This report deals with laboratory testing of clay specimens under repeated loads. The purpose of these tests is to investigate the influence of dynamic traffic loads on sub-grades consisting of cohesive soils. The first part of the report gives a survey of the literature regarding repeated load tests on soils. The results obtained so far by the various investigators show that the response of clay to repeated loads includes two main components; deformability and strength. The experimental work reported deals with triaxial testing of undisturbed clay specimens from fossegrenda in Trondheim. The clay specimens were tested in a triaxial cell designed and built for these special tests. During the repeated load tests stresses and the lateral and the axial deformations of the clay specimens were recorded. The test programme included two types of tests: the first was a single load, undrained triaxial test, with different cell pressures. The second was an undrained triaxial test with repeated axial loads which were pulsed with a sinusoidal variation at frequencies from 0,01 to 10 hz. The main aim of this investigation has been to determine the failure conditions and the deformation properties of a clay subgrade soil. Although the data obtained from the testing of the samples of the fossegrenda clay vary considerably, several important conclusions may be drawn on the basis of this investigation. /TRRL/

  • Corporate Authors:

    Norges Tekniske Hogskole

    Institutt for Veg-Og Jernbanebygging
    7034 Trondheim-NTH,   Norway 
  • Authors:
    • Melby, K
  • Publication Date: 1977-12


  • Norwegian

Media Info

  • Features: Figures; Photos; References;
  • Pagination: 176 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184285
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Meddelelse No. 16 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM