April 17, 2024 New York

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India’s first underwater tunnel in West Bengal! All main points right here

India’s first underwater tunnel in West Bengal! All main points right here

The primary underwater tunnel in India is being constructed as a part of the East-West Metro Hall’s undertaking, and it is going to take about 45 seconds for trains to hide the 520-meter stretch. The tunnel that is going underneath the Hoogly river in West Bengal is being touted because the Indian model of Eurostar’s London-Paris hall. An estimated price of Rs 120 crores is being spent at the undertaking.

The tunnel, which is set 2.5 kilometres lengthy, is predicted to be commissioned in 2023 following the final touch of the phase between Sealdah and Esplanade.

The tunnel runs in the course of the Salt Lake Sector V IT hub metro station within the east to Howrah Maidan within the west underneath the river. The development of the tunnel has already been finished, and it’s anticipated to be operational in December 2023 following the final touch of a 2.5-kilometer phase between Sealdah and the Esplanade.

Kolkata Metro Rail Company Normal Supervisor (Civil) Sailesh Kumar. knowledgeable PTI that the underwater alignment used to be the one selection for the undertaking’s planners because it used to be the best choice that have shyed away from demanding situations like uprooting residential spaces or different technical problems.

The undertaking, which used to be licensed in 2009, has been marred via quite a lot of delays and price escalations. As in line with officers, the price of the undertaking has just about doubled within the remaining 13 years. Out of the estimated finances of Rs 8,475 crore Rs 8,383 crore has already been spent.

The tunnel’s inner diameter is 5.55 meters and its exterior diameter is 6.1 meters. The spacing between its up and down tunnels might be round 16.2 meters.

The tunnel’s interior partitions are being made the use of high quality concrete segments which might be strengthened 275mm thick. Six of those segments are getting used to create a round lining across the circumference of the tunnel. Those are being pre-cast the use of particular moulds imported from Korea.

In an effort to save you water from the Hoogly river from coming into the tunnel, quite a lot of measures were taken. Those come with the usage of particular concrete mixes which might be composed of micro silica and fly ash. The interior partitions of the tunnel are being sealed the use of a procedure referred to as grouting. This procedure comes to filling the distance between the concrete segments with grout.

Those parts are getting used to forestall water from coming into the tunnel in the course of the jointed sections. The interior partitions of the tunnel have additionally been provided with particular auxiliary gaskets which might be manufactured from hydrophilic and neoprene.

The emergency evacuation shafts within the tunnel are being made to house as much as 760 meters lengthy. Those are being equipped to make sure the protection of passengers. Those shafts are being put in within the Howrah Station and the Strand Street station.

The underground hall of the East-West Metro is roughly 10.8 kilometres lengthy. It passes in the course of the Phoolbagan and Howrah station spaces. The remainder of the course is increased.