A PROGRESSION OF IMPROVEMENTS IN SUSPENSION BRIDGE MAIN CABLE REHABILITATION TECHNIQUES

This paper surveys some procedures for improving the rehabilitation of the main cables of suspension bridges, and some recent improvements to these methods. Rehabilitation work aims to clean the outer surfaces of the main cable, coat as many of the individual cable wires as possible with a corrosion inhibitor, and restore the main cable's outer covering with a water-resistant barrier. The rehabilitation usually progresses along the cables though a series of linear and repetitive construction operations. The main tasks are: (1) footwalk construction; (2) removal of existing wire wrapping and cable cleaning; (3) repairing broken wires; (4) cable wedging and inspection; (5) cable oiling; (6) cable compaction; (7) red lead paste coating and wire wrapping; (8) cable coating; and (9) other cable rehabilitation work. Methods for improving the procedures for most of these tasks are described; such improvements continue to evolve. Many major suspension bridge crossings have had service lives of at least 75 years, and there are many unknowns about the condition of their main cables. Bridge service life can be extended dramatically by relatively minor maintenance investments like periodic main cable investigations and follow-up repairs when necessary. About ten such projects have been completed or are in progress in the USA. For the covering abstract see IRRD E104152.

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  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Publication Date: 1999

Language

  • English

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Filing Info

  • Accession Number: 00788351
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2841-5
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM