Tuesday 24 September 2013

Aqueduct

Aqueduct::


An aqueduct is an artificial channel through which water is transferred from one place to another. Aqueducts can be made of many different types of materials, such as brick, concrete, metal or wood, and constructed in a variety of ways, for instance as tunnels, canals or bridges. 




An aqueduct can transport a small amount of water as well as a large enough amount that watercraft can even be transported through it, and the water can be moved through the use of pumps or simply by gravity.

The main use of the aqueduct is to transport clean water to a large population of people, in a city for example, but they are also used to irrigate crops where little or no water naturally occurs. Still another use of the aqueduct is for transportation since they can allow large barges to pass over difficult terrain such as valleys and ravines. 

Most notably in the city of Rome, some aqueducts still stand and the ones that were once in operation were used to transport millions of gallons of water throughout Roman colonies each day. Other ancient cities that utilized the aqueduct were Jerusalem and Athens. In the latter city, there was an aqueduct that was a tunnel and was 4200 feet long and bored by hand. In more recent history, London built its first aqueduct in 1609 – a 38-mile long river that brought water to the growing population of the city.

Aqueducts are still in use today, but most are constructed of pipes and other materials. In New York City in 1842, the Croton Aqueduct used iron pipes to carry water across the Harlem River over a viaduct. Other similar large aqueducts followed in various cities throughout the world, especially around Britain. One modern aqueduct of note is the Colorado Aqueduct in southern California that carries water across the desert from the Colorado River. 

Underwater Tunnel Construction


Underwater Tunnel Construction::



Tunneling through soft rock and tunneling underground require different approaches. Blasting in soft, firm

 rock such as shale or limestone is difficult to control. Instead, engineers use tunnel-boring machines 

(TBMs), or moles, to create the tunnel. 
Tunnels built across the bottoms of rivers, bays and other bodies of water use the cut-and-cover method, which involves immersing a tube in a trench and covering it with material to keep the tube in place.
Construction begins by dredging a trench in the riverbed or ocean floor. Long, prefabricated tube sections, made of steel or concrete and sealed to keep out water, are floated to the site and sunk in the prepared trench. Then divers connect the sections and remove the seals. Any excess water is pumped out, and the entire tunnel is covered with back fill.

The tunnel connecting England and France -- known as the Channel Tunnel, the Euro Tunnel or Chunnel -- runs beneath the English Channel through 32 miles of soft, chalky earth. Although it's one of the longest tunnels in the world, it took just three years to excavate, thanks to state-of-the-art TBMs. Eleven of these massive machines chewed through the seabed that lay beneath the Channel. Why so many? Because the Chunnel actually consists of three parallel tubes, two that carry trains and one that acts as a service tunnel.

Unless the tunnel is short, control of the environment is essential to provide safe working conditions and to ensure the safety of passengers after the tunnel is operational. One of the most important concerns is ventilation -- a problem magnified by waste gases produced by trains and automobiles. Clifford Holland addressed the problem of ventilation when he designed the tunnel that bears his name. His solution was to add two additional layers above and below the main traffic tunnel. The upper layer clears exhaust fumes, while the lower layer pumps in fresh air. Four large ventilation towers, two on each side of the Hudson River, house the fans that move the air in and out. Eighty-four fans, each 80 feet in diameter, can change the air completely every 90 seconds.

Monday 23 September 2013

Backhoe Loader – Construction Equipment

Backhoe Loader – Construction Equipment

Also referred to as a loader backhoe, the backhoe loader is an engineering and excavation vehicle that consists of a tractor, front shovel and bucket and a small backhoe in the rear end. Due to the small size and versatility, backhoe loaders are common with small construction projects and excavation type work.Originally invented in Burlington Iowa back in 1857, the backhoe loader is the most common variation of the classic farm tractor.As the name implies, it has a loader assembly on the front and a backhoe attachment on the back.

Anytime the loader and backhoe are attached it is never referred to as a tractor, as it is not normally used for towing and doesn’t normally have a PTO.When the backhoe is permanently attached, the machine will normally have a seat that can swivel to the rear to face the backhoe controls.Any type of removable backhoe attachments will normally have a seperate seat on the attachment itself.Backhoe loaders are common and can be used for many tasks, which include construction, light transportation of materials, powering building equipment, digging holes and excavating, breaking asphalt, and even paving roads.You can often replace the backhoe bucket with other tools such as a breaker for breaking and smashing concrete and rock. There are some loader buckets that offer a retractable bottom, which enable it to empty the load more quickly and efficiently.

