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多年冻土地区路基变形场和应力场的数值分析
引用本文:毛雪松,王秉纲,胡长顺,窦明健. 多年冻土地区路基变形场和应力场的数值分析[J]. 冰川冻土, 2006, 28(3): 396-400. DOI: 10.7522/j.issn.1000-0240.2006.0058
作者姓名:毛雪松  王秉纲  胡长顺  窦明健
作者单位:长安大学, 特殊地区公路工程教育部重点实验室, 陕西, 西安, 710064
摘    要:为了研究冻土的冻胀特性对公路路基稳定性的影响,建立了冻土路基变形场及应力场的二维数值计算模型,并应用有限元法求解路基土体冻结时变形场和应力场的分布规律.分析了土基范围内冻胀带对路基应力场和变形场的作用,并计算了不同冻胀带范围对路基顶面变形场和应力场的影响.结果表明:冻胀带的存在是引起路基病害的直接原因,不同冻胀带范围将引起路基产生不同类型及不同规模的破坏,位于路面以下的冻胀带属于敏感冻胀带范围.

关 键 词:多年冻土地区  变形场  应力场  敏感冻胀带  
文章编号:1000-0240(2006)03-0396-05
收稿时间:2005-10-17
修稿时间:2006-03-04

Numerical Analyses of Deformation and Stress Fields in Permafrost Regions
MAO Xue-song,WANG Bing-gang,HU Chang-shun,DOU Ming-jian. Numerical Analyses of Deformation and Stress Fields in Permafrost Regions[J]. Journal of Glaciology and Geocryology, 2006, 28(3): 396-400. DOI: 10.7522/j.issn.1000-0240.2006.0058
Authors:MAO Xue-song  WANG Bing-gang  HU Chang-shun  DOU Ming-jian
Affiliation:Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an Shaanxi 710064, China
Abstract:In order to study the features of freeze-thaw settlement in the permafrost,in this paper a two-dimensional numerical model of deformation and stress fields in embankment is established,together with finite element method,to calculate the distributions of deformation and stress fields of the freezing soil in an embankment.The variation of stress and deformation fields in the freezing zone of an earth embankment is analyzed,and the effect of different frost-heaving zones on the deformation and stress of embankment surface is calculated.The calculations show that the frost-heaving zone causes damage directly to an embankment, different sensitivity of frost-heaving zone will bring different damage,and the freezing zone under a pavement is a sensitive frost-heaving zone.
Keywords:permafrost regions  deformation field  stress field  sensitive frost-heaving zone
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