The effect of isolating vibration is due to the depth and thickness of the trench. When the depth of barriers is more than a Rayleigh wave length, the effectiveness of isolating vibration increases for a little with the barrier depth increase.

• 填充沟的深度在一倍瑞利波波长内对隔振效果有较大影响,并且与宽度一起决定其隔振效果,但当屏障深度超过一倍瑞利波波长后,屏障深度对隔振效果的影响很小。