季节冻土区防冻胀护道对保温路基地温特征影响效果研究
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摘要
运用土壤冻结条件下水热耦合输移基本方程及数值方法,考虑在铺设保温层情况下,加铺防冻胀护道对路基地温特征的影响规律,并与未加铺防冻胀护道的情况进行对比分析。结果表明:铺设保温材料对减小路基中部附近土体季节冻结深度有明显作用,但对路基两侧冻结深度影响相对较小;加铺防冻胀护道对边坡下土体季节冻结深度有一定程度的抬升作用,上升幅度由路基坡脚向路肩逐渐减小,但对路基中部附近土体季节冻结深度影响甚微;保温板-防冻胀护道复合路基结构形式,充分利用两种措施优点,对路基中心、路肩以及坡脚下最大冻结深度抬升的综合效果更好,抬升最大值分别为1.48、1.01、0.68 m。
The coupled heat-fluid transport equation and numerical method are employed to analyze the temperature field of the insulated roadbed with and without a frost-resistant berm.The results indicate that the insulation has an obvious effect on reducing the seasonal frozen depth below the central part of the roadbed,while it affects the frozen depth under the side slope to a smaller degree.The frost-resistant berm can reduce the frozen depth under the side slope.The amount of reduction becomes smaller from the shoulder to the toe of the embankment.However,it affects the frozen depth below the central part of the roadbed slightly.The insulated embankment with a frost-resistant berm has virtues of the insulation board and the frost-resistant berm.Therefore,it has a better effect on reducing the maximum frozen depth below the center,the shoulder and the toe of the embankment than the common embankment,with the maximum values of 1.48,1.01,0.68 m,respectively.
The coupled heat-fluid transport equation and numerical method are employed to analyze the temperature field of the insulated roadbed with and without a frost-resistant berm.The results indicate that the insulation has an obvious effect on reducing the seasonal frozen depth below the central part of the roadbed,while it affects the frozen depth under the side slope to a smaller degree.The frost-resistant berm can reduce the frozen depth under the side slope.The amount of reduction becomes smaller from the shoulder to the toe of the embankment.However,it affects the frozen depth below the central part of the roadbed slightly.The insulated embankment with a frost-resistant berm has virtues of the insulation board and the frost-resistant berm.Therefore,it has a better effect on reducing the maximum frozen depth below the center,the shoulder and the toe of the embankment than the common embankment,with the maximum values of 1.48,1.01,0.68 m,respectively.
引文
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[7]中交第一公路勘察设计研究院.高原多年冻土地区公路修筑技术研究总结报告[R].西安:中交第一公路勘察设计研究院,1999.
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[12]司剑锋.季节性冻土地区保温护道的设置原则[J].铁道标准设计,2008,(2):26-28.SI Jian-feng.The Design Principles of Insulating Berm onSeasonal Frozen Region[J].Railway Standard Design,2008,(2):26-28.
[13]许健,牛富俊,牛永红,等.季节冻土区保温路基设计参数[J].土木建筑与环境工程,2009,31(3):83-89.XU Jian,NIU Fu-jun,NIU Yong-hong,et al.The De-sign Parameter of Roadbed with Insulation in SeasonalFrozen Ground[J].Journal of Civil,Architectural&En-vironmental Engineering,2009,31(3):83-89.
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[16]铁道第一勘察设计院.沈哈客运专线D3K690+700~D3K693+000地基处理及路堤坡面防护工程地质勘察报告[R].西安:铁道第一勘察设计院,2006.
[17]铁道第一勘察设计院.哈达客运专线沈哈段季节性路基防护设计[R].西安:铁道第一勘察设计院,2007.
[18]魏智.中国东北地区多年冻土退化及漠河—大庆原油管道沿线冻土工程地质条件变化预报研究[D].兰州:中国科学院,2008:73-75.
[19]朱林楠.高原冻土区不同下垫面的附面层研究[J].冰川冻土,1988,10(1):8-14.ZHU Lin-nan.Study of the Adherent Layer on DifferentTypes of Ground in Permafrost Regions on the Qinghai-Tibet Plateau[J].Journal of Glaciology and Geocryology,1988,10(1):8-14.
[20]陈晓东,金旭,管彦武,等.长春地区地表温度日变、年变对地温测量的影响[J].地球物理学进展,2006,21(3):1008-1011.CHEN Xiao-dong,JIN Xu,GUAN Yan-wu,et al.The In-fluence of Daily and Annual Variation of the Surface Tem-perature on Near-surface Temperature Survey[J].Pro-gress in Geophysics,2006,21(3):1008-1011.
[21]王钧.中国地温分布的基本特征[M].北京:地震出版社,1990.
[22]徐学组,陶兆祥,傅素兰.典型融冻土的热学性质[M]//中国科学院兰州冰川冻土沙漠研究所.中国科学院兰州冰川冻土沙漠所集刊(第2号).北京:科学出版社,1981:104-112.
[2]CLARKE E S,KRZEWINSKI T G,METZ M C.TheTrans-Alaska Pipeline System Synthetically InsulatedWorkpad—An Evaluation of Present Conditions[C]//Pro-ceedings of the ASME Energy Resources Technology Con-ference and Exhibition.Texas:ASME,1981.
