Metro erects bridge over railway lines

Sep 10, 2010 - Age Correspondent |

New Delhi

The Central Secretariat – Badarpur corridor of the Delhi Metro will be operational by month-end. A bridge with a hundred metre-long span on this stretch at Okhla over the railway tracks is an engineering landmark as it has been constructed without hampering the rail traffic below. It is the longest span ever built by the DMRC.

The DMRC had to use this long span over the railway track as four rail lines pass below the bridge. The bridge, located between the Okhla and Jasola Metro stations, has a total length of 250 metres and is divided into three spans, Delhi Metro spokesperson Anuj Dayal said. The middle span is 100 metres, the other two measure 75 metres each.
The Delhi Metro employed the “Balanced Cantilever Construction methodology (BCLC)” for its construction so that the rail traffic below is not hampered. This technique employs the use of a bridge builder that constructs the bridge segment by segment at a time.
This bridge has been built using M-60 grade concrete and about 130 workers were engaged in the construction on a daily basis.
Earlier, the Delhi Metro had constructed a bridge over the railway lines near Pragati Maidan, where the length of the main span was 93 metres.

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