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分析了实体波阻块(EWIB)和蜂窝状波阻块(HWIB)对高速铁路引发低频振动的隔振效果.首先建立了列车-桥墩-土体计算模型,将桥墩处的实测加速度转换为作用在土体表面的动力荷载;然后计算了空沟和地下连续墙的隔振效果,并与EWIB和HWIB的隔振效果进行了对比.结果表明:对于高速铁路运行产生的低频振动,EWIB可以使地表振级降低5～10dB,HWIB可使地表振级降低6～12dB;对于10Hz以内的低频振动,HWIB有更好的隔振效果,使振动幅值降低80%以上.
The vibration isolation effect of EWIB and HWIB on low-frequency vibration induced by high-speed railway is analyzed.Firstly, the model of train-piers-soil calculation is established, and the measured acceleration at piers is converted into action The dynamic loads on the soil surface are calculated, and then the vibration isolation effects of the hollow ditch and the diaphragm wall are calculated and compared with the isolation efficiencies of EWIB and HWIB. The results show that for the low-frequency vibration generated by the high-speed railway operation, EWIB can make The ground vibration level is reduced by 5 ~ 10dB, and the HWIB can reduce the ground vibration level by 6 ~ 12dB. For low frequency vibration within 10Hz, HWIB has better vibration isolation effect, reducing the vibration amplitude by more than 80%.