韧性锚杆对边坡支护作用的模型试验研究

陈友东 周昌 张凯恒

陈友东, 周昌, 张凯恒. 2023. 韧性锚杆对边坡支护作用的模型试验研究[J]. 工程地质学报, 31(4) : 1418-1428. doi:10.13544/j.cnki.jeg. 2023-0232
引用本文: 陈友东, 周昌, 张凯恒. 2023. 韧性锚杆对边坡支护作用的模型试验研究[J]. 工程地质学报, 31(4) : 1418-1428. doi:10.13544/j.cnki.jeg. 2023-0232
Chen Youdong, Zhou Chang, Zhang Kaiheng. 2023. Model test of supporting effect of resilient anchor cables on slope[J]. Journal of Engineering Geology, 31(4) : 1418-1428. doi: 10.13544/j.cnki.jeg.2023-0232
Citation: Chen Youdong, Zhou Chang, Zhang Kaiheng. 2023. Model test of supporting effect of resilient anchor cables on slope[J]. Journal of Engineering Geology, 31(4) : 1418-1428. doi: 10.13544/j.cnki.jeg.2023-0232

韧性锚杆对边坡支护作用的模型试验研究

doi: 10.13544/j.cnki.jeg.2023-0232
基金项目: 

国家自然科学基金 42207169

新疆维吾尔自治区重点研发计划项目 2021B03004-3

江苏省自然科学基金 BK20221126

详细信息
    作者简介:

    陈友东(1996-),男,硕士生,主要从事工程地质与岩土工程方面的科研工作. E-mail:15851839011@163.com

    通讯作者:

    周昌(1993-),男,博士,讲师,硕士生导师,主要从事工程地质方面的科研与教学工作. E-mail:changzhou@cumt.edu.cn

  • 中图分类号: P642.22

MODEL TEST OF SUPPORTING EFFECT OF RESILIENT ANCHOR CABLES ON SLOPE

Funds: 

National Natural Science Foundation of China 42207169

Key R&D Program of Xinjiang Uygur Autonomous Region 2021B03004-3

Natural Science Foundation of Jiangsu Province BK20221126

  • 摘要: 滑坡是世界上分布最广、危害最严重的地质灾害类型。降雨等因素作用下滑坡沿着滑动面发生剪切大变形,造成抗滑结构发生剪切破坏,然而目前抗滑结构设计未能充分考虑滑坡剪切大变形的静态、刚性设计,亟需开展滑坡-韧性锚固体系演化机理的深入研究。本文基于塑性变形理论提出了一种韧性锚固结构,建立了其力学模型,并以开挖后种蜂场滑坡为原型,设计了模型试验,对比分析了有无锚杆加固下边坡体变形、土压力等多源数据变化规律,结果发现:(1)韧性锚杆加固作用下边坡内测点侧向应力分布与曲线形态发生显著变化,边坡抗滑力增大了20%。(2)边坡剪切大变形过程中,韧性锚杆轴力呈周期性变化,与理论相符。(3)韧性锚杆明显减少了边坡位移及变形破坏范围,滑动范围减少了约25%。
  • 图  1  韧性锚杆结构示意图

    Figure  1.  Structure diagram of the resilient anchor cable

    图  2  韧性锚杆工作示意图

    Figure  2.  Working process of anchor cable

    图  3  3D打印锚杆

    Figure  3.  Similar anchor cable

    图  4  防治区地质剖面图

    Figure  4.  Geological profile of the slope

    图  5  模型试验装置

    Figure  5.  Physical model device

    图  6  传感器布置图

    Figure  6.  Monitoring system

    图  7  未加固边坡变形破坏规律

    a. 加载位移0mm;b. 加载位移47mm;c. 加载位移94mm;d. 加载位移141mm;e. 加载位移188mm

    Figure  7.  Deformation of unreinforced model

    图  8  不同时间、部位边坡变形破坏图

    a. 加载位移0mm;b. 加载位移47mm;c. 加载位移94mm;d. 加载位移141mm;e. 加载位移188mm;f. 后缘锚杆变形破坏图

    Figure  8.  Deformation characteristics of reinforced model at different time and parts

