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The Mumbai Metropolitan Street Growth Authority (MMRDA), which is developing the 21.7-km-long Mumbai Trans Harbour Hyperlink (MTHL) over the ocean between Navi mumbai and south Mumbai, will launch the primary Orthotropic Metal Deck (OSD) on the sealink within the first week of January 2022.
MMRDA metropolitan commissioner SVR Srinivas reviewed the preparation work for the launch of an Orthotropic Metal Deck span (OSD) from the Package deal-1 web site (in Sewri) on Tuesday.
The OSDs, additionally referred to as metal spans which are utterly made from metal as an alternative of concrete, are getting used for the primary time within the nation, stated an official.
These metal decks are getting used to make sure that ships traversing the channel adjoining MTHL have navigation area to go beneath the bridge. The selection of standard concrete decks would have meant constructing nearer foundations for the piers.
In accordance with officers, greater than 70 metal spans starting from 65 metres to 180 metres, shall be used on the MTHL. Of the overall size of MTHL, a minimum of 25 per cent of it (4.5 kilometres) may have these spans made from metal.
The primary span shall be launched within the first week in January on bundle 2 of the bridge.
“To move these metal spans (minimal 65-70 metres and most 180 metres lengthy), that are comparatively bigger than concrete segments, a particular barge has been made which is as large as a soccer area. The dimensions of the barge is 110 metres X 64 metres, and it’ll transport the metal spans from the land into the ocean the place they must be positioned,” stated an official.
MTHL will join Mumbai Bay from Sewri to Chirle in Navi Mumbai (Navi mumbai airport) and is anticipated to be accomplished by 2023. The estimated price of the undertaking is Rs 18,000 crore and 60 per cent of the work has been accomplished.
In figures
* These metal pans OSD are being fabricated in workshops in Japan, South Korea, Vietnam, Taiwan and Myanmar.
* Whole size on the MTHL of OSD is 4.5 kilometres
* OSD structural metal: 96,250 tonnes
* Most dimension is 180 metres.
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