Design Flexibility Meets Long-Term Solutions

Aluminized steel Type 2 (ALT2) corrugated steel pipe (CSP) can provide cost-effective and long-lasting solutions in stormwater detention and roadway culvert applications. This article summarizes a study that was conducted to evaluate the service life of CSP and highlights two case studies where CSP provided a good solution to a difficult project. An evaluation of an ALT2 CSP installation in Greene County, Illinois was conducted 50 years after the CSP was installed. The study examined the environmental conditions along with a trepan sample. There were three soil samples taken from various positions around the pipe, and a single water sample was taken from inside. The results from these samples, along with the overall condition of the pipe, were analyzed to determine the remaining projected service life of the CSP. Based on conservative pit penetration extrapolations from this study, the projected service life of 14 gage ALT2 CSP will exceed 100 years in this type of environment. In a recent project, a CSP detention system was proposed for the East Village project in Roswell, Georgia. After considering several detention options, the final design was a two-tiered, 144-inch-diameter, 10 gage, ALT2 CSP detention system. The top and bottom systems are offset to distribute the loading and to allow access risers to the bottom system. The lower system experiences less load pressure than a single system at the same depth. In a second example of the use of ALT2 CSP, a structurally deficient concrete box culvert on a major four-lane highway in Carroll County, Missouri was in need of repair and rehabilitation. ALT2 coated CSP was used to reline the existing culverts, saving material costs and reducing construction time over the removal and replacement of the box culverts.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos;
  • Pagination: pp 36-37
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01149305
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 27 2010 10:07PM