Vadodara: As construction of the 1.4km bridge on the Narmada for the Ahmedabad-Mumbai bullet train project is making swift progress, its well foundations are set to go as deep as the Qutub Minar is high. The bridge over the Narmada being built by NHSRCL, is the longest river bridge in Gujarat .
It is being built between the Surat and Bharuch bullet train stations. “The bridge is being built on well foundations, which is a type of deep foundation in rivers used to support heavy structures such as bridges. It consists of a hollow, cylindrical structure sunk into the ground to provide stability and load-bearing capacity,” NHSRCL managing director Vivek Kumar Gupta said.
Well foundations are one of the oldest and most effective foundation types for bridges over wide rivers. This method is often in deep and unstable riverbeds. “The Narmada HSR bridge will have 25 well foundations.
Five will be more than 70m deep and the deepest — from well cap top to founding level — will be 77.11m. The depth of the other foundations will be about 60m.
Four well foundations will surpass the inverted height of the Qutub Minar,’’ Gupta said..