The mitigation of surface wave is the primary concern in ground vibration isolation due to the energy of wave propagation in the soil being concentrated in the surface wave. Herein, a composite in-filled trench composed of expanded polystyrene (EPS) and concrete was proposed and arranged as a periodic structure. The surface wave attenuation zone of the proposed periodic composite in-filled trenches and its application to the isolation of train-induced ground vibration were investigated in this paper. A field test of ground vibration induced by an elevated intercity railway was conducted in order to obtain acceleration data and their corresponding dominate frequencies. Then, a two-dimensional finite element mode using COMSOL was developed to reveal the dispersion relationship and attenuation zones of the surface wave in layered ground. The influence of the different parameters of the periodic composite in-filled trenches on the reduction performance of train-induced ground vibration was analyzed numerically. The results indicate that an effective reduction performance of the proposed periodic composite in-filled trenches can be achieved when their attenuation zone coincides with the frequencies of the surface waves. Moreover, the proposed composite periodic structure illustrated an improvement in ground vibration isolation compared to periodic in-filled trenches comprising concrete or EPS only.

由于波在土壤中传播的能量集中在表面波中，因此减少表面波是地面振动隔离的主要问题。在此，提出了一种由发泡聚苯乙烯 (EPS) 和混凝土组成的复合填充沟槽，并将其布置为周期性结构。本文研究了所提出的周期性复合填充沟槽的表面波衰减区及其在隔离列车引起的地面振动中的应用。对高架城际铁路引起的地面振动进行了现场试验，以获得加速度数据及其相应的主导频率。然后，使用 COMSOL 开发了二维有限元模型，以揭示层状地面中表面波的色散关系和衰减区。数值分析了周期性复合充填沟槽不同参数对列车诱发地面振动减振性能的影响。结果表明，当其衰减区与表面波频率重合时，可以实现所提出的周期性复合填充沟槽的有效衰减性能。此外，与仅包含混凝土或 EPS 的周期性填充沟槽相比，所提出的复合周期性结构说明了地面振动隔离的改进。结果表明，当其衰减区与表面波频率重合时，可以实现所提出的周期性复合填充沟槽的有效衰减性能。此外，与仅包含混凝土或 EPS 的周期性填充沟槽相比，所提出的复合周期性结构说明了地面振动隔离的改进。结果表明，当其衰减区与表面波频率重合时，可以实现所提出的周期性复合填充沟槽的有效衰减性能。此外，与仅包含混凝土或 EPS 的周期性填充沟槽相比，所提出的复合周期性结构说明了地面振动隔离的改进。