Abstract The seismic performance of soilbags-built retaining wall model was studied experimentally. A series of small-scale shaking table tests with the input of different amplitude sinusoidal waves and a large-scale shaking table test in a designed laminar shear box with the input of the Wenchuan earthquake wave were carried out on soilbags' retaining wall models. For comparison, the small-scale shaking table tests were also conducted on horizontally reinforced retaining wall models. The horizontal acceleration responses, the Fourier spectra, the dynamic earth pressure and the lateral displacements of soilbags' retaining wall models were investigated in shaking table tests. The results show that the seismic response of the soilbags' retaining wall is equivalent to or even slightly better than that of the horizontally reinforced retaining wall. The fundamental frequency and the Fourier spectral characteristics of the soilbags’ retaining wall are similar to those of backfill sands. The dynamic earth pressure of the wall model fluctuates almost synchronously with the input Wenchuan wave and no residual earth pressure is induced by the seismic loading. The permanent lateral displacements are small when subjected to multiple shakings, providing a proof that the retaining wall of soilbags has a good seismic performance.

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土袋式挡土墙地震反应试验研究

摘要 对土袋式挡土墙模型的抗震性能进行了试验研究。对土袋挡土墙模型进行了一系列输入不同振幅正弦波的小规模振动台试验和输入汶川地震波在设计的层流剪切箱中进行的大型振动台试验。为了比较，还对水平加筋挡土墙模型进行了小规模振动台试验。通过振动台试验研究了土袋挡土墙模型的水平加速度响应、傅里叶谱、动土压力和侧向位移。结果表明，土袋的地震响应 挡土墙与水平加筋挡土墙相当甚至略胜一筹。土袋挡土墙的基频和傅里叶谱特征与回填砂相似。墙体模型的动土压力几乎与输入的汶川波同步波动，没有地震荷载引起的残余土压力。多次震动时永久侧向位移较小，证明土袋挡土墙具有良好的抗震性能。墙体模型的动土压力几乎与输入的汶川波同步波动，没有地震荷载引起的残余土压力。多次震动时永久侧向位移较小，证明土袋挡土墙具有良好的抗震性能。墙体模型的动土压力几乎与输入的汶川波同步波动，没有地震荷载引起的残余土压力。多次震动时永久侧向位移较小，证明土袋挡土墙具有良好的抗震性能。