Progress report on helical pipe culverts during backfilling and in service

This paper reports on progress with a test program to examine the behaviour of steel helical culverts during backfilling and in-service in low cover application. In-service durability issues are also discussed. It examines the hypothesis that under normal operating conditions, significant bending exists around the crown of the culvert in low cover applications. Four culverts were instrumented. The results of the work to date are:- a) For small diameter culverts, the height of cover cannot be reduced due to distortion and permanent set of the culvert to live load; b) The backfilling operation causes distortion of the culvert. This distortion causes bending of the culvert that results in extreme fibre strain at or near yield of the steel; c) Live loads with low cover result in bending of the culvert; d) Design codes do not adequately predict these bending effects. It is considered that design codes need review and that steel culverts should not be installed in permanent water or subject to partial/full submergence for long periods. (a) For the covering entry of this conference, please see ITRD abstract no. E211649.

  • Authors:
  • Publication Date: 2004


  • English

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Filing Info

  • Accession Number: 01011284
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Dec 19 2005 2:59PM