Backhoe-Loader 

The retractable bottom loader buckets are often times used for grading and scratching off sand.The front assembly on a backhoe may be either removable or permanently attached. Often times,the bucket can be replaced with other tools or devices. In order to mount different attachments to the loader, it must be equipped with a tool coupler. The coupler consists of two hydraulic cylinders on the end of the arm assembly, which can expand and retract to allow different tools to be attached to the unit. There are several types of backhoe loader brands,including New Holland, John Deere, and Case. Some will offer you cabs, while others won’t. The newer types of backhoe loaders even offer you air conditioning, radios, and other accessories that make you feel like you are working with luxury.Common with excavating jobs, the backhoe can serve many purposes. It can haul equipment and supplies in the loader bucket.Another great use is to cover up dirt when filling in trench lines or covering up pipe that was just put in the ground.The backhoe attachment at the rear is ideal for digging water pipes and sewer pipes.The best thing about the backhoe loader is the fact that they are easy to operate. You don’t need to be a rocket scientist to fully operate this nifty piece of equipment.

Bulldozer – Construction Equipment

Bulldozer – Construction Equipment

The bulldozer is a very powerful crawler that is equipped with a blade. The term bulldozer is often used to mean any type of heavy machinery, although the term actually refers to a tractor that is fitted with a dozer blade. Often times, bulldozers are large and extremely powerful tracked vehicles. The tracks give them amazing ground mobility and hold through very rough terrain. Wide tracks on the other hand, help to distribute the weight of the dozer over large areas, therefore preventing it from sinking into sandy or muddy ground.
 
Bulldozers have great ground hold and a torque divider that’s designed to convert the power of the engine into dragging ability, which allows it to use its own weight to push heavy objects and even remove things from the ground. Take the Caterpillar D9 for example, it can easily tow tanks that weight more than 70 tons. Due to these attributes,bulldozers are used to clear obstacles, shrubbery and remains of structures and buildings.

The blade on a bulldozer is the heavy piece of metal plate that is installed on the front. The
blade pushes things around. Normally, the blade comes in 3 varieties:
1. A straight blade that is short and has no lateral curve, no side wings, and can be used
only for fine grading.
2. A universal blade, or U blade, which is tall and very curved, and features large side wings to carry more material around.
3. A combination blade that is shorter,offers less curvature, and smaller side wings.

bulldozer

 
Modifications
Over time, bulldozers have been modified to evolve into new machines that are capable of things the original bulldozers weren’t. A good example is that loader tractors were created by removing the blade and substituting a large volume bucket and hydraulic arms which will raise and lower the bucket, therefore making it useful for scooping up the earth and loading it into trucks.Other modifications to the original bulldozer include making it smaller to where it can operate in small working areas where movement is very limited, such as mining caves and tunnels. Very small bulldozers are known as calfdozers.
 
History
The first types of bulldozers were adapted from farm tractors that were used to plough fields. In order to dig canals, raise earth dams, and partake in earthmoving jobs, the tractors were equipped with a thick metal plate in the front. Later on, this thick metal plate earned the name blade.

The blade of the bulldozer peels layers of soil and pushes it forward as the tractor advances.The blade is the heart and soul of the bulldozer, as it was the first accessory to make full use for excavation type jobs. As the years went by, when engineers needed equipment to complete larger jobs, companies such as CAT, Komatsu, John Deere, Case, and JCB started to manufacture large tracked earthmoving equipment.They were very loud, very large, and very powerful and therefore earned the nickname “bulldozer”.Over the years, the bulldozers got bigger, more powerful, and even more sophisticated. The important improvements include better engines,more reliable drive trains, better tracks, and even hydraulic arms that will enable more precise manipulation of the blade and automated controls.As an added option, bulldozers can come equipped with a rear ripping claw to break up pavement or loosen rocky soil.The best known manufacturer of bulldozer is CAT,which has earned a vast reputation for making
tough and durable, yet reliable machines.Even though the bulldozer started off a modified farmtractor, it rapidly became one of the most useful pieces of equipment with excavating and construction
.

Compact Excavator

Compact Excavator

The compact hydraulic excavator can be a tracked or wheeled vehicle with an approximate operating weight of 13,300 pounds.Normally, it includes a standard backfill blade and features an independent boom swing. The compact hydraulic excavator is also known as a mini excavator.

A compact hydraulic excavator is different from other types of heavy machinery in the sense that all movement and functions of the machine are accomplished through the transfer of hydraulic fluid.The work group and blade are activated by hydraulic fluid acting upon hydraulic cylinders.The rotation and travel functions are also activated by hydraulic fluid powering hydraulic motors.

Most types of compact hydraulic excavators have three assemblies – house, undercarriage, and the work group.

