2nd TBM makes a Breakthrough at Jaipur Metro’s Badi Chaupar Station
Note – just like the 1st TBM, a traditional breakthrough wasn’t accomplished here by TBM 2. An excavator was brought in to excavate the retrieval shaft in which the TBM had been sitting for about a year’s time.
Yesterday, the 2nd Robbins Tunnel Boring Machine, operated by the CEC-CICI JV to build Jaipur Metro’s 2.35 km UG-1B package, revealed itself to workers after excavation work concluded on its side of the eastern shaft at Line-1’s Badi Chaupar Station.
This Ø6.52m Earth Pressure Balance TBM was commissioned from the operational Chandpole Station’s north shaft in October 2015 to build the down-line tunnel under the city’s historic district and had to be operated with utmost precision.
To rehash from the other post, geology for the contractor was not a concern as it comprised of silty sand and minor amounts of gravel & clay. The TBM took a long time due to the presence of weak heritage buildings (such as the 300 year old Chandpol Gate) strewn throughout its influence zone and the painful relocation of 13 temples on sites earmarked for the Chhoti Chaupar and Badi Chaupar Stations. As such, this TBM also sat idle at different places at different times, including inside the TBM retrieval shaft for about a year waiting for excavation work to commence and be completed.
Some images –
For more updates, check out the Jaipur section of the The Metro Rail Guy!
If this is the first breakthrough then what happened at Chhoti Chaupar station? Did both Tbms pass through it?
Correct! In fact both TBMs passed through the Badi Chaupar Station as well. Going forward, they’ll demolish/remove the temporary rings built within the station boxes.
It is proud-full moments to me that i was part of team this project and grate achievement to all team members but i left this team four month ago, however very very congrats to all workers and engineers to hard working in heritage city to successfully completed the tunnel work.
Hello sir appreciate your work, I want answer of my question, I want to do internship in underground metro anywhere in India from January 2020 will guide me to find which projects which are under construction… Hoping for the answer
I have done civil engineering. I have a total experience of 6 years. I have been working in the underground metro for 3 years.I have worked in the package-6 line-3 for 2 years in international airport, domestic airport & santacruz in Mumbai. Right now I am working in Underground Metro Pune from Sixth Month in swargate metro projects. Apart from these, I have also worked in infrastructure. I hope you give me a chance. My contact number is 9929290790