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Railway Track Maintenance and Emergency Repairs Guide

This guide outlines protocols for rectifying rail fractures, weld failures, switch expansion joint damage, and track buckling incidents on railways to ensure safety and efficiency. Learn about temporary and permanent repair procedures, handling breaches, and conducting inspections to prevent accidents.

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Railway Track Maintenance and Emergency Repairs Guide

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  1. LWR-9 Unusual Occurrences

  2. Unusual Occurrences • Rail fracture/weld failure • Replacement of defective glued joint • Damage to SEJ/Buffer rails • Buckling or tendency to buckling • Derailments/accidents causing disturbances to LWR/CWR • Breaches

  3. Rectification of rail fracture/weld failure Emergency repairs – By Keyman / gangman • Provide 1m long fishplate/joggled fishplate and restore the traffic with stop dead & 10 kmph for first train and 20 kmph for subsequent trains • If gap at fracture is less than 30 mm then insertion of closer is not necessary.

  4. Rectification of rail fracture/weld failure (contd.) Temporary repairs – By PWS • Traffic block – as soon as possible when the rail temperature is within the range specified for destressing. • Create a gap equal to rail closer available (not less than 4 m )+ gap at fracture + gap required for two welds. • Insert rail closer and restore the traffic at restricted speed.

  5. Rectification of rail fracture/weld failure (contd.) Permanent repairs – By JE (P.Way) • Welding of one joint of closer rail without rail tensor. • To ensure correct gap during welding of other joint, use the tensor and weld the joint. • After welding equalise the stresses by unfastening the either side for a length of 125 m and tapping by wooden mallet.

  6. Damage to Switch Expansion Joint • Complete SEJ to be replaced and gap adjusted as per specified in para 5.6.1 of LWR manual. • If another SEJ is not available than replace damaged and undamaged SEJ by a closer rail, clamp the joint and allow traffic at restricted speed. • After replacing closer rail by new SEJ and welding in-situ speed will be relaxed.

  7. Buckling of track • When buckling or tendency towards buckling may occur ? • Failure to adhere to the temperature ranges specified for operation on LWR/CWR • Deficiency of ballast section or/and inadequate ballast resistance • Ineffective fastenings or missing fastenings • Excessive settlement of formation • Improper functioning of SEJ

  8. Buckling of track • Tendency towards buckling can be identified through kinks in track. • Kinks may also be arise from incorrect slewing or lifting operation • By tapping sleepers for hollowness, tendency towards vertical buckling can be confirmed • Suspend the traffic and protect the track • Each case of buckling to be investigated by ADEN soon after its occurrence and report submitted to DEN/Sr. DEN

  9. Track Buckling

  10. Repairs to buckled track • Minimum supervision of JE/P.way • Emergency repairs • permanent repairs • Destressing • The buckled rails shall preferably be gas cut adequately apart 6.5 m • Slew the track to correct alignment • Insert the rail closer and pass the first train with dead stop & 10 kmph then 20 kmph for subsequent trains. • Permanent repairs:- Same as for repairs to rail fracture

  11. Breaches and Diversions • Affected portion shall be isolated by insertion of SEJ (within the range of td) • Isolated track to be replaced by fish plated track and box anchored if necessary • New formation shall be fully consolidated before laying of LWR again • Destressing in affected portion after laying of LWR

  12. Thanks

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