Bridge building Essay Example | Topics and Well Written Essays - 2750 words

Bridge building - Essay Example However, some simple bridges are set on the ground without first installation of the supporting systems it is of importance to note that when this is done underground preparation has to be done. Every edge of the bridge is always tested to make sure that there is stability. Shoring and underpinning techniques are important to ensure that we come up with a stable bridge. For more stability, excavation of the soil as well as the backfilling of the soil is important however, it is not necessary. Piers are always laced vertically on the edges of the bridge to make sure that the bridge gets the correct support. To make these piers, we can use a range of materials ranging from masonry, steel, or concrete and to ensure that the base is stable, we have to embed it with concrete. Building the bridge When building a beam bridge, the bridge span is always made at a different place and then transported to the area where the bridge is to be made. The bridge is made by bringing together two concre te or steel girders that get support from some decking materials. To add weight, the bridges are made with grudges, which comprise solid beams and built with trusses that are webbed to provide support. A crane is then used to lift the bridge to the supports then it is welded to ensure that the bridge is firm. ... In a well made beam bridge, the forces do not exist. The main risk that may be found here is the accidental collapse of the bridge in case the bridge is not correctly placed on the supports, this leads to the bridge collapsing on the ground due to lack of support. To prevent this, ground engineers are useful in ensuring that the bridge is correctly placed on the supports. There are a number of considerations that have to be put in place to ensure that the construction is economically feasible as well as being environmentally friendly. First the bridge has to be made of materials that are not soluble in water since some of these bridges are placed above water channels and if the materials are water soluble then it will pollute the water below. We also have to weigh the costs of the materials to ensure that we use the cheapest materials that are available in the market. And all in all the workers have to know the right proportions of the materials that they are using so that there is n o wastage that occurs in the making of the bridges. Bolting The best bolting technique for this particular bridge is the shear connection method. In this type of bolting, a central plate is made to align with the central beam so that a hole is drilled inside it for the bolt to b able to get into it. To attach the shear connection, we use standard bolts shear bolts. Arch bridges Construction Construction of the arch bridge starts with the designing of the bridge. When designing, you have to have the arch and the roadway in the mind. Most of the known arches are found under the road, however it is important to know that some arches exists such that roads pass through them. All these have to be kept in mind during the design method. After the design, we have to prepare and