Construction Techniques

Production of concrete requires meticulous care at every stage. The ingredients of good and bad concrete are same but good rules are not Observed it may become bad.

Manufacturing of concrete includes the following stages

1. Batching

2. Mixing

3. Transporting

4. Placing

5. Compacting

6. Curing

7. Finishing

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Civil Engineering: High rise construction and Form work

This video show how to efficiently manage the form works during the construction of buildings or structures.
WTF aluminum formwork is a rapid paced construction system for forming cast in place concrete structures. WTF provides aluminum formwork for reinforced concrete construction of single and multi-story buildings and enables the walls and slab to be placed monolithically in the same operation. This increases efficiency, and also produces an extraordinarily strong structure with excellent concrete finish.

Concrete Forms Construction of Reinforced Concrete Walls

Reinforced concrete walls construction for building a house. The Wall-Ties & Forms concrete forming system is helping concrete contractors build quality concrete homes rapidly, and cost effectivly. More concrete forming videos available at www.wallties.com.

Burj Khalifa (Burj Dubai) Construction - Animation - U.A.E.

Burj Khalifa Burj Dubai Construction - Animation - U.A.E.

http://www.burjdubaiskyscraper.com/

Slab Shuttering

Following picture shows the shuttering used for slabs.

 

This kind of steel shuttering is very useful as it reduces the plastering works. More over wooden logs are hard to remove and also cause breaking of edges. The steel shuttering when used with proper oiling is much easier to remove and also offers excellent finishing. All large projects use this kind of shuttering, only small house constructions are still using wooden planks and that too only in developing countries

Facts About Construction In India

# Sardar Sarovar Dam being executed by the group is the third largest in the world for volume of chilled concrete to be placed -nearly 7 million cum.

# Indira Sagar a 1000 MW Power house is the second largest surface power house in the country.

# Nathpa Jhakri a 1500 MW Power House is the largest underground power house in India.

# Tehri Dam is the third tallest rockfill dam in the world, and the largest in Asia invloving placement of over 25 million cum of all types of fill material.

# Baglihar Hydroelectric project involved construction of 30km of project road along with three bridges.

# Brahmaputra Guide Bund completed in a record time of 7 months.

# Baspa-II and Chamera-II projects involved continuous concrete shuttering for tunnel lining which is used for the first time in the country.

# Teesta V project has been provided with Jet Grouting curtain is being provided below the coffer dams for the first time in India.
# Alimineti Madhva Reddy Irrigation project is the longest underground face to face tunnel in the world.

Constructing An Underwater Tunnel

Channel Tunnel, one of the world's greatest tunnel is built beneath the famous English Channel and connects France and England. Find out more about the construction of this spectacular engineering feat in the article inside.

Introduction

The Channel Tunnel passes below the English Channel and connects England and France. The thirty-mile-long tunnel is located 250 meters below sea level. The Channel Tunnel, or "Chunnel" as it is called, is one of the longest tunnels in the world. There are acctually three tunnels involved. Two have rail tracks while the third is a service channel that is infrequently used for small vehicles. The idea of building this tunnel came at least hundred years before its construction. Even the construction work of the tunnel started at that time but was then stopped due to the fear of it being used as a medium to invade England. In 1970, the construction work again resumed and was finally completed in 1994.

Construction

The tunnels are fifty kilometers in length. All three were drilled through the rocks of the seabed of English Channel. The construction process started by digging the two main tunnels from both the sides of English Channel. A total of ten contractors worked simultaneously to achieve this spectacular engineering feat.

Various types of machines were used to drill the solid rocks beneath the channel. The two main tunnels have a diameter of 25 feet each, while the service tunnel has a diameter of 11 feet. The tunneling machines used were drilling machines that could chew and store the broken rocks and sediments by crushing them into small pieces. Most of these drills were air powered drills which moved on a predetermined path. As the boring machines moved forward digging the rocks, they sprayed high density concrete on the freshly dug tunnel walls to prevent sea water from seeping in. Excess of rubble from the broken tunnel was sent back to the land and out of the tunnel using a conveyor belt system.The tunnel was dug in a systematic preplanned manner which sloped downwards from both the sides. The service channel was also drilled in the same way by joining the two side tunnels once they were fully drilled.
Both the side tunnels have railway lines fixed inside it. The Eurostar passenger trains along with many cargo carrying trains use the railway lines. Using the tunnels, the trains can complete the journey between England and France is 20-35 minutes. The service tunnel in the middle is basically an emergency escape route that can be used in case of any fire or other similar accidents. Moreover, there are many cross over passages in between that allow trains to change tracks. The approximate speed of these trains is a hundred miles per hour.

Some Facts

The overall cost of the tunnel was around twelve billion dollars. Heavy vehicles can also use the tunnel but only through the special shuttle wagons. Moreover, air is supplied inside all the three tunnels through a special ventilation system. In 1996, a major fire took place in one of the shuttle wagons and thirty one people were trapped. However, everyone escaped because of the specially designed service tunnel.

The Channel Tunnel stands as a life line for both England and France. It is one of the most successful engineering feats that was considered almost impossible in the beginning. However, with perfect and precise planning from tunnel engineers and by using incredible civil engineering skills, this impossible task was brought to life to act a vital connectivity medium between two of the world’s most important countries.

3D Nature’s World Construction Set

photorealistic 3D terrain visualization for cartography,
architecture, civil engineering, golf, forestry and land planning.

Homepage :

http://3dnature.com/

Download :

http://3dnature.com/demo6.php

Construction: Foundations Connection

Construction of Bridge

Construction of Pre-fabricated Building Components Using Flyash

Abstract: In today’s world, where speed and convenience play a big part in influencing the use of any product, the age of prefabricated housing products seems to have finally arrived. The usefulness of these products help significantly in speeding up construction by offering ready-to-install building elements such as blocks, joist beams, roof blocks and panels is being widely recognised in the industry.

Pre-fabricated components are becoming immensely popular due to the several attractive advantages that they offer, such as off-site fabrication, which allows reduction in construction time and this function helps greatly in managing the schedule of the construction project. Due to their low density, the prefabricated components impose a relatively lighter load on the structure and superior quality can also be achieved as these components are manufactured under a strictly controlled environment.

In recent times few innovations in the field of materials are expected to make these products even more popular, user friendly and eco friendly. The present paper discusses on the manufacturing of prefabricated building components using fly ash, and explains regarding fabrication, centring, placing, applications and the advantages over the monolithic construction. This paper aims to popularize the promotion of prefabrication building methodologies for low cost housing by highlighting the different prefabrication components and techniques, and the economical advantages achieved by its adoption.

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http://www.ziddu.com/download/19563485/CONSTRUCTIONOFPREFABRICATEDBUILDING.pdf.html