Smriti Kak Ramachandran
Railway bridge over the Yamuna to run Delhi Metro completed in 26 months
NEW DELHI: Keeping up its reputation of beating deadlines, the Delhi Metro Rail Corporation has completed construction work on its brand new railway bridge across the Yamuna in a record time of 26 months. The work on the 698.8-metre bridge started in October 2005 as the first project under the ongoing second phase of metro construction.
Requiring intense planning and engineering skills, the bridge -- which will shoulder a weight of about 3,000 tonnes -- took a workforce of nearly 200 men working 24 hours a day to complete the job in record time.
Working in the area required special manpower and infrastructure. As the pillars of the bridge were to be erected on the soft soil of the Yamuna riverbed that is flooded during the rains, the DMRC had to first dig wells in the area to offer support.
“Seventeen wells measuring 35.5 metres in depth were first constructed and these were then filled with concrete to offer a foundation for the pillars,” explained a DMRC official on Wednesday.
Construction at the site was a challenge in terms of logistics. “Not only was it difficult to work in the given conditions, it was also difficult to ferry crew and resources,” said the official.
The bridge, which will be ready for trial runs by the end of this year, will connect Indraprastha metro station to the new Yamuna Bank station.
“There will be an interchange station at Yamuna Bank, from where two lines will diverge towards Ghaziabad and Noida. The line towards Noida will have stations at the Games Village, Mayur Vihar Phase-I, Mayur Vihar Phase-I Extension, New Ashok Nagar and then on to Noida.
The line towards Ghaziabad will have stations at Anand Vihar, Kaushambi and Vaishali,” said DMRC Chief Public Relations Officer Anuj Dayal.
Built at a cost of Rs.39.18 crore, the bridge took 7,500 metric tonnes of cement and 3,000 metric tonnes of reinforcement steel and structural steel to build. It has a total of 224 segments pre-cast at Mundka and a span length of 46.2 metres as against the usual 22-25 metres.
To ensure that the floodwaters do not flow from the riverbed to the Metro Depot, a special bund has been created with the help of boulders. With civil work over, the DMRC is now focusing on providing lights, laying of tracks and signalling.
“This bridge is the most crucial portion of the second phase of construction. It is this bridge that will take the metro to Noida by June 2009 and to Ghaziabad by September 2010,” said Mr. Dayal.