RETAINING WALL UNDER ACTION OF ACCRECTED BACKFILL

The investigation demonstrates the effect of the construction sequence of backfill on the behavior of a rigid retaining wall. The accretion process was analyzed through an incremental finite element method with a nonlinear soil having the characteristics of Ottowa sand. Details are given of the analytical model and a numerical example is described. Figures are presented, which illustrate the stress-strain relation, horizontal normal stress distributions, vertical normal stress distributions, contact pressures and bending moments. Conclusion based on the study are presented. Stresses in the soil as determined through an incremental analysis (which accounts for the actual accretion process) differ from those found through an analysis which considers the body forces to be applied after the final geometry is attained. The differences between the two analyses are signficant within a relatively small region near the wall-soil interface, and are negligible elsewhere. Although in both analyses the normal contact pressures on the wall result in nearly equal horizontal thrusts, the line of action of the thrust is higher in the accreted system, and, therefore, the overturning moment and displacement of the wall are greater in this case. In the particular numerical example presented, the overturning moment and wall displacement in the accreted system are approximately 40 percent greater than those in the single lift case.

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  • Accession Number: 00260336
  • Record Type: Publication
  • Report/Paper Numbers: Proc Paper 10454
  • Files: TRIS
  • Created Date: Sep 5 1974 12:00AM