Compact_Excavator_image

House
The house structure contains the compartment for the operator, engine compartment, hydraulic pump and also the distribution components. The house structure is attached to the top of the undercarriage via swing bearing. Along with the work group, them house is able to rotate upon the undercarriage without limit due to a hydraulic distribution valve that supplies oil to the undercarriage components.

Undercarriage
The undercarriage of compact excavators consists of rubber or steel tracks, drive sprockets, rollers,idlers, and associated components and structures.The undercarriage is also home to the house structure and the work group.

Work group
The work group consists of the boom, dipper or arm, and attachment. It is connected to the front of the house structure via a swinging frame that allows the work group to be hydraulically pivoted left or right in order to achieve offset digging for trenching parallel with the tracks.

Independent boom swing
The purpose of the boom swing is for offset digging around obstacles or along foundations,
walls, and forms. Another use is for cycling in areas that are too narrow for cab rotation. Another major advantage of the compact excavator is the independent boom swing.

Backfill blade
The backfill blade on compact excavators are used for grading, leveling, backfilling, trenching, and general dozer work. The blade can also be used to increase the dumping height and digging depth depending on it’s position in relation to the workgroup.

The most common place you’ll find compact excavators is in residential dwellings. When digging phone lines or other things, these pieces of equipment are very common for getting between houses. Due to their small size, they can fit almost anywhere.Over the years, the capabilities for compact excavators have expanded far beyond the tasks of excavation. With hydraulic powered attachments such as breakers, clamps, compactors and augers, the compact excavator is used with many other applications and serves as an effective attachment tool as well. Serving many purposes, the compact excavator is a great addition to any job that requires the use of machinery.

 

Saturday 21 September 2013

Battersea Power Station in england


Battersea Power Station  in england::


Battersea Power Station is a decommissioned coal-fired power station located on the south bank of the River Thames in Battersea, an inner-city district of Southwest London. It comprises two individual power stations which were built in two stages in the form of a single building. Battersea A Power Station was built in the 1930s, and Battersea B Power Station, to its east, was built in the 1950s. The two stations were built with an identical design, providing the well-known four chimney layout. The station ceased generating electricity in 1983, but over the past 50 years it has become one of the best known landmarks in London and is Grade II* listed. The station owes much of its celebrity to numerous cultural appearances, which include a shot in The Beatles' 1965 movie Help! and the cover art of Pink Floyd's 1977 album Animals.

The station is the largest brick building in Europe and is notable for its original, lavish Art Deco interior fittings and decor. However, the building's condition has been described as "very bad" by English Heritage.

World's biggest mall


World's biggest mall in china::


The New South China Mall in Guangdong Province opened in 2005. With 5 million square feet of shopping area , the mall can accommodate 2,350 stores, making it the largest shopping center in the world in terms of leasable space -- more than twice the size of the mall in americk, the biggest shopping center in the United States. At the outdoor plaza, hundreds of palm trees blend in with a replica arc de trimophe a giant Egyptian Sphinx, fountains, and extensive canals with gondols.

The only problem is that the mall is virtually deserted. Despite the bombastic design and grand plans, only a handful of stores are occupied. Walking among shattered shops, with dusty corridors and escalators covered in soiled sheets, is like a walk through a ghost mall. Rubbish is piled up along the sides, paint is coming off of the walls, and store signs and advertisements have faded. The mall's indoor amusement park staff lay half asleep over counters, or kill time chatting with each other.

Friday 20 September 2013

Sci Fi Structures


 Sci Fi Structures::


These structures were commissioned by former Yugoslavian President Josip Broz Tito in the 1960s and 70s to commemorate sites where WWII battles had taken place (like Tjentište, Kozara and Kadinjača), or where concentration camps stood (like Jasenovac and Niš). They were designed by different sculptors (Dušan Džamonja, Vojin Bakić, Miodrag Živković, Jordan and Iskra Grabul, to name a few) and architects (Bogdan Bogdanović, Gradimir Medaković...), conveying a powerful visual impact to show the confidence and strength of the Socialist Republic. In the 1980s, these monuments attracted millions of visitors per year, especially young pioneers for their "patriotic education." After the Republic dissolved in early 1990s, they were completely abandoned and their symbolic meanings were forever lost.

From 2006 to 2009, Kempenaers toured around the ex-Yugoslavian region (now Croatia, Serbia, Slovenia, Bosnia and Herzegovina, etc.) with the help of a 1975 map of memorials, presenting before our eyes a series of melancholy yet striking images. His photos raise a question: can these former monuments continue to exist as pure sculptures? On the one hand, their physically dilapidated condition and institutional neglect reflect a more general social and historical fracturing.

