SEISMIC RESPONSE OF REINFORCED STEEP SOIL SLOPES: RESULTS OF A SHAKING TABLE STUDY

A series of shaking table tests were performed at the University of Washington as part of a larger investigation of the seismic response of geosynthetic reinforced soil (GRS) slopes. The model slopes, 4 ft in height, were constructed with a wrapped face at a slope of 63". All were designed to have a static factor of safety of 1.0. The models were subjected to a sinusoidal frequency of 5 Hz on the shaking table. Model characteristics such as embedment length to slope height ratio (L/H) and geosynthetic spacing were varied in the testing program. Backfill settlement, significant lateral and vertical shearing in the reinforced zone, and development of a graben type failure wedge in the backfill behind the zone of reinforcement were observed. Test results indicated that as the L/H ratio and reinforcement strength increased and the reinforcement spacing decreased, the yield acceleration for the slope increased. A definite bi-linear failure surface was observed in all slopes. The results of the study indicate that GRS slopes are very safe in terms of their seismic resistance.

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  • English

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  • Accession Number: 00988630
  • Record Type: Publication
  • ISBN: 0784407444
  • Report/Paper Numbers: Volume II
  • Files: TRIS
  • Created Date: Apr 12 2005 12:00AM