Jointless Track

Jointless Track

 

arbitrary designation of a railroad track on which the distance between the rail joints greatly exceeds the length of a standard rail. Jointless track is intended to withstand temperature tensions that are considerably higher than those faced by an ordinary railroad track (up to 150 meganewtons per sq m) and which arise in the rails as a result of variations in air temperature. In the USSR jointless track is made in lengths up to 800 m. Jointless track became widespread in foreign countries in the 1950’s and in the USSR in the 1960’s. Rail lengths for this type of track are manufactured from standard (25-m) rails by welding at the enterprises (bases) or immediately at the laying site. Jointless track is distinguished by its high performance quality (which permits the high-speed movement of trains), riding comfort for passengers, and a reduction in expenses for maintenance of track and rolling stock. More than 10,000 km of jointless track have been laid in the USSR (1968).

REFERENCE

Al’brekht, V. G. Besstykovoiput’ i dlinnye rel’sy. Moscow, 1967.

Z. L. KREINIS

References in periodicals archive ?
The upgrade includes the introduction of a new signalling system of 385 jointless track circuits to detect train position, maintain safe separation distances and deliver train headways capable of meeting the extremely demanding timetable.
The jointless track circuits that had been installed were causing problems for a variety of reasons.
The challenge was to design, integrate and install an intelligent remote-condition monitoring system that could perform real-time analysis of voltage and frequency for all jointless track circuits across the 45km length of the Victoria line.
The Victoria line deploys variable length frequency-driven tuned electrical jointless track circuits that energise and de-energise as trains traverse the line.
Jointless track circuits (JTCs) are a key component of train control systems (TCSs) and are used for train detection.
Ruan, "The adaptability analysis of jointless track circuit for ballastless track," Electric Railway, z1, 2006.
Mu, "A comprehensive fault diagnosis method for jointless track circuit based on genetic algorithm," China Railway Science, Vol.
Once the CITYFLO 450 systems enter operation during the second phase, the existing conventional equipment will be replaced as well by new state-of-the-art devices including EBI Track jointless track circuits and EBI Switch 700 electro-hydraulic point machines as well as LED (Light Emitting Dials) type signals.
Invensys Rail will also install automatic train stop equipment, WESTRACE electronic interlockings, FS3000 jointless track circuits, level crossing safety systems, GSM-R voice and data communications, and a Central Traffic Control Centre in Balikesir.
The replacement of insulated block joints with a more reliable system of jointless track circuits
The Dimetronic solution involves Westrace Electronic Interlocking systems, FS3000 jointless track circuits, LED-type wayside signals and a Rail 9000 Centralized Traffic Control (CTC) situated at Ankara station.
Furthermore, jointless tracks are less subject to wear and thus last longer.