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The Mumbai-Ahmedabad high-speed rail corridor, India’s flagship bullet train project, has achieved a crucial construction milestone in Maharashtra with the successful launch of the first full span pre-stressed concrete (PSC) box girder. This pioneering 40-meter long girder was installed at Sakhare village, Dahanu, marking a transformative step in the ambitious infrastructure endeavor set to revolutionize intercity travel.
Key Highlights Of The Girder Launch
The full span PSC box girder is 40 meters in length and weighs approximately 970 metric tonnes, making it the heaviest of its kind in India’s construction sector.
It was cast as a single monolithic unit using 390 cubic meters of concrete and 42 metric tonnes of steel, ensuring immense strength and stability.
Deployment utilized the advanced Full Span Launching Gantry (FSLG) technology, enabling swift installation with minimal disruption.
Maharashtra’s section of the corridor spans 156 km with 135 km elevated viaduct planned using 2,575 such full span girders.
This technology improves construction speed up to 10 times compared to traditional segmental girder methods, propelling the project forward efficiently.
Technical And Strategic Significance
Each full span box girder is a self-contained structural element without construction joints, designed to ensure durability and minimize maintenance. As a critical component of the elevated rail corridor between Shilphata and the Gujarat border, these girders provide a robust foundation necessary to support high speeds of up to 320 km/h on the Mumbai-Ahmedabad route.
The use of indigenous heavy machinery like straddle carriers and launching gantries highlights India’s growing engineering capabilities in executing mega infrastructure projects of international standards.
Progress In Maharashtra And Beyond
The 156 km Maharashtra stretch notably comprises 135 km of elevated viaducts, 17 km of segmental girders, 2.3 km of steel bridges, three major stations, and seven mountain tunnels spreading over 6 km in total. The project has established 13 girder casting yards along the corridor, of which five are actively churning out these full-span girders.
The successful launch of the first girder in Maharashtra follows the completion of 319 km of viaduct construction in Gujarat using similar technology, showcasing seamless implementation across states.
Impact On India’s Transport Landscape
Once complete, the Mumbai-Ahmedabad bullet train will drastically cut travel time between the two major cities to under 2.5 hours—an unprecedented leap compared to current 7-8 hour journeys. This will enhance connectivity, boost economic activity, and modernize India’s transport infrastructure.
The accelerated pace enabled by full span box girder technology is vital to keeping the project on track for its targeted operational date, projected within the next few years.
Broader Infrastructure Modernization
This project symbolizes India’s commitment to cutting-edge engineering, sustainable urban development, and global-standard transportation solutions. It also fosters innovation, skill development, and “Make in India” initiatives through domestic manufacturing of critical components.
Future Steps
With ongoing girder launches, viaducts, tunnel boring, and station construction, the corridor’s progress is robust. Continued focus on safety, quality, and technical excellence ensures the corridor emerges as a blueprint for future high-speed rail projects across the country.
In conclusion, the launch of the first 40-meter PSC box girder in Maharashtra signifies a decisive moment in India’s bullet train journey. Combining advanced technology with indigenous craftsmanship, this milestone fuels optimism that India’s high-speed rail dream will soon become a lived reality.
Sources: National High Speed Rail Corporation Limited (NHSRCL), Indian Express, NDTV, Swarajya, PIB
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