降雨入渗条件下多级黄土高边坡稳定性分析

叶帅华 时轶磊

叶帅华, 时轶磊. 2018: 降雨入渗条件下多级黄土高边坡稳定性分析. 工程地质学报, 26(6): 1648-1656. doi: 10.13544/j.cnki.jeg.2017-552
引用本文: 叶帅华, 时轶磊. 2018: 降雨入渗条件下多级黄土高边坡稳定性分析. 工程地质学报, 26(6): 1648-1656. doi: 10.13544/j.cnki.jeg.2017-552
YE Shuaihua, SHI Yilei. 2018: STABILITY ANALYSIS OF MULTI-STAGE HIGH SLOPE WITH LOESS UNDER RAINFALL INFILTRATION. JOURNAL OF ENGINEERING GEOLOGY, 26(6): 1648-1656. doi: 10.13544/j.cnki.jeg.2017-552
Citation: YE Shuaihua, SHI Yilei. 2018: STABILITY ANALYSIS OF MULTI-STAGE HIGH SLOPE WITH LOESS UNDER RAINFALL INFILTRATION. JOURNAL OF ENGINEERING GEOLOGY, 26(6): 1648-1656. doi: 10.13544/j.cnki.jeg.2017-552

降雨入渗条件下多级黄土高边坡稳定性分析

doi: 10.13544/j.cnki.jeg.2017-552
基金项目: 

国家自然科学基金项目 51508256

国家自然科学基金项目 51768040

甘肃省建设科技攻关计划项目 JK2015-5

兰州市科技发展计划项目 2015-3-131

详细信息
    作者简介:

    叶帅华(1983-), 男, 博士, 副教授, 硕士生导师, 主要从事支挡结构、地基处理及岩土工程抗震方面的教学和研究工作.Email:yeshuaihua@163.com

  • 中图分类号: P642.22

STABILITY ANALYSIS OF MULTI-STAGE HIGH SLOPE WITH LOESS UNDER RAINFALL INFILTRATION

  • 摘要: 在西北地区进行基础工程建设,遇到了大量的多级黄土高边坡工程。边坡工程属于永久性工程,难免遇到降雨状况。降雨入渗会引起边坡土体饱和度与土体重度的变化,进而导致边坡体基质吸力与有效应力场的变化,使边坡的稳定性受到较大的影响。本文通过考虑边坡体不同深度处基质吸力随雨水入渗的变化情况,建立了渗流场与应力场的耦合计算模型,对降雨入渗条件下多级黄土高边坡的稳定性进行分析。最后,依托实际边坡工程,利用PLAXIS 3D岩土有限元软件,建立边坡稳定性计算模型,通过设置降雨量随时间的变化函数与渗流边界条件,进行降雨入渗条件下多级黄土高边坡的稳定性数值计算,并与理论分析结果进行了对比分析。根据数值计算结果可得到多级黄土高边坡在降雨入渗条件下的变形、基质吸力、有效应力、潜在滑移面以及安全系数的变化情况,从而对降雨入渗影响下多级黄土高边坡的稳定性做出分析。研究结果可为降雨入渗条件下多级黄土高边坡的稳定性的研究提供一定的指导作用。
  • 图  1  边坡三维有限元模型

    Figure  1.  The three-dimensional finite element model of slope

    图  2  监测点分布图

    Figure  2.  Distribution of monitoring points

    图  3  土的渗透性函数(a)和土-水特征曲线(b)

    a.土的渗透性;b.土-水特征曲线

    Figure  3.  Permeability function and SWCC

    图  4  不同工况下有效应力随时间变化

    a.工况二(10 mm·h-1);b.工况三(20 mm·h-1)

    Figure  4.  The effective stress changes with time under different working conditions

    图  5  不同工况下边坡吸力分布

    a.正常工况;b.工况二结束时(6 d);c.工况三结束时(3 d)

