Table 2: Effective values of environmental vibration acceleration (unit: m/s-2).

Vibration isolation types Measuring points Without vibration isolation With vibration isolation ARF
Maximum Average Maximum Average Range Average
Rigid sandwich wall Measuring point at the distance of 35m away from railway center 0.0188 0.0160 0.0062 0.0050 0.26~0.37 0.32
Measuring point at the distance of 40m away from railway center 0.0134 0.0111 0.0063 0.0051 0.35~0.55 0.46