400 tonne steel girder placed atop Luvkush square flyover

Indore: A 65-meter-long, 400 tonne steel bowstring girder (bowstring arch) was placed atop Luvkush square double-decker flyover at a height of 23 meters.The bowstring girder is a part of the new flyover that would pass over the existing Metro line and MR-10 Super Corridor flyover.Posed with these multi-level constraints, engineers were forced to discard traditional ground-based launching and assemble the massive girder directly in the air. After being assembled on a temporary composite girder span, the structure was pulled into its final position using three powerful winch machines. Two machines were used for pulling, while one acted as a rear brake to ensure controlled movement. Traffic at the busy Luvkush square was entirely halted for 12 hours to ensure a zero-risk environment during the five-hour launching phase.To lift the massive steel angles and assembly components to the 23-meter height, two specialised cranes with a combined capacity of 900 tonnes were deployed.IDA CEO Parikshit Zade confirmed that the first girder was now securely in place. Over the next fortnight, this 400-tonne structure will undergo a ‘jack push' process which involves using hydraulic jacks to gradually shift the girder laterally to the second arm of the flyover.Assembly for the second bowstring girder is scheduled to begin next week.GFXNew Flyover Specifications| Total Length | 1,452 Meters || Segment Width | 25 Meters || Single Segment Weight | 120 Tons || Total Segments Placed | 247 Segments || Combined Weight of Segments | 30,000 Tons (Cement & Steel) |The ‘Jack Push' ProcessIn next fortnight, hydraulic jacks will be used to gradually shift this 400-tonne girder laterally to the second arm of the flyover