多年冻土隧道浅埋段热棒群防护效果试验研究
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- 英文论文题名：Experimental Study on Protective Effect of Thermal Probe Group in Shallow Section of Tunnel in Permafrost Area
- 论文作者：刘锟 ; 赵相卿 ; 李奋 ; 杨永鹏 ; 程佳
- 英文论文作者：Liu Kun ; Zhao Xiangqing ; Li Fen ; Yang Yongpeng ; Cheng Jia ; Northwest Research Institute Co.Ltd of CREC
- 年：2016
- 作者机构：中铁西北科学研究院有限公司;
- 论文关键词：多年冻土 ; 隧道浅埋段 ; 热棒群 ; 防护技术
- 英文论文关键词：thermal probe group ; permafrost ; the shallow section of tunnel ; protective technology
- 会议召开时间：2016-10-14
- 会议录名称：“川藏铁路建设的挑战与对策”2016学术交流会论文集
- 语种：中文
- 分类号：U456
- 学会代码：ZGTD
- 会议名称：“川藏铁路建设的挑战与对策”2016学术交流会
- 会议地点：中国四川成都
- 主办单位：中国铁道学会、中国铁道学会工程分会、中国中铁股份有限公司、中铁二院工程集团有限责任公司
- 学会名称：中国铁道学会
- 页数：6
- 文件大小：429k
- 原文格式：O
- 会议级别：全国
摘要
高原多年冻土区隧道的修建,将不可避免地影响到隧道围岩的热稳定性,并在隧道结构层外侧形成一定厚度的季节活动层,即融化圈。在多年冻土隧道进出口段,由于埋深较浅,融化圈往往回冻时间过长或不能回冻,反复冻融对隧道衬砌结构影响较大或导致结构破坏,给隧道安全运营带来隐患。结合共玉公路姜路岭隧道浅埋段的冻土环境和工程特点,在隧道进出口设置了热棒群防护技术对多年冻土隧道浅埋段围岩的回冻过程及规律进行现场试验研究。现场试验结果表明:①经过1个冻融循环后,姜路岭隧道浅埋段热棒群作用范围内,土体基本处于冻结状态,洞周基本形成冻土防渗帷幕,避免了冻结层上水向隧道结构方向的渗入,达到了隧道支护结构免受法向冻胀力破坏的目的。②试验段埋深大于3.0m且位于姜路岭阴坡,对于埋深小于3.0m或阳坡地段的浅埋隧道,其防护效果有待进一步研究。
The construction of tunnel in permafrost regions will inevitably affect the thermal stability of surrounding rock,and form a certain thickness of seasonal active layer on the outside of the tunnel structure.Import and export section tunnel in permafrost,due to the shallow depth,melting laps tend to freeze time is too long or not to freeze,repeated freezing and thawing effect on tunnel lining structure is larger or lead to structural damage,to the safe operation of the tunnel brings hidden trouble.In combination with Gong-Yu Road Jiangluling tunnel shallow buried section of frozen soil environment and the project characteristic,in tunnel import and export set hot rod group protection technology of permafrost tunnel shallow buried section surrounding rock refreezing process and rules of field experiment,field test results show that ① after a freeze-thaw cycle,Jiangluling tunnel in the shallow buried section of the hot rod group action range,soil basic in a frozen state,hole week basically formed impervious curtain of frozen soil,avoid the suprapermafrost water to the direction of the tunnel structure of infiltration,reached the tunnel support structure from the method of normal frost heaving force breaking bad.②The test section buried deeper than 3m and is located in the shady slope of the Jiangluling,for buried depth is less than3.0m or sunny lots of shallow buried tunnel and its protective effect remains to be further study.
The construction of tunnel in permafrost regions will inevitably affect the thermal stability of surrounding rock,and form a certain thickness of seasonal active layer on the outside of the tunnel structure.Import and export section tunnel in permafrost,due to the shallow depth,melting laps tend to freeze time is too long or not to freeze,repeated freezing and thawing effect on tunnel lining structure is larger or lead to structural damage,to the safe operation of the tunnel brings hidden trouble.In combination with Gong-Yu Road Jiangluling tunnel shallow buried section of frozen soil environment and the project characteristic,in tunnel import and export set hot rod group protection technology of permafrost tunnel shallow buried section surrounding rock refreezing process and rules of field experiment,field test results show that ① after a freeze-thaw cycle,Jiangluling tunnel in the shallow buried section of the hot rod group action range,soil basic in a frozen state,hole week basically formed impervious curtain of frozen soil,avoid the suprapermafrost water to the direction of the tunnel structure of infiltration,reached the tunnel support structure from the method of normal frost heaving force breaking bad.②The test section buried deeper than 3m and is located in the shady slope of the Jiangluling,for buried depth is less than3.0m or sunny lots of shallow buried tunnel and its protective effect remains to be further study.