Tuesday 17 September 2013

Various Types Of Cranes

Various Types Of Crane

A crane is a tower or derrick that is equipped with cables and pulleys that are used to lift and lower material. They are commonly used in the construction industry and in the manufacturing of heavy equipment. Cranes for construction are normally temporary

structures, either fixed to the ground or mounted on a purpose built vehicle.

They can either be controlled from an operator in a cab that travels along with the crane, by a push button pendant control station, or by radio type controls. The crane operator is ultimately responsible for the safety of the crews and the crane.


Mobile Cranes:
The most basic type of crane consists of a steel truss or telescopic boom mounted on a mobile platform, which could be a rail, wheeled, or even on a cat truck. The boom is hinged at the bottom and can be either raised or lowered by cables or hydraulic cylinders.

Mobile_Cranes


Telescopic Crane:
This type of crane offers a boom that consists of a number of tubes fitted one inside of the other. A hydraulic mechanism extends or retracts the tubes to increase or decrease the length of the boom.

Telescopic_Mobile_Crane


Tower Crane:
The tower crane is a modern form of a balance crane. When fixed to the ground, tower cranes will often give the best combination of height and lifting capacity and are also used when constructing tall buildings.

Tower_crane_picture


Truck Mounted Crane:
Cranes mounted on a rubber tire truck will provide great mobility. Outriggers that extend vertically or horizontally are used to level and stabilize the crane during hoisting.

Truck_Mounted_Crane_Knuckle_Boom_picture


Rough Terrain Crane:
A crane that is mounted on an undercarriage with four rubber tires, designed for operations off road. The outriggers extend vertically and horizontally to level and stabilize the crane when hoisting. These types of cranes are single engine machines where the same engine is used for powering the undercarriage as it is for powering the crane. In these types of cranes, the engine is normally mounted in the undercarriage rather than
in the upper portion.

Rough_terrain_crane_picture


Loader Crane:
A loader crane is a hydraulically powered articulated arm fitted to a trailer, used to load equipment onto a trailer. The numerous sections can be folded into a small space when the crane isn’t in use.

Loader_Crane_picture


Overhead Crane:
Also refered to as a suspended crane, this type is normally used in a factory, with some of them being able to lift very heavy loads. The hoist is set on a trolley which will move in one direction along one or two beams, which move at angles to that direction along elevated or ground level tracks, often mounted along the side of an assembly area.


Overhead_Crane_picture

In the excavation world, cranes are used to move equipment or machinery. Cranes can quickly and easily move machinery into trenches or down steep hills, or even pipe. There are many types of cranes available, serving everything from excavation to road work.

Cranes are also beneficial to building bridges or construction. For many years, cranes have proven to be an asset to the industry of construction and excavating. Crane operators make really good money, no matter what type of crane they are operating.

Forklift

Forklift

Sometimes called a forklift truck, the forklift is a powerful industrial truck that is used to lift and transport material by steel forks that are inserted under the load. Forklifts are commonly used to move loads and equipment that is stored on pallets. The forklift was developed in 1920, and has since become a valuable piece of equipment in many manufacturing and warehousing operations.

Types of Forklifts:
 
The most common type of design with forklifts is the counter balance. Other types of designs include the reach truck and side loader, both of which are used in environments where the space is at a minimum.

Forklift_construction_equipment

Control and capability:
 
Forklifts are available in many types and different load capacities. In the average warehouse setting,most forklifts have load capacities of around five tons. Along with the control to raise and lower the forks, you can also tilt the mast to compensate for the tendency of the load to angle the blades towards the ground and risk slipping it off the forks. The tilt will also provide a limited ability to operate on ground that isn’t level.There are some variations that allow you to move the forks and backrest laterally, which allows easier placement of a load. In addition to this, there are some machines that offer hydraulic control to move the forks together or further apart, which removes the need for you to get out of the cab to manually adjust for a different size load.

Another forklift variation that is sometimes used in manufacturing facilities, will utilize forklifts with a clamp attachment that you can open and close around a load, instead of having to use forks. Products such as boxes, cartons, etc., can be moved with the clamp attachment.

Safety:
 
Forklifts are rated for loads at a specified maximum weight and a specified forward type center of gravity. All of this information is located on a nameplate that is provided by the manufacturer and the loads cannot exceed these specifications. One of the most important aspects of operating a forklift is the rear wheel steering. Even though this helps to increase maneuverability in tight cornering situations, it differs from the traditional experience of a driver with other wheeled vehicles as there is no caster action. Another critical aspect of the forklift is the instability. Both the forklift and the load must be considered a unit, with a varying center of gravity with every movement of the load.You must never negotiate a turn with a forklift at full speed with a raised load, as this can easily tip the forklift over.

