Analysis on Vibration Attenuation Law and Safety Distance Prediction
There is a thick collapsible loess in the roadbed of a certain expressway,which needs to be reinforced by dynamic compaction.However,the working area is adjacent to a reinforced concrete reservoir,and the vibration effect generated by dynamic compaction may damage the structure of the reservoir.In order to determine the safe construction distance,four compaction points and four measuring lines were set up during the research process.Vibration sensors were used to detect the peak vibration velocity of the soil,and the attenuation law of dynamic compaction vibration was analyzed based on monitoring data.It was found that the attenuation rate of compaction energy was first fast and then slow,and exhibited exponential attenuation in the early stage.Based on the Sadovsky formula,establish the relationship between the peak vibration velocity and the safe distance,and calculate the theoretical safe distance for compaction construction.
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