The Prime Minister recently opened the Mumbai Trans Harbour Link (MTHL), India’s longest sea bridge, connecting South Mumbai to Navi Mumbai and use of unique technologies.
About Mumbai Trans Harbour Link (MTHL) project:
- MTHL is an elevated road bridge that will connect Mumbai to its satellite city, Navi Mumbai.
- The bridge is also known as the Sewri–Nhava Sheva Trans Harbour Link and officially named the Shri Atal Bihari Vajpayee Trans Harbour Link.
- This is an access-controlled bridge from Sewri (Mumbai) to Chirle (Navi Mumbai) with three interchanges, that would reduce the trip time from two hours to roughly 15-20 minutes.
- It is also the world’s 10th longest sea bridge.
- Interchanges of MTHL:
- Sewri in South Mumbai, connecting the MTHL to the Eastern Freeway (Mumbai side).
- Shivaji Nagar in Ulwe connecting the MTHL to the Navi Mumbai Coastal Road project.
- Chirle interchange, where one arm will connect State Highway-54, and the second will connect NH-4 Mumbai-Pune Highway.
Key Technologies used for MTHL:
- Open Road Tolling System: Also called all-electronic tolling, cashless tolling, the collection of tolls without the use of toll booths, to drive through the toll plaza at highway speeds without slowing down.
- The MTHL is the first project in the country with an open road tolling system.
- Orthotropic steel deck technology: It is a method of welding steel plates together to create a flat, solid steel deck, which is stiffened by a grid of deck ribs and welded to floor beams and girders.
- About 85,000 Metric Ton of orthotropic steel has been used which is similar to the weight of a Boeing 747 aircraft.
- Steel bars: Nearly 1,70,000 Metric Ton of steel bars equivalent to the weight of 17 Eiffel Towers was used.
- Prestressing wires: About 48,000-km-long prestressing wires have been used which is four times the diameter of earth.
- Use of concrete: 9,75,000 cubic meters of concrete used which is six times the concrete used for the Statue of Liberty.
- Pile Liners: Liner or casing is one type of steel formwork that gives the desired shape to green concrete and is circular in shape.
Ref : Source
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