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基于室内大型剪切试验及工程地质类比法的弃渣场抗剪强度参数综合取值与稳定性研究

汪继平 汤罗圣 黄璇 王云安

汪继平, 汤罗圣, 黄璇, 王云安. 基于室内大型剪切试验及工程地质类比法的弃渣场抗剪强度参数综合取值与稳定性研究[J]. 地质科技通报, 2022, 41(4): 266-273. doi: 10.19509/j.cnki.dzkq.2022.0120
引用本文: 汪继平, 汤罗圣, 黄璇, 王云安. 基于室内大型剪切试验及工程地质类比法的弃渣场抗剪强度参数综合取值与稳定性研究[J]. 地质科技通报, 2022, 41(4): 266-273. doi: 10.19509/j.cnki.dzkq.2022.0120
Wang Jiping, Tang Luosheng, Huang Xuan, Wang Yun'an. Determination of shear strength parameters and stability analysis of waste disposal area using laboratory large-scale shear testing and engineering geologic analogy method[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 266-273. doi: 10.19509/j.cnki.dzkq.2022.0120
Citation: Wang Jiping, Tang Luosheng, Huang Xuan, Wang Yun'an. Determination of shear strength parameters and stability analysis of waste disposal area using laboratory large-scale shear testing and engineering geologic analogy method[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 266-273. doi: 10.19509/j.cnki.dzkq.2022.0120

基于室内大型剪切试验及工程地质类比法的弃渣场抗剪强度参数综合取值与稳定性研究

doi: 10.19509/j.cnki.dzkq.2022.0120
基金项目: 

国家自然科学基金项目"库岸堆积层滑坡变形滞后响应机理与时效位移预测研究" 41807294

湖北省交通运输厅科技项目"基于典型示范点的高速公路边坡自动监测预警系统研究" 2018-422-1-5

湖北省交通运输厅科技项目"鄂西山区交通地质基础数据信息化集成与国土空间交通规划灾害风险评价系统" 2020-186-4-2

详细信息
    作者简介:

    汪继平(1975-), 男, 高级工程师, 主要从事高速公路建设、运营养护及管理等工作。E-mail: huanglianhua139@126.com

    通讯作者:

    汤罗圣(1984-), 男, 高级工程师, 主要从事公路地质灾害机理、监测、预警等工作。E-mail: homeandm@163.com

  • 中图分类号: P642

Determination of shear strength parameters and stability analysis of waste disposal area using laboratory large-scale shear testing and engineering geologic analogy method

  • 摘要:

    目前工程实践中弃渣场抗剪强度参数主要采用工程地质类比法进行取值, 参数误差较大, 有必要采用多种方法对弃渣场抗剪强度参数进行综合取值研究。以某公路弃渣场为工程实例, 通过室内颗分试验确定弃渣场弃渣的颗粒级配, 在此基础上采用室内大型剪切试验及工程地质类比法综合确定该弃渣的抗剪强度参数, 并以此参数计算弃渣体的稳定性。计算结果表明, 弃渣体在天然工况条件下稳定性系数为1.369, 在暴雨工况条件下稳定性系数为1.083, 弃渣场在计算工况条件下处于基本稳定-稳定状态, 与现场巡查及监测结果基本一致。说明该弃渣抗剪强度参数取值比较合理准确, 可为公路弃渣场参数取值提供参考。

     

  • 图 1  弃渣场主剖面示意图

    Figure 1.  Schematic diagram of the principal profile of the waste disposal area

    图 2  弃渣场平面示意图

    Figure 2.  Plan diagram of the waste disposal area

    图 3  弃渣场全貌图

    Figure 3.  Overall view of the waste disposal area

    图 4  原级配与替代后级配曲线

    Figure 4.  Primary and post-replacement grading curves

    图 5  室内大型剪切试验

    Figure 5.  Laboratory large-scale shear testing

    图 6  1#样品剪切应力-应变曲线

    Figure 6.  Shear stress-strain curve of sample 1#

    图 7  1#样品试验结果

    Figure 7.  Test results of sample 1#

    图 8  2#样品剪切应力-应变曲线

    Figure 8.  Shear stress-strain curve of sample 2#

    图 9  2#样品试验结果

    Figure 9.  Test results of sample 2#

    图 10  天然工况下弃渣场稳定性计算结果

    Figure 10.  Calculation results of the waste disposal area under natural working conditions

    图 11  暴雨工况下弃渣场稳定性计算结果

    Figure 11.  Calculation results of the waste disposal area under heavy rain working conditions

    图 12  弃渣场现场巡查照片

    Figure 12.  Inspection iamges of the waste disposal area

    图 13  弃渣场地表监测点累积位移-时间曲线

    Figure 13.  Cumulative displacement-time curves of surface monitoring points in the waste disposal area

    图 14  弃渣场深部位移监测点累积位移-时间曲线

    Figure 14.  Cumulative displacement-time curves of deep displacement monitoring points in the waste disposal area

    表  1  颗分试验结果

    Table  1.   Test results of the particle grading testing

    颗粒组成(筛分法) 孔径/mm 60 40 20 10 5 2
    小于该孔径质量分数/% 79.2 70.3 48.8 35 23.5 11.6
    下载: 导出CSV

    表  2  类似弃渣体抗剪强度参数值

    Table  2.   Shear strength parameters of similar waste disposal areas

    序号 弃渣场名称 c/kPa φ/(°)
    天然 饱和 天然 饱和
    1 安家岭露天矿内排土场 6.8 - 23.8 -
    2 杭长客专白力坞隧道出口弃渣场 7 - 40 -
    3 周家隧道出口弃渣场 8 4 35 32
    下载: 导出CSV

    表  3  弃渣抗剪强度综合取值

    Table  3.   Shear strength comprehensive values of the waste disposal

    序号 取值 c/kPa φ/(°)
    天然 饱和 天然 饱和
    1 室内剪切试验 - 3~5 - 28~29
    2 工程地质类比 6.8~8 4 23.8~40 32
    3 综合取值 7 3 32 28
    下载: 导出CSV

    表  4  滑坡稳定状态划分[20-21]

    Table  4.   Stable state classification of the landslide

    稳定状态 不稳定 欠稳定 基本稳定 稳定
    稳定系数Fs Fs<1.0 1.0≤Fs<1.05 1.05≤FsKs FsKs
    注:Fs为计算稳定性系数;Ks为安全系数
    下载: 导出CSV

    表  5  弃渣场稳定性评价结果

    Table  5.   Stability analyses of the waste disposal area

    计算工况 稳定性系数Fs 控制标准 稳定性状态
    天然工况 1.369 1.30 稳定
    暴雨工况 1.083 1.15 基本稳定
    下载: 导出CSV
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  • 收稿日期:  2022-01-08
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