引文
[1]刘锟,蔡汉成,李奋.热棒群在多年冻土区隧道浅埋段防护中的应用[J].铁道工程学报,2013,9(9):60-64.Liu Kun,Cai Hancheng,Li Fen.Protection application of thermal probe group in the shallow-buried section of the permafrost runnels[J].Journal of Railway Engineering Society,2013,9(9):60-64.
[2]刘小刚.青藏铁路多年冻土隧道隔热保温研究[J].隧道建设,2010,30(3):225-230.Liu Xiaogang.The research of the Qinghai-Tibet railway permafrost tunnel insulation[J].Tunnel Construction,2010,30(3):225-230.
[3]叶秀玺.寒区隧道冻害防治技术研究[D].西安:长安大学,2010.Ye Xiuxi.Study on prevention of frost damage of tunnel in cold region[D].Xi'an:Chang'an University,2010.
[4]黄双林.昆仑山隧道施工期间围岩冻融圈的初步研究[J].冰川冻土,2003,29(supp1):100-103.Huang Shuanglin.A preliminary study of Kunlun Mountains tunnel surrounding rock during the construction of freezing thawing circle[J].Journal of Glaciology and Geocryology,2003,29(suppl):100-103.
[5]庄骏,等.热管技术及其工程应用[M].北京:化学工业出版社,2000,55-60.Zhuang Jun.et al Heat pipe technology and its application in Engineering[M].Chemical Industry Press,2000,55-60.
[6]丁靖康,等.多年冻土与铁路工程[M].北京:中国铁道出版社,2011,168-177.Ding Jingkang,et al.Permafrost and railway engineering[M],Beijing,China Railway Press,2011,168-177.
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[8]丁靖康.冻土地区热桩技术的应用[R].中铁西北科学研究院,1990.Ding Jingkang.Application of permafrost thermal pile technology[R].Northwest research institute co,.LTD of C.R.E.C.,1990.
[9]陈肖柏,等.土的冻结作用与地基[M].北京:科学出版社,2006.Chen Xiaobo.The role of soil freezing and Foundation[M].Beijing:Science Press,2006.
[10]牛东兴,李勇,熊治文,等.青藏铁路多年冻土区热棒路基地温场分析[J].铁道工程学报,2012(9),30-33.Niu Dongxing,Li Yong,Xiong Zhiwen.Tibet railway permafrost ground temperature hot rod field analysis[J].Journal of Railway Engineering,2012(9),30-33.
[2]刘小刚.青藏铁路多年冻土隧道隔热保温研究[J].隧道建设,2010,30(3):225-230.Liu Xiaogang.The research of the Qinghai-Tibet railway permafrost tunnel insulation[J].Tunnel Construction,2010,30(3):225-230.
[3]叶秀玺.寒区隧道冻害防治技术研究[D].西安:长安大学,2010.Ye Xiuxi.Study on prevention of frost damage of tunnel in cold region[D].Xi'an:Chang'an University,2010.
[4]黄双林.昆仑山隧道施工期间围岩冻融圈的初步研究[J].冰川冻土,2003,29(supp1):100-103.Huang Shuanglin.A preliminary study of Kunlun Mountains tunnel surrounding rock during the construction of freezing thawing circle[J].Journal of Glaciology and Geocryology,2003,29(suppl):100-103.
[5]庄骏,等.热管技术及其工程应用[M].北京:化学工业出版社,2000,55-60.Zhuang Jun.et al Heat pipe technology and its application in Engineering[M].Chemical Industry Press,2000,55-60.
[6]丁靖康,等.多年冻土与铁路工程[M].北京:中国铁道出版社,2011,168-177.Ding Jingkang,et al.Permafrost and railway engineering[M],Beijing,China Railway Press,2011,168-177.
[7]徐兵魁,熊治文.青藏高原多年冻土区热棒路基的设计计算[J].中国铁道科学,2006(5),89-92.Xu Bingkui,Xiong Zhiwen.Permafrost Regions hot rod embankment design calculations[J].China Railway Science,2006(5),89-92.
[8]丁靖康.冻土地区热桩技术的应用[R].中铁西北科学研究院,1990.Ding Jingkang.Application of permafrost thermal pile technology[R].Northwest research institute co,.LTD of C.R.E.C.,1990.
[9]陈肖柏,等.土的冻结作用与地基[M].北京:科学出版社,2006.Chen Xiaobo.The role of soil freezing and Foundation[M].Beijing:Science Press,2006.
[10]牛东兴,李勇,熊治文,等.青藏铁路多年冻土区热棒路基地温场分析[J].铁道工程学报,2012(9),30-33.Niu Dongxing,Li Yong,Xiong Zhiwen.Tibet railway permafrost ground temperature hot rod field analysis[J].Journal of Railway Engineering,2012(9),30-33.