岛状多年冻土路基差异沉降影响因素研究.pdf

施工技术 2011年8月上 86 CONSTRUCTION TECHNOLOCY 第40卷第346期 岛状多年冻土路基差异沉降影响因素研究 宋新生 (河南城建学院交通工程系，河南平顶山467036) [摘要]在分析岛状多年冻土路基差异沉降影响因素及成因的基础上，建立了岛状多年冻土路基工后差异沉降计 算模型，系统研究了路基高度、融化盘厚度、融化盘面积、融化盘偏移对冻土路基差异沉降的影响.结果表明：路基 最大差异沉降量随着路基高度、融化盘厚度、融化盘直径的增加而增大，但差异沉降量增幅随着路基高度、融化盘 厚度、融化盘直径的增加而逐渐减缓；在相同融化盘深度、相同融化盘半径的前提下，融化盘偏移对路基差异沉降 的影响可忽略不计. [关键词]道路工程；岛状多年冻土；差异沉降；影响因素 [中图分类号]U416.1 [文献标识码]A [文章编号]1002-8498(2011)15-0086-05 Influence Factors on Differential Settlement of Island Permafrost Subgrade Song Xinsheng Department of Traffic Engineering He'nan University of Urban Construction Pingdingshan He'nan 467036 China) Abstract:Based on analyzing the cause and influence factors on differential settlement of island permafrost subgrade the authors build calculation model of post-construction differential settlement for island permafrost subgrade and systematically research on influence of subgrade height thaw tray thickness thaw tray area and thaw tray migration on differential settlement of island permafrost subgrade. The results show that the maximum differential settlement of subgrade increases with the increasing of subgrade height thaw tray thickness and thaw tray diameter.But the increase amplitude of differentia settlement gradually decreases with the increasing of subgrade height thaw tray thickness and thaw tray diameter.Under the conditions of the same depth and the same thaw tray diameter the influence of thaw tray migration on subgrade differential settlement can be neglected. Key words:road enginee...