DMRC completes tunnelling work


The Delhi Metro Rail Corporation (DMRC) on Wednesday completed tunnelling work on the under construction Delhi Cantonment–Naraina Vihar-Mayapuri stretch of the Majlis Park–Shiv Vihar corridor (Pink Line) under its Phase - III project.

The Tunnel Boring Machine (TBM) emerged at Mayapuri retrieval shaft site after making a 1.2 km long tunnel from Delhi Cant. The tunnelling on this stretch began on February 2, 2015. The maximum depth of the tunnel is 22 meters below the earth’s surface. “This is another engineering landmark for DMRC as the TBM was dragged through the Naraina Vihar station instead of its retrieval after installing 803 metres (578 rings) due to paucity of space for creating a shaft on the ground. The TBM was dragged about 210 meters and took about one month and was carried out by M/s J. Kumar-CRTG,” the DMRC said in a statement. Generally, TBMs are retrieved through custom-made retrieval shafts and then re-inserted through launching shafts in the new location. But, such conventional engineering would have involved construction of separate retrieval and launching shafts, which would have required more land in this case.

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Printable version | Dec 7, 2019 5:38:56 AM |

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