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Bridge Monitoring in South East Central Railway

Bridge Monitoring in South East Central Railway. Presented By P. Barapatre (Chief Bridge Engineer). South East Central Railway, Bilaspur (C.G.). SECTION NOTIFIED FOR RUNNING OF HIGHER AXLE LOAD. DUG – DRZ FOR 25 T AXLE LOAD FOR BOBS JHARSUGUDA- KIRODIMAL NAGAR FOR CC+8+2 FOR BOXN

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Bridge Monitoring in South East Central Railway

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  1. Bridge Monitoring in South East Central Railway Presented By P. Barapatre (Chief Bridge Engineer) South East Central Railway, Bilaspur (C.G.)

  2. SECTION NOTIFIED FOR RUNNING OF HIGHER AXLE LOAD DUG – DRZ FOR 25 T AXLE LOAD FOR BOBS JHARSUGUDA- KIRODIMAL NAGAR FOR CC+8+2 FOR BOXN KRBA-CPH-BSP-APR-NKG FOR CC+6+2 FOR BOXN AND BOBRN DKU-KNHN-KPKD-KRDH FOR CC+6+2 FOR BOXN AND BOBRN

  3. ACTION TAKEN (A) DESIGN CHECKING CHECKING OF SUBSTRUCTURE CHECKING OF SUPER STRUCTURES FATIGUE STRESS FOR 2 MILLION CYCLE FATIGUE STRESS FOR 10 MILLION CYCLE VERIFICATION OF DESIGN CALCULATION BY RDSO CLEARANCE FOR RUNNING HIGHER AXLE LOAD

  4. (B) IDENTIFICATION OF BRIDGES BRIDGES ARE IDENTIFIED FOR INSTRUMENTATION BASED ON ITS STRENGTH TYPE OF SPAN TYPE OF GIRDER OTHER REASON LIKE NON AVAILABILITY OF DRAWINGS

  5. Bridges Proposed For Instrumentation 1. BRIDGE NO. 105 IN DUG–DRZ SECTION (5X100’+2X40’ STEEL GIRDER) 2. BRIDGE NO 154 UP IN JSG-KDTR SECTION (4X20’ ARCH + 1X100’ STEEL GIRDER) 3. BRIDGE NO.91 K IN CHULHA–APR SECTION (7X60’ STEEL GIRDER) 4. BRIDGE NO. 175 UP NEAR UMARIA (2X100’ STEEL GIRDER) 5. BRIDGE NO 34 UP IN KNHN-KP SECTION (7X150’ + 2X 60’ STEEL GIRDER)

  6. (C) TENDERING SPECIAL LIMITED TENDERS WERE INVITED WITH GM’S APPROVAL 1. FOR BRIDGE NO. 105 IN DUG-DRZ SECTION A) OPENED ON 24/3/06 B) AWARDED ON 13/04/06 (TO SHARMA ASSOCIATES) C) TESTING DONE ON 26/05/06 and 17&18 Nov 06 2. FOR OTHER FOUR BRIDGES COMBINED TOGETHER A) OPENED ON 11/05/06 B) AWARDED ON 30/08/06 (TO SHARMA ASSOCIATES) C) NUMERICAL MODELING COMPLETED. D) TESTING ON TWO BRIDGES PLAN FROM 08 Nov, TO 15 Nov, 2006.

  7. SCOPE OF WORK SCHEDULE INCLUDES 1. TO DEVELOP NUMERICAL MODEL SOFTWARE BASED ON TYPE OF STRUCTURE TYPE OF LOADING TO KNOW THEORETICAL MAXIMUM STRESSES IN BENDING MAXIMUM STRESSES IN SHEAR MAXIMUM DEFLECTION 2. INSTRUMENTATION TO GET MAXIMUM BENDING STRAIN (AT CENTER OF GIRDER) BENDING STRAIN AT FIRST CUT OFF POINT MAXIMUM DEFLECTION (AT CENTER OF GIRDER) MAXIMUM SHEAR STRESS AT SUPPORT LONGITUDINAL STRAIN ON BEARING SETTLEMENT OF PIER TILT OF PIER cont…

  8. SCOPE OF WORKCONT.. • DATA COLLECTION , RECORDING ,STORAGE AND REPORT SUBMISSION (THIS WILL BE DONE QUARTERLY) • RESIDUAL LIFE ANALYSIS • DETERMINE REHABILITATION/STRENGTHENING SCHEME. (OPTIONAL) • CONT. MONITORING FOR TWO YEARS. (OPTIONAL)

  9. FIELD WORK INVOLVES • FIXING OF SENSORS. • CONNECTION TO DATA ACQUISITION SYSTEM. • RUNNING OF TEST TRAIN. • COLLECTION & STORAGE OF DATA. 5. REPORT SUBMISSION NOTE :- THE DATA WILL BE PROCESSED FOR PREPARATION OF TECHNICAL REPORT

