The Delhi Metro Rail Corporation (DMRC) has completed work of one of the longest tunnels on Phase 3 with the TBM breakthrough at Lajpat Nagar after boring a 1565m long tunnel from South Extension.
The tunnel is on the Majlis Park – Shiv Vihar corridor and is the second longest tunnel of the third phase of expansion. The longest tunnelling drive of this phase is from Nizamuddin to Ashram on the same corridor with a length of 1691m.
The tunnel from South Extension to Lajpat Nagar is one of the twin tunnels being constructed and has a diameter of 5.8m.
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During the course of construction of the tunnel, the TBM underpassed the densly populated areas of Kotla and Defence Colony, which required very thorough instrumentation and monitoring. The maximum depth of the tunnel in this drive was approx. 21m in the Defence Colony Area.
The Lajpat Nagar Metro station is being developed into a major interchange hub where commuters will be able to change trains between the Faridabad – Kashmere Gate corridor (currently operational between Badarpur and ITO) and the Majlis Park – Shiv Vihar corridor of Phase 3.
The Majlis Park – Shiv Vihar Metro section is a 58km long corridor, which will cover the arterial Ring Road of the national capital. This entirely standard gauge section is expected to be operational by the end of 2016. Nineteen kilometers of underground lines with 12 underground stations are being constructed in this corridor.