A Technical Guide on Derailments PDF

CAMTECH/M/3 99 APPENDIX „A‟ PROFORMA TO BE FILLED UP IN CASE OF DERAILMENT DETAILS OF THE ACCIDENT 1. The relevant paras in this proforma are required to b...

CAMTECH/M/3 99 APPENDIX „A‟ PROFORMA TO BE FILLED UP IN CASE OF DERAILMENT DETAILS OF THE ACCIDENT 1. The relevant paras in this proforma are required to be filled in by the inspectors/officers of the respective department before leaving the site of the accident and the complete proforma should be countersigned by the senior most officer present at the site of accident. 2. This proforma should form a part of the proceedings of the enquiry and should be sent along with the proceedings. THE SKETCH OF THE SITE OF ACCIDENT The engineering representative should prepare dimensioned sketches adequate for the preparation of a scale plan covering the entire site of accident. In preparing the sketch, due regard should be paid to the following instructions : 1) The sketch giving train no., date and kilometre of site of accident should be properly labelled. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 100 2) The north point should be indicated. 3) It should indicate prominently the direction of the movement and also the names of the stations in rear and advance of the accident site. 4) It should cover a length of about 300 meters behind the point of mount and almost and equal distance in front. 5) Each track of the Permanent way must be denoted by a pair of lines. 6) The position of level crossing, Telegraph post, bridges, tunnels, Gradient posts with Gradient Symbols, curves , demarking the beginning and end giving details of degree of curvature prescribed, super elevation and length of transition should be indicated. It should also indicate: a) The position of all derailed vehicles and the marks left by them either on sleepers, rails or ballast. b) Point of Mounting with position of rail joints on either side. c) Point of Drop. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 101 d) The pair of wheels of the first derailing vehicle. e) The position in which every displaced rail/ wagon or part of rail/ wagon and detachable components were found. f) In all the cases dimensions from nearest kilometres post and centre line of track should be given. 7. In case of accident within station limits sufficient details about the station layout should be showed in order to fully explain the movement of the effected train in relation to the topography. 8. The distance of site of accident from permanent structure to fix the site of accident precisely should be indicated. 9. The distance should be indicated to show the extent of the disturbance cause in P. Way or train composition on account of the accident. 10. Any marks of sleeper or other track fittings should be clearly indicated in their exact position in relation to the track or vehicles. 11. Broken parts of other extraneous material, if found on the site of accident, should be shown in the sketch, with details giving their precise position in relation to track. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 102 12. If necessary, more than one sketch should be enclosed one clarifying the yard layout and the system of working it and the other giving details, such as, position of wheels marks etc. In the form, one line should be used to represent both rails of track and such portion of the station yard (in case of accidents within station limits) should be covered as may be necessary. All necessary details relevant to the issue must be embodied in the sketch. The terminal station on the down side should be mentioned on the right extremity of the sketch, the terminal station on the upside being mentioned on the left extremity. If the accidents takes place within station limits the shorter sketch should be based on the station working diagram. 13. Details of track structure should be shown in the sketch. 14. Details of damage to bridges involved, spanwise should be shown. 15. In the case of accidents to and near level crossings, full details of the level crossings should be furnished. 16. Any other details as may be considered necessary to reconstruct the scene of the accident would also be shown. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 103 PERMANENT WAY SOIL SR. Type - e.g. Sandy, loam clay, Condition-firm wet No. moorum, black cotton, etc. slushy, etc. 1. 2. 3. BALLAST Type Depth below sleeper Width of shoulder in cm stone bottom in cm. stating from outside of moorum whether cleaned or ------------------------------------------------ sand etc. choked Rail Sleeper L R L R 4 5 6. 7. 8. 9. SLEEPER Type - Condition- Wooden new/second- CST9 hand/damaged Density Square or not Steel trough /unserviceable etc. etc. 10. 11 12. 13. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 104 RAILS Weight Conditio Rail fastening like dog spikes keys, n of tie bars, cotters, loose jaws, etc. wear ------------------------------------------ No. per sleeper condition tight or seat loose 14. 15. 16. 17. Rail Joints Condition- General remarks Description of Hogged, about cracks or anti-sabotage battered, low fractures of fish measures like etc. plates fish bolts and reversed jaws other components welded rails, etc. 18. 19. 20. Location of point of mount Location of point of derailment Whether on Whether on Whether Whether on a straight, a falling on falling grade, curves or grade, level straight, level or rising transition or rising curves or grade and on grade and on transition sag sag 21. 22. 23. 24. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 105 Note : 1. Left and right are with respect of direction of train movement. 2. The data in column 2 to 19 need not be collected when the defect is obviously and indisputably on account of major obstruction on track. 3. Only broken track material which is not indisputably established to be broken after the accident should be included in column 19 and should be preserved. 4. Column 20 need be filled in only when there is suspicion about sabotage being the cause of derailment. 5. Sag extents 90 meters on either side of theoretical junction of the grade lines (column 21 to 22). 