Underwater construction is a method on how to place the concrete underwater. During the construction of bridges, dams or any structure where the foundation is most likely to lie underwater, the underwater construction is opted. Construction in water poses many difficulties especially in the places where the depth is considerable. During underwater construction, the main objective is to create dry and water free environment for working so that the stability of the structure is balanced.

Underwater Construction techniques:
Caissons
Cofferdam ....etc

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Underwater Construction
Underwater Construction Corporation is driven to provide the best possible commercial diving services, including inspection, maintenance and repair, construction and rehabilitation, and technical support services. All services may minimize downtime and maximize budgets, and are completed efficiently with lasting result.

Commercial divers must be multi-faceted in their training, and are required to perform under extreme and inhospitable conditions.

An integral skill for any commercial diver is to have a firm unders ....etc

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construction of underwater tunneling and used recently new techniques ....etc

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Relative roles of CFD and wind tunnel testing in the development of aircraft

Introduction
CFD
CFD is computational technology that enables us to study the dynamics of things that flow.
Using CFD, a computational model that represents a system or device that we want to study is built. Then we apply the fluid flow physics to this virtual prototype, and the software outputs a prediction of the fluid dynamics.

Application
fluid flow, heat transfer , mass , phase change , chemical reaction, mecha ....etc

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Concrete is a composite material composed of coarse aggregate bonded together with a fluid cement which hardens over time. Most concretes used are lime-based concretes such as Portland cement concrete or concretes made with other hydraulic cements, such as ciment fondu. However, asphalt concrete which is very frequently used for road surfaces is also a type of concrete, where the cement material is bitumen, and polymer concretes are sometimes used where the cementing material is a polymer.
In Portland cement concrete (and other hydraulic cemen ....etc

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Aerodynamicists use wind tunnels to test models of proposed aircraft. In the tunnel, the engineer can carefully control the flow conditions which affect forces on the aircraft. By making careful measurements of the forces on the model, the engineer can predict the forces on the full scale aircraft. And by using special diagnostic techniques, the engineer can better understand and improve the performance of the aircraft.

Wind tunnels are designed for a specific purpose and speed range and there is a wide variety of wind tunnel types and model ....etc

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underwater structures construction ppt

Building anywhere brings its own set of environmental challenges. Creating skyscrapers in the middle of a bustling hub like Hong Kong or New York can be challenging for any experienced development team. How about creating a skyscraper in the middle of the ocean?
Marine or deep sea construction has a long history dating back to the first century Romans who used underwater cement to build artificial harbors.
Thanks to technological advances, builders have been making their marks on the other two-thirds of t ....etc

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Commercial divers must be multi-faceted in their training, and are required to perform under extreme and inhospitable conditions.

An integral skill for any commercial diver is to have a firm understanding of the principles of underwater construction and how this type of construction is utilized.

For instance, divers are often employed to weld on underwater structures - including pipelines, dams, bridge piers, and retaining walls - and the diver must be knowledgeable about the underwater construction techniques and tools which contribute t ....etc

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plz send me the seminar report on underwater construction ..tomorrow i have to submit ....etc

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pdf of civil engineering seminar underwater construction

ABSTRACT

Piles are structures used to transfer loads from superstructure to the sub surface strata. When the subsurface stratum is water based or if we deal with a hydraulic structure, the piles are to be driven into water and under water strata. Piles used in underwater structures are often subjected to corrosion. There is no absolute way to eliminate all corrosion; but corrosion protection measures are employed to control the effect of corrosion. Corrosion protection can be in diff ....etc

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