Railways Airports Harbour Notes Civil 6th Semester Notes, CE 6604 Railways Airports Harbour Notes . Anna University Civil 6th Semester Notes and syllabus are downloading. Regulation 2013 as well we provided important 2 marks and 16 marks questions with answer for all units. Here you will get notes for all units.
Railways Airports Harbour Notes Civil 6th Semester Notes
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Fish plates are used in rail joints to maintain the continuity of the rails and to allow for any expansion or contraction of the rail caused by temperature variations. They maintain the correct alignment of the line both horizontally and vertically.
When a train moves round a curve, it is subjected to centrifugal force acting horizontally at the center of gravity of each vehicle radially away from the center of the curve. This increases the weight on the outer rail. To counteract the effect of centrifugal force, the level of the outer rail is raised above the inner rail by a certain amount to introduce the centripetal force. This raised elevation of outer rail above the inner rail at a horizontal curve is ‘called super elevation’
Railways Airports Harbour Notes
When straight tracks or curved tracks of the same or different gauges cross each other at an angle less than 90 degree, a diamond shape is formed. So this crossing is called as diamond crossing.
When two adjacent parallel or diverging tracks, which may be straight or curved, are connected by two sets of turnouts, with or without a straight length between them, the connecting line is known as cross-over.
A yard is defined as a system of tracks laid usually on a level within defined limits, for receiving, storing, making up new trains, dispatch of vehicles and for other purposes over which movements are not authorized by a time table. The various movements on a system of tracks are governed by prescribed rules, regulations and signals.
The dead end of a siding or the end of any track of terminal station is not kept bare but a form of stop or barrier is provided at the end of the track, to prevent the vehicles, from running off the track. This stops or barrier provided at the end, across the track of a siding or at terminal station is known as “Buffer stop”.
It indicates a defined area of the airport to accommodate aircrafts for loading and unloading of cargo and passengers, parking, refueling, etc. It is usually paved and is located in front of the building or adjacent to hangers.
It is not possible to get the direction of opposite wind parallel to the center-line of the runway length everyday or throughout the year .For some period of the year at least, the wind may blow making some angle ө with the direction of the center-line of the runway length. If V km ph is the velocity of the inclined opposing wind, its component V sine, which is normal to the centerline of the runway length, is called the crosswind component.
The turning zone is the area of airport other than the approach area and it is intended for turning operations of the aircraft in case of emergencies like failure of engine or trouble in smooth working of aircraft experienced at the start of the takeoff.
The building or buildings which are meant for providing facilities to all passengers, for serving as office for airport management and for carrying out other non- aeronautical functions are known as terminal buildings. They act as the focal points of the terminal area.
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