基于振动台试验的加筋土挡墙台阶效应分析

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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 words： soil mechanics reinforced soil retaining wall shaking table test tier design number of tiers dynamic characteristics

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	Articles by authors
	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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