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From the Desk of Chairman Kolkata had a tradition over centuries going first in most of social and engineering achievements in the country. Our domain being Engineering views are centered towards engineering achievements. Construction of unprecedented Howrah Bridge (now Rabindra Setu), Second Hooghly Bridge (now Vidyasagar Setu), underground Metro Tubes North to South and East West Metro below the river Ganges are unparalleled technological achievements in the country. East West Metro via Esplaned faced challenge of subsidence pf overburden structure while approaching Sealdah more precisely while tunneling below Durga Pithuri Lane of Bowbazar, Madan Dutta Lane and Gour Datta Lane.
Several buildings developed deep cracks in congested locality causing displacement of habitants. Entire neighbourhood of affected buildings were shifted to safer places by the authority. Question before the technocrats – why it happen, the reason behind and remedies. A 40 mm subsidence of the soil around the Metro work site on Durga Pithuri Lane covering 300M radius led to cracks in 18 buildings in the Bowbazar neighbourhood, stated the preliminary report by expert at Jadavpur University that was submitted to Kolkata Municipality Corporation. The report also flagged concern over the fate of ageing houses on Durga Pithuri Lane once the Metro services begin. The soft soil where several buildings were damaged by subsidence is being firmed up with grouting to prevent rerun of mishaps. To intensify the grouting work in cave in zone extensive grouting is carried out to strengthen the area to rectify the damage caused inside the Metro shaft. But hardened concrete has to be peeled off before joining the West bound Metro tunnel inside the shaft. Kolkata Metro Rail Corporation (KMRC) engineers were quick to allay such fears and said the subsidence incidents were caused during the tunnel construction and would not recur when trains plied the tunnels as hi-tech systems had been designed to absorb vibrations and confine them withing the twin tunnels. Metro Engineers and Engineers of construction agencies are equally confident to tide over the crisis. Our gratitude to Jadavpur University and IIT Roorkee for coming forward in solving never faced such technological problems. Amal Biswas |
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Within a
short span of time, we lost one of our valued members
of the Association. |
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| Demise of Er. Samiran Sen was
a Bolt from the Blue on 16.06.2022. He did his degree in
Civil Engineering from IIT Kharagpur in 1978. Professionally
Er. Sen achieved a place of recognition which could be
assessed by his appointment as Technical Expert for health
checking of flyovers. He was Director of Consulting
Engineering Services before starting his own Consultancy
business in the name of AMEC and Chairman of CEAI, N&NE
Zone. He lost his wife a few years ago and survived with two
sons. AMEC has become poorer in his absence. Om Shanti. |
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