Early 1991, a series of fundamental track gage widening tests were performed on mainline quality track at the Transportation Test Center in Pueblo, Colorado. The primary objectives of these tests were to obtain fundamental knowledge about the manner in which wheel drop derailments occur, to establish data about current rail and track quality, to test and validate various derailment criteria, and to provide a means for the continued measurements of these criteria. Both static and dynamic TLV tests were conducted to measure and determine the shape of typical restraint curves for the track classes in present use and the lateral rail head deflection under combinations of vertical and lateral load. Tests carried out to failure showed that in order to overturn the rail, it is necessary to disconnect both ends of the rails between the trucks and push at the center at laterall loads in excess of the friction force at the tie-plate/railbase interface. Tests showed that single lateral load applied to the track is very unlikely to cause a rail to overturn even at L/V ratios in excess of 5.
Wheel drop derailment testing using the track loading vehicle
Prüfung der Entgleisungsgefahr unter Verwendung des Schienenbelastungsfahrzeugs
1991
9 Seiten, 8 Bilder, 16 Quellen
Conference paper
English
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