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Construction Technology Essay

3121 words - 12 pages

- Introduction -The house used for this project is located in north London, Brimsdown, and judging on the design of the house and the location, I think the house was built between 1900 - 1910. Thus it was constructed in the Victorian/ Edwardian period. I came to this conclusion by talking to neighbours and visiting local libraries and doing further research. During this project my aim is to analysis the key features of the building shown below, as you can see the house is terraced.- Substructure -FoundationsI think the best place to start the project is on the substructure of the building. As said in the introduction my thoughts of this building, is that it was made during, 1900-1910, based on this period, I will find out what type of foundations were used.Foundations are the part of the building which is in direct contact with the ground. They transmit to the soil, all the load from the building. They are designed to support the walls and the roof and to provide a solid base on which to build the house. The type of foundation chosen will depend on two variables: the total building load, ie, the weight of the house, and the type and quality of the subsoil. Image below demonstrates how the pressure is released onto the soil.Types of basic Foundations;* StripStrip foundations are the most common type used because they offer good strength for their cost. They are created by excavating a trench deep enough to avoid damage to the foundation caused by changes in the topsoil. Usually the trench has to be dug until clay is reached. The bottom of the trench is covered with at least 150mm of concrete. Once the footings are complete, cavity walls are built up to finished ground level, either in brick/block or, block and the trench and cavity are backfilled up to finished ground level.There are three types of strip foundation - traditional shallow strip, wide strip, deep strip.The one being used, all depends on the type of soil, and weight loading capacity. The heavier the load, and weaker the soil, the wider/deeper the trench for the foundation has to be.* RaftRaft foundations cover an area at least the same sizes as the base of the building. They are used on soft compressible subsoil such as soft clay or peat. However, it is important that they are well reinforced to resist the effect of ground movement.* PilePile foundations are used to support buildings in subsoil conditions such as shrinkable clays, infill or waste tips, slopes and sites with a high water table in a poorly drained region. They are a substitute where conventional foundations would need to be so deep that they would be uneconomical. In effect, a basic pile foundation is a series of stilts or columns, which rest on a solid, load bearing layer of the soil up to 4m below the surface. The piles may either be precast, or cast in situ, ie: on the site.In the analysis of the structure, it was found that the original foundation could be brick/ Strip foundation. Again I had to use the library as a...

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