冻土路基热收支状态尺度效应的显著性分析  

Significant Analysis of Scale Effect of Permafrost Subgrade Heat Budget State

作　　者：魏尧 董元宏[1] 彭惠[1] WEI Yao;DONG Yuanhong;PENG Hui(State Key Laboratory of Road Engineering Safety and Health in Cold and High-altitude Regions,CCCC First Highway Consultants Co.,Ltd.,Xi'an 710065,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司高寒高海拔地区道路工程安全与健康国家重点实验室,西安710065

出　　处：《路基工程》2023年第2期11-18,共8页Subgrade Engineering

基　　金：中国交建科技研发项目(2021-ZJKJ-PTJS02、2020-ZJKJ-PTJS04、2020-ZJKJ-QNCX09、2020-ZJKJ-PTJS12)。

摘　　要：基于最大融化深度、基底总吸热量、冻土融化潜热和热融蚀敏感系数四个指标,从高度效应、宽度效应、坡度效应和冻土年平均地温方面综合阐述了冻土路基热收支的尺度效应。同时基于统计学原理,对影响冻土路基热收支尺度效应的因素进行显著性分析,探究多因素交互作用的效应性。结果表明:路基高度对最大融化深度的影响最大,冻土年平均地温对基底总吸热量的影响最大,路基宽度和冻土年平均地温对冻土融化潜热量的影响最大,路基高度和路基宽度对冻土融化潜热量的影响最大。研究冻土路基热收支尺度效应,应综合考虑多因素之间的交互作用。Based on the four indicators of maximum thawing depth,total heat absorption of basement,latent heat of permafrost thawing and thermal thawing sensitivity coefficient,the scale effect of heat budget of permafrost subgrade was comprehensively expounded from the aspects of height effect,width effect,slope effect and annual average ground temperature of permafrost.At the same time,based on statistical principles,a significant analysis of the factors affecting the heat budget scale effect of permafrost subgrade was carried out to explore the effect of multi-factor interaction.The results show that the subgrade height has the greatest influence on the maximum thawing depth,the annual average ground temperature of the permafrost has the greatest influence on the total heat absorption of the basement,the subgrade width and the annual average ground temperature of the permafrost have the greatest influence on the latent heat of permafrost thawing,the subgrade height and the subgrade width has the greatest effect on the latent heat of permafrost thawing.In order to study the scale effect of the heat budget of permafrost subgrade,the interaction among many factors should be considered comprehensively.

关 键 词：冻土路基 热收支状态 尺度效应 显著性分析 

分 类 号：U416[交通运输工程—道路与铁道工程]