Larsen & Toubro today emerged as the lowest bidder for major tunneling work on the under construction 125 km Rishikesh-Karnaprayag railway line which will link both towns in Uttarakhand through 12 stations.
The 15.758 km Package 4 connects chainage 47.360 with 63.118 and will be constructed using at least two tunnel boring machines (TBM), with some NATM work involved. Besides a 15.1 km tunnel (number 8), it includes a 240m embankment for Devprayag Station, a 300m embankment at Janasu and one minor bridge.
Rail Vikas Nigam Ltd (RVNL) invited bids for this package in February 2020 with a 60 month (5 year) deadline, and opened technical bids on October 27 to reveal 4 bidders.
RVNL’s Estimate: Rs. 3853.48 crore
Financial Bid Values:
|Larsen & Toubro||Rs. 3337.60 crore|
|Gulermak||Rs. 3484.34 crore|
|Afcons Infrastructure||Rs. 3790.80 crore|
|Megha Engineering and Infrastructure (MEIL)||Rs. 4019.93 crore|
Contract: RVNL/RKSH-KNPG/Tender/Tunnels/ Pk-4
Brief Scope: Construction of tunnels , formation, construction shaft and other ancillary works from chain age 47 plus 360 to 63 plus 117 km with TBM and NATM under Package-4 in connection with new BG line between and Karanprayag in the state of Uttarakhand.
L&T’s bid of Rs. 3337.60 crore was well below RVNL’s estimate of Rs. 3853.48 crore, so they should be awarded Package 4’s tunneling contract in the coming weeks. Out of a total of 9 tunneling packages, if I’m not mistaken – this will be L&T’s second major win after Package 2 (chainage 33.097 to 18.601) which includes the project’s 6.46 km tunnel #2 and 6.72 km tunnel #3.
A consortium of TUMAS India Pvt. Ltd. – Altinok Musavirlik Muhenislik A.S (JV) is the detailed design consultant (DDC) for Package 4. Per their website:
Main tunnel is 15.757 km long and has 8.8 m inner diameters and 9.7 outer diameters. Escape tunnel is 15.757 km and has 5.0 m inner diameter and 5.7 m outer diameter. Both NATM and TBM drilling method options has been evaluated and TBM has been selected.The width of inlet portal of tunnel has been designed as 22.098 m, and the height of inlet portal has been designed as 13.00 m since the topographic conditions of alignment. The length of inlet portal is 183 m.
The Rishikesh – Karnprayag rail project is considered to be of national importance and is being tracked on the Central Government’s PRAGATI (Pro Active Governance and Timely Implementation) portal. When ready, it will help improve connectivity to the Char Dham shrines of Yamunotri, Gangotri, Badrinath and Kedarnath in the Garhwal region of the Himalayas.
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