  10. Super Structure STRAIN GAUGES USED FOR INSTRUMENTATION CONTINUE

  11. CONTINUE

  12. 2. FOR VERTICAL FORCE TEST TRAIN WERE RUN AT VARIOUS SPEED A) 5 KMPH (CONSIDERED AS STATIC LOADING) B) 15 KMPH C) 30 KMPH D) 45 KMPH E) 60 KMPH F) 75 KMPH 3. FOR LONGITUDINAL FORCE TEST IS CONDUCTED FOR A) BREAKING FORCE AND B) TRACTIVE EFFORT NOTE:- FOR VERTICAL FORCE, TEST TRAIN WAS COMPRISED OF SINGLE WDG3A LOCO WITH 10 BOBSNM1 WAGON LOADED WITH 100 TON (25 T AXLE LOAD) FOR LONGITUDINAL FORCE, TEST TRAIN WAS COUPLED 2WDG3A LOCO WITH 48 BOBSNM1 WAGON LOADED WITH 100 TON (25 T AXLE LOAD)

  13. Comparison of Theoretical Stress with numerical modeling and actual stress1.Bending stresses at mid span (In Kg /CM2 )

  14. Actual stresses (In Kg /CM2 )

  15. 2. Shear stresses. (In Kg /CM2 )

  16. 3. Deflection:-( In mm)

  17. 4. Longitudinal forces

  18. 5. Deflection of pier 6. Pier Tilt

  19. Thank You South East Central Railway, Bilaspur (C.G.) Exit

  20. Pier Back

  21. Super Structure Back

  22. Test Train With 2 WDM2 Back

  23. Data Logger

  24. COLLECTING DATA Back

  25. Deflection Gauge Back

  26. Shear Gauge Back

  27. Bottom Of Flange Back

  28. Tilt Of Pier

  29. Settlement Of Pier Back

  30. Deflection Of Girder Back

  31. Settlement Of Pier Back

  32. DEFLECTION AT CENTRE OF 40’ Back

  33. COLLECTING DATA

  34. COLLECTING DATA Back

  35. FIXING RAIL GAGES

  36. FIXING GAGES AT FLANGES Back

  37. FIXING GAGES AT FLANGES

  38. CABLING RAIL GAGE

  39. CABLING RAIL GAGE

  40. FIXING RAIL GAGES

  41. FIXING RAIL GAGES Back

  42. GAGE AT CUTOFF Back

  43. GAGE AT 100’ BOTTOM CENTRE Back

  44. GAGE ON RAIL Back

  45. DESIGN CHECKING DUG - DRZ SECTION DESIGN CRITERION: (i)Loco: Double headed WDM2. (ii)Wagons:BOBS wagons with CC+8+2t loading. (iii)Basic wind pressure =150 kg/m2 (iv)Speed of train=75 Kmph (v)Dispersion of longitudinal forces to approach is allowed. (vi)Permissible stresses have been adopted for 10 million cycles. RESULTS:SUB STRUCTURES: Substructures have been found safe . SUPER STRUCTURES: (i)40’ plate girder confirming to RDSO Drg. No. BA 1056 has been found safe. (ii)100’ plate girder confirming to RDSO Drg. No. BA 1518 has been found unsafe for above criterion. But it is safe for 50 Kmph speed in 2 million cycles.

  46. KORBA - NKJ, JHARSUGUDA - KIRORIMALNAGAR, DUMRIKHURD - KANHAN SECTIONS DESIGN CRITERION:- (i)Loco: Double headed WDM2/Double Headed WAG5/Single Headed WAG7. (ii)Wagons: 58 Nos. BOXN Wagons Loaded with CC+6+2t for Korba-NKJ& Dumrikhurd - Kanhan routes and with CC+8+2 for Jharsuguda - Kirorimalnagar (iii)Basic wind pressure = 150 Kg/m2, as stipulated in bridge rules for broad gauge bridges. (iv)Speed of the train = 60Kmph (Ref: CE/SECR/Bilaspur letter No. Engg/TC-1/ Increase in axle load/1767; dated 03-03-06.) (v)Dispersion of Longitudinal forces to approaches is allowed. (vi)Permissible stresses have been adopted for 10 million cycles.

  47. RESULTS: SUB STRUCTURES: Substructures have been found safe . SUPER STRUCTURES: (i)40’ plate girders confirming to RDSO Drg. No. BA 1056,BA11003 have been found safe. (ii)60’ plate girders confirming to RDSO Drg. No. BA 1057,BA11004 CE’s Drg. No. 10291, CE’s Drg. No. 11237 have been found safe. (iii)80’ plate girders confirming to RDSO Drg. No. BA 1058, (iv)100’ girders confirming to RDSO Drg. No. BA 1059(Plate Girder) ,BA 6081 (Under Slung Type) have been found safe for 100’ plate girder confirming to RDSO Drg. No. BA 1518 has been found unsafe for above criterion.But it is safe for 50 Kmph speed in 2 million cycles. (v)150’ open web girders confirming to RDSO Drg. No. BA 5025,BA11101 have been found safe. Cross Girders and Stringers for these girders have also been found safe. BACK

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