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

doi:10.7522/j.issn.1000-0240.2015.0013

冰川冻土 ›› 2015, Vol. 37 ›› Issue (1): 126-131.doi: 10.7522/j.issn.1000-0240.2015.0013

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

高宝林¹, 孙志忠², 董添春¹, 武贵龙^2,3

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

收稿日期:2014-07-08 修回日期:2014-12-11 出版日期:2015-02-25 发布日期:2015-03-23
通讯作者: 孙志忠,E-mail:sun@lzb.ac.cn. E-mail:sun@lzb.ac.cn
作者简介:高宝林(1970-),男,甘肃渭源人,高级工程师,1992年毕业于兰州铁道学院,现主要从事铁路工务管理与路基病害防治方面的研究工作.E-mail:369522123@qq.com
基金资助:
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

Characteristics of thawed interlayer beneath embankment of the Qinghai-Tibet Railway in permafrost regions and its effect on embankment settlement deformation

GAO Baolin¹, SUN Zhizhong², DONG Tianchun¹, WU Guilong^2,3

1. Public Works Ministry of Qinghai-Tibet Railway Corporation, Xining 810006, China;
2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
3. 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, Golmud 816000, Qinghai, China

Received:2014-07-08 Revised:2014-12-11 Online:2015-02-25 Published:2015-03-23

摘要/Abstract

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.

关键词: 青藏铁路, 冻土路基, 融化夹层, 现场监测, 沉降变形

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.

Key words: Qinghai-Tibet Railway, embankment on permafrost, thawed interlayer, in-situ monitoring, settlement deformation

中图分类号:

U213.1+4

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.

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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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

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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