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Compaction equipment worked behind the retaining walls causes additional lateral earth pressures acting on the wall. The effect of compaction-induced stress (CIS) usually neglected when designing the retaining walls. Geosynthetic-Reinforced Soil walls (GRS walls) have increasing popularity in Egypt in the last years. The earth pressure at the facing of a Geosynthetic Reinforced Soil wall (GRS wall) is different from that in the natural soil. The internal lateral pressure in the GRS soil is governed by compaction-induced stresses (CIS) and additional confining effects that the reinforcement provides to the soil. The compaction-induced stress for GRS wall is difficult to be predicted during the design stage because it depends on the characteristics of compaction equipment and other factors. The objectives of the research are:1) Studying the effect of compact the backfill of GRS wall by vibratory plates on the internal stability, the external stability, and the foundation soil for GRS wall. 2) Evaluating the performance of the various types of vibratory plates which used to compact the backfill for GRS wall. So, a finite element analysis using GEO5 program was used to achieve these objectives. Finally, the recommendations for the design and construction of GRS walls were highlighted.

COMPACTION–INDUCED STRESS IN GEOSYNTHETIC REINFORCED SOIL WALLS