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<p>Constructing a railway bridge at 359&#xa0;m above the Chenab riverbed was one of the toughest phases in fulfilling India’s 100-year dream of running a train between Jammu and Srinagar. The major challenges involved were the height and dimensions of the bridge, steepness of slopes, harsh terrain, heterogeneity and anisotropy of the rock mass with closely spaced joints, presence of the river below the bridge, adverse climatic conditions, very high wind speeds and seismicity of the location. The design of such a bridge had continuously evolved, as per the rock mass conditions encountered during the excavation and the changing design parameters over time. The overall structure of the bridge, its type and location were probably the only constant parameters in the design and the dimensions of piers, and their location, type and dimensions of the foundations and all other elements of the bridge were kept flexible in the design to suit the geological and geotechnical conditions of the site. This paper emphasizes the importance of “<i>design as you go</i>” approach in civil engineering, especially for structures with large spatial extents. The deeper insights gained through 17&#xa0;years involvement of the author in planning, design and construction of the world’s highest railway bridge on river Chenab are discussed in this context.</p>

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Design as You Go: The Case Study of Chenab Railway Bridge

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Gali Madhavi Latha

摘要

Constructing a railway bridge at 359 m above the Chenab riverbed was one of the toughest phases in fulfilling India’s 100-year dream of running a train between Jammu and Srinagar. The major challenges involved were the height and dimensions of the bridge, steepness of slopes, harsh terrain, heterogeneity and anisotropy of the rock mass with closely spaced joints, presence of the river below the bridge, adverse climatic conditions, very high wind speeds and seismicity of the location. The design of such a bridge had continuously evolved, as per the rock mass conditions encountered during the excavation and the changing design parameters over time. The overall structure of the bridge, its type and location were probably the only constant parameters in the design and the dimensions of piers, and their location, type and dimensions of the foundations and all other elements of the bridge were kept flexible in the design to suit the geological and geotechnical conditions of the site. This paper emphasizes the importance of “design as you go” approach in civil engineering, especially for structures with large spatial extents. The deeper insights gained through 17 years involvement of the author in planning, design and construction of the world’s highest railway bridge on river Chenab are discussed in this context.