重庆科技大学学报（自然科学版）2026，Vol.28Issue(1)：50-59,10.DOI:10.19406/j.issn.2097-4531.2026.01.006
改扩建路基结合部典型病害的地震波传播特征分析
Analysis of Seismic Wave Propagation Characteristics for Typical Defects at the Junction of Reconstructed and Expanded Subgrades
摘要
Abstract
Accurate identification of defects at the junction of reconstructed and expanded subgrades is crucial for ensuring road operational safety.Two-dimensional numerical models incorporating typical defects,such as cavities,fractures,and incompactness,are established based on the seismic wave method to analyze the influence of these defects at different locations and of various types on seismic wave propagation characteristics.Multiple geophones are deployed on the model surface to collect data for time-domain,frequency-domain,and time-frequency analysis.The results indicate that defects at different locations and of various types significantly affect seismic wave propaga-tion.Among these,shallow defects,as well as elongated voids,circular voids,and fractured defects,induce the most intense wavefield disturbances,exhibiting higher identifiability.Conversely,deep defects,rectangular voids,and incompact defects with limited dimensions show less distinct disturbance characteristics,making them more challenging to identify.The multi-dimensional feature extraction method effectively reveals the time-frequency evo-lution law of defect interference.关键词
改扩建路基/地震波/数值模拟/时频分析Key words
reconstruction and expansion of subgrade/seismic wave/numerical simulation/time-frequency analysis分类
交通工程引用本文复制引用
荣耀,刘金枝..改扩建路基结合部典型病害的地震波传播特征分析[J].重庆科技大学学报（自然科学版）,2026,28(1):50-59,10.基金项目
江西省主要学科学术和技术带头人培养计划领军人才项目"基于三维层析成像的改扩建路基施工质量控制创新技术研发与成果推广应用"(20225BCJ22014) （20225BCJ22014）
江西省交通运输厅科技资助项目"基于三维层析成像的红砂岩路基施工质量检测技术研究"(2023C0005) （2023C0005）
