Abstract
To investigate the seismic response of the steel-strip reinforced soil retaining wall with fullheight rigid facing in terms of the acceleration in the backfill, dynamic earth pressure in the backfill, the displacements on the facing and the dynamic reinforcement strain distribution under different peak acceleration, a large 1-g shaking table test was performed on a reduced-scale reinforced-earth retaining wall model. It was observed that the acceleration response in non-strip region is greater than that in potential fracture region which is similar with the stability region under small earthquake, while the acceleration response in potential fracture region is greater than that in stability region in middle-upper of the wall under moderately strong earthquakes. The potential failure model of the rigid wall is rotating around the wall toe. It also was discovered that the Fourier spectra produced by the inputting white noises after seismic wave presents double peaks, rather than original single peak, and the frequency of the second peak trends to increase with increasing the PGA (peak ground amplitude) of the excitation which is greater than 0.4 g. Additionally, the non-liner distribution of strip strain along the strips was observed, and the distribution trend was not constant in different row. Soil pressure peak value in stability region is larger than that in potential fracture region. The wall was effective under 0.1 g-0.3 g seismic wave according to the analyses of the facing displacement and relative density. Also, it was discovered that the potential failure surface is corresponds to that in design code, but the area is larger. The results from the study can provide guidance for a more rational design of reinforced earth retaining walls with full-height rigid facing in the earthquake zone.
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Acknowledgements
This research was founded by the National Natural Science Foundation of China (Grant No. 51708163), Research Program of the Ministry of Transport of the People’s Republic of China (Grant No. 2013318800020) and Doctoral Innovation Fund Program of Southwest Jiaotong University (Grant No. D-CX201703). The authors are grateful to the unnamed reviewers for their valuable comments on the early version of the manuscript.
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Cao, Lc., Fu, X., Wang, Zj. et al. Seismic responses of the steel-strip reinforced soil retaining wall with full-height rigid facing from shaking table test. J. Mt. Sci. 15, 1137–1152 (2018). https://doi.org/10.1007/s11629-017-4598-2
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DOI: https://doi.org/10.1007/s11629-017-4598-2