Chenab Railway Bridge

Chenab Railway Bridge Technology :-

      The bridge uses a two-rib steel arch design with an open spandrel construction. Open-spandrel implies that the rail deck sits on vertical supports rising from the arch instead of being continuous. Weathering steel was used for the construction of the bridge, which is corrosion resistant and allows for temperature variation between -20 degrees Celsius to 45 degrees Celsius.
         Each segment of the bridge weighs 34 MT and was erected using the help of the world's tallest cable crane with a 127m high pylon, Afcons said. It is taller than the Qutub Minar.
     The Chenab Rail Bridge:
     BIt is designed to bear earthquake forces of the highest intensity zone-V in India. To ensure that the structure is secure, Phased Array Ultrasonic Testing machines were used to test the welds, a first in Indian Railways. Interestingly, the bridge required roughly 5,84,000 km of welding to join different parts — about the same distance between Jammu Tawi and New Delhi.
   Throughout the bridge, structural health monitoring (SHM) systems have been placed. 
     More than 100 sensors have been installed that monitor wind parameters, environmental conditions, structural responses such as vibration and load, and more. 
   These sensors constantly send data to alert mechanisms.
If any of the values are found to be beyond the safety parameters, it triggers a red signal to halt train operations and sounds alarms to alert station masters and control rooms. The health monitoring of the bridge is being handled by Tranz Rail Solutions along with Strainstall, part of the James Fisher group.
MJF Lion ER YK Sharma 

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