[3]ESCH D C.Insulation Performance Beneath Roads andAirfields in Alaska[C]//Proceedings of 4th InternationalSpecialty Conference.New York:ASCE,1986:713-722.
[4]GANDAHL R.The Use of Plastics Foam Insulation inRoads[C]//Proceedings of the 4th Canadian PermafrostConference.Ottawa:National Research Council of Cana-da,1982:570-576.
[5]LARSEN L A,KRZEWINSKI T G,BERGMAN J B.Useof Rigid Insulation below Grade for Roadways and ParkingAreas[C]//Proceedings of the 6th International SpecialtyConference.New York:ASCE,1991:428-437.
[6]胡宇.TIF保温板在青藏高原多年冻土区路基工程中的应用研究[D].成都:西南交通大学,2003:39-52.
[7]中交第一公路勘察设计研究院.高原多年冻土地区公路修筑技术研究总结报告[R].西安:中交第一公路勘察设计研究院,1999.
[8]汪双杰,陈建兵,黄晓明.冻土路基护道地温特征研究[J].岩石力学与工程学报,2006,25(1):146-151.WANG Shuang-jie,CHEN Jian-bing,HUANG Xiao-ming.Study on Ground Temperature Characteristics ofEmbankment Berm on Permafrost[J].Chinese Journal ofRock Mechanics and Engineering,2006,25(1):146-151.
[9]葛建军.青藏铁路多年冻土区保温护道路基温度场数值模拟研究[J].冰川冻土,2008,30(2):274-279.GE Jian-jun.Numerical Simulation of the Temperature Re-gime within an Embankment with Insulated Berm of theQinghai-Tibet Railway[J].Journal of Glaciology and Geo-cryology,2008,30(2):274-279.
[10]孙增奎,王连俊,白明洲,等.青藏铁路多年冻土路堤温度场的有限元分析[J].岩石力学与工程学报,2004,23(20):3454-3459.SUN Zeng-kui,WANG Lian-jun,BAI Ming-zhou,et al.Finite Element Analysis of Temperature Field of Qinghai-Tibet Railway Embankment on Permafrost[J].ChineseJournal of Rock Mechanics and Engineering,2004,23(20):3454-3459.
[11]汪双杰,陈建兵,章金钊.保温护道对冻土路基地温特征的影响[J].中国公路学报,2006,19(1):12-16,22.WANG Shuang-jie,CHEN Jian-bing,ZHANG Jin-zhao.Influences of Insulating Berm on Ground TemperatureCharacteristics of Permafrost Subgrade[J].China Journalof Highway and Transport,2006,19(1):12-16,22.
[12]司剑锋.季节性冻土地区保温护道的设置原则[J].铁道标准设计,2008,(2):26-28.SI Jian-feng.The Design Principles of Insulating Berm onSeasonal Frozen Region[J].Railway Standard Design,2008,(2):26-28.
[13]许健,牛富俊,牛永红,等.季节冻土区保温路基设计参数[J].土木建筑与环境工程,2009,31(3):83-89.XU Jian,NIU Fu-jun,NIU Yong-hong,et al.The De-sign Parameter of Roadbed with Insulation in SeasonalFrozen Ground[J].Journal of Civil,Architectural&En-vironmental Engineering,2009,31(3):83-89.
[14]徐学祖,邓友生.冻土中水分迁移的试验研究[M].北京:科学出版社,1991.
[15]安维东.冻土的温度水分应力及其相互作用[M].兰州:兰州大学出版社,1990.
[16]铁道第一勘察设计院.沈哈客运专线D3K690+700~D3K693+000地基处理及路堤坡面防护工程地质勘察报告[R].西安:铁道第一勘察设计院,2006.
[17]铁道第一勘察设计院.哈达客运专线沈哈段季节性路基防护设计[R].西安:铁道第一勘察设计院,2007.
[18]魏智.中国东北地区多年冻土退化及漠河—大庆原油管道沿线冻土工程地质条件变化预报研究[D].兰州:中国科学院,2008:73-75.
[19]朱林楠.高原冻土区不同下垫面的附面层研究[J].冰川冻土,1988,10(1):8-14.ZHU Lin-nan.Study of the Adherent Layer on DifferentTypes of Ground in Permafrost Regions on the Qinghai-Tibet Plateau[J].Journal of Glaciology and Geocryology,1988,10(1):8-14.
[20]陈晓东,金旭,管彦武,等.长春地区地表温度日变、年变对地温测量的影响[J].地球物理学进展,2006,21(3):1008-1011.CHEN Xiao-dong,JIN Xu,GUAN Yan-wu,et al.The In-fluence of Daily and Annual Variation of the Surface Tem-perature on Near-surface Temperature Survey[J].Pro-gress in Geophysics,2006,21(3):1008-1011.
[21]王钧.中国地温分布的基本特征[M].北京:地震出版社,1990.
[22]徐学组,陶兆祥,傅素兰.典型融冻土的热学性质[M]//中国科学院兰州冰川冻土沙漠研究所.中国科学院兰州冰川冻土沙漠所集刊(第2号).北京:科学出版社,1981:104-112.
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