01-11-2014, 02:10 PM
Abstracts: Looking to the past records of airport engineering there is increased demand of good runways. It is essential to explore all possibilities by proper selection of pavement used for runways, during preliminary design stage. Investigations have indicated that design of airport terminals is easy as compared to the design of the airport runways. This makes runways and its design an integral part of airport engineering. Runways are the main component of airways as they provide a platform for the movement of passengers and transfer of goods from the plane at the airport. The runway at an airport is used for takeoffs and landings. Runway pavement surface is prepared and maintained to maximize friction for wheel braking and even to know the amount of stress the aeroplane puts on the soil and how much stress can be taken by the soil pavement. Airport pavements are constructed to provide adequate support for the loads imposed by airplanes and to produce a firm, stable, smooth, all-year, all-weather surface free of debris or other particles that may be blown or picked up by propeller wash or jet blast. In order to satisfactorily fulfil these requirements, the pavement must be of such quality and thickness that it will not fail under the load imposed. In addition, it must possess sufficient inherent stability to withstand, without damage, the abrasive action of traffic, adverse weather conditions, and other deteriorating influences. Airport pavements should provide a skid resistant surface that will provide good traction during any weather conditions. To produce such pavements requires a coordination of many factors of design, construction, and inspection to assure the best possible combination of available materials and a high standard of workmanship. In this project work, flexible pavement has been designed using the software FAARFIELD. For flexible pavement design, FAARFIELD uses the maximum strain at the top of the sub-grade as the predictors of pavement structural life. FAARFIELD provides the required thickness for all individual layers of flexible pavement (surface, base, and sub-base) needed to support a given airplane traffic mix over a particular sub-grade. With proper design and construction, any pavement type (rigid, flexible, composite, etc.) can provide a satisfactory pavement for any civil airplane. However, some designs may be more economical than others and can still provide satisfactory performance.