In the design of buried, non-pressurized (gravity flow) piping systems using flexible pipe such as that manufactured of polyvinylchloride (pvc), the resistance of the pipe to deflection is provided by a combination of the inherent stiffness of the pipe and the lateral support provided by the soil around the pipe. This article considers the Spangler formula, and its modification, for calculating deflection. Values of soil modulus of passive resistivity for four soil classes are tabulated, and for these soil types maximum long term deflections (per cent) of pvc pipe for a range of pipe dimension ratios, and densities, and height of fill are presented. (TRRL)

  • Corporate Authors:

    Ministry of the Environment

    Pollution Control Branch, 135 St Clair Avenue W, Suite 100
    Toronto, ONo,   Canada 
  • Authors:
    • Fielding, M B
  • Publication Date: 1978-5

Media Info

  • Features: References; Tables;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00310266
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: NRP S2045 Monograph
  • Files: ITRD, TRIS
  • Created Date: Oct 27 1980 12:00AM