NEW DELHI (Metro Rail News): The imminent Silver Line, that will connect Tughlakabad to Aerocity as part of Delhi Metro’s Phase 4 expansion, will pass under 17 active railway tracks for which the Delhi Metro Rail Corporation (DMRC) has already got permissions from the Indian Railways. DMRC officials said that the number of tracks between Tughlakabad and Tughlakabad Railway Colony stations involved in the project is the highest. The officials also informed that this new metro line will be around 23 metres below the rail level.
“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.
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 which is also a busy corridor of the railway network in Delhi.
“Therefore, construction will have to be carried out without causing any disruption to the movement of trains. In order to ensure that the work is executed in a safe manner, adequate instrumentation will be done to monitor the railway tracks on a 24×7 basis. State of the art monitoring equipment such as inclinometers and tiltometers will also be used on this section,” a DMRC spokesperson said.
The Aerocity-Tughlakabad corridor will have four elevated and 11 underground stations. It will also include four interchange stations at Aerocity, Chattarpur, Saket and Tughlakabad, making it one of the most essential corridors of the DMRC network.
As part of the Delhi Metro Phase-4 expansion, 65.1km stretch is under construction that includes the Magenta Line extension from Janakpuri West to RK Ashram Marg (28.92km), Pink Line extension from Majlis Park to Maujpur (12.55km), and the imminent Silver Line from Tughalakabad to Aerocity (23.62km). The Silver Line will connect the Violet and Airport Lines from their respective ends.