Construction has started for India’s 8th underground metro project! 🙂
Workers from Larsen & Toubro earlier this month began construction work to build a shallow guide-wall for a Tunnel Boring Machine (TBM) launch shaft adjacent to Kalupur Railway Station on Ahmedabad Metro’s 20.737 km east-west line connecting Vastral Gam with Thaltej Gam.
Two refurbished Terratec machines, which recently saw action to build Delhi Metro’s Pink Line (from either CC-20 or CC-24), will be lowered and commissioned from this shaft in mid-2018 to build the line’s tunnels as part of a Rs. 901 crore contract for the 4.378 km underground Package-2 which got awarded to Larsen & Toubro in January 2017. Their scope of work involves the construction of twin tunnels from the Kalupur Railway Station to the West Ramp through 2 underground stations at Ghee Kanta and Shahpur.
The shaft’s site at Kalupur is sandwiched between platform #12 and RC Technical Institute. The adjacent station’s construction is part of the 2.446 km Package-1 (Kalupur Railway Station – East Ramp) which was awarded to Afcons Infrastructure also in January 2017. The site for their TBM launch shaft remains unknown at this time.
Here are some images of the TBM shaft’s guide-wall at Kalupur shot earlier this week –
Here’s a nice video which briefly touches the topic of guide-walls between the 30-60 seconds mark, prior to the commencement of piling work for the shaft’s diaphragm wall –
For more updates, check out the Ahmedabad section of The Metro Rail Guy!