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Mumbai connections
The much-anticipated connection between Mumbai’s new Coastal Road and the Bandra-Worli Sea Link is just the latest in a series of the city’s sea crossings to be equipped with mageba bridge bearings and expansion joints.
Considering Mumbai’s coastal location and island character, the city’s enormous population can benefit greatly from the construction of sea crossings to facilitate transportation across the expanses of water that surround and divide the metropolis – and mageba is always happy to play a role. Back in 2009, mageba’s subsidiary in Kolkata was proud to design and supply the bearings and expansion joints required for the construction of the Bandra-Worli Sea Link, including 26 TENSA®MODULAR joints, 126 RESTON®DISC bearings and hundreds of LASTO®BLOCK elastomeric bearings. And in 2021, the company went on to supply over 400 RESTON®SPHERICAL bearings and numerous TENSA®MODULAR expansion joints for the Mumbai Trans-Harbour Link.
Our latest contribution to the city’s network of sea crossings is to support the construction of a vital connection between the new Coastal Road and the south end of the Bandra-Worli Sea Link. This involved the design and fabrication of the expansion joints and bearings required by the new connection, including 10 TENSA®MODULAR joints, 616 LASTO®BLOCK elastomeric bearings, and 8 special ERADIQUAKE™ bearings to support the ends of the connection’s two arch structures.
The ERADIQUAKE™ bearing, originally developed by RJ Watson Inc. in the USA, is designed to also function as a seismic isolator in case of an earthquake. On this project it was selected as an alternative to the elastomeric type anticipated in the bridge’s design, thanks to the key benefits it offers in meeting the structure’s needs. Most importantly, it enables the high specified loads and rotations to be accommodated in the limited space available – whereas an elastomeric bearing with a large-enough plan area to carry the vertical loads would need to be prohibitively high in order to offer the required rotational flexibility.
Further advantages of ERADIQUAKE™ isolation bearings over other isolation bearing types include:
The area transmitting vertical loading is not reduced due to horizontal displacement.
They can be designed for different stiffnesses in the longitudinal and transverse directions.
They do not experience vertical displacement as a result of horizontal movement.
By being able to offer a wide range of products in general, and innovative solutions whenever required, our team in India is already looking forward to their next opportunity to supply bearings and expansion joints for a major Indian sea crossing – whether in Mumbai or anywhere else.
Client’s engineer: AECOM (Package – 1 & 2)
Owner: MUNICIPAL CORPORATION OF GREATER MUMBAI
Contractor: Larsen & Toubro Limited (Package-1), HCC – HDC JV (Packge-2)
