Maglev
Maglev| railsystem.net
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 →|
This page will be continuously updated… Accelerometer A device that can measure acceleration generated by the movement of an object along an axis. Adhesion (Coefficient of) During rolling contact, the … Continue reading →|
The track irregularities and their interaction with wheel generate vibration of varying amplitude and frequency. These vibrations may cause damage to different parts of the vehicle if not contained and … Continue reading →|
The running rails in a DC electrified traction system are one of the main sources of electromagnetic disturbance to internal and external metallic structures and installations, such as civil works (viaducts … Continue reading →|
The umbrella arch is a temporary support system forming a structural umbrella from the insertion of an assortment of longitudinal support members installed from within the tunnel, above and around … Continue reading →|
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 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 →|
A prestressed grouted ground anchor is a structural element installed in soil or rock that is used to transmit an applied tensile load into the ground. Grouted ground anchors, referenced simply … Continue reading →|
Jet Grouting is a versatile erosion based system used to create in situ engineered geometries of soil-cement generally with limited required access. Jet Grouting creates in-situ columns of grouted soil … Continue reading →|
Most railroads use track circuits to determine which sections of track are occupied by trains. These devices are actually fairly simple in design, and have been in use since 1872. … Continue reading →|
A door in which the panel or panels, in the open position, are positioned parallel to and outside of the car body. Plug doors can be of the sliding plug … Continue reading →|
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 →|
Balise is an electronic beacon or transponder placed between the rails of a railway as part of an automatic train protection (ATP) system. Transmission device (passive transponder) that can send telegrams (or tele-powering) … Continue reading →|
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 →|
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 →|
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 →|
An axle counter is a device on a railway that detects the passing of a train between two points on a track. A counting head (or detection point) is installed … Continue reading →|
A. Material Handling A.1. Overhead Travelling Crane Cranes are employed for lifting and lowering materials and moving materials in a rectangular area. A.2. Jib Crane Jib crane enable lifting and lowering … Continue reading →|
A train depot is where trains are stabled and maintained. The depots have infrastructure to maintain the rakes with necessary facilities viz stabling lines, scheduled inspection lines, workshop for overhaul, unscheduled maintenance … Continue reading →|
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, 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 →|
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 →|
On warm days, rails in direct sunshine can be as much as 20 degrees centigrade above air temperature. As rails are made out of steel, they expand as they heat … Continue reading →|
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 →|
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 →|
Braking Mechanisms When a braking force is applied to stop the cars, the force must be transmitted to something other than the cars, for example, to the rails. The braking … Continue reading →|
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 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 →|
Heavy-duty escalators are used in mass railway transit systems as rapid transit (metro), LRT. A. Design Criteria A.1. Operational requirements Hours of operation shall be considered as 24 hours per day, seven … Continue reading →|
Secant pile walls are formed by constructing intersecting reinforced concrete piles. The secant piles are reinforced with either steel rebar or with steel beams and are constructed by either drilling … Continue reading →|
Diaphragm wall is a continuous wall constructed in ground in to facilitate certain construction activities, such as: As a retaining wall As a cut-off provision to support deep excavation As … Continue reading →|
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 →|
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 →|
In October 28, 1995, an electrical failure led to a fire on one of the trains in Baku’s Metro. The electrical failure caused a fire in the fourth of five … Continue reading →|
The section insulator (SI) is a device installed in the catenary system for electrical separation of two electrical feeds while allowing for the passage of a vehicle pantograph, such as … Continue reading →|
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 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 →|
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 →|
A scroll compressor (also called spiral compressor, scroll pump and scroll vacuum pump) is a device for compressing air or refrigerant. In rolling stocks, scroll compressor is used for HVAC … Continue reading →|
To ensure that the path required for the passage of trains is kept clear along the route of a railway, a “structure gauge” is imposed. This has the effect of … Continue reading →|
Turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with turnouts, including switch rods and gauge plates. Crossover … Continue reading →|
A coupler, or coupling, is a device for joining rail vehicles in a train. There are two different kinds of couplers in the units: Automatic couplers on both unit ends (driver … Continue reading →|
A derailment is said to take place when a vehicle (for example a train) runs off its rails. This does not necessarily mean that it leaves its track. Although many … Continue reading →|
A buffer stop or bumper is a device to prevent railway vehicles from going past the end of a physical section of track. The design of the buffer stop is dependent in part upon the … Continue reading →|
Rolling stock originally referred to the vehicles that move on a railway. It usually includes both powered and unpowered vehicles, for example locomotives, railroad cars, coaches, and wagons. Rolling Stock Components 1- Car body Car body shell … Continue reading →|
Pantograph is an apparatus which mounted on the roof of electric train to collect power through with an overhead tension wire. It lift or down on the basis of the … Continue reading →|
Any device used to secure running rails into chairs or baseplates or directly to sleepers, bearers or other rail supports. Rail fastenings keeps rails fastened to sleepers (transfer of forces), … Continue reading →|
The 2012 Buenos Aires rail disaster, also known as the Once Tragedy, occurred on 22 February 2012, when a train crashed at Once Station in the Balvanera neighbourhood of Buenos … Continue reading →|
In mechanics terms, a bogie is a frame work which carrying wheels attached to coaches. The bogie, or truck as it is called in the US, comes in many shapes … Continue reading →|
The Santiago de Compostela rail disaster occurred on 24 July 2013, when an Alvia high-speed train travelling from Madrid to Ferrol, in the north-west of Spain, derailed at high speed … Continue reading →|
The weight of a rail per length is an important factor in determining rails strength and hence axleloads and speeds. Weights are measured in pounds per yard or kilograms per … Continue reading →|
When applied to the reduction of Iron oxides, the exothermic reaction generates sufficient energy to raise the reaction product temperature to in excess of 3,000°C at which both the metal … Continue reading →|
The European Rail Traffic Management System (ERTMS) is an initiative backed by the European Union to enhance cross-border interoperability and the procurement of signalling equipment by creating a single Europe-wide standard for train control and command … Continue reading →|
The rigid catenary is an Overhead Contact System (OCS) that can replace, with many advantages, the contact wire with sustentation wire, the third rail or the suspended bimetallic T-rail. It … Continue reading →|
In metro systems, automation refers to the process by which responsibility for operation management of the trains is transferred from the driver to the train control system. There are various … Continue reading →|
The track on a railway (non-US) or railroad (US), also known as the permanent way, is the structure consisting of the rails, fasteners, sleepers and ballast (or slab track), plus … Continue reading →|
Railway platform A railway platform is a section of pathway, alongside rail tracks at a railway station, metro station or tram stop, at which passengers may board or alight from trains or trams. Almost all rail stations have … Continue reading →|
Platform screen doors (PSDs) and platform edge doors (PEDs) at train or subway stations screen the platform from the train. They are a relatively new addition to many metro systems around the world, some having been … Continue reading →|
A third rail is a method of providing electric power to a railway train, through a continuous rigid conductor placed alongside or between the rails of a railway track. It … Continue reading →|
The New Austrian Tunneling method (NATM) was developed between 1957 and 1965 in Austria. It was given its name in Salzburg in 1962 to distinguish it from old Austrian tunnelling … Continue reading →|
A tunnel boring machine (TBM) also known as a “mole“, is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. … Continue reading →|
Accelerator A substance added to concrete/shotcrete to accelerate setting. Adit A tunnel driven from ground surface to provide access to or drainage from underground workings; a length of tunnel driven … Continue reading →|
Location: Daegu, South Korea Fire Event: 18 February 2003 A subway train was set on fire with gasoline, destroying two trains and causing large casualties of 192 deaths and 148 injuries at … Continue reading →|
Classification of railway accidents, both in terms of cause and effect, is a valuable aid in studying rail (and other) accidents to help to prevent similar ones occurring in future. … Continue reading →|
The Kaprun disaster was a fire that occurred in an ascending railway car in the tunnel of the Gletscherbahn 2 railway in Kaprun, Austria, on 11 November 2000. The disaster … Continue reading →|
Construction Methodology In a cut and cover tunnel, the structure is built inside an excavation and covered over with backfill material when construction of the structure is complete. Cut and … Continue reading →|
The International Association of Public Transport (or UITP) defines metro systems as urban passenger transport systems, “operated on their own right of way and segregated from general road and pedestrian … Continue reading →|
A funicular, also known as a funicular railway, incline, inclined railway, inclined plane, or cliff railway, is a cable railway in which a cable attached to a pair of tram-like … Continue reading →|
Commuter rail, also called suburban rail, is a passenger rail transport service between a city center, and outer suburbs and commuter towns or other locations that draw large numbers of … Continue reading →|
High-speed rail (HSR) is a type of passenger rail transport that operates significantly faster than the normal speed of rail traffic. Specific definitions by the European Union include 200 km/h … Continue reading →|
Light rail or light rail transit (LRT) is a form of urban rail public transportation that generally has a lower capacity and lower speed than heavy rail and metro systems, … Continue reading →|
A rubber-tyred metro is a form of rapid transit system that uses a mix of road and rail technology. The vehicles have wheels with rubber tires which run on rolling … Continue reading →|
Personal rapid transit (PRT), also called personal automated transport (PAT) or podcar, is a public transportation mode featuring small automated vehicles operating on a network of specially-built guide ways. PRT … Continue reading →|
A monorail is a rail-based transportation system based on a single rail, which acts as its sole support and its guideway. The term is also used variously to describe the … Continue reading →|
A people mover or automated people mover (APM) is a fully automated, grade-separated mass transit system. The term is generally used only to describe systems serving relatively small areas such … Continue reading →|
