Erecting Foundations Under Water (2)
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Transcript of Erecting Foundations Under Water (2)
A Presentation on……
Construction of Under Water Structures
ByYatiraj V. Gharse
M0810C02Construction Techniques
College of Engineering, Pune
ContentsErecting Foundations Under
WaterUnder Water Tunnel Construction Caisson for SeaworksUnder Water Construction Using
MembranePalm Islands
Erecting Foundations Under Water
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.
Erecting Foundations Under Water
Material:Piles Shell of steelSandTremie concrete
Under Water Tunnel Construction
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.
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.
Under Water Tunnel Construction Materials:Plain concreteR.C.CFabrics such as Nylon, PVCInert fluid (water) Reactive fluid (concrete)
Caisson for Seaworks
Caisson for SeaworksIntroduction:A caissons is used in constructing
seaworks which comprises. of compartments for receiving ballast
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.
Caisson for SeaworksMaterialsGranular material (pebbles)Laminated nylonLiquid ballastCementSand
Under Water Construction Using Membrane
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
Under Water Construction Using Membrane
This method is used for construction of a breakwater or an island providing a work area above it.
Under Water Construction Using Membrane
MaterialsMembrane (Nylon fabric coated
on both sides with abrasion resistant neoprene rubber).
SandCement
Palm Islands
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.
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.
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.
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.
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.
ReferencesFree patent online.comPatentstrorm.comUnderwaterstructure.comPalm Islands - Wikipedia, the free
encyclopedia.mhtRainbowing - Wikipedia, the free
encyclopedia.mht
Thank You