MTHL will drastically improve connectivity between South Mumbai with Navi Mumbai, via a 22km long route
Claiming a milestone achievement, the MMRDA on Monday launched the first Orthotropic Steel Deck (OSD) on the Mumbai Trans-Harbour Link. As per reports, the step is a part of Package-II and has been marked as one of the most complex parts of construction. The feat will notably catalyse the completion of India's largest sea bridge, drastically improving connectivity between South Mumbai with Navi Mumbai, via a 22km long route.
OSD is the ideal solution for the MTHL site
The Orthotropic Steel Deck (OSD) is a steel deck superstructure that has been stiffened both transversely and longitudinally. The structure thus carries the vehicle load more efficiently among the three panes, while improving the bridge's load-carrying capacity as compared to a concrete superstructure of the same span.
Moreover, the OSD also has lesser self-weight than concrete or composite girders, which allows the construction of a longer span of 180m. Finally, it is also more cost-effective than steel or suspension bridges. As per reports, the spans installation tender of this package has been awarded to Tata Projects Ltd.-DAEWOO JV.
World-class Engineering Marvel
The construction of the OSD marks an important moment in the engineering history of India and is a matter of pride for the country. The steel spans have been manufactured in fabrication workshop facilities located in Japan, South Korea, Vietnam, Taiwan, Myanmar and other international sites. An Aqua Float 330 was used to transport the heavy OSD to the construction ground.
Noteworthily, similar OSD structures have been used in iconic architectural specimens of the Golden Gate Bridge in San Francisco and the Lions Gate bridge in Vancouver.
MTHL to be completed by 2023
The six-lane link project is set to be completed by 2023. Once finished, it will be about 16.5 km long over the sea, along with a 5.5 km long viaduct on either side. According to the plan, this bridge has interchanges at Sewri in Central Mumbai, Shivaji Nagar at Mumbai Bay and NH-4 B at Chirle in Navi Mumbai.
The ₹17,843 crore project will also be equipped with approach sections, interchanges, intelligent transport system (ITS) and other amenities. The traffic will be monitored via CCTV from a traffic control room for security.
The MTHL has been identified as one of the most critical infrastructure projects of the city, as it will drastically improve the connectivity between Mumbai and Navi Mumbai. Consequently, the project is set to drive immense economic growth in the Mumbai Metropolitan Area.