季冻区路基填土冻胀应变与冻胀力影响因素研究  

Study on Frost Heave Strain and Frost Heave Force of Subgrade Fillin Seasonal Freezing Region

作　　者：宋琪琛 李顺群 李有兵[3] 井乐炜 方心畅 周燕 Song Qichen;Li Shunqun;Li Youbing;Jing Lewei;Fang Xinchang;Zhou Yan(School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment,Tianjin Chengjian University,Tianjin 300384,China;Power China Municipal Construction Group Co.,Ltd.,Tianjin 300384,China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津城建大学天津市软土特性与工程环境重点实验室,天津300384 [3]中国电建市政建设集团有限公司,天津300384

出　　处：《市政技术》2025年第3期74-79,共6页Journal of Municipal Technology

基　　金：国家自然科学基金项目(52478354);甘肃省重点研发计划项目(23YFGA0038)。

摘　　要：为探究多因素对季冻区路基填土冻胀应变和冻胀力的影响规律,基于正交试验设计,通过一维冻结试验与数值计算,研究了单向冻结条件下初始饱和度、冻结温度和冷端温度对路基冻胀应变和最大冻胀力影响的显著性。研究结果表明:各因素对冻胀应变显著性影响大小依次为初始饱和度>冻结温度>冷端温度;对最大冻胀力显著性影响大小依次为冻结温度>初始饱和度>冷端温度;并通过对比分析可知,初始饱和度与冻结温度对冻胀应变影响为差异性极显著,冻结温度对最大冻胀力影响为差异性显著。该研究结果对寒区铁路路基工程安全性评价与防冻害设计具有重要参考价值。To investigate the influence law of multiple factors on frost heave strain and frost heave force of subgrade fill in seasonally frozen regions,an orthogonal experimental design was employed.1D freezing tests and numerical simulations were conducted to examine the significance of initial saturation,freezing temperature,and cold-end temperature on frost heave strain and the maximum frost heave force under unidirectional freezing conditions.The results indicate that the factors influencing frost heave strain are ranked in significance as follows:initial saturation>freezing temperature>cold-end temperature;for maximum frost heave force,the ranking is:freezing temperature>initial saturation>cold-end temperature;Comparative analysis reveals that initial saturation and freezing temperature have extremely significant effects on frost heave strain,while freezing temperature has a significant different impact on the maximum frost heave force.These findings provide valuable insights for safety assessments and antifreeze design in railway subgrade engineering in cold regions.

关 键 词：铁路路基 冻胀特征 数值模拟 正交试验 

分 类 号：U213.1[交通运输工程—道路与铁道工程] TU445[建筑科学—岩土工程]