冻融循环作用下伊犁黄土性质劣化特征及其对滑坡稳定性的影响

张全 张艳阳 张紫昭 朱建华 陈伟楠

张全, 张艳阳, 张紫昭, 等. 2023. 冻融循环作用下伊犁黄土性质劣化特征及其对滑坡稳定性的影响[J]. 工程地质学报, 31(4):1319-1332. doi: 10.13544/j.cnki.jeg.2023-0168
引用本文: 张全, 张艳阳, 张紫昭, 等. 2023. 冻融循环作用下伊犁黄土性质劣化特征及其对滑坡稳定性的影响[J]. 工程地质学报, 31(4):1319-1332. doi: 10.13544/j.cnki.jeg.2023-0168
Zhang Quan, Zhang Yanyang, Zhang Zizhao, et al. 2023. Deterioration characteristics of Ili loess properties under freeze-thaw cycles and their influence on landslide stability[J]. Journal of Engineering Geology, 31(4):1319-1332. doi: 10.13544/j.cnki.jeg.2023-0168
Citation: Zhang Quan, Zhang Yanyang, Zhang Zizhao, et al. 2023. Deterioration characteristics of Ili loess properties under freeze-thaw cycles and their influence on landslide stability[J]. Journal of Engineering Geology, 31(4):1319-1332. doi: 10.13544/j.cnki.jeg.2023-0168

冻融循环作用下伊犁黄土性质劣化特征及其对滑坡稳定性的影响

doi: 10.13544/j.cnki.jeg.2023-0168
基金项目: 

国家自然科学基金项目 41967036

新疆维吾尔自治区重点研发项目 2021B03004-4

详细信息
    作者简介:

    张全(1997-),男,硕士生,主要从事地质灾害和地质环境研究工作.E-mail:xdyjszq@126.com

    通讯作者:

    张艳阳(1989-),男,硕士,实验师,主要从事地质灾害和地质环境方面的科研与教学工作.E-mail:zyy@xju.edu.cn

  • 中图分类号: P642.22

DETERIORATION CHARACTERISTICS OF ILI LOESS PROPERTIES UNDER FREEZE-THAW CYCLES AND THEIR INFLUENCE ON LANDSLIDE STABILITY

Funds: 

the National Natural Science Foundation of China 41967036

the Key R&D Projects of Xinjiang Uygur Autonomous Region 2021B03004-4

  • 摘要: 新疆伊犁地区作为我国西北地区气候较敏感区域之一,地质灾害较发育,且地质灾害具有危险性严重、危害程度大、成灾速度快等特点,对社会经济发展影响巨大。为加强地质灾害防治,构建安全的生产生活环境,本文以伊犁地区新源县阿勒马勒镇黄土滑坡为研究对象,综合利用野外地质调查、现场取样、室内试验分析等方法,分析了该地区黄土在冻融循环作用下其强度变化的特征以及对滑坡稳定性的影响。结果表明,随着冻融循环次数的增加,滑坡土体强度出现不同程度劣化,与此同时,滑坡稳定性变化趋势也与土体强度劣化趋势一致。分析认为,在冻融循环作用下,黄土空间结构出现不同程度破坏,造成土颗粒级配及接触类型发生变化,使得土体强度出现不同程度的衰减。滑坡整体稳定性受冻融作用的影响而产生变化,在经历3次冻融循环以后,滑坡稳定性发生突变,之后滑坡长期处于蠕滑状态。在此过程中,黄土滑坡变形失稳区域主要集中在滑坡浅层,变形贯穿区域仅限于上层冻结区域土层,不易出现中深层滑坡,滑坡变形程度较轻。研究成果可为新疆伊犁地区地质灾害防灾减灾提供参考价值,也可为类似地区的黄土滑坡地质灾害研究提供参考。
  • 图  1  研究区月平均降水量及蒸发量统计图

    Figure  1.  Monthly average precipitation and evaporation statistics for the study area

