Previous studies have performed numerical simulations of adjacent parallel shield tunnels under train-induced vibration loads. However, few experimental studies have been performed for the interaction mechanisms. In this study, experimental modeling is conduced to explore the interaction of adjacent parallel shield tunnels subjected to different train-induced vibration loads. A new Hilbert-Huang transform (HHT) is applied to obtain the instantaneous responses of tunnels. The results show that the acceleration of the tunnel follows the trend of the train load curve. The peak accelerations of the tunnels experience a unimodal distribution along the train speed, while the dominant frequencies of the tunnels follow a bimodal distribution. The interaction between the adjacent parallel tunnels is significant. The transform of the vibration loads to the adjacent tunnel is through the soil below the tunnel. The farther away from the train load is, the greater the train speed corresponding to the dominant frequency peak.

先前的研究已经在列车引起的振动载荷下对相邻的平行盾构隧道进行了数值模拟。但是，很少有实验研究的相互作用机制。在这项研究中，实验模型有助于探索相邻的平行盾构隧道在不同列车引起的振动载荷作用下的相互作用。应用新的希尔伯特-黄变换（HHT）获得隧道的瞬时响应。结果表明，隧道的加速度遵循列车荷载曲线的趋势。隧道的峰值加速度沿火车速度经历单峰分布，而隧道的主导频率遵循双峰分布。相邻平行隧道之间的相互作用非常重要。振动载荷到相邻隧道的转换是通过隧道下方的土壤进行的。离火车负载越远，对应于主频率峰值的火车速度越大。