The first base slab of the Mumbai underground Bullet Train Station at Bandra Kurla Complex has been cast at a remarkable 32 meters depth. This 3.5-meter-deep slab, part of the Mumbai-Ahmedabad HSR project, highlights advanced construction techniques, temperature-controlled concrete, and sustainable measures, marking a major milestone for India’s high-speed rail.
Bottom-Up Construction Method:
The station employs the bottom-up construction method, where work begins from the foundation and progresses upwards. This first base slab is 3.5 meters deep, spans 30 meters in length and 20 meters in width, and is one of the 69 slabs planned to form the station’s foundation.
Image Credit (representational): NHSRCL
The slab incorporates impressive engineering specifications:
- Reinforcement Steel: 681 MT of high-grade steel
- Rebar Couplers: 6,200 units
- Concrete: 2,254 cubic meters of M60 grade concrete
- Aggregates: 4,283 MT used
Concrete pouring was temperature-controlled, supported by in-situ ice and chiller plants, ensuring a pouring temperature below 25°C. Two batching plants of 120 m³ each facilitated the concrete supply, and waterproofing measures were meticulously implemented before casting.
Situated in the Bandra Kurla Complex, the station will feature:
- Three Levels: Platform, concourse, and service floor, with the platform at a 24-meter depth.
- Six Platforms: Each 415 meters long, accommodating 16-coach trains.
- Connectivity: Seamless integration with Metro Line 2B and nearby road networks via two dedicated entry/exit points.
- Passenger Amenities: Spacious concourse areas and provisions for natural lighting through skylights.
This station symbolizes a blend of modern engineering and passenger-centric design, catering to India’s vision of high-speed rail connectivity.
Image Credit (representational): NHSRCL
Conclusion:
The successful casting of the first base slab for Mumbai’s underground Bullet Train Station showcases India’s advanced engineering capabilities. As the deepest structure on the Mumbai-Ahmedabad HSR corridor, it sets the stage for innovative urban mobility, marking a transformative step in India’s railway infrastructure development.
Source: NHSRCL – Press Release | Featured Image Credit: NHSRCL