    Figure  5.  Slope suction distribution under different working conditions

    图  6  不同工况下坡面监测点水平位移

    a.工况二(10 mm·h-1);b.工况三(20 mm·h-1)

    Figure  6.  Horizontal displacement of slope surface monitoring points under different working conditions

    图  7  不同工况下坡面监测点竖向位移

    a.工况二(10 mm·h-1);b.工况三(20 mm·h-1)

    Figure  7.  Vertical displacement of slope surface monitoring points under different working conditions

    图  8  不同工况下边坡滑移面变化

    a.正常工况;b.工况二(10 mm·h-1);c.工况三(20 mm·h-1)

    Figure  8.  Slope slip surface changes in different working conditions

    表  1  土体物理力学参数

    Table  1.   Physico-mechanical parameters of soil mass

    土层 重度γ /kN·m-3 总弹性模量E /MPa 泊松比μ 黏聚力c /kPa 内摩擦角φ /(°) 界面黏结强度/kPa
    黄土 17.0 10 0.44 12 25 60
    下载: 导出CSV
  • Dong W W, Zhu H H, Sun Y J, et al. 2016. Current status and new progress on slope deformation monitoring technologies[J]. Journal of Engineering Geology, 24(6):1088-1095. http://www.en.cnki.com.cn/Article_en/CJFDTotal-GCDZ201606007.htm
    Kong Y F, Song E X, Yang J, et al. 2013. Rainfall's effect on the stability of unsaturated slope[J]. Journal of Civil Architectural and Environmental Engineering, 35(6):16-21. http://en.cnki.com.cn/Article_en/CJFDTotal-JIAN201306003.htm
    Kong Y F, Zhou M J, Song E X, et al. 2014. Slope stability analysis in consideration of rainfall influence based on PLAXIS software[J]. Hydro-Science and Engineering, 3:70-76. http://en.cnki.com.cn/Article_en/CJFDTOTAL-SLSY201403011.htm
    Li G X. 2016. Advanced soil mechanics[M]. Beijing:Tsinghua University Press:114-202.
    Li H Q, Sun H Y, Sun X M, et al. 2009. Influence of rainfall infiltration on slopes by physical model test[J]. Chinese Journal of Geotechnical Engineering, 31(4):589-594. http://www.cnki.com.cn/Article/CJFDTotal-YTGC200904020.htm
    Li Y, Wu J, Li K. 2012. Saturated-unsaturated seepage analysis based on FLAC3D[J]. Rock and Soil Mechanics, 33(2):617-622. http://en.cnki.com.cn/Article_en/CJFDTOTAL-YTLX201202049.htm
    Lu N, Likos W J. 2012. Unsaturated soil mechanics[M]. Wei C F, Hou L, Jian W X, translation. Beijing: High Education Press: 195-291.
    Ping Y, Liu M Z, Zheng S H. 2004. Stability analysis of expansive soil slope with rainfall infiltration[J]. Chinese Journal of Rock Mechanics and Engineering, 23(1):4478-4484. http://d.old.wanfangdata.com.cn/Periodical/jtysgcxb201402005
    Tan L, Wei C F, Tian H H, et al. 2017. Experimental study on characteristics of pore water distribution and water-holding capacity of soil[J]. Journal of Engineering Geology, 25(1):73-79. http://en.cnki.com.cn/Article_en/CJFDTotal-GCDZ201701010.htm
