Last week, a crew from NCC Ltd. successfully placed the 1st girder for Nagpur Metro’s 19.658 km north-south line! This 24.3 m long pre-stressed girder along with 3 other girders weighing 55 tonnes each were placed between the upcoming Khapri and New Airport stations where the line will primarily run at-grade for 4.5 km barring 3 locations where it’ll run over local roads and the Container Corporation of India (CONCOR)’s railway siding line.
These particular girders were placed for the CONCOR siding section whose design was given a final approval by the Airports Authority of India (AAI) in October 2015.
Recent satellite imagery of the location:
The first of the lot was cast in April. Details from NMRCL:
Length of I- Girder is 24.3 m, bottom width is 0.8m and top width is 0.5m and Height is 1.7m with web thickness 0.35m. For Girders M-45 grade of concrete and 3.401 MT Fe 500D reinforcement is required.
3 Nos. of cables are provided for stressing purpose. Bottom and Middle cables contains 19 Nos. of 15.2 mm dia strands and Top cable contains 12 Nos. of 15.2 mm dia strands. Stressing will be done in two stages. First stage stressing will be done after7 days & Second after 28 days of casting of concrete.
The rest of the elevated line north of the Airport will consist of precast segments. The 1st of them was cast in May and is expected to be launched to form the line’s viaduct on Wardha Road towards the end of this month or in September.
For more updates, check out the Nagpur section of The Metro Rail Guy!