吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (6): 2128-2136.doi: 10.13229/j.cnki.jdxbgxb20200648
• 交通运输工程·土木工程 • 上一篇
Yong-hui SHANG1,2(),Lin-rong XU1,3(),Wei-zheng LIU1,Yu CAI1
摘要:
为分析不同类别填料相邻填筑特殊过渡段的动力特性,依托浩吉(浩勒报吉-吉安)重载铁路工程,采用现场激振试验与数值模拟相结合的方法,揭示了改良膨胀土和A组填料过渡段横、纵向路基的动力特性差异。结果表明:同荷载条件下,A组填料路基横断面动力响应大于改良膨胀土,具体表现为:动应力的增幅达到5%~8%,加速度的增幅达到40%~50%;当速度为120 km/h,轴重为25~30 t的重载列车运行时,过渡段交接处纵向路面动力响应存在0.8%~13%的加剧现象,且一定程度上受行车方向影响。本文研究成果可为重载铁路填料过渡段的精细化建设养修提供理论依据。
中图分类号:
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