Front Loader – Construction Equipment

Front Loader – Construction Equipment

Also known as a front end loader, bucket loader, scoop loader, or shovel, the front loader is a type of tractor that is normally wheeled and uses a wide square tilting bucket on the end of movable arms to lift and move material around.The loader assembly may be a removable attachment or permanently mounted on the vehicle. Often times, the bucket can be replaced with other devices or tools, such as forks or a hydraulically operated bucket.

Larger style front loaders, such as the Caterpillar 950G or the Volvo L120E, normally have only a front bucket and are known as front loaders, where the small front loaders are often times equipped with a small backhoe as well and called backhoe loaders or loader backhoes.Loaders are primarily used for loading materials into trucks, laying pipe, clearing rubble, and also digging. Loaders aren’t the most efficient machines for digging, as they can’t dig very deep below the level of their wheels, like the backhoe can.

Front_loader_construction_equipment

The deep bucket on the front loader can normally store around 3 – 6 cubic meters of dirt, as the bucket capacity of the loader is much bigger than the bucket capacity of a backhoe loader. Loaders aren’t classified as excavating machinery, as their primary purpose is other than moving dirt.In construction areas, mainly when fixing roads in the middle of the city, front loaders are used to transport building materials such as pipe, bricks, metal bars, and digging tools. Front loaders are also very useful for snow removal as well, as you can use their bucket or as a snow plow. They can clear snow from the streets and highways, even parking lots.They will sometimes load the snow into dump trucks which will then haul it away.

Unlike the bulldozer, most loaders are wheeled and not tracked. The wheels will provide better mobility and speed and won’t damage paved roads near as much as tracks, although this will come at the cost of reduced traction. Unlike backhoes or tractors fitted with a steel bucket, large loaders don’t use automotive steering mechanisms, as they instead steer by a hydraulically actuated pivot point set exactly between the front and rear axles.This is known as articulated steering and will allow the front axle to be solid, therefore allowing it to carry a heavier weight.

Articulated steering will also give a reduced turn in radius for a given wheelbase. With the
front wheels and attachment rotating on the same axis, the operator is able to steer his load in an arc after positioning the machine, which can come in quite handy. The problem is that when the machine is twisted to one side and a heavy load is lifted high in the air, it has a bigger risk of turning over
.

Dump Truck – Construction Equipment

Dump Truck – Construction Equipment

Dump trucks or production trucks are those that are used for transporting loose material such as sand, dirt, and gravel for construction. The typical dump truck is equipped with a hydraulically operated open box bed hinged at the rear, with the front being able to be lifted up to allow the contents to fall out on the ground at the site of delivery.Dump trucks come in many different configurations with each one specified to accomplish a specific task in the construction chain.

dump_trucks_construction_engineering


Standard dump truck:
The standard dump truck is a full truck chassis with the dump body mounted onto the frame. The dump body is raised by a hydraulic ram lift that is mounted forward of the front bulkhead, normally between the truck cab and the dump body. The standard dump truck also has one front axle, and one or more rear axles which normally has dual wheels on each side. The common configurations for standard dump trucks include the six wheeler and ten wheeler.


Transfer dump truck:
For the amount of noise made when transferring, the transfer dump truck is easy to recognize. It’s a standard dump truck that pulls a separate trailer which can be loaded with sand, asphalt, gravel, dirt, etc. The B box or aggregate container on the trailer is
powered by an electric motor and rides on wheels and rolls off of the trailer and into the main dump box. The biggest advantage with this configuration is to maximize payload capacity without having to sacrifice the maneuverability of the short and nimble dump truck standards.


Semi trailer end dump truck:
The semi end dump truck is a tractor trailer combination where the trailer itself contains the hydraulic hoist. The average semi end dump truck has a 3 axle tractor that pulls a 2 axle semi trailer. The advantage to having a semi end dump truck is rapid unloading.


Semi trailer bottom dump truck:
A bottom dump truck is a 3 axle tractor that pulls a 2 axle trailer with a clam shell type dump gate in the belly of the trailer. The biggest advantage of a semi bottom dump truck is the ability to lay material in a wind row. This type of truck is also maneuverable in reverse as well, unlike the double and triple trailer configurations.


Double and triple trailer:
The double and triple bottom dump trucks consist of a 2 axle tractor pulling a semi axle semi trailer and an additional trailer. These types of dump trucks allow the driver to lay material in wind rows without having to leave the cab or stop the truck. The biggest disadvantage is the difficulty in going in reverse.


