Congested Areas Along Mukundpur-Shiv Vihar Corridor Pose A Challenge
New Delhi: With 14 sharp curves in a span of 13km, the Hazrat Nizamuddin to Shiv Vihar section of the Mukundpur-Shiv Vihar corridor is expected to be unique in Delhi Metro’s network. Curves having less than 300m radius are considered to be ‘sharp curves’ in urban rail construction.
In 2010, Delhi Metro constructed the sharpest broad gauge curve on its elevated section in Gurgaon near IFFCO Chowk with a radius of 282.05 meters between pier numbers 125 to 137 in Phase II. “DMRC will be constructing a record number of sharp curves in phase III. It will be on the standard gauge metro corridor from Hazrat Nizamuddin to Shiv Vihar.” said Anuj Dayal, the Delhi Metro Rail Corporation spokesman.
Such sharp curves would entail precision planning and construction by Delhi Metro. “Cantilever piers and portals or supports would have to be constructed at appropriate places to provide smooth transition for the curves to take care of the shifted alignment due to the curvature,” added the Delhi Metro official.
The reason behind Delhi Metro constructing such sharp curves is the congested nature of the localities the line will pass through on the Mukundpur to Shiv Vihar corridor. “Because of the uneven twists and turns in this 25km elevated corridor, Delhi Metro is being forced to construct 14 curves on this stretch that pass through congested areas like Trilokpuri, Kalyanwas, Vinod Nagar, I P Extension, Anand Vihar, Karkarduma, Welcome, Seelampur, Jaffrabad and Maujpur,” said the Delhi Metro spokesman.
Building sharp curves requires a great deal of engineering skills and several factors have to be kept in mind while designing special segments or spans at the concerned turn or juncture, said DMRC engineers. “DMRC has to form especially dedicated beds in its casting yard for casting of special segments. The segments are then constructed according to the already defined ‘radius of curvature’ and then put on the viaduct,” added Dayal.
The Mukundpur to Shiv Vihar corridor is 59km long and will cover 40 metro stations. It is one of the two new corridors being constructed for Phase III.
Source: Times Of India