By Shri Pradeep Ahirkar, ED/Track & Design
Publication: Journal of Civil Engineering and Architecture, May 2025 Issue
Abstract: The MAHSR (Mumbai-Ahmedabad High Speed Railway) corridor showcased the country’s dream of first HSR (high speed railway) project and will be a major milestone towards country’s infrastructure development. Globally, more than 20 countries are already running HSR commercially, Japan has been among the lead players with Shinkansen technology. It has impeccable record of zero accident involving passenger fatalities in last 60 years of its existence long with excellent punctuality records. Shinkansen technology has been chosen for HSR project on account of its technical supremacy. As far as construction of super-structure girders is considered, there are many methods available i.e. SBS (segment by segment girder), FSLM (full span launching method), steel girder, I-girder, U-girder, with FSLM and SBS being the prominent ones. In FSLM Girder, the casting as well as erection is done as a single span of 35/40 m while in case of SBS method, the casting is done in 2/2.5 m segments and erection is done segment by segment. Most of the girder launching work in viaduct construction in HSR projects worldwide has been done using segment by segment launching method. There was a critical need to reduce the higher time taken by this method for launching of span along with quality improvements using technological innovations. Considering this aspect the launching of girder was planned using FSLM as the best solution for the advancement. Presently, only few countries like China, Taiwan utilized this technology for HSR projects in a limited way.
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