BEDDING AND BACKFILLING OF BURIED PIPE CONDUITS

Rigid pipe sewer and culvert installations are frequently weakened by failure to install the pipe in a high-quality bedding which will laterally distribute the upward reaction on the bottom of the pipe. If the reaction is caused to be concentrated, the bending moment in the pipe wall is seriously increased, and failure in the form of cracking or spalling may result. Another construction feature which may lead to difficulty is failure to place the sidefill soil in initimate contact with the sides of the pipe. Every pound of active lateral pressure which can be brought to bear against the sides of the pipe increases its ability to carry vertical load practically one for one. The writer indicates that a pipe on a high-quality bedding with favorable conditions for the development of active lateral pressure on the pipe sides will carry approximately 2-1/2 times as much load as the same pipe on a poor-quality bedding with no opportunity for side pressure to develop.

• Supplemental Notes:
  • A symposium presented at the 79th Annual Meeting of the American Society for Testing and Materials, Chicago, Illinois, 27 June-2 July, 1976.
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Spangler, M G
• Publication Date: 1977-9

Media Info

• Features: Figures; References;
• Pagination: p. 41-47
• Serial:
  • ASTM Special Technical Publications
  • Issue Number: 630
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Backfilling; Bending moments; Conduits; Fracture mechanics; Loads; Pipe; Pipe culverts; Pipe laying; Sewers; Soil structure interaction; Spalling; Underground structures
• Uncontrolled Terms: Lateral pressure
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00164867
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 8 1977 12:00AM