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川藏寒区道路边坡涎流冰防治措施试验研究

赵文 刘亚雄 吉安娜 高文杰 王国生

赵文,刘亚雄,吉安娜,等. 川藏寒区道路边坡涎流冰防治措施试验研究[J]. 水文地质工程地质,2023,50(1): 122-131 doi:  10.16030/j.cnki.issn.1000-3665.202203034
引用本文: 赵文,刘亚雄,吉安娜,等. 川藏寒区道路边坡涎流冰防治措施试验研究[J]. 水文地质工程地质,2023,50(1): 122-131 doi:  10.16030/j.cnki.issn.1000-3665.202203034
ZHAO Wen, LIU Yaxiong, JI Anna, et al. Experimental study on prevention measures of extruded ice on highway subgrade slope in Sichuan-Tibet cold region[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 122-131 doi:  10.16030/j.cnki.issn.1000-3665.202203034
Citation: ZHAO Wen, LIU Yaxiong, JI Anna, et al. Experimental study on prevention measures of extruded ice on highway subgrade slope in Sichuan-Tibet cold region[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 122-131 doi:  10.16030/j.cnki.issn.1000-3665.202203034

川藏寒区道路边坡涎流冰防治措施试验研究

doi: 10.16030/j.cnki.issn.1000-3665.202203034
详细信息
    作者简介:

    赵文(1975-),男,博士,副教授,主要从事边坡工程研究。E-mail:wenzhao@swjtu.cn

    通讯作者:

    吉安娜(1999-),女,硕士研究生,主要从事边坡工程研究。E-mail:2580151406@qq.com

  • 中图分类号: U213.1

Experimental study on prevention measures of extruded ice on highway subgrade slope in Sichuan-Tibet cold region

  • 摘要: 涎流冰是川藏寒区道路工程常见病害,严重威胁道路建设及运营安全。防止地下水出露地表或者地下水位过高可减缓或消除涎流冰病害。野外调查和卫图判识表明川藏寒区涎流冰以溢流型为主。通过室内物理模拟试验研究采用含砾粗砂或卵石换填疏导地下水以及铺设防水土工布隔水对涎流冰的防治效果。试验表明:当冻结深度大于地下水位埋深时会逐渐形成涎流冰;采用含砾粗砂或卵石作为换填渗流层,加快地下水排泄,可有效减少孔隙水压力,相对于未处治边坡,涎流冰体积分别减少85.4%和93.9%,孔隙水压力分别减少46.2%和58.1%;采用防水土工布阻隔地下水,涎流冰面积减少97.5%,但孔隙压力会增加。考虑到川藏交通廊道区卵(碎)石材料充足,推荐采用渗透性良好的卵(碎)石作为换填层,加强地下水疏导,并在换填层上铺设防水土工布隔水。研究成果可为川藏地区交通道路涎流冰防治提供参考。
  • 图  1  川藏交通廊道涎流冰调查点分布图

    Figure  1.  Distribution of extruded ice along Sichuan—Tibet Traffic Corridor

    图  2  涎流冰主要类型

    Figure  2.  Main types of extruded ice

    图  3  涎流冰分布统计

    Figure  3.  Statistics of extruded ice

    图  4  试验模型及传感器布置剖面

    Figure  4.  Model and sensor layout section of the experiment

    图  5  试验装置

    Figure  5.  Test apparatus

    图  6  试验方案

    Figure  6.  Test scheme

    图  7  边坡模型填筑

    Figure  7.  Slope model construction

    图  8  含砾粗砂换填试验边坡涎流冰分布

    Figure  8.  Distribution of extruded ice in gravel-bearing coarse sand backfill slop experiment

    图  9  含砾粗砂换填试验坡体温度

    Figure  9.  Temperature in gravel-bearing coarse sand backfill slop experiment

    图  10  含砾粗砂换填试验孔隙水压力

    Figure  10.  Pore water pressure in gravel-bearing coarse sand backfill slope experiment

    图  11  卵石换填试验边坡涎流冰分布

    Figure  11.  Distribution of extruded ice in pebble backfill slope experiment

    图  12  卵石换填试验坡体温度

    Figure  12.  Temperature in pebble backfill slope experiment model

    图  13  卵石换填试验孔隙水压力

    Figure  13.  Pore water pressure in pebble backfill slope experiment model

    图  14  铺设隔水层试验边坡涎流冰分布

    Figure  14.  Distribution of extruded ice in the experiment model with waterproof layer

    图  15  铺设隔水层坡体温度

    Figure  15.  Temperature in the experiment model with waterproof layer

    图  16  铺设隔水层孔隙水压力

    Figure  16.  Pore water pressure in the experiment model with waterproof layer

    图  17  未处治边坡中的冻结土体

    Figure  17.  Frozen soil in the untreated slope

    图  18  防治措施示意图

    Figure  18.  Schematic diagram of prevention measures

    表  1  涎流冰防治效果对比

    Table  1.   Comparison of prevention effect of extruded ice

    模型试验最大孔隙水压力冻结体体积涎流冰体积
    未处治边坡/kPa处治边坡/kPa变化率/%未处治边坡/cm3处治边坡/cm3变化率/%未处治边坡/cm3处治边坡/cm3变化率/%
    含砾粗砂换填13.007.00−46.2014645.166423.04−56.104393.50642.30−85.40
    卵石换填15.506.50−58.1015494.413334.30−78.504338.40266.70−93.90
    铺设隔水层12.7025.1097.6016310.492013.88−87.704077.60100.70−97.50
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-10
  • 录用日期:  2022-05-29
  • 修回日期:  2022-05-26
  • 网络出版日期:  2022-12-08
  • 刊出日期:  2023-01-13

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