为了研究土工袋加筋土挡墙在地震作用下的抗震性能,开展了大型的振动台模型试验。结果表明:随着加载的持续进行,挡墙模型的自振频率降低,阻尼比增加;PGA放大系数随输入地震动峰值加速度的增大而减小,墙高对PGA放大系数的影响反倒不大。土工袋加筋土挡墙的峰值动土压力呈现“中间小,两头大”的分布规律,且墙高越高,输入地震动峰值加速度越大,峰值动土压力越大,而不同地震波形的频谱差异对土压力量值和分布的影响较小。通过数值模拟研究了坡度对土工袋加筋土挡墙力学特性的影响,认为土工袋加筋土挡墙墙后侧向土压力和筋材的拉应力随着墙体坡度的增大而增大,当墙体坡度小于1∶0.75时,侧向土压力较小;当墙体坡度大于1∶0.75时,墙后土压力迅速增加,土压力的分布图式类似呈三角形分布。筋材的拉应力沿长度方向呈单峰型分布,各层筋材的拉应力随上覆填土厚度的增加而增大,但增加的幅度逐渐减小。另外,土工袋加筋土挡墙的剪应变增量、活动区范围以及位移均随墙体坡度的增大而增大。 In order to study the seismic behavior of geotextile-reinforced earth retaining wall under earthquake action, a large-scale shaking table model test was carried out. The results show that with the continuous loading, the natural frequency of the retaining wall model decreases and the damping ratio increases. The PGA amplification factor decreases with the increase of the peak acceleration of the input ground, and the wall height has little effect on the PGA amplification factor . The peak earth pressure of geotextile-reinforced earth retaining wall presents the distribution law of “small middle and large two”, and the higher the wall height is, the greater the peak acceleration of input earthquakes and the greater the earth pressure of earthquakes, and the different earthquakes The influence of spectral differences on the magnitude and distribution of earth pressure is small. The effect of slope on the mechanical properties of geotextile-bag reinforced earth retaining walls was studied by numerical simulation. It is considered that the earth pressure and the tensile stress of the geotextile material increase with the increase of wall slope When the wall slope is less than 1: 0.75, the lateral soil pressure is smaller. When the wall slope is greater than 1: 0.75, the earth pressure behind the wall increases rapidly. The distribution of earth pressure is similar to the triangular distribution. The tensile stress of the reinforcement material is distributed in the form of a single peak in the length direction. The tensile stress of each layer of reinforcement material increases with the increase of the thickness of the upper overburden, but the increasing amplitude decreases gradually. In addition, the increment of shear strain, the range of active area and the displacement of geotextile-reinforced earth retaining wall all increase with the increase of wall slope.