In a recent development in the country’s infra sector, Tata Projects in a joint venture with Daewoo E&C of South Korea, has bagged Mumbai Trans Harbour Link (MTHL) project at an investment of Rs.5,612 crore, whereby, the contract involves designing and building a part of India’s longest sea-bridge. While the Tata JV emerged as the lowest bidder for both the Sea Packages 1 and 2, however, it was awarded only one of the packages (package 2) as provided in the tender conditions. The package 2 awarded to Daewoo-Tata Projects JV involves construction of a 7.8 km bridge section across the Mumbai Bay, including Shivaji Nagar Interchange at Navi Mumbai. The Tata Projects is one of fastest growing construction companies and together with its Korean partner, brings latest construction techniques to deliver this milestone project. The venture will use reverse circulation drill method for foundation and erection of a large block (180 m) orthotropic steel deck structure at the navigational span. Specialized steel will be imported from Japan for fabrication. The Reverse Circulation Drilling to be deployed is a method of piling in hard rock strata wherein the machine drills through the rock and the cut material gets mixed with water. The machine brings back the water to the surface by using pressurized air. This method is faster and proven to be successful than conventional bored piling method in hard rock as high drilling penetration rates can be achieved using this method as it is versatile, said official sources.
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