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  2024, Vol. 43 Issue (12): 3108-3120    DOI:
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Analysis of tiers effect of geosynthetic-reinforced soil retaining walls based on shaking table tests
CAI Boyuan1,CAI Xiaoguang2,3,4,LI Sihan1,2,3,JING Liping5,XU Honglu5,ZHANG Yan6
(1. College of Geological Engineering,Institute of Disaster Prevention,Langfang,Hebei 065201,China;2. Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment,Langfang,Hebei 065201,China;3. Langfang City Key Laboratory of Research and Application of Geosynthetic Reinforced Soil Structure,Langfang,Hebei 065201,China;4. China Earthquake Disaster Prevention Center,Beijing 100029,China;5. Institute of Engineering Mechanics,China Earthquake Administration,Harbin,Heilongjiang 150080,China;6. College of Ecology and Environment,Institute of Disaster Prevention,Langfang,Hebei 065201,China)
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Abstract  The configuration and number of tiers are critical issues in the structural design of reinforced soil retaining walls. Through shaking table scaled model tests,comparative analyses were conducted on the seismic responses of single-tiered,two-tiered,and three-tiered modular geogrid-reinforced soil retaining walls with the same total height,aiming to investigate the tier effect in reinforced soil retaining walls. The test results show that the setting of tiers has a positive role in enhancing the overall stability of the retaining wall. However,the increase in the number of tiers contributes relatively little to this effect. The natural frequency and pre-vibration damping ratio of the retaining wall did not change significantly due to the setting of tiers and their quantity,but the presence of tiers significantly reduced key parameters such as the wall's acceleration amplification factor,horizontal displacement of the wall face,settlement at the top of the backfilled soil,earthquake-induced active soil pressure,and reinforcement strain. Additionally,the acceleration amplification factor of the three models increased nonlinearly along the wall height and reached a peak at the top of the wall. The active soil pressure under seismic action also exhibited a nonlinear distribution along the wall height,with peaks mostly occurring at the bottom of each tiered wall. As the loading acceleration increased,the incremental strain of the reinforcements in the three models also increased,showing a nonlinear trend along the wall height. The strain of the reinforcements in the lower tiers of the tiered reinforced soil retaining walls was generally higher than that in the upper tiers. The research results can provide a reference for the design and selection of reinforced soil retaining walls.
Key wordssoil mechanics      reinforced soil retaining wall      shaking table test      tier design      number of tiers      dynamic characteristics     
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CAI Boyuan1
CAI Xiaoguang2
3
4
LI Sihan1
2
3
JING Liping5
XU Honglu5
ZHANG Yan6
Cite this article:   
CAI Boyuan1,CAI Xiaoguang2,3, et al. Analysis of tiers effect of geosynthetic-reinforced soil retaining walls based on shaking table tests[J]. , 2024, 43(12): 3108-3120.
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https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I12/3108
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