Side dump trucks:
Side dump trucks consist of a 3 axle trailer pulling a 2 axle semi trailer. It offers hydraulic rams that tilt the dump body onto the side, which spills the material to the left or right side of the trailer. The biggest advantages with these types of dump trucks are that they allow rapid unloading and carry more weight than other dump trucks.
In addition to this, side dump trucks are almost impossible to tip over while dumping, unlike the semi end dump trucks which are very prone to being upset or tipped over. The length of these trucks impede maneuverability and limit versatility.


Off road dump trucks:
Off road trucks resemble heavy construction equipment more than they do highway dump trucks. They are used strictly for off road mining and heavy dirt hauling jobs, such as excavation work. They are very big in size, and perfect for those time when you need to dig out roads and need something to haul the massive amounts of dirt to another location.

 

Syllabus for Civil Engineering (CE) for gate2014

ENGINEERING MATHEMATICS

Linear Algebra: Matrix algebra, Systems of linear equations, Eigen values and eigenvectors.
Calculus: Functions of single variable, Limit, continuity and differentiability, Mean value theorems, Evaluation of definite and improper integrals, Partial derivatives, Total derivative, Maxima and minima, Gradient, Divergence and Curl, Vector identities, Directional derivatives, Line, Surface and Volume integrals, Stokes, Gauss and Green’s theorems.

Differential equations: First order equations (linear and nonlinear), Higher order linear differential equations with constant coefficients, Cauchy’s and Euler’s equations, Initial and boundary value problems, Laplace transforms, Solutions of one dimensional heat and wave equations and Laplace equation.

Complex variables: Analytic functions, Cauchy’s integral theorem, Taylor and Laurent series.

Probability and Statistics: Definitions of probability and sampling theorems, Conditional probability, Mean, median, mode and standard deviation, Random variables, Poisson,Normal and Binomial distributions.

Numerical Methods: Numerical solutions of linear and non-linear algebraic equations Integration by trapezoidal and Simpson’s rule, single and multi-step methods for differential equations.

 

STRUCTURAL ENGINEERING

Mechanics: Bending moment and shear force in statically determinate beams. Simple stress and strain relationship: Stress and strain in two dimensions, principal stresses, stress transformation, Mohr’s circle. Simple bending theory, flexural and shear stresses, unsymmetrical bending, shear centre. Thin walled pressure vessels, uniform torsion, buckling of column, combined and direct bending stresses.

Structural Analysis:Analysis of statically determinate trusses, arches, beams, cables and frames, displacements in statically determinate structures and analysis of statically indeterminate structures by force/ energy methods, analysis by displacement methods (slope deflection and moment distribution methods), influence lines for determinate and indeterminate structures. Basic concepts of matrix methods of structural analysis.

Concrete Structures: Concrete Technology- properties of concrete, basics of mix design. Concrete design- basic working stress and limit state design concepts, analysis of ultimate load capacity and design of members subjected to flexure, shear, compression and torsion by limit state methods. Basic elements of prestressed concrete, analysis of beam sections at transfer and service loads.

Steel Structures: Analysis and design of tension and compression members, beams and beam- columns, column bases. Connections- simple and eccentric, beam–column connections, plate girders and trusses.Plastic analysis of beams and frames.

 

GEOTECHNICAL ENGINEERING

Soil Mechanics:Origin of soils, soil classification, three-phase system, fundamental definitions, relationship and interrelationships, permeability &seepage, effective stress principle, consolidation, compaction, shear strength.

Foundation Engineering:Sub-surface investigations- scope, drilling bore holes, sampling, penetration tests, plate load test. Earth pressure theories, effect of water table, layered soils. Stability of slopes-infinite slopes, finite slopes. Foundation types-foundation design requirements. Shallow foundations-bearing capacity, effect of shape, water table and other factors, stress distribution, settlement analysisinsands & clays. Deep foundations–pile types, dynamic &static formulae, load capacity of piles in sands &clays, negative skin friction.

 

WATER RESOURCES ENGINEERING

Fluid Mechanics and Hydraulics: Properties of fluids, principle of conservation of mass, momentum, energy and corresponding equations, potential flow, applications of momentum and Bernoulli’s equation, laminar and turbulent flow, flow in pipes, pipe networks. Concept of boundary layer and its growth. Uniform flow, critical flow and gradually varied flow in channels, specific energy concept, hydraulic jump. Forces on immersed bodies, flow measurements in channels, tanks and pipes. Dimensional analysis and hydraulic modeling. Kinematics of flow, velocity triangles and specific speed of pumps and turbines.

