Delhi Metro’s TBM Starts Tunneling from Chirag Delhi to GK
Tunneling work on the last section of the Delhi Metro’s 38.235 km Magenta line has begun! On Sunday, the Pratibha-FEMC JV team for contract CC-23 of the Phase 3 project started tunneling work for the up-line tunnel from the Chirag Delhi station towards the Greater Kailash (GK) station. At the time of publishing this, 2 temporary rings have been placed.
![Photo Copyright: Ranjeet Singh Yadav](https://themetrorailguy.com/wp-content/uploads/2016/01/CD3.jpg)
Up-line TBM at Chirag Delhi’s TBM launch shaft – Photo Copyright: Ranjeet Singh Yadav
![Photo Copyright: Ankur Tyagi](https://themetrorailguy.com/wp-content/uploads/2016/01/Upline1-600x390.jpg)
Photo Copyright: Ankur Tyagi
![Photo Copyright: Ankur Tyagi](https://themetrorailguy.com/wp-content/uploads/2016/01/Upline2.jpg)
Photo Copyright: Ankur Tyagi
![Alignment of Chirag Delhi - Greater Kailash section - view Delhi Metro information](https://themetrorailguy.com/wp-content/uploads/2016/01/DelhiMetroMap.jpg)
Alignment of Chirag Delhi – Greater Kailash section of Delhi Metro’s Magenta line – view Delhi Metro information
Parts of this TBM were lowered into the launch shaft in November & December 2015. Here are a couple of images from a post from last month:
![View of the back-up gantry from the bottom - Photo Copyright: Ranjeet Singh Yadav](https://themetrorailguy.com/wp-content/uploads/2015/12/ChiragDelhi3.jpg)
View of the backup gantry system from the platform level – Photo Copyright: Ranjeet Singh Yadav
![Mid shielf being lowered - Photo Copyright: Harpreet Singh Riar](https://themetrorailguy.com/wp-content/uploads/2015/12/ChiragDelhi2.jpg)
TBM’s mid-shield being lowered – Photo Copyright: Harpreet Singh Riar
![Segment erector](https://themetrorailguy.com/wp-content/uploads/2016/01/CD1.jpg)
Segment erector being lowered & assembled – Photo Copyright: Ranjeet Singh Yadav
The distance between the Chirag Delhi and Greater Kailash stations is only 545m – one of the shortest on the line, so a breakthrough at Greater Kailash can be expected to take place in April this year. But wait..I have more news! A week prior to this TBM commencing work, the Pratibha-FEMC team started to lower parts for another TBM at the same shaft to bore the parallel down-line tunnel. That TBM will be the last on the entire line to start & complete work.
![Photo Copyright: Anand Prasad](https://themetrorailguy.com/wp-content/uploads/2016/01/DownLineEye-Seal.jpg)
Down-line tunnel’s eye-seal being lowered on January 11 – Photo Copyright: Anand Prasad
![Midshield of the downline's TBM was lowered on January 19 -](https://themetrorailguy.com/wp-content/uploads/2016/01/Midshield1.jpg)
Midshield of the downline’s TBM was lowered on January 19 – Photo Copyright: Lalvesh Tiwari
![Photo Copyright: Ankur Tyagi](https://themetrorailguy.com/wp-content/uploads/2016/01/Upline3.jpg)
Down-line & Up-line TBMs at Chirag Delhi – Photo Copyright: Ankur Tyagi
Over the next few weeks, the team will continue to lower more parts and assemble them to make the down-line TBM launch ready for its initial drive in mid-February.
For more updates on Delhi Metro’s Phase III, please visit the Delhi section of The Metro Rail Guy!
– TMRG
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