中文摘要：

分析了波阻块（WIB）对地铁荷载引发低频振动的隔振效果．首先建立了列车-隧道-地基的数值计算模型，将地铁移动荷载简化为沿隧道向前的移动荷载列，计算了埋设WIB前后场地地表的振动情况，然后对比分析了WIB的埋深和构造对隔振效果的影响，最后与地下连续墙和隔振沟的隔振效果进行了比较．结果表明，对于地铁运行产生的低频振动，WIB可以使地表振级降低5～12dB，振动幅值降低60％以上，具有比其他隔振措施更好的隔振效果．

英文摘要：

The mitigation effect of WIB（wave impeding block） for low-frequency vibrations induced by subway was studied. The numerical calculation model of train, tunnel and ground was established, simplifying the train load as moving dynamic load along the tunnel, ground vibration with WIB and without WIB was calculated, and the mitigation effect of WIB with different depth and shape was studied. The mitigation effect of WIB, continuous wall and open trench were compared. Results showed WIB can reduce vibration level of ground surface by 5-12 dB and vibration amplitude above 60 % for low-frequency ground vibration induced by subway loads, superior to two other kinds of mitigation measures.