Patna: Construction of the underground corridor of the Patna Metro is progressing at pace, with engineers undertaking one of the most technically demanding phases of the project beneath active railway infrastructure.
The stretch between Moin-ul-Haq Stadium metro station and Rajendra Nagar Terminal is being built using advanced tunnelling methods and precision engineering.
At the heart of the operation are Tunnel Boring Machines (TBMs), which are excavating deep below the surface — even as trains continue to run overhead at Rajendra Nagar Terminal. Officials describe this segment as among the most complex parts of the metro project, given the challenges of tunnelling beneath live railway tracks.
High-risk engineering, real-time monitoring
🚇✨You travel above… innovation works below…That’s the power of Patna Metro- silent, safe and unstoppable…
The underground stretch of the Patna Metro between Moinul Haq Metro Station and Rajendra Nagar Metro Station is progressing with remarkable precision and dedication.🚧… pic.twitter.com/REK602V87V— Patna Metro Rail Corporation (@PMRCLofficial) April 6, 2026
Engineers said the work involves sophisticated ground support systems, continuous earth pressure balancing techniques and real-time monitoring to ensure safety and accuracy.
The tunnelling process is being tracked round the clock to prevent any structural or technical risks, with special emphasis on maintaining the stability of the railway infrastructure above.
Ensuring safety and precision
Authorities said extensive precautions are in place to ensure that railway operations remain uninterrupted, while preserving structural integrity and maintaining precise tunnel alignment.
Experts involved in the project described the work as a significant example of engineering capability in urban infrastructure development in Patna, highlighting the use of modern technology in overcoming complex geological and operational challenges.
