India’s first underwater rail tunnel completed ahead of schedule

The deadline was July this year. However, engineers and employees Afcom Transtonnelstroy and Kolkata Metro Railway Corporation Ltd, both entities for the Metro East-West application completed the boredom of the first tunnel under the Hooghly River country to establish the underground link between Howrah and Kolkata.

Rachna a gigantic boring tunnel (TBM), has been made to widen the submarine tunnel that stretches over a length of 502 meters below the river. The Transtonnelstroy components is an Indo-Russian joint venture. The machine was brought from the factory of Herrenknecht AG in Schwanau in Germany. The entire project has a length of 16.6 km, 10.8 km runs underground. Of this 10.8 km, 502 meters are under water. The project connects Howrah in the west and east of Salt Lake.

The excavation of the tunnel was the most difficult and most critical in the overall project. The work was completed within one month and six days, about 50 days before the deadline. The project is built by Afcom Transtonnelstroy and implemented by kmrcl.

A high-level kmrcl, who asked not to be identified, said tunnel excavation work began on April 14, 2016. “The total credit for the completion of the work before the gate books deadline is 250 engineers, technicians and workers , Who have worked day and night to complete the task.Accordingly, we dug 35 40 meters every day, after which we completed the excavation of the entire length of the tunnel of 520 meters in just over a month, “said the Kmrcl official. The 16.6 km stretch will have 12 stations, six of which will be underground, while the remaining six stations will be high on the slopes. The final start-up of the project start-up project should be scheduled for December 2019, after which it will be operational.

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