Hydrology: Hydrologic cycle, rainfall, evaporation, infiltration, stage discharge relationships, unit hydrographs, flood estimation, reservoir capacity, reservoir and channel routing. Well hydraulics.

Irrigation: Duty, delta, estimation of evapo-transpiration. Crop water requirements. Design of: lined and unlined canals, waterways, head works, gravity dams and spillways. Design of weirs on permeable foundation. Types of irrigation system, irrigation methods. Water logging and drainage, sodic soils.


ENVIRONMENTAL ENGINEERING

Water requirements: Quality standards, basic unit processes and operations for water treatment. Drinking water standards, water requirements, basic unit operations and unit processes for surface water treatment, distribution of water. Sewage and sewerage treatment, quantity and characteristics of wastewater. Primary, secondary and tertiary treatment of wastewater, sludge disposal, effluent discharge standards. Domestic wastewater treatment, quantity of characteristics of domestic wastewater, primary and secondary treatment Unit operations and unit processes of domestic wastewater, sludge disposal.

Air Pollution: Types of pollutants, their sources and impacts, air pollution meteorology, air pollution control, air quality standards and limits.

Municipal Solid Wastes:Characteristics, generation, collection and transportation of solid wastes, engineered systems for solid waste management (reuse/ recycle, energy recovery, treatment and disposal).

Noise Pollution: Impacts of noise, permissible limits of noise pollution, measurement of noise and control of noise pollution.

TRANSPORTATION ENGINEERING

Highway Planning: Geometric design of highways, testing and specifications of paving materials, design of flexible and rigid pavements.

Traffic Engineering: Traffic characteristics, theory of traffic flow, intersection design, traffic signs and signal design, highway capacity.

SURVEYING

Importance of surveying, principles and classifications, mapping concepts, coordinate system, map projections, measurements of distance and directions, leveling, theodolite traversing, plane table surveying, errors and adjustments, curves.

ANY OTHER THING ABOUT U KNOW PLEASE COMMENT.........


The Ryugyong


The Ryugyong (North Korea)



During the mid-1980s, North Korea wanted to change its image by building something massive, something that would be world-renowned. The project would symbolize progress for North Korea and introduce new, Western investors. 

 It was intended to be completed in 1989, in time for the 13th World Festival of Youth and Students, but developers would face nearly every conceivable hurdle, and by 1992 the project was abandoned.

Casinos, nightclubs, and fancy restaurants were encouraged. When the project was planned, the estimated cost to build the “largest hotel in the world” would be around $230 million.

Construction began in 1987, but by 1992 numerous delays and problems had driven the cost up to over $750 million, or 2% of North Korea's entire GDP. The building finally reached its full architectural height by 1992, but a broke government and a lack of foreign investors meant the project would be abandoned before completion. 

Had the hotel been finished as originally planned, it would have stood as the tallest hotel and the seventh tallest building in the world.

Monday 16 September 2013

Taj Mahal ; one of the top landmarks in the world.

Taj Mahal::


Taj Mahal, the pinnacle of Mughal architecture, was built by the Mughal emperor Shah Jahan (1628-1658), grandson of Akbar the great, in the memory of his queen Arjumand Bano Begum, entitled ‘Mumtaz Mahal’. Mumtaz Mahal was a niece of empress Nur Jahan and granddaughter of Mirza Ghias Beg I’timad-ud-Daula, wazir of emperor Jehangir. She was born in 1593 and died in 1631, during the birth of her fourteenth child at Burhanpur. Her mortal remains were temporarily buried in the Zainabad garden. Six months later, her body was transferred to Agra to be finally enshrined in the crypt of the main tomb of the Taj Mahal.

According to TripAdvisor's 2013 Travellers Choice Attractions Awards, Taj Mahal was ranked third in the list of Top 25 landmarks. 


Taj Mahal, listed among the new seven wonders of the world, is renowned the world over for its architecture and aesthetic beauty. 

In 1983, it became a Unesco World Heritage Site. The Taj Mahal attracts 2-4 million visitors annually, with more than 200,000 from overseas. 


In all, the Taj Mahal covers an area of 60 bighas, as the terrain gradually sloped from south to north, towards the river, in the form of descending terraces.


The main tomb of the Taj is basically square with chamfered corners. The minarets here are detached, facing the chamfered angles (corners) of the main tomb on the main plinth. Red sandstone mosque on the western, and Mehman-Khana on the eastern side of the tomb provides aesthetically a clear colour contrast.

