IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

Validation of a shoring system made with a high density polyethylene pipe (HDPE) or metal section normally used for culverts or sewers

Abstract

Municipal employees have to descend into rather deep trenches to maintain sewers and water supply pipes or to make connections. Even though these excavations must be shored for worker protection, wall collapse results in the death of one to two workers on average every year. The tested shoring systems are often complicated and heavy to install, particularly when small trenches are involved, which is often the case in an urban environment. Municipalities want to be able to use high density polyethylene pipe or metal shapes for culverts as a means of bracing for short-term work where the tested systems cannot be installed.
This publication describes the evaluation of the capacity of these pipes and shapes to withstand earth pressure as well as the maximum depth at which they can be effective. The authors conclude that the proposed systems are a safe option for shoring the walls of small dimension excavations. The method is simple, rapid, economical and appreciated by the workers.

Additional Information

Type: Project
Number: 0099-1760
Status: Completed
Year of completion: 2003
Team:
  • André Lan (IRSST)
  • Denis LeBoeuf (Université Laval)
  • Omar Chaallal (École de technologie supérieure)
  • Renaud Daigle (IRSST)