NCRTC has successfully installed a 200-tonne steel span, with 4 girders on the Barapullah flyover to connect Sarai Kale Khan station with the upcoming Jangpura stabling yard on the Delhi-Ghaziabad-Meerut Namo Bharat Corridor. The installation was carefully planned by NCRTC and executed with close coordination of the administration, Public Works Department, and Delhi Traffic Police, ensuring safe and efficient completion.
About Jangpura stabling yard
The Jangpura stabling yard, located close to Sarai Kale Khan station, is being developed for stabling Namo Bharat trains. The viaduct is under construction to provide this connection. For the construction of viaduct in the elevated section of the Namo Bharat corridor, NCRTC usually erects pillars at an average distance of 34 meters. However, in some complex areas where the corridor crosses rivers, bridges, rail crossings, metro corridors, expressways or other such existing structures, it is not practically possible to maintain this distance between pillars. In such areas, special steel spans are used to connect the pillars for the viaduct.
At this location, a drain is flowing, close to which Barapullah flyover is located and Namo Bharat Corridor is crossing both the drain and Barapullah flyover at the same place. To overcome these constraints, this special steel span with 4 girders has been installed to cross over the Barapullah flyover.
About the Steel Span
The length of these steel girders is 40 meters each and the weight is 50 tons each. These 4 steel girders were installed using a two-stage lifting method involving three high-capacity cranes. To ensure minimal disruption to traffic, this challenging task was carried out during the night.
Due to the drain flowing underneath and the Barapullah flyover above it, the steel spans had to be lifted by a crane and placed directly on the designated pillars. To make it possible, the steel girders were lifted from the ground one by one and first placed on the road built on the Barapullah flyover with the help of two cranes on one side of the Barapullah flyover. Then, by lifting girders using two cranes placed on both the sides of the flyover, the girders were installed on the designated pillars one by one.
Additionally, as a safety measure, during this work, alternate power supply arrangements were made to the areas being catered by 220 kV high-tension line passing right above this section in coordination with Delhi Transco Limited. Despite the complexities of the site, NCRTC completed the task while adhering to all safety and engineering standards.
These special steel spans are massive structures, consisting of beams made of structural steel. NCRTC, first manufactures the different segments of structural steel in the factory and then using trailers, brings them to the site during the night to avoid any traffic problems. These parts are then assembled at the site by systematically joining together with the help of a special process. The shape and structure of these steel spans are specially designed to suit all the requirements of construction, installation and usage.
Further Updates
The 4.5 km Delhi section between Sarai Kale Khan and New Ashok Nagar is gearing up for operations, trial runs on this stretch commenced on April 13.
Currently, Namo Bharat trains are operational on 11 stations across the 55 km stretch between New Ashok Nagar and Meerut South. The entire corridor is targeted to be operational by 2025.
