- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 11 Mar 2019
East West Metro Tunnel, Calcutta
It has taken almost a century to realise Sir Dalrymple-Hay concept, and it is expected that the East West Metro Railway will have a significant and far reaching impact on Calcutta's transportation system in years to come and the way people commute between these two congested city centres.
The entire stretch is divided into three parts:
- UG-1 (underground portion from Howrah Maidan to New Mahakaran).
- UG-2 (underground portion from Esplanade to Subhash Sarobar).
- Elevated portion from Subhash Sarobar to Salt Lake Sector-V.
The works include 2-tier Howrah Maidan Station, one cross-over near Howrah Maidan Station, a 4-tier Howrah Station adjacent to present Howrah Railway Station (Kolkata's Railway Hub to rest of India) to provide interface between underground and surface railway transportation for commuter traffic coming to the cities from suburbs.
The tunnel is being constructed with pre-cast segments (5 regular segments and 1 key) of M50 grade concrete along with all necessary arrangement to ensure waterproofing, resistance to earthquake and flotation for a design life of 120 years.
During tunnelling (other than utilities and land issues), the biggest challenge is to ensure the safety of buildings and structures above ground (some of them are almost a century old and remnants of the colonial era) with suitable preventive measures.
This article was originally published here by ICE on 15 June 2017. It was written by Ayanangshu Dey.
 Related articles on Designing Buildings Wiki
- Articles by ICE on Designing Buildings Wiki.
- Excavating plant.
- India looks at using plastic instead of sand.
- India needs to build more infrastructure fast. Here's how.
- Indian construction industry.
- Indian infrastructure.
- Follo Line, Norway.
- Stad Ship Tunnel.
- Trenchless technology.
- Tunnel Engineering Exhibition 2017.
- Tunnels of the world.
Featured articles and news
Chancellor announces latest Winter Support packages.
Tapping technology to boost infrastructure and create jobs.
4 ways to ensure certificates are valid.
White elephant construction projects.
How Paul Williams bent over backwards to overcome racial barriers.
Organisation revises actions around dealing with COVID-19.
CIOB, NFCC, RIBA, RICS call for changes ahead of Building Safety Bill.
Developments in the Future Homes Standard.
An American chimney feature with a colourful past.
Homes based on need, not ability to pay.
Historic England adds 216 entries to the 'at risk' register.
Will cycling and walking provisions be preserved?
Assembly point levels range from relative to ultimate.
Signs are pointing to a recovery for the construction industry.