Delhi Metro Rail Corporation (DMRC) will soon start construction work on the underground section of its Aerocity-Tughlaqabad Silver Line corridor of Metro Phase 4. The Silver Line, connecting Tughlakabad to Aerocity, will pass under 17 pairs of active railway tracks. The new Metro line will be around 23 metres below the rail level.
Tughlakabad Metro station will serve as an interchange station on the line, which will be ready by 2025. The Tughlakabad interchange station will be on level 4, which will be accessible via lifts, stairs and escalators to both Violet and Silver Line stations. Tughlakabad will be the second such interchange station on the Delhi Metro, where there will be an underground facility.
The length of the railway tracks crossed by the upcoming Delhi Metro line will be about 110 metres, said a Metro official. The railway lines on this stretch are part of the Delhi-Palwal railway route a fairly busy corridor of the railway network within Delhi.
“A gap of 15 metres shall be maintained between the railway tracks and the Metro tunnel below. Tunnel Boring Machines (TBMs) will be pressed into service to carry out the tunnelling in this section. This will be a major engineering challenge since no disruption will be caused to the movement of trains on this section while carrying out the construction work,” said Anuj Dayal, executive director, corporate communication, DMRC.
DMRC officials said they are currently seeking approvals from the Indian Railways, adding that the construction of the priority corridor is expected to be completed by 2025.