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保温板在内蒙多年冻土区道路工程中的应用

张宝龙 范文

张宝龙, 范文, 2018. 保温板在内蒙多年冻土区道路工程中的应用. 地质力学学报, 24 (5): 706-713. DOI: 10.12090/j.issn.1006-6616.2018.24.05.072
引用本文: 张宝龙, 范文, 2018. 保温板在内蒙多年冻土区道路工程中的应用. 地质力学学报, 24 (5): 706-713. DOI: 10.12090/j.issn.1006-6616.2018.24.05.072
ZHANG Baolong, FAN Wen, 2018. APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA. Journal of Geomechanics, 24 (5): 706-713. DOI: 10.12090/j.issn.1006-6616.2018.24.05.072
Citation: ZHANG Baolong, FAN Wen, 2018. APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA. Journal of Geomechanics, 24 (5): 706-713. DOI: 10.12090/j.issn.1006-6616.2018.24.05.072

保温板在内蒙多年冻土区道路工程中的应用

doi: 10.12090/j.issn.1006-6616.2018.24.05.072
基金项目: 

西部交通建设科技项目 200631800006

详细信息
    作者简介:

    张宝龙(1977-), 男, 博士, 教授级高级工程师, 研究方向为边坡与地基工程。E-mail:40952734@qq.com

  • 中图分类号: U418.5

APPLICATION OF INSULATION BOARD IN ROAD ENGINEERING IN PERMAFROST REGIONS OF INNER MONGOLIA

  • 摘要: 根据博—牙高速沿线气象工程地质资料、观测资料、设计资料,借助有限元软件构建了路基温度场数值计算模型,着重对不同路基填筑高度条件下XPS板对温度场的影响进行了研究。研究发现:路基填筑高度的增加和XPS保温板的应用对冻土都起到了积极的保护作用,相同路堤填筑高度下,道路运营到第20年时,XPS保温板路基多年冻土温度比碎石路基降低了约0.19℃;XPS保温板的存在使得冻土上限上移更加明显,相同路基高度下,冻土上限平均抬升量约为1.23 m,在规范规定年限内,XPS保温板路基的冻土上限均位于换填碎石中;但XPS保温板的存在加剧了阴阳坡效应的发展,综合考虑,在本段落若采用碎石路堤建议路堤高度应保持在3 m以上;若采用XPS保温板路基,建议路堤高度不超过2 m。

     

  • 图  1  K198+000点处地层柱状图

    Figure  1.  Stratum histogram at K198+000 point

    图  2  路基路面结构

    Figure  2.  Subgrade and pavement structure

    图  3  不同路基高度情况下温度场分布

    Figure  3.  Distribution of temperature fields with different subgrade heights

    图  4  不同高度碎石路堤路中温度剖面

    Figure  4.  Temperature profile for crushed rock subgrade with different heights

    图  5  3 m高XPS碎石路堤路中温度剖面

    Figure  5.  Temperature profile for 3 m-high crushes rock subgrade with XPS insulation board

    图  6  不同路基高度下多年冻土上限变化过程

    Figure  6.  The variation process of permafrost upper limit under different subgrade heights

    表  1  材料热参数

    Table  1.   Thermal parameters of subgrade and pavement materials

    结构层 密度ρ/(kg/m3) 融土比热Cu/(J/(kg·℃)) 冻土比热Cf/(J/(kg·℃)) 融土导热系数λu/(W/(m·℃)) 冻土导热系数λf/(W/(m·℃))
    沥青路面 2358 1680 1680 1.05 1.05
    水稳碎石 2277 920 920 1.5 1.5
    水稳砂砾 2233 920 920 2.04 2.04
    砂垫层 1500 1010 1010 0.58 0.58
    路堤碎石 1900 1730 1580 1.06 1.6
    换填碎石 1900 1730 1580 1.06 1.6
    XPS保温板 45 5346 5346 0.029 0.029
    泥炭土 800 3814 2425 0.8 1.55
    季冻土 1600 2208 1900 0.77 1.12
    冻土 1900 1800 1600 0.93 1.16
    下载: 导出CSV

    表  2  路基土焓值

    Table  2.   Enthalpy of subgrade soil

    温度/(℃) -10 -5 -2 -1 -0.5 0 15
    泥炭土 wu/% 3 4.5 7.3 10.7 16.2 50 50
    H/(MJ/m3) 19.40 23.41 30.91 31.82 46.53 136.98 182.75
    季冻土 wu/% 2.7 4.18 7.46 11.6 13.8 22 22
    H/(MJ/m3) 30.40 38.32 55.88 78.03 89.81 133.69 204.35
    多年冻土 wu/% 0.29 0.45 0.78 1.19 1.82 10 10
    H/(MJ/m3) 30.4 39.28 45.99 49.93 54.31 101.53 132.46
    下载: 导出CSV

    表  3  太阳日辐射总量和长波有效辐射量

    Table  3.   Total daily solar radiation and long wave effective radiation

    月份 1 2 3 4 5 6 7 8 9 10 11 12
    太阳日总辐射量Q/(MJ/m2·d) 4.17 7.17 13.67 16.67 19.5 20.83 19.5 17.0 10.93 6.67 3.67 2.83
    有效辐射F/(MJ/m2·d) 2.67 3.33 4.17 3.00 3.00 3.00 2.83 3.00 2.67 2.67 2.33 1.53
    下载: 导出CSV

    表  4  坡面系数取值

    Table  4.   Slope coefficient

    月份 北偏西
    阳坡 阴坡
    1 1.61 0.3
    2 1.43 0.39
    3 1.24 0.5
    4 1.07 0.68
    5 0.93 0.78
    6 0.9 0.81
    7 0.93 0.78
    8 1.07 0.68
    9 1.24 0.5
    10 1.43 0.39
    11 1.61 0.3
    12 1.72 0.28
    下载: 导出CSV

    表  5  博克石地区月蒸发量

    Table  5.   Monthly evaporation in Bokeshi

    月份 1 2 3 4 5 6 7 8 9 10 11 12
    蒸发量/mm 10.1 22.6 60.0 145.8 246.2 184.7 166.6 130.6 117.4 73.7 24.5 9.3
    下载: 导出CSV

    表  6  不同高度碎石路堤多年冻土温度

    Table  6.   Permafrost temperature for crushed rock subgrade with different heights

    多年冻土温度/℃ 1a 5a 10a 15a 20a
    碎石路堤-1 m -3.05 -1.38 -0.91 -0.71 -0.55
    碎石路堤-2 m -3.07 -1.46 -0.96 -0.78 -0.63
    碎石路堤-3 m -3.11 -1.54 -1.02 -0.84 -0.70
    碎石路堤-4 m -3.13 -1.61 -1.09 -0.89 -0.76
    下载: 导出CSV

    表  7  不同高度XPS保温板路基多年冻土温度

    Table  7.   Permafrost temperature for subgrade with XPS insulation board with different heights

    多年冻土温度/℃ 1a 5a 10a 15a 20a
    XPS路堤-1 m -3.10 -1.61 -1.07 -0.88 -0.73
    XPS路堤-2 m -3.13 -1.69 -1.16 -0.94 -0.81
    XPS路堤-3 m -3.14 -1.76 -1.25 -1.00 -0.87
    XPS路堤-4 m -3.13 -1.82 -1.33 -1.06 -0.93
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-06-01
  • 修回日期:  2018-08-13
  • 刊出日期:  2018-10-01

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