A CASE HISTORY OF EXPANSIVE CLAYSTONE DAMAGE-DISCUSSION

The characteristics of expansive materials are listed, and comments are made regarding the effects of expansive materials on structures, preventive measures, the causes of swelling, and the shearing of water and sewer laterals. One preventive measure is to avoid mass grading i.e. design structures to fit the natural ground contours. If, however, mass grading is a requisite, it should be done by using nonexpansive fill and by properly keying into the adjacent hillside. Swelling associated with moisture changes is attributed to three moisture sources: lawn and plant irrigation, rainwater runoff, and broken water and sewer laterals. Proper drainage and durther measures (specified) must be initiated to reduce these moisture changes. Flexible pipes could be located in creep areas and pipes could be placed above the ground or be backfilled with an impervious clay rather than the traditional sand backfill. If the magnitude of pressure caused by swelling can be bracketed, it may be possible to increase the foundation bearing pressure to resist these uplifting pressures.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Discussers:
  • Reed, P M
• Publication Date: 1976-6

Media Info

• Pagination: p. 657-658
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 102
  • Issue Number: GT6
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Backfilling; Bearing capacity; Case studies; Drainage; Expansive clays; Fills; Foundations; Grading (Earthwork); Irrigation; Loss and damage; Moisture content; Pipe; Runoff; Sewers; Shear stress; Structures; Swelling soils
• Uncontrolled Terms: Grading; Shearing
• Old TRIS Terms: Backfills
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00141313
• Record Type: Publication
• Report/Paper Numbers: ASCE #11590 Proceeding
• Files: TRIS
• Created Date: Oct 26 1976 12:00AM