PROPAGATION RULE OF SUBWAY VIBRATION IN BUILDING AND VIBRATION-ISOLATING EFFECT OF SAND LAYER

Based on a real building which is constructed over No.10 underground railway in Shanghai,the paper investigates the vibration isolating effect of sand layer and the propagation rule of vibration in structure by erecting soil-structure combining plan finite element method model.It shows that sand layer has little contribution to reducing the vibration.Meanwhile by discussing the difference between earthquake and subway vibration,it shows that element size should decided by the excellent frequency of vibration.In the end,farther isolating measures are suggested.