Mumbai-Ahmedabad HSR develops casting yards at 25 zones

04 Jan 2022 CW Team

The Mumbai-Ahmedabad High-Speed Rail corridor (MAHSR) project is being executed by the National High-Speed Rail Corporation Limited (NHSRCL). It has developed casting yards at 25 locations adjacent to the high-speed metro site.

From 25 casting yards, 17 are full-span casting yards, and eight are segmental casting yards. Each casting yard spread across 16-93 acres of land as required near the High-Speed Rail corridor.

As per NHSRCL, the total area of the casting yards is approximately 1,000 acres.

It has adopted a full-span launching method and segmental method. The full-span girders are more preferential than segmental girders since their erection is seven times faster.

Full-span girders are not feasible at some locations due to road crossings, pipelines, canals, rivers and curvature radii of less than 6,000 m. Therefore, NHSRCL uses segmental girders.

The full-span girder of 40 m is cast in one go, and segmental girders are cast in small pieces of lengths between 1.75-2.5 m. The small pieces are attached using prestressing cables to make 35-60 m spans.

NHSRCL has recently developed a casting yard in village Vaktana, Surat, on 22-acre land.

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