    Tan W H, Qu S J, Gao D Q, et al. 2010. Effects of rain infiltration on slope stability[J]. Journal of Wuhan University of Technology, 32(15):39-43. http://d.old.wanfangdata.com.cn/OAPaper/oai_doaj-articles_871a8d902c3e8f6230f0f6dcc1685fbb
    Wang G, Sun P, Wu L Z, et al. 2017. Experimental study on mechanism of shallow loess landslides induced by rainfall[J]. Journal of Engineering Geology, 25(5):1252-1263. http://en.cnki.com.cn/Article_en/CJFDTotal-GCDZ201705010.htm
    Wang R, Zhang G, Zhang J M. 2010. Centrifuge modeling of rainfall-induced deformation of slopes with weak layers[J]. Chinese Journal of Geotechnical Engineering, 32(10):1582-1587. http://en.cnki.com.cn/Article_en/CJFDTOTAL-YTGC201010018.htm
    Wang X Q, Zhang Y X, Zou W L, et al. 2010. Numerical simulation for unsaturated road-embankment deformation and slope stability under rainfall infiltration[J]. Rock and Soil Mechanics, 31(11):3640-3645. http://en.cnki.com.cn/Article_en/CJFDTOTAL-YTLX201011047.htm
    Wu C F, Zhu X R, Yin X T, et al. 2008. Analysis of soil slope's transient stability under intensive rainfall[J]. Rock and Soil Mechanics, 29(2):386-391. http://en.cnki.com.cn/Article_en/CJFDTOTAL-YTLX200802030.htm
    Wu J J, Wang C H, Li G X. 2004. Influence of matric suction in unsaturated soils on slope stability[J]. Rock and Soil Mechanics, 25(5):732-736. http://en.cnki.com.cn/Article_en/CJFDTOTAL-YTLX200405014.htm
    Xie C Q, Pan K, Liao C S, et al. 2017. Landslide mechanism and treatment measures for high fill slope at airport in southwestern China[J]. Journal of Engineering Geology, 25(4):1083-1093. http://en.cnki.com.cn/Article_en/CJFDTotal-GCDZ201704023.htm
    Xiong Y L, Zhu H H, Ye G L, et al. 2017. Analysis of failure of unsaturated soil slope due to rainfall based on soil-water-air seepage-deformation coupling FEM[J]. Rock and Soil Mechanics, 38(1):284-290. http://www.cqvip.com/QK/94551X/201701/671011186.html
    Xu H, Zhu Y W, Cai Y Q, et al. 2005. Stability analysis of unsaturated soil slopes under rainfall infiltration[J]. Rock and Soil Mechanics, 26(12):1957-1962. http://d.old.wanfangdata.com.cn/Periodical/cslgdxxb201801003
    Xu Q, Tan X H, Shen M F. 2012. Stability analysis of soil slopes under rainfall infiltration[J]. Chinese Journal of Geotechnical Engineering, 34 (S):254-259. http://d.old.wanfangdata.com.cn/Periodical/cslgdxxb201801003
    Zhang S, Pei X J, Huang R Q, et al. 2017. Rainfall induced instability mechanism of high embankment retaining loess slope[J]. Journal of Engineering Geology, 25(4):1094-1104. http://en.cnki.com.cn/Article_en/CJFDTOTAL-GCDZ201704024.htm
