We carried out a shaking table test on a slope model reinforced by multi-anchor piles. By analyzing the characteristics of acceleration in time domain, we obtained the spatial position variation characteristics of acceleration particles represented by peak acceleration ratio (R_a) and motion duration (B_du). Based on Fourier variation and statistical probability scatter matrix, we proposed the damage level correlation quantitatively characterized by the spectral characteristics of acceleration. Then the potential deformation and failure potential displacement parameters (P_d) of ground motion were calculated by Spectra Response Analysis (SPECTR), and regional differences of multi-anchor pile reinforcement were obtained by combining slope model stability analysis. We analyzed that R_a and B_du mainly reflected the zonal variation along the pile elevation under different earthquake intensities. The ratio of Peak Ground Velocity (PGV) to Peak Ground Acceleration (PGV/PGA) had a correlation with the peak input energy of ground motion. Seismic waves in low frequency band (≤10 Hz) had great influence on the structure. Pile sliding surface P_d value was large, which was easy to become the weak link of earthquake resistance of multi-anchor piles. The optimized multi-anchor piles acted as a buffer and energy dissipation for the deformation of the slope body under rarely occurred earthquake. The optimization effect was related to the position of the shock absorption layer. These results were helpful for us to provide theoretical basis for the optimal seismic design of multi-anchor piles.

我们对由多锚桩加固的边坡模型进行了振动台测试。通过分析时域加速度的特征，我们得到了峰值加速度比（R _a）和运动持续时间（B _du）所代表的加速度粒子的空间位置变化特征。基于傅立叶变异和统计概率散布矩阵，提出了基于加速度谱特征的损伤水平相关性定量分析方法。则潜在变形和破坏的潜在位移参数（P _d通过频谱响应分析法（SPECTR）计算地震动），并结合边坡模型稳定性分析，获得了多锚桩加固的区域差异。我们分析了R _a和B _du主要反映了不同地震烈度下沿桩高的区域变化。峰值地面速度（PGV）与峰值地面加速度（PGV / PGA）之比与地面运动的峰值输入能量相关。低频带（≤10Hz）的地震波对结构产生很大影响。桩滑动面P _d值大，容易成为多锚桩抗震的薄弱环节。优化后的多锚桩为边坡体在很少发生地震下的变形提供了缓冲和能量耗散。优化效果与减震层的位置有关。这些结果有助于我们为多锚桩的抗震优化设计提供理论依据。