A review of laboratory testing for bridge foundation design is presented with discussion of application and errors. Testing is primarily composed of classification, shear strength, and consolidation tests. The AASHO and Unified Soil Classification systems are the most widely used systems. Mechanical analysis, hydrometer analysis, and the Atterberg limits are the tests required for classification. Classification test results are insufficient for use as design values. Shear strength testing is done by direct shear, unconfined compression, vane shear, triaxial, and plane strain tests. Triaxial testing with back pressure allows test variations which simulate actual field conditions. Plane strain and residual shear tests can simulate field embankment conditions effectively. Laboratory vane shear devices can be used for testing of samples in sampling tubes. The standard consolidation test yields a good estimate of settlement. The controlled gradient and controlled-rate-of-strain consolidation methods, both of which use back pressure, give improved results, decrease testing time and make data reduction easier.

  • Corporate Authors:

    University of Arkansas, Fayetteville

    Department of Civil Engineering, 4190 Bell Engineering Center
    Fayetteville, AR  United States  72701

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Arkansas State Highway Department

    Division of Planning and Research, P.O. Box 2261
    Little Rock, AR  United States  72203
  • Authors:
    • Thornton, S I
    • Welch, R C
  • Publication Date: 1975-10

Media Info

  • Pagination: 152 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133174
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Research Proj No. 39Intrm Rpt., FH-WA/RD-76-S0446
  • Created Date: Jun 23 1976 12:00AM