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RESTORATION OF BRIGDE NO.108 AFTER ACCIDENT

By KINKAR DAS ,ADEN/III/LMG/NFR K.KULANDAI MARI ,AXEN/GC/POY/SR P.R.PANIGRAHI ,ADEN/TMC/WAT/ECOR GUIDED BY SHRI V.B.SOOD( IRSE), Professor Bridge, IRICEN/PUNE. RESTORATION OF BRIGDE NO.108 AFTER ACCIDENT. INTEGRATED COURSE NO. 10109. Bridge Description.

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RESTORATION OF BRIGDE NO.108 AFTER ACCIDENT

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  1. ByKINKAR DAS ,ADEN/III/LMG/NFRK.KULANDAI MARI ,AXEN/GC/POY/SRP.R.PANIGRAHI ,ADEN/TMC/WAT/ECORGUIDED BY SHRI V.B.SOOD( IRSE), Professor Bridge, IRICEN/PUNE. RESTORATION OF BRIGDE NO.108 AFTER ACCIDENT INTEGRATED COURSE NO. 10109

  2. Bridge Description BR NO 108 In between stations MPP & DKE of Lumding-Badarpur (MG) Hill Section Of N.F.Railway Situated At KM 52/4-5 On a 6.5° curve On River Boila Nallah Between the valley of several hills No approach is available Terror stricken area Pier height 22m

  3. Span 1 x 18.3M plate girder + 3 x 30.5M under slung girder + 2 x 18.3M plate girder . Abutments, Pier P1 & P5 are of stone masonry and rest of the piers P2,P3 & P4 are made of trestles .

  4. Accident Details Train Formation Time of occurrence: On dt 25.06.2007 at 9.40hrs. MG Goods Train - Loaded wagons pulled by two locos Fell into the bridge Excess speed was the cause of accident. Damage: P4 trestle was uprooted and P3 trestle damaged. Under slung Girder of 30.5m (span no 4) and Plate Girder of 18.3m (span no 5) fallen down on river bed. Casualty: Two Loco Pilots found dead.

  5. Restoration ART with staff arrived from LMG at 12.20 hrs ARME arrived from LMG at 19.55 hrs. Clearance of site started. Setting up Camps and deployment of security personnel. Restoration with departmental resources & staffs was decided. Safety equipments were provided to staff.

  6. CLEARANCE OF SITE Deptt. labours employed 65 Persons. Dismantling of 30.5m under slung and 18.3 PG to clear the site for reconstruction of damaged trestles and its footings. Restoration was challenging because i) Br located on curve. ii) Pier height 22m. iii) Underslung girder of 30.5 span. iv) Monsoon season.

  7. FIRST STAGE PLANNING Temp tower T1 to support span no 3 at BPB end. Casting of uprooted foundation of P3. To erect new trestles at P3 & P4. To launch 18.3 PG of span no 5 from BPB end . Assembling 30.5m CH Span at BPB end on the same alignment of track.

  8. First Stage Planning LMG BPB t1 t2 A2 A1 P1 P2 P4 P5 P3

  9. FIRST STAGE PLANNING Contd. Launching of CH Span with the help of BFR and special type of skid providing, service spans between P3 & P4. Erection of temp tower T2 started in between P3 & P4. Assembling CH Span Started at BPB end.

  10. FIRST STAGE PLANNING Contd. • When the temporary staging T2 was nearing completion, the staging was washed out by devastating flood. • Loss of time and wastage of labour force. • Planning of launching the CH span from BPB end was reviewed and changed.

  11. 2nd STAGE PLANNING OF CH SPAN (Changed Scheme) Working scheme was reviewed. It was decided to assemble & launch 30.50m by cantilever method, CH Span from LMG end instead of BPB end. Shifted CH span materials to LMG end. Slewed the girders of span no 1&2 towards upstream side ,to have a straight alignment for assembling & launching of CH span.

  12. 2nd STAGE PLANNING OF CH SPAN (Changed Scheme)Contd. Then assembling of CH span started at LMG end. Casting of foundations of piers of P3 & P4,after providing dowel bars and holding down bars to stone masonry, were finished. By this time new materials for tresstles of P3 & P4 reached at site, then errection of the same started also.

  13. ACTIVITY OF 2nd STAGE SCHEME LAUNCHING OF PG IN SPAN NO 5. Service girders were erected in span no 5. After arrival of new Plate girders, this was brought from BPB end on dip lorries on track gauge of 2.1m. Lowered the girders in position in span no 5 with erected gantries and 10t winches.

  14. ACTIVITY OF 2nd STAGE SCHEME Contd. CH SPAN It was assembled at LMG end on a straight track of 60m length on 1.075m gauge including launching nose The girder of span no 5 was made 12m straight for receiving the launching nose in straight track Launching nose portion was kept 75mm down to take care of deflection.

  15. Second Stage Planning LMG BPB t1 A2 A1 P1 P2 P4 P5 P3

  16. ACTIVITY OF 2nd STAGE SCHEME Contd. • CH span was pulled to position . • At one end it was pulled by one winch and at other end it was restrained by another winch. • For sliding PTFE was used. • First the CH Span was pulled in cantilever position then got simply supported on pier P4.

  17. Launching Scheme: cantilever Method

  18. PTFE show for sliding

  19. CH span being pulled

  20. CH span being pulled

  21. Launching Nose simply supported

  22. ACTIVITY OF 2nd STAGE SCHEME Contd. Launching nose was disconnected, after hanging the CH span with 26m high derricks. CH span was lowered with a gantry & 2 pullies at each end by synchronized winches at each ends. The two trusses of CH span was spread by side slewing by horizontal jacks. Cross beams, stringers & bracings etc were connected. Rocker at one end &slide bearing at another end were provided.

  23. Pulley arrangement for dismantling launching nose

  24. CH Span being widened

  25. ACTIVITY OF 2nd STAGE SCHEME Contd. • Track were linked after aligning the girders to their desired positions. • On completion of linking, the gauge, super elevation, bearing of girders, all others were checked thoroughly. • Light engines with two locos were allowed to roll over the track and then the track was certified fit by competent authority. • It took 105 days to complete the restoration .

  26. CONCLUSION Due to excess speed the derailment has occurred and lot of inconvenience faced by various corners of peoples from India and there was interruption of traffic for more than 3months. With best efforts of higher officials and with devotion of deptt. workers the restoration was completed.

  27. Load test after restoration Thanks !!

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