This month  the Chief Minister of Bihar Nitish Kumar and Deputy Chief Minister Shri Tejasvi Yadav inaugurated the underground work for the Corridor-2 of Phase-I of the 30.91 km subway in Patna, the capital of Bihar.   

In December 2021 Delhi Metro Rail Corporation (DMRC) had awarded Larsen & Toubro Ltd (L&T) with the underground section (package PC-03) of Corridor-2 including 6 stations (Rajendra Nagar, Moin Ul Haq Stadium, University, PMCH, Gandhi Maidan and Akashvani). The first underground station will be built on Corridor-2: in the last few weeks L&T lowered the first reinforced cage to form the diaphragm wall (D-wall) for the Moin Ul Haq Stadium Station.   

In Patna two metro corridors will be built:  

• Corridor -1 Danapur-Mithapur-Khemnichak will be 17.933 km long, with 7.393 km of above ground and 10.54 km underground;
• Corridor-2 Patna Railway Station-Gandhi Maidan-Patliputra Bus Terminal will be 14.564 km long, with 7.926 km underground and 6.638 km above ground.

Patna Metro's underground project was approved on March 17, 2020: six stations will be underground on Corridor-2 and six stations on Corridor- 1. Most of the underground stations are being constructed by using the cut and cover method.  

For the construction of Package PC-03 underground section Larsen & Toubro will use 4 TBMs: 2 new machines from China Railway Construction Heavy Industry Co. Ltd. (CRCHI) and 2 refurbished machines (S71 & S72) from Hubei Tiandi Heavy Industries (THI)/Terratec which were previously used for Ahmedabad Metro Phase 1.  

The first two CRCHI TBM (DZ1090 and DZ1091) recently passed factory acceptance tests. 

For further details please visit in/90 for tunnelbuilder archive and https://patnametrorail.in. 34/22.