    图  2  HP7滑坡剖面示意图

    Figure  2.  Schematic diagram of HP7 landslide profile

    图  3  研究区滑坡

    Figure  3.  Landslides in the study area

    图  4  滑坡前缘泥石流沟谷

    Figure  4.  Landslide foreshore debris flow gull

    图  5  成灾模式示意图

    Figure  5.  Diagram of formation patterns

    图  6  网状剥落

    Figure  6.  Reticulated spalling

    图  7  层状及带状剥落

    Figure  7.  Laminar and band spalling

    图  8  块状剥落

    Figure  8.  Block spalling

    图  9  硬质壳体

    Figure  9.  Rigid casing

    图  10  层状冰晶体

    Figure  10.  Stratified ice crystals

    图  11  网状冰晶体

    Figure  11.  Reticulated ice crystals

    图  12  塔式构造

    Figure  12.  Tower construction

    图  13  坡脚处泥流

    Figure  13.  Mudflow at the foot of the slope

    图  14  现场取样照片

    Figure  14.  Site sampling photos

    图  15  0次冻融循环后双曲线切线图

    Figure  15.  Hyperbolic tangent after 0 freeze-thaw cycle

    图  16  1次冻融循环后双曲线切线图

    Figure  16.  Hyperbolic tangent after 1 freeze-thaw cycle

    图  17  3次冻融循环后双曲线切线图

    Figure  17.  Hyperbolic tangent after 3 freeze-thaw cycles

    图  18  5次冻融循环后双曲线切线图

    Figure  18.  Hyperbolic tangent after 5 freeze-thaw cycles

    图  19  7次冻融循环后双曲线切线图

    Figure  19.  Hyperbolic tangent after 7 freeze-thaw cycles

    图  20  10次冻融循环后双曲线切线图

    Figure  20.  Hyperbolic tangent after 10 freeze-thaw cycles

    图  21  HP7滑坡地质模型图

    Figure  21.  Map of the HP7 landslide geological model

    图  22  0次冻融循环斜坡稳定性分析

    Figure  22.  Slope stability analysis after 0 freeze-thaw cycle

    图  23  1次冻融循环斜坡稳定性分析

    Figure  23.  Slope stability analysis after 1 freeze-thaw cycle

    图  24  3次冻融循环斜坡稳定性分析

    Figure  24.  Slope stability analysis after 3 freeze-thaw cycles

    图  25  5次冻融循环斜坡稳定性分析

    Figure  25.  Slope stability analysis after 5 freeze-thaw cycles

    图  26  7次冻融循环斜坡稳定性分析

    Figure  26.  Slope stability analysis after 7 freeze-thaw cycles

    图  27  10次冻融循环斜坡稳定性分析

    Figure  27.  Slope stability analysis after 10 freeze-thaw cycles

    图  28  冻融循环斜坡稳定系数演化曲线图

    Figure  28.  Evolution of slope stability coefficients for freeze-thaw cycles

    表  1  Duncan-Chang双曲线模型分析参数表

    Table  1.   Table of parameters for Duncan-Chang hyperbolic model analysis

    冻融循环次数 含水率/% a Ei (σ1-σ3)ult b Rf (σ1-σ3)f
    0 14 0.000 01 100 000 99.1 0.0089 1 99.1
    0.000 01 100 000 173.7 0.0058 1 173.11
    0.000 008 125 000 219.4 0.0046 1.07 235.32
    16 0.000 07 14285.71 94.2 0.01 1 94.2
    0.000 01 10 000 359.88 0.0026 0.99 356.88
    0.000 05 20 000 418.2 0.0024 0.99 415.2
    18 0.000 02 50 000 194.51 0.0033 1 194.51
    0.000 03 33333.33 392.82 0.0023 1 392.82
    0.000 04 25 000 505.71 0.0017 1 505.71
    20 0.000 08 12 500 174.98 0.0051 1.11 194.51
    0.000 04 25 000 258.48 0.0035 1.52 392.82
    0.000 03 33333.33 400.29 0.0023 1.26 505.71
    1 14 0.000 09 11 111.11 71.01 0.0134 1 71.01
    0.000 005 200 000 169.73 0.006 0.99 167.73
    0.000 005 200 000 367.6 0.0028 0.98 361.86
    16 0.0001 10 000 207.93 0.00336 1 207.93
    0.00002 50 000 215.7 0.0045 1 215.7
    0.000005 200 000 379.21 0.0027 0.99 375.21
