First full-span box girder erected for Mumbai-A’bad rail corridor

Surat: To expedite the construction of viaduct for the 508km-long Mumbai-Ahmedabad High-Speed Rail Corridor (MAHSR), the National High Speed Rail Corporation (NHSRCL) erected the first 40m full span pre-stressed concrete (PSC) box girder, the heaviest box girder in the construction industry of India, in a casting yard in Navsari district on Thursday.
Weighing about 970MT and involving 390cubic metres of concrete, the girder comprising 42MT of steel, was cast in a single piece sans any construction joint on November 1, 2021. The precast girder was picked up from the stacking yard by a straddle carrier and moved to the predefined location from where it was lifted by bridge gantry for installation.
The technical procedure requires high level of precision and expertise, said officials, adding the precast girder was placed between Pier P11 and P12 at chainage 238 of MAHSR corridor.
Of the 508 kms, 352km of MAHSR lies in Gujarat and Dadar & Nagar Haveli, while the remaining 156km lies in Maharashtra. Civil contracts of 343km have already been awarded. L&T is the executing agency for 325km of length.