| 青藏铁路路基下融化夹层特征及其对路基沉降变形的影响 |
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| 引用本文： | 高宝林,孙志忠,董添春,武贵龙.青藏铁路路基下融化夹层特征及其对路基沉降变形的影响[J].冰川冻土,2015,37(1):126-131. |
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| 作者姓名： | 高宝林 孙志忠 董添春 武贵龙 |
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| 作者单位： | 1. 青藏铁路公司工务部, 青海 西宁 810006;
2. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;
3. 中国科学院 寒区旱区环境与工程研究所 青藏高原北麓河冻土工程与环境综合观测研究站, 青海 格尔木 816000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2012CB026106); 国家自然科学基金创新研究群体项目(41121061); 国家自然科学基金优秀国家重点实验室研究项目(41023003); 冻土工程国家重点实验室自主课题(SKLFSE-ZT-09)资助 |
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| 摘 要： | 基于青藏铁路多年冻土区路基地温与变形现场监测资料, 研究了青藏铁路路基下融化夹层特征及其对路基沉降变形的影响. 结果表明:在已有监测场地中, 青藏铁路沿线天然场地融化夹层发育较少, 而路基下融化夹层发育较多. 低温冻土区路基下融化夹层能够逐渐完全回冻使其消失, 高温冻土区大部分路基下融化夹层有进一步发展的趋势. 当融化夹层下部为高含冰量冻土时, 融化夹层与路基沉降变形关系密切, 路基易产生较大的沉降变形; 当融化夹层下部为低含冰量冻土时, 路基沉降变形较小.
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| 关 键 词： | 青藏铁路 冻土路基 融化夹层 现场监测 沉降变形 |
| 收稿时间： | 2014-07-08 |
| 修稿时间： | 2014-12-11 |
Characteristics of thawed interlayer beneath embankment of the Qinghai-Tibet Railway in permafrost regions and its effect on embankment settlement deformation |
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| GAO Baolin,SUN Zhizhong,DONG Tianchun,WU Guilong.Characteristics of thawed interlayer beneath embankment of the Qinghai-Tibet Railway in permafrost regions and its effect on embankment settlement deformation[J].Journal of Glaciology and Geocryology,2015,37(1):126-131. |
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| Authors: | GAO Baolin SUN Zhizhong DONG Tianchun WU Guilong |
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| Institution: | GAO Baolin;SUN Zhizhong;DONG Tianchun;WU Guilong;Public Works Ministry of Qinghai-Tibet Railway Corporation;State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute ,Chinese Academy of Sciences;Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in Qinghai-Tibet Plateau,Cold and Arid Regions Environmental and Engineering Research Institute ,Chinese Academy of Sciences; |
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| Abstract: | Based on the data of ground temperature and deformation beneath embankment of the Qinghai-Tibet Railway in permafrost regions from 2006 to 2013, characteristics of thawed interlayer beneath embankment and its effect on the embankment settlement deformation are studied. The results indicate that there is a little thawed interlayers beneath the original field along the Qinghai-Tibet Railway. However, beneath the embankment the thawed interlayer develops widely, while it can be refrozen totally in the regions of lower annual mean ground temperature and developed further in the regions of higher annual mean ground temperature. Thawed interlayer is closely related to the embankment settlement deformation. The ice content of permafrost under the thawed interlayer controls the settlement deformation of the embankment; the higher the ice content is, the more the settlement deformation is. |
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| Keywords: | Qinghai-Tibet Railway embankment on permafrost thawed interlayer in-situ monitoring settlement deformation |
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