留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

饱和黄土体侧向流滑机制的试验研究

张晓超 裴向军 贾俊 孙萍萍

张晓超, 裴向军, 贾俊, 等, 2018. 饱和黄土体侧向流滑机制的试验研究. 地质力学学报, 24 (5): 730-736. DOI: 10.12090/j.issn.1006-6616.2018.24.05.075
引用本文: 张晓超, 裴向军, 贾俊, 等, 2018. 饱和黄土体侧向流滑机制的试验研究. 地质力学学报, 24 (5): 730-736. DOI: 10.12090/j.issn.1006-6616.2018.24.05.075
ZHANG Xiaochao, PEI Xiangjun, JIA Jun, et al., 2018. EXPERIMENTAL STUDY ON THE LATERAL FLOW SLIDE MECHANISM OF SATURATED LOESS MASS. Journal of Geomechanics, 24 (5): 730-736. DOI: 10.12090/j.issn.1006-6616.2018.24.05.075
Citation: ZHANG Xiaochao, PEI Xiangjun, JIA Jun, et al., 2018. EXPERIMENTAL STUDY ON THE LATERAL FLOW SLIDE MECHANISM OF SATURATED LOESS MASS. Journal of Geomechanics, 24 (5): 730-736. DOI: 10.12090/j.issn.1006-6616.2018.24.05.075

饱和黄土体侧向流滑机制的试验研究

doi: 10.12090/j.issn.1006-6616.2018.24.05.075
基金项目: 

国家自然科学基金 41702335

国家自然科学基金重大项目 41790445

中国地调局地质调查项目 DD20089270

详细信息
    作者简介:

    张晓超(1978-), 女, 博士, 副教授, 主要从事岩土体稳定性及地质灾害评价、预测及防治方面的教学和科研工作。E-mail:31685032@qq.com

    通讯作者:

    贾俊(1985-), 男, 博士, 工程师, 主要从事岩土体稳定性及地质灾害评价、预测及防治方面的科研工作。E-mail:253364878@qq.com

  • 中图分类号: P642.22;TU435

EXPERIMENTAL STUDY ON THE LATERAL FLOW SLIDE MECHANISM OF SATURATED LOESS MASS

  • 摘要: 1920年海原Ms 8.5地震诱发了大量黄土液化型滑坡,多表现为低角度、长距离、流态化运动特征,甚至出现大范围近水平侧向扩展流滑现象,其特殊的成因机制颇受争议。为此,在对海原地震诱发的石碑塬滑坡遗迹详细勘查的基础上,借助DPRI-5大型环剪仪,进行饱和黄土稳态变形特性试验研究,探讨了固结压力、饱和度和剪切速率等因素对黄土稳态强度的影响规律。结果表明:黄土稳态强度受到固结压力、饱和度及加载速率等因素的影响。在不排水剪切条件下,固结压力越大,黄土孔压响应越慢,稳态强度越高;黄土的饱和度越高,黄土孔压响应越快,稳态强度越低;剪切速率对黄土强度具有一定弱化效应,当剪切速率<0.1 mm/s时,剪切速率对强度影响较小;当剪切速率介于0.1~1 mm/s范围时,随着剪切速率的提高,稳态强度有不同程度的降低;当剪切速率>1.0 mm/s时,随着剪切速率的增大,影响程度降低,稳态强度趋于恒定,总体上看来,饱和度越高,剪切速率对强度的弱化影响越明显。研究成果揭示了石碑塬饱和黄土层在低稳态强度下发生侧向流滑的致灾机理。

     

  • 图  1  石碑塬滑坡全貌

    a—石碑塬滑坡全貌;b—液化形成的波浪起伏状堆积地貌

    Figure  1.  The picture of the Shibeiyuan landslide

    图  2  石碑塬滑坡工程地质平面图

    1—房屋;2—道路;3—沟道;4—剖面线;5—钻孔及编号;6—探井及编号;7—泉;8—地层界限;9—滑坡区边界; 10—滑源区边界;11—推测滑坡剪出口;12—被滑坡掩埋的沟道;13—马兰黄土;14—第四系全新统冲洪积层;15—滑坡堆积层

    Figure  2.  Engineering geological map of the Shibeiyuan landslide

    图  3  石碑塬滑坡工程地质纵剖面图(Ⅱ-Ⅱ')

    Figure  3.  Engineering geological longitudinal section of the shibeiyuan landslide

    图  4  不同正应力下环剪试验时程曲线

    Figure  4.  Time-history curves of the ring shear test under different normal stress

    图  5  环剪试验的应力路径关系曲线

    Figure  5.  Stress path curves under different initial strains of the ring shear test

    图  6  环剪试验的黄土峰值强度和稳态强度

    Figure  6.  Losses peak strength and steady state strength of the ring shear test

    图  7  不同饱和度黄土环剪试验时程曲线

    Figure  7.  Time-history curves of the losses ring shear test under different saturabilities

    图  8  不同饱和度黄土的孔压时程曲线

    Figure  8.  Time-history curves of losses pore pressure of different saturabilities

    图  9  不同饱和度黄土的峰值强度和稳态强度

    Figure  9.  Losses peak strength and steady state strength under different saturabilities

    图  10  剪切速率与抗剪强度关系曲线

    Figure  10.  Relation curves between shear rate and shear strength

    表  1  试验黄土的基本物性指标

    Table  1.   The basic physical parameters of the test loess

    取样深度/m 土的天然状态物性指标 塑性指数Ip 粒度组成/%
    天然密度ρ/(g·cm-3) 含水率ω/% 孔隙比e0 粘粒<0.005/mm 粉粒0.005~0.075/mm 砂粒0.075~2.0/mm
    14.10 1.47 5.30 1.02 4.56 8.52 78.64 12.84
    下载: 导出CSV
  • [1] 袁丽侠.宁夏海原地震诱发黄土滑坡的形成机制研究-以西吉地区地震诱发黄土滑坡为例[D].西安: 西北大学, 2005.

