'MTHL' OSD span of 119 meters launched in Package-1

18 Jan 2022 CW Team

On Friday, the first Orthotropic Steel Deck (OSD) span, having a length of 119 meters and weight of 1331 metric tonne, was launched in Package 1. The Mumbai Metropolitan Region Development Authority (MMRDA), which is executing the MTHL bridge construction, provided details regarding the latest project work developments.

L&T- IHI Consortium has been awarded Package 1. It includes constructing a long bridge covering Mumbai Bay having a length of 10.38 km. The long bridge includes the Sewri interchange at the Mumbai side. The OSD refers to the steel Deck Superstructure responsible for efficiently carrying vehicular load within the three planes. This results in an improvement in the load-carrying capacity in comparison with Concrete Superstructure during a similar time period. Additionally, it has a longer span and lower self-weight in comparison with concrete or composite girders. It has a span of 180 meters specially designed for this project with the help of OSD.

Taking the condition of the MTHL site and bigger pier-to-pier distances into consideration this will be an ideal solution. In comparison with the cable stay and suspension bridges, it is more cost-effective. A barge had been specially designed and manufactured to transport the bulky OSD sections.

On January 3, under package 2 the first OSD span had been launched that led the way for the development of further 31 OSD spans in the package.

An intelligent transport system (ITS) along with other required amenities will be installed on the sea bridge. Upon completion, in 2023, the bridge will link Navi Mumbai and South Bombay. The travel time for the same will be 25 minutes. The project will approximately cost Rs 17,843 cr.

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