    图  9  加载力曲线

    Figure  9.  Loading force curve

    图  10  模型上(a)、中(b)和下(c、d)土压力

    a. 后缘(T1列)模型土压力曲线;b. T2列模型土压力曲线;c. T3列模型土压力曲线;d. T4列模型土压力曲线

    Figure  10.  Soil pressures of two models at the upper(a),middle(b) and downside(c,d)

    图  11  锚杆轴力曲线

    Figure  11.  Axial force of anchor cables

    图  12  不同时间下模型坡表位移云图

    a. 未加固模型坡表位移云图(加载位移10mm);b. 破坏后未加固模型坡表位移;c. 加固模型坡表位移(10mm);d. 破坏后加固模型坡表位移

    Figure  12.  Surface displacement of reinforced model at different time

    表  1  韧性锚固结构参数

    Table  1.   Rock bolt structure parameters

    锚固结构 总长度/m 锚固段长度/m 泊松比 弹性模量/GPa
    原型 30 7.2 0.27 210
    模型 0.5 0.12 0.27 3.5
    下载: 导出CSV

    表  2  边坡模型相似系数取值

    Table  2.   Value of similarity coefficient of slope model

    几何相似比Cl 密度相似比Cρ 应力相似比Cσ 黏聚力相似比Cc 内摩擦角相似Cφ
    60 1 60 60 1
    下载: 导出CSV

    表  3  边坡岩土体基本参数

    Table  3.   Parameters of rock and soil

    密度ρ /g·m-3 黏聚力c /kPa 内摩擦角φ /(°)
    原型 粉土层 1.87 26 22
    卵石土层 2.23 4 40
    模型 粉土层 1.87 0.43 22
    卵石土层 2.23 0.07 40
    下载: 导出CSV

