Temporary Support and Freezing of Bridge Bearings During Balance Cantilever Construction for New Brahmaputra Bridge at Guwahati

In earlier days, the majority of superstructure of cantilever bridges used to be designed by considering fixity at support achieved through monolithic construction of pier and deck and by providing central hinge or suspended span at the tip of cantilever arms to make the structure determinate. However, due to distress of central hinge bearings over a period of time and excessive deflection due to creep at the cantilever tips observed in almost all bridges built on the then state of the art design philosophy, now-a-days most cantilever bridges are designed as continuous over supports by providing central bearings below the deck at pier location to make the structure determinate. This eliminates the problem of excessive deflection at cantilever tip and at the same time increases the service life of bridge. For the construction of such cantilever superstructure, precise design of construction systems is of utmost importance. In this context, the paper discusses the details of two such important construction systems i.e. temporary support for cantilever deck and temporary freezing arrangement for free bearing adopted during the construction of New Brahmaputra Bridge at Guwahati, Assam. The advancements in the field of bridge engineering have led to increase in the span length of cantilever arms. Due to increase in the span of cantilever arms, the dead load of the superstructure also increases for which high capacity temporary support and freezing arrangements need to be provided in comparison to the conventional system for smaller span cantilever arms. This paper also presents the progressive advancements on the development of construction systems to cater to the challenges thrown by construction of longer cantilever arms.

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  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Mehta, Rakesh K
    • Kulkarni, Sudeep
    • Heggade, V N
  • Publication Date: 2018

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 1-14
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01685560
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 13 2018 8:32AM