STRUCTURAL PERFORMANCE OF BURIED POLYVINYL CHLORIDE PIPES UNDER LARGE DISTRIBUTED LOAD

Two polyvinyl chloride (PVC) pipes of nominal diameters 457 and 914 mm (18 and 36 in.) were fully instrumented and loaded to failure at the Ohio University load frame facility site as part of a major field testing program of plastic pipes. Before load testing, each pipe was backfilled with crushed limestone material meeting the Ohio Department of Transportation no. 310 subbase specifications. Height of backfill soil over crown was 610 mm (24 in.) for the 457-mm (18-in.) diameter pipe and 305 mm (12 in.) for the 914-mm (36-in.) diameter pipe. A specially designed rotational linear variable differential transformer (LVDT) deflection measurement system was inserted into the pipe to monitor the cross-sectional deformation. During the incremental stages of backfilling and load testing, readings from the strain gages and the LVDT system were recorded by computerized data acquisition units. Test data were analyzed to establish load-deflection curves, bending moment and thrust responses, and failure modes of the buried PVC pipes. In addition, analytical results from modified Iowa formula and elastic solutions of J.Q. Burns and R.M. Richard were compared with the experimental results to evaluate general applicability of these analytical methods. The findings of this study indicated that the elastic solutions are valuable for analyzing flexible pipes buried in a homogeneous soil with loaded boundary more than one pipe diameter away.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 59-67
  • Monograph Title: Design and performance of underground pipe
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00715654
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jan 25 1996 12:00AM