Abstract:

Field vibratory measurement analysis is necessary to the investigation into the vibration of roadside struc-tures caused by the impact compaction of existing cement concrete pavement.In this paper,the roadside vibratory impulse propagation and corresponding declining trend during the impact compaction are summarized based on the vibratory signals measured by the acceleration transducers set at the roadside.Diferent acceleration magnitudes with/without the isolafion trench between the vibrati0n source and the structures are also analyzed and compared.showing that the trench is helpful to the vibration isolation.Moreover,it is concluded that the safe range to prevent roadside structures from being afected by the impact compaction is 15 m far away from the compaction source.Thus,a guideline is provided for the practical impact compaction of existing cement concrete pavement.

Key words: impact compaction, existing cement concrete pavement, vibratory measurement