Abstract：Offset distance is one of the key factors affecting the mechanical and deformation performances of multi-tiered geogrids-reinforced soil retaining walls(GRSRW). Firstly，the ultimate bearing capacity test of the single-tiered GRSRW was carried out in door to determine the magnitude of the cyclic load. Furthermore，the displacement，the earth pressure and the reinforcement strain in multi-tiered geogrids-reinforced soil retaining walls(MGRSRW) and potential sliding surface were analyzed under consideration of variation of the offset distance D. The test results show that the maximum displacement of the panel and the peak of the additional horizontal earth pressure appear at 0.85 height of the wall. With increasing the offset distance，the horizontal displacement and the additional horizontal earth pressure of the lower retaining wall as well as the additional vertical pressure near the bottom of the panel decrease，and the strain of the geogrid at the bottom also decreases. The foundation settlement and the horizontal displacement of the retaining wall face increase obviously at the beginning of the test，while the increase amplitude slows down and converges as the number of cycles N is greater than 5 000. The potential sliding surfaces of the upper retaining wall mainly pass through the side of the loading plate near the facing panels and 0.6 height of the upper wall，or through the side of the loading plate away from the facing panels and 0.3–0.4 height of the facing panel. The results will enrich experimental researches and provide reference for practical applications.
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2021, Vol. 40 
