THE SIGNIFICANCE OF SOIL CONDITIONS AND TRENCH PREPARATION IN RELATION TO PIPELINE PERFORMANCE

The influence is outlined of such factors as the bedding around a pipe on the performance of rigid and flexible pipelines, and guidelines are given on trench preparation and the selection of embedment materials. Also discussed is the pipeline materials, and the type of corrosion protection which is adequate and economical. The supporting strength of rigid conduits can be determined readily in the laboratory. It is shown that for a specific pipe diameter and factor of safety the ability to support vertical load is directly proportional to the load factor. Rigid and flexible conduits are discussed, and comments are made on soil surveys, compaction of soil, anchor blocks and area of anchorage. Designing for earthquakes and subsidence, as well as designing for pipes in unstable ground conditions are also discussed. It is noted that where pipes are laid underground in poor soil conditions (as opposed to unstable ground) then, two choices are abailable. If a certain class of pipe embedment has been specified and it is found that the natural soil on the trench sides will not support the compacted of the trench walls with that of the pipe sorround. Frequently calculations may indicate that adoption of the appropriate class of embedment compacted to a higher value of modified Proctor Density can meet design specification.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00174653
• Corporate Authors:

  Foundation Publications Limited

  7 Ongar Road
  Brentwood CM15 9AU, Essex,   England 
• Authors:
  • Smith, T R
• Publication Date: 1976-4

Media Info

• Features: Figures; Photos;
• Pagination: p. 33-38
• Serial:
  • GROUND ENGINEERING
  • Volume: 9
  • Issue Number: 3
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0017-4653

Subject/Index Terms

• TRT Terms: Anchorages; Bedding; Corrosion protection; Earthquakes; Geological surveying; Load factor; Loads; Pipelines; Safety factors; Settlement (Structures); Soil chemistry; Soil compaction; Soils; Subsidence (Geology); Thickness
• Uncontrolled Terms: Lateral strength; Soil conditions; Vertical loads
• Subject Areas: Geotechnology; Highways; Pipelines; Safety and Human Factors; Terminals and Facilities;

Filing Info

• Accession Number: 00141857
• Record Type: Publication
• Report/Paper Numbers: Analytic
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM