E-W Metro tunnelling work likely to be completed in 10 monthsPTI | Kolkata | Updated: 21-02-2020 18:49 IST | Created: 21-02-2020 18:49 IST
Underground tunnelling work for the East West Metro corridor is likely to take 10 more months
to be completed, as a key machine has been damaged beyond repair, an international expert committee appointed by the
Kolkata Metro Rail Corporation (KMRC) said here on Friday. Besides, the safety of the people living in
dilapidated buildings - many of which were built over 120 years ago - in one part of the route is a cause for concern,
said Leonard John Endicott, a geotechnical expert and head of the committee.
"The biggest challenge is that many buildings in the area are in poor condition. Our concern is the safety of the
people," he told newspersons here. The tunnelling work, which was put on hold after one
of the two tunnel boring machines (TBM) hit an aquifer on August 31 last year in Bowbazar area leading to severe ground
subsidence and collapse of buildings, will recommence in full swing in a day or two, Endicott said.
With the TBM getting damaged beyond repair in the accident, the work will have to be completed with one TBM
only. The working TBM has been moved a few rigs to check for all safety parameters put in place to ensure that there is no
repeat of the previous incident. "We are being supercautious," Endicott said.
Sealdah from Bowbazar. Thereafter, it will take three months for the TBM, which is a huge machine, to turn around.
"It will take another two months for the machine to dig on the other side and reach up to the point where the
has 50 per cent more capability to ensure that the ground holds during tunnelling work.
"Special measures have been taken to ensure that water does not seep into the tunnel," he said adding that work will
be stopped within 60 minutes of noticing any abnormality during tunnelling in the area.
The damaged TBM, which Endicott said is a "write-off", will be dismantled and taken away from the underground shaft.
The Calcutta High Court had on February 11 allowed resumption of tunnel-boring work for the East West corridor.
Accepting a report by IIT-Madras, the court's division bench directed the KMRC, the executing agency for the project,
to restart operations in Bowbazar, in consultation with the institute.
The bench comprising Chief Justice TBN Radhakrishnan and Justice Arijit Banerjee had in September last year ordered
suspension of tunnelling work till further orders. Three months later, the KMRC, in view of a report
prepared by its expert committee, moved the court seeking its permission to resume operations.
On a prayer by an NGO to get the expert committee report vetted by an independent agency, the KMRC requested
IIT-Madras to review its findings. The institute, in its report, stated that tunnel-
boring work could be resumed. On February 13, the 4.88km-long first phase of the
functional. Inaugurating the service, Railway Minister Piyush
Goyal had said the entire 16.5-km stretch of the corridor - from Sector V to Howrah Maidan - is likely to be ready in two
years. The East West Metro corridor was earlier scheduled to
be completed by June, 2021.
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)
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