Uttrakhand Tunnel Collapse. (AP Picture)
Expediting efforts for protected evacuation of the employees, the Uttarakhand authorities on Wednesday intensified rescue operations on the Silkyara Tunnel in Uttarkashi the place 41 staff stay trapped.
“About 67 per cent augur drilling has been completed to give emergent safe passage to the rescue team and 42 metre horizontal pipe have been drilled through in the tunnel,” in accordance with a authorities press launch.
“The 2 km section of the tunnel, which completed concrete work ensuring the safety of the workers, is the focus of the rescue efforts. In this secured portion of the tunnel, electricity and water supply are operational, and provisions, including cooked food and medicines, are being delivered through additional pipelines of 6-inch diameter in addition to existing 4-inch lifeline,” added the discharge.
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Video communication has been established with the workforce, which additional boosted the morale of the trapped staff.
Numerous authorities companies have been mobilised, every assigned particular duties to make sure the protected evacuation of the employees. Nationwide and Worldwide tunnel consultants are current at web site to advise on rescue operation.
Key updates on rescue operations:
NHIDCL Lifeline Efforts:
● The second lifeline for meals distribution is functioning effectively, guaranteeing an ample meals provide like roti, subzi, khichdi, daliya, oranges, bananas along with provide of medicines and different necessities like garments corresponding to T-Shirt, below clothes, tooth paste, cleaning soap and many others.
● Modified communication system with wire connectivity has been developed by NDRF/SDRF by which clear communication is made. Individuals inside reported at morning that they’re protected.
● The outdated lifeline service level/speaking level (RHS) has been shifted from the present level to a safer place and guarded.
● To present emergent protected passage to the rescue crew, an escape passage by means of field culverts, pipes for a size of 67 meters has been accomplished.
Horizontal Boring by NHIDCL
● NHIDCL has resumed horizontal boring from the Silkyara finish to rescue staff utilizing an Augur boring machine. As on date, 42 meter of pipes has been inserted.
● Fabrication of a protecting cover for the drilling machine is underway.
Vertical Drilling for Rescue by SJVNL
● SJVNL’s machine for the vertical rescue tunnel building has arrived on the web site, and has been put in.
Horizontal Drilling from Barkot Aspect by THDCL
● THDC has initiated the development of a rescue tunnel from the Barkot finish, with 4 blasts already accomplished, leading to a 9.10 meter drift. Efforts are being made to hold out three blasts per day.
Perpendicular-Horizontal Drilling by RVNL
● Equipments for micro tunnelling required for horizontal drilling to recue labourers has reached web site. Extra again up machines are in transit.
Vertical Drilling Towards Barkot Finish by ONGC
● ONGC is mobilizing equipment from the USA, Mumbai, and Ghaziabad for vertical boring.
Drift Tunnel by Handbook-Semi Mechanized Technique by Joint Staff of THDCL/Military/Coal India and NHIDCL:
● Work is underway to create a drift contained in the tunnel, with a protected channel established from 180 meters to 150 meters. The Military is mobilizing field culverts for this objective. Fabrication of 08 frames has been accomplished.
Highway Slicing and Supportive Work by BRO:
● BRO has accomplished building of strategy highway for vertical drilling by SJVNL and RVNL. BRO can be constructing strategy highway for ONGC with geological surveys performed by ONGC.
On 12 November, a portion of under-construction tunnel collapsed because of particles falling in a 60-meter stretch on the Silkyara facet, the place 41 staff had been trapped.
5 companies—ONGC, SJVNL, RVNL, NHIDCL, and THDCL— had been pressed into service with particular tasks, working collaboratively with occasional job changes for operational effectivity to rescue staff.
The Silkyara tunnel, about 30 km from the district headquarters of Uttarkashi and a seven-hour drive from the Uttarakhand capital Dehradun, is a part of the bold Char Dham all-weather highway venture of the central authorities.
With inputs from companies