DMRC completes Part IV metro tunneling work between Krishna Park Extension-Keshopur | Railways Information
Delhi Metro Rail Company (DMRC) achieved one other milestone because it accomplished tunneling work between Krishna Park Extension and Keshopur on the Janakpuri West – RK Ashram Marg hall. A Tunnel Boring Machine (TBM) broke by this morning at Krishna Park Extension after boring a 1.4-kilometer-long tunnel within the presence of the Secretary, Ministry of Housing and City Affairs and Chairman, DMRC Manoj Joshi, Managing Director, DMRC, Vikas Kumar and different senior officers. Officers said that this tunnel breakthrough was achieved utilizing a mammoth 73-meter-long TBM. The completion of this stretch is a major achievement for DMRC since this work confronted repeated constraints because of the pandemic.
Officers mentioned that this tunnel breakthrough was achieved utilizing a mammoth 73-meter-long TBM. Two parallel round tunnels for up and down motion have now been constructed on this stretch, which is a part of a 2.2-kilometer-long underground part from Janakpuri West to Keshopur. The work on the opposite parallel tunnel on this part was accomplished in December final yr.
The workforce was retained following all the rules, and the work schedule was deliberate accordingly. On this underground stretch, aside from the dual tunnels, the ramp and the entry/exit have been accomplished whereas about 70 % of the Krishna Park Extension station has additionally been accomplished. Civil work of this specific underground part will likely be accomplished by early subsequent yr although all the Janakpuri West – RK Ashram Marg hall will likely be prepared by September 2025.
DMRC at the moment achieved a significant development milestone in Part 4 with completion of tunneling work between Krishna Park Extension & Keshopur in presence of Sh. Manoj Joshi, Secretary, @MoHUA_India, GoI & Chairman/DMRC and Sh. Vikas Kumar, MD/DMRC with different senior officers. pic.twitter.com/JrrOR6saK6
— Delhi Metro Rail Company I कृपया मास्क पहनें (@OfficialDMRC) November 19, 2022
This new tunnel stretch is a continuation of the sooner Magenta line tunnel that was already constructed for the presently operational Botanical Backyard – Janakpuri West hall. The tunnel has been constructed roughly at a depth of 14 to 16 meters. About 2,000 rings have been put in within the tunnel. It has an inside diameter of 5.8 meters. The alignment of the tunnel runs alongside the Outer ring highway and beneath multi-storied built-up buildings.
The tunnelling work concerned innumerable challenges like shifting sewer strains at a depth of 8 meters utilizing the micro tunnelling methodology. As well as, on account of heavy site visitors on the Outer Ring Street, a subway was constructed utilizing the box-pushing methodology with out disturbing the site visitors circulate.
Officers mentioned that each one obligatory security precautions have been taken whereas establishing the tunnel beneath the built-up buildings by monitoring the bottom actions with extremely delicate devices mounted on the close by buildings. With these measures, it was ensured that there was no settlement anyplace.
As a part of the Part IV work accepted up to now, 28.76 kilometers of underground strains will likely be constructed. The Janakpuri West-RK Ashram Marg hall may have underground sections of 9.41 kilometers in whole.
A TBM is a machine used to excavate tunnels with a round cross-section by quite a lot of soil and rock strata. They are often designed to bore by something from laborious rock to sand. They’ve revolutionised the way in which tunnelling work is completed worldwide as tunnels can now be bored with out disturbing the buildings and different buildings on the floor.
(With inputs from IANS)