    18 0.0001 10 000 198.87 0.0041 1 198.87
    0.00004 25 000 405.43 0.0021 1 405.43
    0.00002 50 000 710.38 0.0012 1 710.38
    20 0.00009 11111.11 157.7 0.0055 1 157.7
    0.00004 25 000 225.6 0.004 1 225.6
    0.00002 50 000 343.5 0.0028 1 343.85
    3 14 0.00009 11 111.11 96.97 0.135 1 96.97
    0.00001 100 000 158.32 0.0059 0.97 154.32
    0.000009 111111.1 372.09 0.0049 0.98 365.09
    16 0.00007 14285.71 188.51 0.0047 1 188.51
    0.00001 10 000 235.73 0.0042 991.52 233 729
    0.00005 20 000 380.98 0.0041 0.96 363.98
    18 0.00002 50 000 193.12 0.0029 1 193.12
    0.00003 33333.33 429.96 0.002 1 429.96
    0.0001 10 000 498.31 0.001 1 498.31
    20 0.00005 20 000 136.54 0.00008 1 136.54
    0.00001 10 000 221.59 0.0041 1 221.59
    0.00002 50 000 321.66 0.0029 1 321.66
    5 14 0.00006 16 666.67 96.97 0.011 1 96.97
    0.000008 125 000 157.32 0.0067 0.98 154.32
    0.000009 111111.1 366.09 0.0027 1 365.09
    16 0.00009 11111.11 168.9 0.0052 1 168.9
    0.00003 33333.33 271.97 0.0034 1 271.97
    0.0000008 1 250 000 302.34 0.0036 0.99 299.34
    18 0.0001 10 000 181.96 0.0046 1 181.96
    0.00003 33333.33 473.07 0.0018 1 473.07
    0.00001 10 000 625.24 0.0015 1 625.24
    20 0.0001 10 000 127.54 0.007 0.97 127.54
    0.000 03 33333.33 299.8 0.0031 1 299.8
    0.00002 50 000 332.37 0.0028 1 332.37
    7 14 0.00004 25 000 85.94 0.001 1 85.94
    0.00002 50 000 284.34 0.0034 1 284.4
    0.000004 250 000 334.49 0.003 1 334.49
    16 0.0001 10 000 184.6 0.004 1 184.6
    0.00001 100 000 291.2 0.0033 0.98 285.76
    0.00002 50 000 344 0.0039 0.98 338.8
    18 0.00007 14285.71 251.66 0.0033 1 251.66
    0.00002 50 000 420.86 0.002 1 420.86
    0.00001 10 000 635.99 0.0015 1 635.39
    20 0.00007 14285.71 165.85 0.0055 1 165.85
    0.00004 25 000 265.83 0.0035 1 265.83
    0.00002 50 000 383.79 0.0025 1 383.79
    10 14 0.000 03 33333.33 77.33 0.408 1 77.33
    0.000 03 33333.33 276.74 0.0033 1 276.74
    0.000007 142857.1 406.53 0.0024 1 406.3
    16 0.00007 14285.71 149.83 0.006 1 149.83
    0.00002 50 000 283.31 0.0034 1 283.31
    0.000002 500 000 306.8 0.0036 0.99 303.12
    18 0.0001 10 000 199.86 0.0036 1 199.86
    0.00001 10 000 399.23 0.0024 1 399.23
    0.00002 50 000 498.22 0.0018 1 498.22
    20 0.0002 5000 173.71 0.0044 1 173.71
    0.00004 25 000 261.18 0.0035 1 261.18
    0.00001 10 000 302.37 0.0032 1 302.37
    下载: 导出CSV

    表  2  坡体岩层力学参数表

    Table  2.   Table of mechanical parameters of the slope rock formations

    岩层 冻融循环次数 重度/N·m-3 黏聚力/kPa 内摩擦角/(°)
    表层冻融层 0 19.21 32.77 34.89
    1 19.21 32.87 34.68
    3 19.21 29.37 32.67
    5 19.21 34.55 32.76
    7 19.21 45.94 30.26
    10 19.21 22.7 34.09
    粉土 19.92 20.43 22.98
    风化层 15.01 6.88 23.32
    下载: 导出CSV

    表  3  滑坡稳定状态划分表

    Table  3.   Table of landslide stability state classification

    滑坡稳定系数Fs Fs<1.0 1.0≤Fs<1.1 1.1≤Fs<1.2 Fs≥1.2
    滑坡稳定状态 不稳定 欠稳定 基本稳定 稳定
    下载: 导出CSV
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  • 收稿日期:  2023-04-28
  • 修回日期:  2023-07-28
  • 刊出日期:  2023-08-25

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