Delhi Metro To Construct Record Number Of Underground Corridors In Phase 3
The total length of the underground corridors in Delhi Metro’s proposed Phase 3 will be almost equivalent to the total underground sections built so far by DMRC in both Phase 1 and 2, making it one of the most challenging construction phases for the organization.
While Delhi Metro now has a total of 31 underground stations, Phase 3 alone will have 28 underground Metro stations. The total length of the underground corridor presently is 48.06 kilometres and Phase 3 alone will have underground corridors of 41.044 kilometres.
The first phase of Delhi Metro’s construction had 13.17 kilometres of underground Metro lines while, the second phase had 34.89 kilometres. In Phase 3, about 40 percent (39.83 percent) of the total proposed Metro network will be underground.
The decision to construct more underground corridors was taken this time to ensure that the construction work causes minimum inconvenience to the people. By constructing so many underground stretches, DMRC will also be able to avoid causing any damage to the existing infrastructure such as flyovers and roads.
The longest underground section of Phase 3 will be from IGI Airport (Domestic) to Kalkaji on the Janakpuri West – Kalindi Kunj corridor which will be 17.288 kilometres long. The Mukundpur – Yamuna Vihar corridor will have underground lines of 14.386 kilometres and the Central Secretariat – Kashmere Gate corridor will have a total of 9.370 kilometres of underground lines.
For the first time in the history of Delhi Metro’s construction, three different tunneling stretches in Phase 3 will pass below existing underground Metro stretches in the city. These four underground stretches are:
1. Underground stretch from Sarojini Nagar to INA on the Mukundpur – Yamuna Vihar corridor will pass below the underground section of the Jahangirpuri – HUDA City Centre line at INA.
2. Underground stretch From Indira Gandhi Domestic Airport (T2) to Kalkaji on the Janak Puri West – Botanical Garden corridor will pass below the underground section of the Airport Express Link near the Indira Gandhi Domestic Airport and Jahangirpuri – HUDA City Centre line near Hauz Khas. .
3. Underground stretch from Mandi House to ITO on the Central Secretariat – Kashmere Gate Corridor will pass below the underground section of the NOIDA – Dwarka corridor at Mandi House.
As per present plans, most of the underground work will be done through Tunnel Boring Machines (TBMs), New Austrian Tunneling Method (NATM) and stations will be constructed with the help of the cut and cover technology.
Presently, initial tests such as geo technical surveys, soil surveys, utility tests are being conducted by specialized agencies on all the above mentioned corridors. Tenders have been finalized for the construction of the Mandi House and Janpath stations on the Central Secretariat – Kashmere Gate corridor. Details of underground stretches (in a nutshell):
||Phase 3 Corridors
||Underground length (in kms.)
||Names of underground stations
||Mukundpur – Yamuna Vihar
||Azadpur, Bhikaji Cama Place, Sarojini Nagar, INA, South Extn., Lajpat Nagar, Srinivaspuri, Ashram, Hazrat Nizamuddin.
||Janakpuri West – Kalindi Kunj
||Palam, IGD Airport, Vasant Vihar, Munirka, R.K Puram, IIT, Hauz Khas, Panchsheel Park, Chirag Delhi, GK Enclave, Nehru Place, Kalkaji.
||Central Secretariat -Kashmere Gate
||Central Secretariat, Janpath, Mandi House, ITO, Delhi Gate, Jama Masjid, Lal Quila, Kashmere Gate
||Underground length (in kms.)