduction of both an inert & a reactive fluid into spacing of the form so as to produce both the shape & the basic structure of the tunnel.

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Under Water Tunnel Construction It is the method for the

construction of an underwater tunnel without underground excavation.

It provides a method of underwater construction without on site assembly of work for the basic structure of the instant tunnel.

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Under Water Tunnel Construction Materials:Plain concreteR.C.CFabrics such as Nylon, PVCInert fluid (water) Reactive fluid (concrete)

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Caisson for Seaworks

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Caisson for SeaworksIntroduction:A caissons is used in constructing

seaworks which comprises. of compartments for receiving ballast

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Caisson for SeaworksThe advantage of using this

method is to built seawork without using floating equipment& divers.

The work can be, for instance, protective dykes, elements of artificial island.

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Caisson for SeaworksMaterialsGranular material (pebbles)Laminated nylonLiquid ballastCementSand

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Under Water Construction Using Membrane

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Under Water Construction Using Membrane

Introduction:This method involves

constructing free standing structure in water, comprising impervious membrane.

This membrane is partially filled with

nonhardenable particulate

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Under Water Construction Using Membrane

This method is used for construction of a breakwater or an island providing a work area above it.

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Under Water Construction Using Membrane

MaterialsMembrane (Nylon fabric coated

on both sides with abrasion resistant neoprene rubber).

SandCement

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Palm Islands

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Palm Islands Introduction:Palm Islands are artificial

peninsulas constructed of sand dredged from the bottom of the Persian Gulf .

The islands are the Palm Jumeirah,, the Palm Jebel Ali and the Palm Deira.

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Palm IslandsThe 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 large rock breakwater. The breakwater of the Palm Jumeirah has over 7 million tons of rock. Each rock was placed individually by a crane, signed off by a diver and given a GPS coordinate.

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Palm IslandsThe reclamation project of the Palm

Jebel Ali includes the creation of a 4 km long peninsula, protected by a 200 m wide and 17 km long breakwater built around the island.

135,000,000 m³ of rock, sand and limestone were reclaimed (partly originating from the Jebel Ali Entrance Channel dredging works).

There are approximately 5,000,000 m³ of rocks in the slope protection works.

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Rainbowing Definition:Rainbowing is the process in

which a dredging ship propels sand that has been claimed from the ocean floor in a high arc to a particular location.

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RainbowingThis is used for multiple

purposes, ranging from building up a beach to prevent erosion to constructing new islands.

The name is derived from the appearance of the arc, which closely resembles a brown-colored rainbow.

This technique was notably used extensively in the construction of the Palm Islands.

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ReferencesFree patent online.comPatentstrorm.comUnderwaterstructure.comPalm Islands - Wikipedia, the free

encyclopedia.mhtRainbowing - Wikipedia, the free

encyclopedia.mht

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Thank You