German tunnel boring machine (TBM) manufacturer Herrenknecht AG on August 17 completed factory acceptance tests (FAT) for TBM S1074 – the second of three new TBMs at their Guangzhou facility in China which will be used to build a section of Mumbai Metro’s 33.5 km Line-3 tunnels between Cuffe Parade and Aarey Colony.
The CEC-ITD Cem-TPL JV will deploy this earth pressure balance TBM along with two others (S-1073 which passed FAT in June & S-1075 which is currently being manufactured) to construct twin tunnels on the line’s 6.081 km package UGC-04 from the Worli Station’s North Shaft to the Dharavi Station’s West Shaft through TBM launch shafts located at Naya Nagar in Mahim and Siddhivinayak Station. Five months ago they began casting segments at their yard in Wadala which by this year-end will start getting fed & erected by the TBMs to form the tunnels’ rings.
Note – they’ve colored the cutterhead to match MMRC’s logo.
• Package UGC-02 – 1 Terratec TBM in China (new)
• Package UGC-04 – 2 Herrenknecht TBMs (1st) in China (new)
• Package UGC-05/06 – 2 Terratec TBMs in Delhi (refurbished) + 1 Terratec TBM in China (new)
• Package UGC-07 – 2 STEC TBMs in Singapore (refurbished)
For more updates, check out the Mumbai section of The Metro Rail Guy!