    董文文, 朱鸿鹄, 孙义杰, 等. 2016.边坡变形监测技术现状及新进展[J].工程地质学报, 24(6):1088-1095. http://www.gcdz.org/CN/abstract/abstract12282.shtml
    孔郁斐, 宋二祥, 杨军, 等. 2013.降雨入渗对非饱和土边坡稳定性的影响[J].土木建筑与环境工程, 35(6):16-21. http://d.old.wanfangdata.com.cn/Periodical/cqjzdxxb201306003
    孔郁斐, 周梦佳, 宋二祥, 等. 2014.利用PLAXIS软件计算考虑降雨的边坡稳定性[J].水利水运工程学报, 3:70-76. http://d.old.wanfangdata.com.cn/Periodical/slsykxyj201403011
    李毅, 伍嘉, 李坤, 等. 2012.基于FLAC3D的饱和-非饱和渗流分析[J].岩土力学, 33(2):617-622. doi: 10.3969/j.issn.1000-7598.2012.02.046
    李广信. 2016.高等土力学[M].北京:清华大学出版社:114-202.
    李焕强, 孙红月, 孙新民, 等. 2009.降雨入渗对边坡性状影响的模型实验研究[J].岩土工程学报, 31(4):589-594. doi: 10.3321/j.issn:1000-4548.2009.04.016
    Lu N, Likos W J. 2012.非饱和土力学[M].韦昌富, 侯龙, 简文星, 译.北京: 高等教育出版社: 195-291.
    平扬, 刘明智, 郑少河. 2004, 降雨入渗条件下的膨胀土边坡稳定性分析[J].岩石力学与工程学报, 23(增1):4478-4484. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb2004z1044
    谭龙, 韦昌富, 田慧会, 等. 2017土体持水特性及孔隙水分布特性的试验研究[J].工程地质学报, 25(1):73-79. http://www.gcdz.org/CN/abstract/abstract12325.shtml
    谭文辉, 璩世杰, 高丹青, 等. 2010.降雨入渗对边坡稳定性的影响分析[J].武汉理工大学学报, 32(15):39-43. doi: 10.3963/j.issn.1671-4431.2010.15.010
    王睿, 张嘎, 张建民. 2010.降雨条件下含软弱夹层土坡的离心模型试验研究[J].岩土工程学报, 32(10):1582-1587. http://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201010018.htm
    王刚, 孙萍, 吴礼舟, 等. 2017.降雨诱发浅表层黄土滑坡机理实验研究[J].工程地质学报, 25(5):1252-1263. http://www.gcdz.org/CN/abstract/abstract12542.shtml
    王协群, 张有祥, 邹维列, 等. 2010.降雨入渗条件下非饱和路堤变形与边坡的稳定数值模拟[J].岩土力学, 31(11):3640-3645. doi: 10.3969/j.issn.1000-7598.2010.11.046
    吴俊杰, 王成华, 李广信. 2004.非饱和土基质吸力对边坡稳定的影响[J].岩土力学, 25(5):732-736. doi: 10.3969/j.issn.1000-7598.2004.05.013
    吴长富, 朱向荣, 尹小涛, 等. 2008.强降雨条件下土质边坡瞬态稳定性分析[J].岩土力学, 29(2):386-391. doi: 10.3969/j.issn.1000-7598.2008.02.018
    谢春庆, 潘凯, 廖崇高.等. 2017.西南某机场高填方边坡滑塌机制分析与处理措施研究[J].工程地质学报, 25(4):1083-1093. http://www.gcdz.org/CN/abstract/abstract12446.shtml
    熊勇林, 朱合华, 叶冠林, 等. 2017.降雨入渗引起非饱和土边坡破坏的水-土-气三相渗流-变形耦合有限元分析[J].岩土力学, 38(1):284-290. http://d.old.wanfangdata.com.cn/Periodical/ytlx201701036
    徐晗, 朱以文, 蔡元奇, 等. 2005.降雨入渗条件下非饱和土边坡稳定分析[J].岩土力学, 26(12):1957-1962. doi: 10.3969/j.issn.1000-7598.2005.12.019
    徐全, 谭晓慧, 沈梦芬. 2012.降雨入渗条件下土质边坡的稳定性分析[J].岩土工程学报, 34(增):254-259. http://d.old.wanfangdata.com.cn/Conference/7946230
    张硕, 裴向军, 黄润秋, 等. 2017.降雨诱发黄土高填方支挡边坡失稳机理研究[J].工程地质学报, 25 (4):1094-1104. http://www.gcdz.org/CN/abstract/abstract12447.shtml
  • 加载中
图(8) / 表(1)
计量
  • 文章访问数:  2668
  • HTML全文浏览量:  518
  • PDF下载量:  189
  • 被引次数: 0
出版历程
  • 收稿日期:  2017-11-27
  • 修回日期:  2018-02-25
  • 刊出日期:  2018-12-25

目录

    /

    返回文章
    返回