Rail Vikas Nigam Limited (RVNL) has invited bids under single stage single packet system for the work of ‘Execution of work of Roadbed, Minor Bridges, Major Bridges, Supply of Ballast and Track Linking (Excluding Supply of Rails and Sleepers, Thick Web Switches and Special Sleepers) between Chainage Km 79.6-93 of Taroki-Rowghat Section and Track Linking in Rowghat Yard in Connection with Dallirajhara-Rowghat New Rail Line Project on Raipur Division of South East Central Railway in Chhattisgarh State, India.
- Tender Reference Number: RVNL/RAIPUR/TAROKI- ROWGHAT/2021/2
- Approx. Estimated Cost of Project: INR 179.21 Crores
- Period of Completion: 30 Months + 6 Months DLP
- Document Download / Sale Start Date: 19-Aug-2021
- Document Download / Sale End Date: 30-Sep-2021
- Bid Submission Start Date: 19-Aug-2021
- Bid Submission End Date: 30-Sep-2021
- Bid Opening Date: 30-Sep-2021
- Pre Bid Meeting Date: 03-Sep-2021
About the Project:
- This Work Pertains To Construction Of Roadbed, Minor Bridges, Major Bridges, Supply Of Ballast And Track Linking (Excluding Supply Of Rails And Sleepers, Thick Web Switches And Special Sleepers) Between Chainage Km 79.6-93 Of Taroki-Rowghat Section And Track Linking In Rowghat Yard In Connection With Dallirajhara-Rowghat New Rail Line Project On Raipur Division Of South East Central Railway In Chhattisgarh State, India.
- The construction of new B.G. line, connecting Dallirajhara-Rowghat, will sustain iron ore supply to Bhilai Steel Plant. This is a project of National Importance and therefore its progress is being monitored by the PMO office also.
- The total length of the new line to be constructed by RVNL is 95 KM. The proposed alignment starts from Dallirajhara in Balod District and run through six (6) intermediate stations up to Rowghat in Kanker district of Chhattisgarh. The alignment of the proposed new line runs parallel to the state highway no.5 from Dallirajhara to Taroki station and then takes a detour and run either side of the hill. It again comes close to the road near Rowghat.
- Alignment map is enclosed (as Annexure IV) for reference and general idea of the alignment. The proposed station are Dondi (17.00 Km), Bhanupratappur (33.30 Km), Keoti (41.85 Km), Antagarh (58.95 Km), Taroki (76.69 km) and Rowghat (94.40 Km) from Dallirajhara.
Track Laying & Linking:
- Track linking work shall be done using mechanized method using all the required contractor’s manpower and equipments. Manual linking of track if permitted by the Employer where mechanical linking is not feasible due to constraints in working and procedure approved by the Engineer, only 90% of the accepted rates of BOQ item 5007 Bill no. 5A shall be payable.
- 60 Kg/90UTS rails on PSC sleepers with density of 1660 sleepers per km with 350 mm ballast cushion shall be provided for the main line. In station yards, for the loop lines, 60 Kg rails on PSC sleepers with density of 1660 sleepers/Km with 250 mm ballast cushion have been proposed. The main line is proposed to be provided with LWR / CWR & loop lines shall be provided with LWR/SWR as per provision of Indian Railway Permanent Way Manual.
- Yards will be tracked. Glued joints shall be provided wherever required. 60 Kg points and crossings on PSC fan shaped lay outs have been proposed.
- Hard Stone ballast of 65 mm size as per specification shall be provided for 350 mm ballast cushion for the main line and 250 mm ballast cushion for loop line and siding.
- The work also involves slewing / regrading of existing tracks and relaying / dismantling of P-way and Points & crossings, wherever necessary.
- Rails (single rails) shall be transported by road and stacked at suitable locations near the location of track linking. After the formation is ready and cleared by the Engineer for track linking these rails are to moved to cess of final place of link by suitable means using hydra, portal or any other suitable means/devices by agency without disturbing the finished formation.
- Flash butt welding shall be done to convert the single rails into LWR/CWR as per plan approved by RVNL by contractor’s portable road trailer mounted flash butt welding machine. If there is delay in formation being ready, single rails can be converted into 3/4 Rail Panels in depots and then these 3/4Rail Panels can be converted into LWR/CWR after transferring them to formation.
- PSC sleepers shall be transported by road and stacked near proposed track.
- The required quantity of ballast to the maximum extent (not less than 2 Cum per meter length) shall be brought by contractor’s dumpers on the formation and spread on the proposed alignment by contractor’s grader. The grader should spread and level the ballast in a width of 3.2 meter (Bottom) and cushion of 200 mm. The remaining quantity of ballast shall remain on the common cess of proposed track, leaving clear space for linking of auxiliary track.
- Now the sleepers shall be lifted from the stacks near the proposed track with the help of hydra and kept on the formation between auxiliary track for being picked up by portals for leading them to the point of laying in case portals are proposed to be used for transport and laying of Sleepers.
- Contractor shall bring his own mechanized portal equipment which will be capable of traveling on the auxiliary track and will transport the sleepers from stack to the location of linking. At the location of laying, the sleepers shall be laid at the required spacing ensuring that the centre line of sleepers matches with the centre line of proposed track. Instead of portals, sleeper laying equipment which does not require use of auxiliary track, can also be used for laying of sleepers.
- After the sleepers are laid on the ballast bed of 200 mm thickness, contractor shall arrange his own Rail Threader to pick up the auxiliary track rails from both sides and lay on the PSC sleeper at Rail Seat to complete the laying of track.
- The ballast lying along the track shall be put in the track in the cribs and shoulders for taking up the work of lifting of track to provide required cushion of 350 mm.
- Track shall be lifted and aligned by small track machines. The lifting and aligning machine should be light in weight and should be transportable by road from one site to another. This lifting, aligning and tamping may be required in 2-3 phases until the desired clear cushion and proper alignment is achieved.
- Behind the lifting aligning machine, contractor’s small track machine capable of tamping to be deployed. The Tamping machine should have 8 Nos. of tamping tools so that one sleeper can be tamped completely per insertion. This light duty tamper should be self propelled and should be transportable by road from one place to another.
- The contractor shall unload additional ballast over the track by his own mechanized means or manually as per site conditions and directions of Engineer to achieve desired ballast profile.
- For achieving the desired cushion and to fill the inter-space of sleepers as well as crib ballast as per final profile, whatever ballast will be required in phases to be unloaded by the contractor with his own equipment and machinery.
- The contractor, after sequence of linking, lifting, aligning and packing with his own tools, plants and equipments shall bring the track parameters in floating condition within the tolerance limits as specified in IRPWM
- The track thus laid shall have speed potential of 45 kmph. After this Railway’s heavy ontrack tampers shall be made available for machine packing to achieve normal sectional speed.
- Two packings shall be done by the contractor with Railway’s heavy ontrack tampers. After the first tamping the track shall be made suitable for speed potential of 75 kmph. The second
- tamping (final tamping) shall be done in design mode and the track shall be made suitable for maximum permissible sectional speed.
- Profiling of ballast shall be done to achieve the ballast section as prescribed in IRPWM.
- The project area is Left Wing Extremist affected, where limited working hours under dedicated security cover at work site is available. Availability of local labour is sometime limited, so executing agency is advised to arrange for maximum mechanizations for timely completion of work.
Bidding Documents can be downloaded free of cost from RVNL website www.rvnl.org and RVNL e-Tendering portal i.e https://rvnl.euniwizarde.com/.
Source: RVNL-Tender | Image Credit (representational): IRCEP
