Tag Archives: railway
Sanding Systems
While conditions leading to poor adhesion have been well investigated, methods for addressing the problems have not. The main adhesion enhancer used on railway networks world wide is sand. Sanding is … Continue reading
Railway Signalling Terms
This page will be continuously updated… Absolute Block A system of controlling rail traffic, where (under normal operations) only one train is allowed in the Block Section at a time. Proof … Continue reading
Drill and Blast Method
Drill and blast method is mostly used method for the excavation throughout the world. The method can be used in all types of rocks and the initial cost is lower … Continue reading
Rail-wheel Lubrication
Rail and wheel wear can be reduced dramatically by proper lubrication. In addition, lubrication can help in saving energy and reducing noise. Rail-wheel lubrications applies by automaticly or manually. Advantages of automatic lubrication; Maintenance … Continue reading
Electric Traction Systems
The system which use electrical power for traction system i.e. for railways, trams, trolleys, etc. is called electrical traction. The track electrification refers to the type of source supply system that … Continue reading
Traction Systems
A system which causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives, steam engine drives, electric motors, etc. … Continue reading
Switch Heaters – Hot Air Blower
Gas, All-Electric or Oil fueled high pressure heating unit forces hot air throughout the switch area via ducts and nozzles. Complete systems designed and proven for rugged service in severe weather. Keeps switches open and … Continue reading
Submerged Floating Tunnel
Tunnels in water are by no means new in civil engineering. Since about 1900, more than 100 immersed tunnels have been constructed. Bridges are the most common structures used for … Continue reading
Immersed Tube Tunnel
Immersed tube, also called Sunken Tube, technique of underwater tunneling used principally for underwater crossings. The method was pioneered by the American engineer W.J. Wilgus in the Detroit River in … Continue reading
Rail Gauges
The gauge of a railway track is defined as the clear minimum perpendicular distance between the inner faces of the two rails. The different gauges can broadly be divided into … Continue reading
Energy efficiency – Replace lamps with more energy efficient ones
Since many metro and light rail stations were built in the 20th century, lighting in many stations is conventional. That means that lighting with fluorescent lighting tubes and (incandescent) light … Continue reading
Guard Rail
Guardrails (also known as guard/ girder/ restraining/ check rails) are used in transit systems to reduce rail wear in sharp curves and to increase the track’s resistance to flange climb … Continue reading
Heavy-Duty Elevator – Machine Room Less
Heavy-duty elevators are used in mass railway transit systems as rapid transit (metro), LRT. A. Design Criteria A. Operational requirements Hours of operation shall be considered as twenty-four (24) hours … Continue reading
Sheet Pile Wall Construction
Sheet pile walls are retaining walls constructed to retain earth, water or any other filling materials. These walls are thinner in section compared to masonry walls. Sheet pile walls are … Continue reading
Critical Velocity for Smoke Control
The ventilation system would be operated to force the smoke and hot gases in the direction of the empty tunnel to provide a clear and safe environment behind the fire … Continue reading
Simulation Software Categories for Tunnel Ventilation Systems
Software applications used for the design of tunnel ventilation systems fall into two general categories: onedimensional onedimensional, also known as network analysis, and two or three-dimensional CFD. In network analysis, … Continue reading
Flash-butt Welding
The welding process is in principle a regulated electric short circuit with the two rail ends functioning as D.C. poles. The high current produces an arc between the rail ends, … Continue reading
Sliding Doors
Sliding Doors A door in which the panel or panels slide open and closed on a hanger mechanism that is usually mounted above the doorway opening. A sliding door system … Continue reading
O’Hare CTA station train crash (2014)
On March 24, 2014, a Chicago Transit Authority (CTA) passenger train overran the bumper at O’Hare subway station, injuring 34 people. The cause is under investigation. The front car of … Continue reading