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Press Release - PM INAUGURATES COUNTRY’S LONGEST RAIL BRIDGE CONSTRUCTED BY RVNL

Rail Vikas Nigam Ltd received another feather on its cap when the Prime Minister of India inaugurated the International Container Transhipment Terminal (ICTT) and the railway line connecting Idapalli to Vallarpadam where the ICTT has been constructed. The line is actually a railway bridge on the backwaters of Kerala, connecting Idapalli to the ICTT. Earlier, in September 2010 this bridge was adjudged the Outstanding Pre-stressed Concrete Structure of the year and the coveted Papareddy Memorial Silver Jubilee Award was presented to Mr. Satish Agnihotri, MD, RVNL by the Indian Concrete Institute. For providing rail connectivity from Idapalli Railway Station to the ICTT, the proposed alignment had to cut across densely populated areas and backwaters. In order to reduce the land acquisition in populated areas, as also to go across the backwaters, it was decided to take an elevated route over these areas. This led to the conceptualization of a 4.6 Km long elevated structure. The work was to be completed in a short period as the rail connectivity to the container terminal was a time bound exercise being monitored by Prime Minister’s office. This work was started in May 2007 and completed in September 2009 at a total cost of Rs. 175 Crore including escalation. This is the longest bridge constructed on Indian Railways and was completed in a record time of 2 years and 4 ½ months. The construction contractor for the bridge was M/s AFCONS. Design & construction of the bridge posed unique challenges: Some of the landmark achievements during the construction were – a. Pumping concrete over a distance of 1.8 km. by use of intermediate concrete pumps b. Launching of 231 PSC girders of 250T each in just 400 days c. Launching of girders on curve alignment: Launching of girders was done on the curved alignment which is an extremely difficult task. The alignment of the elevated structure consisted of 2 degree, 2.5 degree & 3 degree curves. d. Specially designed Launching girder • Launching Girder was specially designed to launch the girders on curved alignment. • A global enquiry was made for designing the girder which can move longitudinally and laterally. • Based on this, girder was designed by Malaysian firm NRS-Asia and the fabrication of the girder was done in China. • After fabrication, the girder was shifted to Cochin and was assembled at site. • The girder is self propelled and can move laterally in loaded condition. e. Kerb making of 14 km: • This was done with help of specially procured kerb maker which does kerb making with moving shutters. An average progress of 500 m per day was achieved. f. Accident and Injury free execution • Even with such a massive exercise undertaken in a short span the whole work was completed without any injury or accident.
 

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