Sunday 15 September 2013

'World's largest building' opens in China

The Largest Building Ever Constructed Has Opened in China

 

 The "New Century Global Centre" building opens to the public in Chengdu, southwest China's Sichuan province on June 28, 2013, the latest symbol of China's economic boom. 

The Largest Building Ever Constructed Has Opened in China

At what point does a building become a city? At 1.7 million square meters, the New Century Global Center lands somewhere between the two. 

New Century, which has been under construction since spring of 2012 (which isn't long, for a building of this size), opened officially on July 1. The 18-story, glass-and-steel frame structure sits above a new subway station in Chengdu, a Sichuan province city of more than 14 million and one of China's fastest-growing megalopolises. 

What will visitors find inside its glassy walls? It's actually fairly standard, as mega-structures go: A 14-screen IMAX theater, shops, restaurants, offices, hotels, a Mediterranean village reconstruction (duh), and finally, its pièce de résistance—a massive artificial beach that boasts realistic sunsets and sea breezes, thanks to a huge LED screen on one side. A 500,000-square-foot art center designed by Zaha Hadid is under construction next door. 

The Largest Building Ever Constructed Has Opened in China


 Here's a 15-minute promotional video about the centre:



The Largest Building Ever Constructed Has Opened in China
It's not so much what New Century contains as how much of it. It's hard to visualize numbers like 1.7 million square meters, so here are a few comparisons. You could fit three Pentagons inside its walls, or 20 Sydney Opera Houses. It's nearly 500,000 square feet larger than the building it beat out for the title, Dubai's International Airport Terminal 3. The largest building in the US, by comparison, is the Palazzo in Las Vegas, which comes in at #11 worldwide. 

It's worth pointing out that New Century isn't the first megastructure of its kind, though it is the largest. Architects and planners in China are pioneering the construction of entire urban regions from scratch. The title of world's largest structure, in that light, is really just a way for New Century's developers to distinguish it from the pack.
This faux seaside town offers 1,312 feet of "coastline," the world's largest artificial waves, and displays of sunrises and sunsets thanks to the world's largest LED screen--the 492 foot long and 131 foot tall backdrop of this ersatz resort. The artificial coastal area can accommodate 6,000 people and serves as the main attraction of the New Century Global Center.

Though mega-city Chengdu suffers from chronic smog, visitors to the center need not worry about the climate. "We have borrowed a Japanese technique," guide Liu Xun told the Sydney Morning Herald. "There will be an artificial sun that will shine 24 hours a day and allow for a comfortable temperature."

Friday 13 September 2013

The Petronas Towers

The Petronas Towers::




Height: 1,483 ft (452 meters)

Owners: Kuala Lumpur City Centre Holdings Sendirian Berhad
Architects: Cesar Pelli & Associates
Engineers: Thornton-Tomasetti Engineers
Contractors: Mayjus and SKJ Joint Ventures
Topping Out: 1998
Official Opening: August 28, 1999






 Although the project's developers, a consortium of private investors in association with the Malaysian government and Petronas, the national oil company, had not originally set out to surpass Chicago's Sears Tower, they did aspire to construct a monument announcing Kuala Lumpur's prominence as a commercial and cultural capital. In the design of American architect Cesar Pelli they found a winning scheme--twin towers of elegant proportions with a slenderness ratio (height to width) of 9.4--that would capture not only the title but the public imagination.




The structure is high-strength concrete, a material familiar to Asian contractors and twice as effective as steel in sway reduction. Supported by 75-by-75-foot concrete cores and an outer ring of widely-spaced super columns, the towers showcase a sophisticated structural system that accommodates its slender profile and provides from 14,000 to 22,000 square feet of column-free office space per floo.




In both engineering and design, the Petronas Towers succeed at acknowledging Malaysia's past and future, embracing the country's heritage while proclaiming its modernization. The end result, says Pelli, is a monument that is not specifically Malaysian, but will forever be identified with Kuala Lumpur.

Foundation

Foundation::

The structure, that transmits the load of the building to the soil


Choosing a kind of foundation depends on:
the ground conditions
the groundwater conditions
the site, the environment (the buildings nearby)
the structure of our building
Requirements:
structural requirements: safe, be able to carry the load of the building
constructional requirements: schedule, minimal resources, minimal cost

main 2 types ::

1  shallow


When is it applicable?
The load-bearing layer is near to bottom floor level
The loads of the building are light-medium

Types
Strip foundations
Pad foundations – Bucket foundations
Beam foundations
Mat (slab) foundations


2  deep


When is it necessary?
The load-bearing layer is in deeper location
The loads of the building are too heavy
Other special cases


Types
Piles
Slurry wall
Other