Robbins TBM gains factory acceptance for MML-3 project
A Robbins Company slurry tunnel boring machine (TBM) has passed its factory acceptance test (FAT) to begin works on the Mumbai Metro Line 3 (MML-3).
The Mumbai Metro Rail Corporation’s (MMRC) 33.5 km long MML-3, includes the construction of 27 underground stations, which will ease congested traffic and rail lines, increase safety, reduce pollution and modernise Mumbai’s transport system.
The MML-3 will provide a mass rapid transit system to supplement Mumbai’s currently over-burdened system and provide the infrastructure to connect key areas of the city, including 6 business districts, 30 educational institutions, 30 recreational facilities, domestic and international airports, and 5 interchange points for suburban railways.
Robbins India Managing Director Kapil Bhati said that it is an honour to be able to provide the machines for such important works.
“Mumbai Metro is one of the most prestigious metro works in the country, and Robbins’ involvement in providing suitable machines and associated services is an honour,” said Mr Bhati.
The 6.65 m diameter Robbins slurry TBM is one of two to be provided in 2017 to excavate 3.5 km parallel tunnels between Mumbai Central and Worli station sites, which is under contract UGC03 to the Dogus–Soma joint venture (DSJV).
The machine was selected for its ability to cope with challenging terrain, including fresh to weathered basalt, clastic sedimentary rock, and water pressures up to 3 bar.
The TBM, which utilises cutterheads fitted with wear protection, wear detection bits and abrasion resistant plating, passed its FAT in Singapore on 4 September and will begin excavation operations in late 2017.
Speaking on the TBM’s ability to operate in complex geology, DSJV Project Manager Tamay Sayin said, “I have worked with slurry TBMs on similar geology globally.
“Slurry TBMs have real power and will suit the hard rock geology of our Mumbai Metro contract 3.
“The water table and variable geology, especially basalt of higher hardness, can be easily tackled by Slurry TBMs.”
SOMA Senior Vice President DV Raju said one of the benefits of working with a Robbins TBM was the company’s industry experience and professionalism.
“There are few companies in the international arena that are as professional as Robbins,” said Mr Raju.
“Robbins has been very helpful to DSJV since the inception of the project and will be our partners until the end of the contract.
“Robbins’ presence in India including field service crews will be a great help for us in future.”
The second TBM is expected to undertake its FAT at the end of 2017.
Robbins will also provide two crossover XRE TBMs for a separate Mumbai Metro Line 3 contract in 2018.
Over the course of the project, a total of 17 TBMs will be acquired to construct various sections of the tunnels.
The MML-3 is anticipated to be operational by 2021.
For more information visit the Robbins website.
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