中外公路2025，Vol.45Issue(6)：77-84,8.DOI:10.14048/j.issn.1671-2579.2025.06.009
砂土声波衰减特性与压实度的关系研究
Sound Attenuation Characteristics in Relation to Compaction Degree in Sandy Soil
摘要
Abstract
In order to investigate the effect of water content and compaction degree on the attenuation characteristics of sound waves in sandy soil,this paper first determined the particle gradation of the soil through a sieving test and identified its optimal water content through a compaction test.Then,six sets of ring knife specimens of sandy soil with different water contents and nine sets with varying compaction degrees were prepared.Ultrasonic testing was carried out using the acoustic transmission method,and the received acoustic signals were subjected to time-frequency analysis to extract acoustic characteristic parameters indicative of the compaction degree.Finite element simulation was employed to explore the propagation mechanisms of ultrasonic waves in sandy soil with different compaction degrees.The results show that with the increase in water content,the maximum amplitude and acoustic wave energy first decrease and then increase,while the attenuation coefficient first increases and then decreases.With the increase in compaction,both the maximum amplitude and acoustic wave energy increase significantly.Based on the quantitative relationship between acoustic wave amplitude and energy,a non-destructive testing method is proposed to invert the compaction degree of sandy soil using ultrasonic parameters.关键词
路基工程/砂土/含水率/压实度/无损检测/超声波/时频分析Key words
subgrade engineering/sandy soil/water content/compaction/non-destructive testing/ultrasound/time-frequency analysis分类
交通工程引用本文复制引用
LIU Junbin,LONG Shiguo..砂土声波衰减特性与压实度的关系研究[J].中外公路,2025,45(6):77-84,8.基金项目
国家自然科学基金资助项目(编号:51908481) （编号:51908481）
