On this past Friday night, workers from NCC commissioned their 3rd launching gantry in front of the Nandi Toyota dealership at Thalaghattapura for building the viaduct of Bangalore Metro’s Green Line’s 6.29 km southern extension to Anjanapura Township. This development on Reach 4B of the project comes about 3 months after the 2nd launching gantry was commissioned at Yelachenahalli.
Reach 4B includes 5 new stations at Anjanapura Cross Road, Krishna Leela Park, Vajrahalli, Thalaghattapura & Anjanapura Township on Kanakapura Road, and is expected to become operational in late 2019. Here’s a map displaying the direction of all 3 launching gantry cranes in orange:
LG-1 is travelling south from the Krishna Leela Park Station, LG-2 is travelling south from the existing Reach-4A’s viaduct in Yelachenahalli, and LG-3 has now started erecting segments & will shortly start making its way north from Thalaghattapura Station.
Images shot on May 1 while LG-3 was being set up:
Segments being launched on this Saturday morning:
Each segment weighs 40 tons and usually 10-12 segments are required to build one span between two adjacent piers. For this section, BMRCL’s May 2017 newsletter mentions that NCC had completed casting 621 out of 1916 segments at their yard in Thataguni Village by the end of April.
Here’s my go-to video to demonstrate how a launching gantry works its magic with precast segments to build modern segmental viaducts and bridges:
For more updates, check out the Bangalore section of The Metro Rail Guy!