    表  4  相似材料参数

    Table  4.   Similar material parameters

    密度ρ /g·m-3 黏聚力c /kPa 内摩擦角φ /(°)
    粉土层 1.87 2.1 23
    卵石土层 2.22 0.3 40
    下载: 导出CSV
  • Chang X J,Wang D W,Tang Y Q. 2010. Simulation experiments of the rainfall-induced landslides in China insights and foresights[J]. Sedimentary Geology and Tethyan Geology,30 (1): 98-102.
    Chen C H. 2019. Research on a new type of geotechnical bolting in geotechnical engineering[J]. Theoretical Research in Urban Construction, (10): 72.
    Dai L P, Pan Y S, Wang A W. 2018. Study of the energy absorption performance of an axial splitting component for anchor bolts under static loading[J]. Tunnelling & Underground Space Technology, 81 : 176-186.
    Hao Y, Wu Y, Ranjith P G, et al. 2020. A novel energy-absorbing rock bolt with high constant working resistance and long elongation: Principle and static pull-out test[J]. Construction and Building Materials, 243(3): 118231.
    He M C, Gong W L, Wang J, et al. 2014. Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance[J]. International Journal of Rock Mechanics and Mining Sciences, 67 : 29-42. doi: 10.1016/j.ijrmms.2014.01.007
    He M C, Li C, Gong W L, et al. 2015. Elongation and impacting experimental system for bolts with constant resistance and large deformation and finite element analysis[J]. Chinese Journal of Rock Mechanics and Engineering, 34 (11): 2179-2187.
    He M C, Li C, Gong W L, et al. 2016. Support principles of NPR bolts/cables and control techniques of large deformation[J]. Chinese Journal of Rock Mechanics and Engineering, 35 (8): 1513-1529.
    Hu H Q, Huang Y, Xiong M, et al. 2021. Investigation of seismic behavior of slope reinforced by anchored pile structures using shaking table tests[J]. Soil Dynamics and Earthquake Engineering, 150(4-6): 106900.
    Hu J, He M C, Li Z H, et al. 2020. Numerical study on NPR cable-rock interaction using 3D discrete-continuous coupling method[J]. Engineering Mechanics, 37 (7): 27-34.
    Li C C, Doucet C. 2012. Performance of D-bolts under dynamic loading[J]. Rock Mechanics & Rock Engineering, 45 (2): 193-204.
    Li C C. 2012. Performance of D-bolts under static loading[J]. Rock Mechanics and Rock Engineering, 45 (2): 183-192. doi: 10.1007/s00603-011-0198-6
    Liu Y J, Wu J H. 2021. Application of geotechnical anchorage technology in slope treatment of geotechnical engineering[J]. Henan Science Technology, 40 (12): 100-102.
    Tao Z G, Ren S L, Wang F N, et al. 2020. Research on NPR anchor cable support scheme for large deformation of surrounding rock in high-ground stress soft rock tunnel[J]. Tunnel Construction, 40 (S2): 82-92.
    Tao Z G, Zhu C, He M C, et al. 2021. A physical modeling-based study on the control mechanisms of Negative Poisson's ratio anchor cable on the stratified toppling deformation of anti-inclined slopes[J]. International Journal of Rock Mechanics and Mining Sciences, 138: 104632. doi: 10.1016/j.ijrmms.2021.104632
    Wang G, Wu X Z, Jiang Y J, et al. 2013. Quasi-static laboratory testing of a new rock bolt for energy-absorbing applications[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 38 : 122-128.
    Ye S H, Zhao Z F, Zhu Y P. 2019. Large-scale shaking table experiment of loess slope supported by frame anchors[J]. Rock and Soil Mechanics, 40 (11): 4240-4248.
    Zhou C, Hu Y J, Ting X, et al. 2023. Analytical model for reinforcement effect and load transfer of pre-stressed anchor cable with bore deviation[J]. Construction and Building Materials, 379(5): 131219.
    Zhou C, Huang C, Chen Y D, et al. 2023. Performance of a novel resistant rock bolt with periodic energy absorption and release: theory and experiment[J]. Acta Geotechnica, doi: 10.1007/s11440-023-01943-7.
    Zhou C, Huang C, Chen Y D, et al. 2023. Development of a novel resilient anchor cable and its large shear deformation performance[J]. International Journal of Rock Mechanics and Mining Sciences, 163(6): 105293.
    常晓军, 王德伟, 唐业旗. 2010. 中国滑坡降雨试验的研究现状与发展趋势[J]. 沉积与特提斯地质, 30 (1): 98-102. https://www.cnki.com.cn/Article/CJFDTOTAL-TTSD201001018.htm
    陈慈航. 2019. 岩土工程中的新型岩土锚杆术研究[J]. 城市建设理论研究(电子版), (10): 72. https://www.cnki.com.cn/Article/CJFDTOTAL-CSJL201910070.htm
    何满潮, 李晨, 宫伟力, 等. 2016. NPR锚杆/索支护原理及大变形控制技术[J]. 岩石力学与工程学报, 35 (8): 1513-1529. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201608001.htm
    何满潮, 李晨, 宫伟力. 2015. 恒阻大变形锚杆冲击拉伸实验及其有限元分析[J]. 岩石力学与工程学报, 34 (11): 2179-2187. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201511002.htm
    胡杰, 何满潮, 李兆华, 等. 2020. 基于三维离散-连续耦合方法的NPR锚索-围岩相互作用机理研究[J]. 工程力学, 37 (7): 27-34. https://www.cnki.com.cn/Article/CJFDTOTAL-GCLX202007006.htm
    刘永军, 吴俊浩. 2021. 岩土锚固技术在岩土工程边坡治理中的应用[J]. 河南科技, 40 (12): 100-102. https://www.cnki.com.cn/Article/CJFDTOTAL-HNKJ202112040.htm
    陶志刚, 任树林, 王丰年, 等. 2020. 高地应力软岩隧道围岩大变形NPR锚索控制方法研究[J]. 隧道建设(中英文), 40 (S2): 82-92. https://www.cnki.com.cn/Article/CJFDTOTAL-JSSD2020S2011.htm
    叶帅华, 赵壮福, 朱彦鹏. 2019. 框架锚杆支护黄土边坡大型振动台模型试验研究[J]. 岩土力学, 40 (11): 4240-4248. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201911014.htm
  • 加载中
图(12) / 表(4)
计量
  • 文章访问数:  102
  • HTML全文浏览量:  9
  • PDF下载量:  39
  • 被引次数: 0
出版历程
  • 收稿日期:  2023-05-31
  • 修回日期:  2023-07-24
  • 刊出日期:  2023-08-25

目录

    /

    返回文章
    返回