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IN PHOTOS: Mumbai-Ahmedabad bullet train project achieves another key milestone

Updated On: 24 May, 2026 09:25 PM IST | Asif Ali Sayed

National High Speed Rail Corporation Limited (NHSRCL) has successfully lowered the cutterhead of the second Tunnel Boring Machine (TBM) for the Mumbai-Ahmedabad bullet train project in Navi Mumbai, officials said on Sunday. Pics/X (@nhsrcl)

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The major engineering milestone was achieved at Sawli near Ghansoli on Saturday as part of the underground tunnel construction for the high-speed rail corridor. Pics/X (@nhsrcl)
The major engineering milestone was achieved at Sawli near Ghansoli on Saturday as part of the underground tunnel construction for the high-speed rail corridor. Pics/X (@nhsrcl)
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According to NHSRCL, the 13.6-metre diameter cutterhead weighs around 350 tonnes and forms a critical part of the TBM’s main shield assembly

According to NHSRCL, the 13.6-metre diameter cutterhead weighs around 350 tonnes and forms a critical part of the TBM’s main shield assembly

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The operation marks the final stage of the primary assembly process before the machine becomes fully operational

The operation marks the final stage of the primary assembly process before the machine becomes fully operational

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The second TBM will tunnel from Sawli towards Vikhroli in Mumbai, while the cutterhead for the first Tunnel Boring Machine was lowered at Vikhroli last week

The second TBM will tunnel from Sawli towards Vikhroli in Mumbai, while the cutterhead for the first Tunnel Boring Machine was lowered at Vikhroli last week

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Officials said both TBMs will now undergo final assembly and commissioning trials before excavation work begins in the first week of July

Officials said both TBMs will now undergo final assembly and commissioning trials before excavation work begins in the first week of July

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The machines are specifically designed to excavate a single large tunnel capable of accommodating both up and down railway lines of the Mumbai-Ahmedabad high-speed rail corridor

The machines are specifically designed to excavate a single large tunnel capable of accommodating both up and down railway lines of the Mumbai-Ahmedabad high-speed rail corridor

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NHSRCL stated that each cutterhead is equipped with 84 cutter discs, 124 scrapers and 16 bucket lips, officials said, adding that these components help in excavation and the removal of debris during tunnelling operations

NHSRCL stated that each cutterhead is equipped with 84 cutter discs, 124 scrapers and 16 bucket lips, officials said, adding that these components help in excavation and the removal of debris during tunnelling operations

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