Articles published in the issue 10, 2016

ACTUAL PROBLEMS OF CONFIRMING RAIL TESTING

Keywords: confirming non-destructive rail testing, ultrasonic, magneto dynamic and visual testing methods, mobile (flaw detector carriages and flaw detector railcars) and removable testing means, flaw detectors for confirming testing, compliance of defectograms to railway track coordinates, analysis stages of defective sections.

Molotkov Sergey Lvovich — main specialist on defectoscopy, JSC «Radioavionica» (St. Petersburg), level III NDT certification.

E-mail: molotkov@radioavionica.ru

Abstract. In some times the carrying of the confirming testing is required after the complete rail testing performed by mobile (flaw detector carriages and flaw detector railcars) or removable means. The volume of the confirming testing is significantly increased in recent years. The article is devoted to the problems occurring in the process of the given testing (compliance of defectograms to railway track coordinates, different analysis stages of the defective sections) and their decisions. Confirming testing means are stipulated.

Optimizations of laying and operations of sleepers BF70S in short radius curves

Keywords: short radius curve, sleepers BF70S, ease curve, rail fastenings, “Pandrol Fastclip”, elimination of widening, elimination of superelevation.

Ovchinnikov Aleksey — PhD in Technical Sciences, Tashkent Institute of Railway Engineering, e-mail: ovchin-alex@mail.ru

Rasulev Alisher — PhD in Technical Sciences, Tashkent Institute of Railway Engineering, e-mail: ovchin1616@mail.ru

Fazilova Zulfiya — PhD in Technical Sciences, Moscow Institute of Railway Engineering, e-mail: fazil_1905@mail.ru

Abstract. The article contains data of the research of operation of sleepers BF70S with elastic fastenings Pandrol Fastclip in short radius curves and suggestions on optimizations of laying and operations of the mentioned track structure in short radius curves on the railways of Uzbekistan.

THE EVALUATION FOR COMPACT OF THE CRUSHED ROCKFILL BALLAST FOUNDATION BY THE TRACK MAINTENANCE MACHINE

Keywords: crushed rockfill ballast foundation, compact by vibrations, track maintenance machine, dynamic track stabilizer, indexes of compact quality, on board system for evaluation of compact quality, lateral displacement resistance of track grid, relative settlement by compaction of ballast foundation.

Popovich Maximilian — Ph.D., professor of chair «Lifting-transportation, track maintenance and construction machines», Petersburg State Transport University (PSTU).

 E-mail: mvpopovich@mail.ru

Volkovoinov Boris — Ph.D., assistant professor of chair «Lifting-transportation, track maintenance and construction machines», PSTU.

E-mail: b.volkovoynov@yandex.ru

Atamanjuk Alexander — Ph.D., assistant professor of chair «Lifting-transportation, track maintenance and construction machines», PSTU.

E-mail: alexanderataman@mail.ru

Bondarenko Igor — director of science-factory firm «Electronical control systems and devices» (NPO «ESUP»). E-mail: ivbond2@mail.ru

Abstract. The paper contains analysis of evaluation methods for the compact state of the crush rockfill ballast foundation of railway track by the on board control system on the track maintenance machine - dynamic track stabilizer. Besides of the regular board system of the evaluation quality of compaction by the index of lateral displacement resistance of track, paper suggested to arrange the dynamic track stabilizer by the board system, executed index measurement for the relative compacting settlements along track. A priori information about index state before machine work passes can be quantity minimize.