Patna Metro 7th TBM Breakthrough Keeps Concrete Pumps Busy

Patna Metro’s Blue Line recorded its seventh tunnel breakthrough on June 10, with TBM-04 completing roughly 681 metres of downline tunnel between Moin-ul-Haq Stadium and Rajendra Nagar stations. Officials called it one of the most technically challenging stretches on the corridor. TBM-03 continues on the parallel upline and is expected to reach Rajendra Nagar by end-June.

Each breakthrough shifts the workload from boring to finishing: cross-passages, track-bed concreting, station box fit-outs and grouting — sustained duty for concrete pumps, batching plants and transit mixers around the underground section. PMRCL says the Blue Line’s underground works are targeted for completion by the end of 2026, which compresses a heavy concreting programme into the next two quarters.

The 16.2-km Blue Line runs from Patna Junction to the Patliputra Bus Terminal with six underground and six elevated stations. A 3.45-km elevated stretch is already operational, and services up to Malahi Pakri were recently cleared after safety inspections, keeping pressure on contractors to hold timelines.

What it means for buyers: Concreting equipment owners in Bihar should expect strong short-term hire demand around Patna’s underground section as lining and station finishing peak through late 2026.