This study investigates the seismic performance of geosynthetic-reinforced modular block retaining walls backfilled with cohesive, fine grained clay-sand soil mixture. Shaking table tests were performed for three ½ scaled (wall height 190 cm) and ¼ scaled model walls to investigate the effects of backfill type, the influence of reinforcement length and reinforcement stiffness effects. The El Centro and Kobe earthquake records of varying amplitudes were used as base acceleration. Displacement of the front wall, accelerations at different locations, strains on the reinforcements, and the visual observations of the facing and the backfill surface were used to evaluate the seismic performance of model walls. The model walls were subjected to rigorous shaking and the walls did not exhibit any stability problems or signs of impending failure. The maximum deformations observed on the models with cohesive backfill was less than half of the deformation of the sand model. The load transfers between the geogrid and cohesive soil was comparable to that of sand and hence the needed reinforcement length was similar as well. As a result; the model walls with cohesive backfills performed within acceptable limits under seismic loading conditions when compared with granular backfilled counterparts.

本研究调查了土工合成材料加筋模块化砌块挡土墙的抗震性能，回填有粘性细粒粘土-砂土混合物。对三个 ½ 比例（墙高 190 厘米）和 1/4 比例模型墙进行了振动台测试，以研究回填类型的影响、钢筋长度的影响和钢筋刚度的影响。不同振幅的 El Centro 和 Kobe 地震记录被用作基础加速度。前墙的位移、不同位置的加速度、钢筋的应变以及饰面和回填表面的目视观察被用来评估模型墙的抗震性能。模型墙经受了剧烈的震动，墙体没有出现任何稳定性问题或即将发生故障的迹象。在具有粘性回填的模型上观察到的最大变形小于砂模型变形的一半。土工格栅和粘性土之间的荷载传递与沙子相当，因此所需的加固长度也相似。因此; 与颗粒回填的对应物相比，具有粘性回填的模型墙在地震荷载条件下的性能在可接受的范围内。