路基工程Issue(3)：18-23,6.DOI:10.13379/j.issn.1003-8825.202511046
高原铁路运营振动荷载对冻土路基长期性能影响研究
On the Influence of Vibration Loads from High-plateau Railway Operations on the Long-term Performance of Frozen Soil Subgrades
摘要
Abstract
Appropriate vibration mitigation measures were selected and evaluated to ensure the long-term operational safety of frozen soil subgrades in high-plateau railways and to clarify the influence mechanisms of operational vibration loads on their thermal stability,mechanical properties,and settlement deformation.This paper selected typical cross-sections of a rock-filled ventilated embankment in continuous permafrost regions and a conventional earth-filled embankment in island-shaped permafrost regions.A one-year field monitoring program was conducted to record vibration parameters,ground temperature,and settlement.Combined with laboratory tests,this paper analyzed the effects of vibration loading and the vibration mitigation and thermal stabilization performance of riprap layers,thermal drains(thermosyphons),and elastic cushion layers.The results show that:the dominant frequency of the vibration load ranges from 20 to 60 Hz,with a base vibration attenuation rate of 60%-70%.The island-shaped permafrost exhibits higher thermal sensitivity,with a ground temperature increase of up to 161.54%at a depth of 5 m.After 2 million vibration cycles,the compressive strength and cohesion of the soil decrease by 33.33%and 32.06%,respectively.This study clarifies the influence patterns of vibration loads and the applicability of various vibration mitigation measures,providing theoretical support and technical guidance for the stable operation of railway subgrades in permafrost regions.关键词
高原铁路/冻土路基/振动荷载/长期性能减振措施/运营安全/适用性Key words
high-plateau railway/frozen soil subgrade/vibration load/long-term performance vibration mitigation measures/operational safety/applicability分类
建筑与水利引用本文复制引用
赵宗泰..高原铁路运营振动荷载对冻土路基长期性能影响研究[J].路基工程,2026,(3):18-23,6.基金项目
中国铁路青藏集团有限公司科技研究开发计划项目(QZ2023-G08) （QZ2023-G08）
