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Milestone progress at Lucknow metro 10 Aug 2017

Patrick Reynolds for TunnelTalk

First TBM breakthrough for construction of the Lucknow Metro in India marks a significant milestone for the project. The TBM emerged through the headwall at the Hazratganj station in the centre of the city.

First TBM breakthrough at Lucknow metro
First TBM breakthrough at Lucknow metro
Fig 1. Core of the first two lines of the Metro are aligned underground
Fig 1. Core of the first two lines of the Metro are aligned underground

The EPC (engineering, procurement and construction) contractor Gulermak/Tata JV now plans to dismantle and return the Terratec EPBM for its next drive from Sachivalaya to Hussainganj station. Terratec supplied the JV with a pair of 6.52m diameter EPBMs for the twin tube tunnelling works on its 3.7km long underground contract at the southern end of the Metro’s North-South Corridor Project, Phase 1A, from near Charbagh station to the KD Singh Babu Stadium station. The contract includes three open cut stations at Hazratganj, Sachivalaya and Hussainganj.

In a statement following the breakthrough, Managing Director of the Lucknow Metro Rail Corporation ((LMRC) Kumar Keshav praised successful completion of the first TBM drive and said that the second drive “posed an enormous technical challenge”.

The 812m long section of the first TBM drive from Sachivalaya to the Hazratganj station runs below a heavily built-up area of Lucknow with the twin tube tunnels passing under a number of commercial buildings with deep foundations. To clear the foundations, the track level in the running tunnels range from 12m-15m below ground surface. The complex first drive took just more than five months to excavate.

Detail design for the client for the underground alignment is Systra India.

Celebrations of the significant milestone
Celebrations of the significant milestone

Lucknow Metro is being developed on a North-South and East-West corridor, both of which include underground and elevated sections. The East-West section involves a longer tunnel stretch from Charbagh to near Thakurganj with six intermediate underground stations (Fig 1).

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