On January 9, a crew from IL&FS Engineering commissioned their first launching gantry crane at Nayandahalli to begin launching precast segments for building the viaduct of Bangalore Metro Purple Line’s 8.814 km western extension to Challeghatta. This milestone was accomplished by IL&FS 21 months after they won a contract to build the 3.945 km Reach 2A package of the Bangalore Metro’s 72 km Phase 2 project between Mysore Road and Pattanagere.
The western extension of the line is being built in 2 parts by IL&FS (Reach 2A) and Soma Enterprises (Reach 2B) and consists of 7 new stations at Nayandahalli, Rajarajeshwari Nagar, Bangalore University, Pattanagere, Mailasandra, Kengeri and Chellagatta (recently added). The extension’s first pier started to take shape at Nayandahalli in May 2016.
Each segment weighs 40 tons and usually 10 segments are required to build one span between two adjacent piers. Here’s my go-to video to demonstrate how the Launching Gantry works its magic with precast segments to build modern segmental viaducts and bridges:
Going forward, I’ll be posting one-off construction images on Twitter so do follow or check out my handle.
For more updates, check out the Bangalore section of The Metro Rail Guy!