Dedicated Freight Corridor Corporation of India Limited (DFCCIL) has invited open e-tenders, in Single Stage Two Packet System for Comprehensive study on suitability of 60 Kg, 90 UTS rails on EDFC and 60 El 1080 Head Hardened Rails on WDFC for 25 T Axle load operation at 100 kmph on DFCCIL routes.
- Tender Reference Number: HQ-ENWC0MMS(MISC)/l/2022-O/o GGMAVC-I/DFCC/ Pt-1/16215R
- Name of Work: Comprehensive study on suitability of 60 Kg, 90 UTS rails on EDFC and 60 El 1080 HH rails on WDFC for 25 T Axle load operation at 100 kmph on DFCCIL routes.
- Estimated Cost of Work: INR 5,72,06,720 Crore
- EMD: INR 4,36,100 Lakh
- Completion Period: 09 Months
- Document Download / Sale Start Date: 13th January, 2023
- Document Download / Sale End Date: 21st February, 2023
- Pre-Bid Conference Date: 23rd January, 2023
- Bid Submission Start Date: 07th February, 2023
- Bid Submission End Date: 21st February, 2023
- Tender Opening Date: 21st February, 2023
Scope of Work:
- The scope of this contract is to conduct detailed studies (theoretical & field experimental/trials) to ascertain suitability of 60 Kg, 90 UTS Rails on EDFC and 60 El 1080 HH rails on WDFC for 25 T Axle load operation at 100 kmph on DFCCIL routes. The aspects to be covered in the study are given here under:
- Conducting theoretical studies required for finalizing criteria to be followed for selection of rail for operation of 25 T Axle load at 100 kmph on DFCCIL routes, which should include the following considerations:
- Theoretical rail stress calculations based on yield/allowable stress criteria, for Estimation of bending stress in rail due to wheel loading at critical locations of rail cross section, using Indian Railway method and comparable calculations based on international practices of any one advance Railway System,
- Estimation of total stress in the rail, which includes bending stress due to wheel loading duly accounting affect due to Gradient in the track, due to Braking forces on rising and falling’ gradient, thermal stress, residual stress, stress in rail for unforeseen factors & any other stress especially due to curvature etc. using Indian Railway method (RDSO) and comparable calculations based on international practices of any one advance Railway System,
- Estimation of various parameters required in rail stress calculations e.g. value of track modulus. Dynamic augment etc. for various speeds for freight stock for DFC conditions based on international practices of any one advance Railway System.
- Fatigue analysis of rail due to bending loads in absence of any defects based on international practices of any one advance railway system.
- Contact stress considerations (allowable shear stress. Yield and shake down limit) using Indian Railway method wherever available and based on international practices of any one advance Railway System.
- Wear and hardness requirement of Rail for 25 T Axle load operation at 100 kmph, as prescribed by at least two advance Railway Systems.
- Effect of small wheel diameter on strength requirement of rail (1000 mm wheel diameter vis-a-vis 840 mm new wheel diameter).
- Minimum technical requirements for 60 kg rail section, in terms of steel grade (UTS), proof stress, maximum value of permitted residual stress etc for 25 T Axle load operation at 100 Kmph on DFCCIL routes,
- To ascertain suitability of existing 60 Kg – 90 UTS rail used in EDFC track and 60 El 1080 HH rail used in WDFC for 25 T axle load operation at 100 Kmph on DFCCIL routes.
- The report on the above studies should cover detailed analysis and design calculations duly examined and certified by the technical expert having similar experience of conducting studies on advanced railway systems and who has published Technical Books/Reports/papers on international journals on the subject of rail stresses or rail related issues.
- Carrying out field instrumentation, conducting test & trials on DFCCIL track to estimate by field measurements, the following parameters:
- Measurement of following track parameters required in rail stress calculations. Each reading of measurements shall be done by 2 separate sets of sensors/strain gauges installed at close proximity for reliability of observations. For measurement of track modulus and Dynamic augment, DFCCIL will provide required test wagon for multiple runs with varying weight and permission to instrument the wagon if required:
- Value of track modulus (initial & elastic track modulus) for 3 track foundation conditions namely:
- Track having good formation with 300/350 mm clean ballast cushion.
- Track having bad formation with 300/350mm clean ballast cushion.
- Track laid on rocky strata/ PSC girder Bridges with 250/350 mm ballast
- cushion.
- Value of Dynamic augment on DFCCIL routes, for following conditions:
- No. of rolling stock: Five Rolling Stock, type to be decided by DFCCIL.
- Speeds: At two different speeds (75 Kmph and 100 Kmph or the maximum speed at which Rolling stock is fit).
- For measurement of dynamic augment, the compiled result for each stock should be based on measurements taken for at least 7 days (to have minimum 30000 data (readings/no of observations) per speed per rolling stock with known static wheel load on straight and curve track) in case of trials based on rail instrumentation or based on sufficient large data (minimum 150 Km length data) to carry out statistical analysis in case instrumented wheel or any other internationally accepted method is adopted.
- Field measurement of actual rail stress on critical points of rail section (rail foot center, rail foot corner (GF & NG), Rail head (GF [if feasible], NG) under no train load condition i.e. mainly due to residual & thermal stress in rail, to be measured @ two different rail temperatures (i.e. 50% in Coldest and 50% in Hottest season of year), at three locations’., two in central portion of CWR/LWR and one in breathing length for each rail temperature condition of both rails in straight and 2.0 – 3.0 Degree curve track location for all 3 types of track formation conditions (as mentioned in clause 2.1a)
- Field measurement of actual rail stress on critical points of rail section (rail foot center, rail foot corner (GF & NG), rail head [GF (if feasible) & NG] for five rolling stocks (type to be decided by DFCCIL) and for each rolling stock 2 different speeds (75kmph and 100 kmph or the maximum speed at which rolling stock is fit) of both rails in straight and 2.0 and 3.0 degree curve track location for all 3 types of track formation conditions (as mentioned in clause 2.1a).
- Measurements of Stress free temperature of LWR track by adopting non-destructive technique, be measured at two different rail temperatures (i.e. 50% in Coldest and 50% in Hottest season of year), at three locations i.e. two in central portion of LWR & one in breathing length of both rails in straight and sharpest curve track of all three type of track formation conditions.
Eligibility:
Technical Eligibility Criteria:
- The technical eligibility for the work as per clause 1.3.17 above, shall be satisfied by either the ‘JV in its own name & style’ or by any member of JV having equity share of 26% or above in JV’.
- Value of a completed work done by a Member in an earlier JV shall be reckoned only to the extent of the concerned member’s share in that JV for the purpose of satisfying his/her compliance to the above mentioned technical eligibility criteria in the tender under consideration.
Financial Eligibility Criteria:
- The JV shall satisfy the requirement of “Financial Eligibility” mentioned at clause 1.3.17 above. The “financial capacity” of the lead member of a JV shall not be less than 51% of the Threshold financial eligibility criteria mentioned at para 1.3.17 above.
- The arithmetic sum of individual “financial capacity” of all the members shall be taken as JV’s “Threshold financial capacity” to satisfy this requirement.
- Contractual payment received by a Member in an earlier JV shall be reckoned only to the extent of the concerned member’s share in that JV for the purpose of satisfying compliance of the above mentioned financial eligibility criteria in the tender under consideration.
The Tender document can be downloaded from IREPS website www.ireps.gov.in and DFCCIL’s website www.dfccil.com
Source: DFCCIL- Tender | Image Credit (representational): DFCCIL
