融化夹层厚度影响因素分析与片块石路基降温效果研究

发布时间：2018-04-15 05:15

本文选题：融化夹层 + 年平均地温　；参考：《冰川冻土》2014年04期

【摘要】：青藏公路沿线存在大量融化夹层,常年不冻的融化夹层会使路基出现沉陷、波浪等病害,严重威胁道路的安全运营.通过对昆仑山垭口南至五道梁的地质勘探资料和地温观测数据进行分析,研究了融化夹层厚度与年平均地温、路基高度的关系,发现融化夹层厚度随年平均地温的升高而增大,随路基高度的升高呈先减小后增大的趋势.根据以上研究,提出片块石路基对融化夹层进行处治,保护路基下伏多年冻土,并通过五道梁段片块石路基试验工程进行验证.通过对地温观测数据分析,发现片块石路基能很好的消除融化夹层,在同一深度处片块石路基地温明显低于普通路基,很好的保护了下伏多年冻土.
[Abstract]:There are a large number of thawed interlayers along the Qinghai-Tibet Highway, which will cause subgrade subsidence, wave and other diseases, which will seriously threaten the safe operation of roads.Based on the analysis of geological exploration data and geothermal observation data from south to Wudaoliang of Kunlun Mountain pass, the relationship between the thickness of thawed intercalation and the annual average ground temperature and the height of roadbed is studied. It is found that the thickness of thawed interlayer increases with the increase of annual mean earth temperature.With the increase of roadbed height, it decreases first and then increases.According to the above research, it is put forward to treat the thawed intercalation of the subgrade and protect the permafrost under the roadbed, and it is verified by the test project of the section of the Wudaoliang section.Through the analysis of the observation data of the ground temperature, it is found that the subgrade can eliminate the melt intercalation well, and the ground temperature of the subgrade is obviously lower than that of the ordinary subgrade at the same depth, which protects the permafrost.
【作者单位】：中交第一公路勘察设计研究院有限公司;
【基金】：国家科技支撑计划项目(2014BAG05B01;2014BAG05B03;2014BAG05B07)资助
【分类号】：U416.1

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