Mumbai-Ahmedabad bullet train project: First steel bridge launched in Maharashtra

First steel bridge in Maharashtra for bullet train project (Image: NHSRCL)

Steel bridge fabricated in Tamil Nadu

One of the key features of the project is that the bridge was fabricated at a workshop in Trichy, Tamil Nadu, around 1,300 km away from its final installation site in Maharashtra.

According to NHSRCL, the completed components were transported by trailers to Maharashtra and then assembled at the site. The fabrication work included precision cutting, drilling, welding and painting according to the approved designs and specifications.

Mumbai-Ahmedabad bullet train project: First steel bridge launched in Maharashtra

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Each batch of steel used in production underwent Ultrasonic Testing (UT). The welders and supervisors involved in the work were also certified by international welding experts.

Key details of the steel bridge

• Length: 100 metres
• Weight of main bridge: 1,405 tonnes
• Height: 14 metres
• Width: 14 metres
• Location: Dive-Anjur, Bhiwandi, Thane, Maharashtra
• Highway crossed: NH-3 (Nashik Highway)
• Fabrication location: Trichy, Tamil Nadu
• Steel bridges planned: 28
• Steel bridges completed: 16

First steel bridge in Maharashtra for bullet train project (Image: NHSRCL)

How was the steel bridge launched?

At the site, the 100-metre-long bridge was assembled on temporary trestles at a height of around 17.5 metres above the ground. The assembly used 22 skid arrangements and 54,076 Tor-Shear Type High Strength Bolts (TTHSB).

A C5 protective painting system and elastomeric bearings were also provided to improve the bridge’s durability and help control vibrations. Once the structure was ready, it was moved into its final position using an automatic mechanism.

The system included two hollow jacks, each with a capacity of 150 tonnes, along with pre-tensioned Macalloy Bars.

Work carried out during night traffic blocks

Since the bridge crosses the Nashik Highway, the launching operation was planned during night traffic blocks. This helped minimise disruption to highway commuters while the heavy steel structure was moved into position.