6. Entry in column 16 and 17 must invariably be filled for wooden sleeper in case of derailment on curves indicating further whether bearing plates were provided. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 106 Track Measurements Station Distance apart Gauge Cross Level in mm ---------------------------------------------------------------------------- No. in metres. in mm Under no under load load condition condition 1. 2. 3. 4. 5. Track Measurements Marks Grinding Versines Remarks regarding length on or of transition degree of sleepers rubbing curve and specified super- or rail marks elevation, general top on rails alignment, etc. 6. 7. 8. 9. Note: 1. Point of mount should be marked as station no. ‘0’. The stations ahead of site of derailment be marked serially as ‘+n’ and in rear as ‘-n’ for measurement. 2. The cross level will be measured on the left rail only as determined from the direction of movement. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 107 3. Normally measurements will be take at stations three metres apart for a distance of 45 metres on either side of 0 station. They may be taken for column 3,4 & 5 may in addition be a taken individual sleepers for a length of 9 metres in the rear of 0 station. They may be taken for a distance of 90 metres in rear where the cause of derailment is not obvious. 4. This proforma need not be filled when the cause of derailment is obviously established as due to major obstruction on track, broken axle and or spring having fallen off prior to point of derailment. 5. The measurement of versines should preferably done on 62 feet chord for curves up to 10 degree sharpness and on chords of 31 feet on curves 10degree and sharper. The versines should be recorded in both cases at 15.5 feet intervals. The value of versine should be recorded against the nearest adjacent cross level recording station. 6. Additional data regarding vertical track profile of one of the rails should be taken if the point of derailment /mount is within 200 meters of the theoretical change of grade point and the change of grades is 0.5% or more. These levels should be taken 20 meters apart and should extend for at least 200 meters in rear of the point of derailment. They may be taken as early as possible after the site of accident has been cleared. A TECHNICAL GUIDE ON DERAILMENTS April ‘98  CAMTECH/M/3 108 Carriage & Wagon SR. Vehicle Type Tares Carrying Building Return PRR/O No No. capacity Date Date Particulars ------------- in. in ------------ Traffic Mech. tonnes tonnes Date Stn. 1. 2. 3 4 5 6 7 8 9 10 Pay load in Comm Station Rigid Whether Position Wheel & Axle tonnes odity wheel Braked from Thickn Wheel From From loaded ______ base or pipe engine ess of Gauge dia. actual from to in mm flange labels Weigh. in mm in mm 11 12 13 14 15 16 17 18 19 20 21 Wheel & Axle Axle Box (For IRS stock only) Any Observation Any Brass Condi condi condi clearance indica after mark of thick -tion -tion -tion of between -tion measuring obstructi -ness of of journal brass and of the profile on on in box sole collar of bent with tyre tyre mm and plate journal in axle defect gauge brass mm 22 23 24 25 26 27 28 29 A TECHNICAL GUIDE ON DERAILMENTS April ‘98  CAMTECH/M/3 109 AXLE GUARD (For IRS Stock only) Spring and spring gear clearance whether Are the Remark Free Camber Thickness between of spring of packing axle axle guard regar camber under plate axle guard bent or -ding of load in under box can otherwise bridle spring mm after spring seat groove work damaged bar in rerailing in mm on a level and clear of to prevent mm uncanted axle axle free track guard box movement in mm groove of axle box 30 31 32 33 34 35 36 Spring and spring gear Bogie Remarks Clea- Remarks Whether Buffer Type Rigid Vertical on rance on Any Height (To wheel Clear- condition between condition Spring be taken base in ance at of spring shackle of Eye after mm side plates plate shackle Touches uncoupling bearers and and pin plates Sole Bar & rerailing in mm buckles and pins in mm 37 38 39 40 41 42 43 44 A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 110 Bogie Remarks Bolster Details of Whether Any other regarding free spring broken parts load is defect in movement of camber giving placed on vehicles which bolster and under locations more than may have pivot and their load in w.r.t. point one contributed to condition mm of mount and wagon or caused the derailment derailment. 45 46 47 48 49 Note: 1. Details regarding all derailed vehicle should be given except : i. Where vehicle have derailed due to locomotive derailment. ii. The first derailed vehicle is obvious from examination of marks on tyres, where details for first derailed vehicle need only be given. iii. When obvious and indisputable cause is sabotage or an obstruction on track. 2. Front and rear and left (L) and right (R) are with respect to the direction of the movement. A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 111 3. For an obvious cause of derailment such as a broken axle, spring dropping on run, or some part of under gear hanging loose and causing obstruction. Only relevant particulars need be filled. 4. For an obvious cause of derailment such as a broken axle, spring dropping on the run, and/or some part of under gear hanging loose and causing obstruction, only relevant particulars need be filled. 5. The spring characteristics should also be got checked with a load deflection testing machine in addition to filling information under items, (46), (47), (48) and (49) of the proforma. TOOLS WHICH MUST BE AVAILABLE IN ACCIDENT RELIEF TRAIN FOR TAKING ABOVE MEASUREMENTS For Track measurements : 1) Gauge-cum-Level 2) Stepped-Feeler-gauge set 3) Fish chord or nylon wire 10 meter 4) Steel scale 30 cm. 5) Straight edge 1.5 meter 6) Measuring tape - 20 Meter length A TECHNICAL GUIDE ON DERAILMENTS April ‘98 CAMTECH/M/3 112 For Rolling Stock measurements : 1) Tyre Defect Gauge 2) Outside Calliper - 6” 3) Inside Calliper - 6” 4) Feeler Gauge set 5) Wheel Gauge set sliding type (spring loaded) with spirit level 6) Measuring tape 20 meter 7) MICO gauge 8) Template 9) Nylon wire - 20 meter Other essential items : 1) Good quality photographic camera A TECHNICAL GUIDE ON DERAILMENTS April ‘98