1 / 22

EFFECT OF HIGHER AXLE LOADS

EFFECT OF HIGHER AXLE LOADS. A STUDY ON ALLAHABAD DIVISION OF NCR BY A. B. KHARE DY CE TP NCR SUMEET SINGHAL SR DEN III/ALD. NCR’s SCENERIO. AXLE LOAD WAS PERMITTED ON NCR IN APR 2005 MAINTENANCE EFFORT- DIFFICULT TO QUANTIFY GENERAL FEAR OF INCREASING RF/WF

mari-cross
Download Presentation

EFFECT OF HIGHER AXLE LOADS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EFFECT OF HIGHER AXLE LOADS A STUDY ON ALLAHABAD DIVISION OF NCR BY A. B. KHARE DY CE TP NCR SUMEET SINGHAL SR DEN III/ALD

  2. NCR’s SCENERIO • AXLE LOAD WAS PERMITTED ON NCR IN APR 2005 • MAINTENANCE EFFORT- DIFFICULT TO QUANTIFY • GENERAL FEAR OF INCREASING RF/WF • RF/WF DATA OF ALLAHABAD DIVISION ANALYSED

  3. EFFECT ON RF/WFs • RAIL REPLACEMENTS • GMT CARRIED BY RAILS • FATIGUE IN RAILS • EFFECT OF BALLAST CUSHION/DS • TEMPERATURE VARIATIONS IN THE YEAR • DE-STRESSING TEMPERATURE • AGE OF DE-STRESSING

  4. RAIL LENGTH IN TRACK KM.

  5. NO. OF RAIL FRACTURES

  6. SALIENT FEATURES (MGS-ALD) • 60 KG RAILS- 66% 52 KG RAILS- 34% • 80% OF THESE COMPLETED MORE THAN HALF OF LIFE • IN 60 KG • FR/KM INCREASED FOR 500, 600 & 700 GMT BANDS • NO DEFINITE TREND FOR < 500 GMT • IN 52 KG • FR/KM INCREASED FOR 700 GMT • DECREASED TREND FOR 300-500 GMT

  7. SALIENT FEATURES (ALD-CNB) • 60 KG RAILS- 64% 52 KG RAILS- 36% • 65% OF 60 KG RAILS & 35 % OF 52 KG RAILS HAVE COMPLETED MORE THAN HALF STIPULATED LIFE • IN 60 KG • NO DEFINITE TREND EXCEPT FOR 800 GMT • IN 52 KG • NO INCREASED TREND FOR 500-800 GMT EXCEPT FOR 800 GMT

  8. SALIENT FEATURES (CNB-TDL) • 60 KG RAILS- 54% 52 KG RAILS- 46% • 67% OF 60 KG & 75% OF 52 KG RAILS HAVE COMPLETED MORE THAN HALF STIPULATED LIFE • IN 60 KG • INCREASING TREND FOR >600 GMT • NO DEFINITE TREND FOR < 600 GMT • IN 52 KG • FR/KM INCREASED FOR 600 GMT • DECREASED TREND FOR 300-500 GMT

  9. SALIENT FEATURES (TDL-GZB) • 60 KG RAILS- 78% 52 KG RAILS- 22% • NEWER RAILS –ONLY 20% HAVE COMPLETED MORE THAN HALF OF LIFE • IN 60 KG • NO DATA FOR 400 GMT & ABOVE BANDS • NO DEFINITE TREND • IN 52 KG • NO DATA FOR 600 GMT & ABOVE BANDS • INCREASED TREND FOR 400-500 GMT BANDS

  10. EFFECT OF DEEP SCREENING(ALD-CNB SECTION) • FRESHLY SCREENED TRACK • NO DECREASE • DUE TO INITIAL CONSOLIDATIONS • CREATION OF SECONDARY VOIDS • RESILIENT TRACK • NO INCREASE IN FR/KM • NON RESILIENT TRACK • INCREASED FR/KM

  11. CONCLUSION • GENERAL FEELING OF INCREASE IN RF/WF • INCREASE IN ABSOLUTE NOs • NO INCREASE DUE TO AXLE LOADS • BUT DUE TO • GMT CARRIED • AGE OF RAIL • NON-RESILIENCY IN TRACK

  12. LIMITATIONS • DATA OF VERY SHORT PERIOD • EACH FACTOR ANALYSED SEPARATELY • COMBINED EFFECT COULD BE DIFFERENT • DIFFICULT TO RELATE RF/WFs WITH OTHER MAINTENANCE FACTORS • NEEDS TESTING WITH LONGER TIME SPAN

  13. THANKS

More Related