    YUAN Lixia. The mechanism of loess landslide caused by earthquake in Haiyuan of Ninxia-taking the earthquake-induced loess landslide in Xiji as an example[D]. Xi'an: Northwestern University, 2005. (in Chinese with English abstract)
    [2] 陈永明, 石玉成.中国西北黄土地区地震滑坡基本特征[J].地震研究, 2006, 29(3):276~280. doi: 10.3969/j.issn.1000-0666.2006.03.012

    CHEN Yongming, SHI Yucheng. Basic characteristics of seismic landslides in loess area of northwest China[J] Journal of Seismological Research, 2006, 29(3):276~280. (in Chinese with English abstract) doi: 10.3969/j.issn.1000-0666.2006.03.012
    [3] 黄润秋, 裴向军, 张晓超, 等.黄土动参数与地震诱发黄土滑坡灾害机理专题研究[R].成都: 成都理工大学, 2014.

    HUANG Runqiu, PEI Xiangjun, ZHANG Xiaochao, et al. Special study on loess dynamic parameters and mechanism of loess landslides induced by earthquake[R]. Chengdu: Chengdu University of Technology, 2014. (in Chinese)
    [4] 白铭学, 张苏民.高烈度地震时黄土地层的液化移动[J].工程勘察, 1990, (6):1~5. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000000551291

    BAI Mingxue, ZHANG Sumin. Liquefaction movement of loess strata in high intensity earthquake[J]. Geotechnical Investigation and Surveying, 1990, (6):1~5. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000000551291
    [5] 王家鼎, 白铭学, 肖树芳.强震作用下低角度黄土斜坡滑移的复合机理研究[J].岩土工程学报, 2001, 23(4):445~449. doi: 10.3321/j.issn:1000-4548.2001.04.013

    WANG Jiading, BAI Mingxue, XIAO Shufang. A study on compound mechanism of earthquake-related sliding displacements on gently inclined loess slope[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(4):445~449. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-4548.2001.04.013
    [6] Zhang D X, Wang G H. Study of the 1920 Haiyuan earthquake-induced landslides in loess (China)[J]. Engineering Geology, 2007, 94(1/2):76~88. https://www.researchgate.net/publication/223359157_Study_of_the_1920_Haiyuan_earthquake-induced_landslides_in_loess_China
    [7] 王兰民, 张振中, 王峻, 等.随机地震荷载作用下黄土动本构关系的试验研究[J].西北地震学报, 1992, 14(4):61~68. http://d.old.wanfangdata.com.cn/Conference/140608

    WANG Lanmin, ZHANG Zhenzhong, WANG Jun, et al. Lab study of dynamic constitutive relationship of loess under random seismic loading[J]. Northwestern Seismological Journal, 1992, 14(4):61~68. (in Chinese with English abstract) http://d.old.wanfangdata.com.cn/Conference/140608
    [8] 王兰民, 张振中, 王峻, 等.随机地震荷载作用下黄土动强度的试验方法[J].西北地震学报, 1991, 13(3):50~55. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000003698205

    WANG Lanmin, ZHANG Zhenzhong, WANG Jun, et al. A test method of dynamic strength of loess under random seismic loading[J]. Northwestern Seismological Journal, 1991, 13(3):50~55. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK000003698205
    [9] 袁中夏, 王兰民, YASUDA S, 等.黄土液化机理和判别标准的再研究[J].地震工程与工程震动, 2004, 24(4):164~169. http://d.old.wanfangdata.com.cn/Periodical/dzgcygczd200404030

    YUAN Zhongxia, WANG Lanmin, Yasuda S, et al. Further study on mechanism and discrimination criterion of loess liquefaction[J]. Earthquake Engineering and Engineering Vibration, 2004, 24(4):164~169. (in Chinese with English abstract) http://d.old.wanfangdata.com.cn/Periodical/dzgcygczd200404030
    [10] 杨振茂, 赵成刚, 王兰民, 等.饱和黄土的液化特性与稳态强度[J].岩石力学与工程学报, 2004, 23(22):3853~3860. doi: 10.3321/j.issn:1000-6915.2004.22.022

    YANG Zhenmao, ZHAO Chenggang, WANG Lanmin, et al. Liquefaction behaviors and steady state strength of saturated loess[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(22):3853~3860. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-6915.2004.22.022
    [11] 亓星, 许强, 彭大雷, 等.地下水诱发渐进后退式黄土滑坡成因机理研究——以甘肃黑方台灌溉型黄土滑坡为例[J].工程地质学报, 2017, 25(1):147~153. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=gcdzxb201701020

    QI Xing, XU Qiang, PENG Dalei, et al. Mechanism of gradual retreat loess landslide caused by groundwater:A case study of the irrigation loess landslide in heifangtai, Gansu province[J]. Journal of Engineering Geology, 2017, 25(1):147~153. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=gcdzxb201701020
    [12] 许强, 彭大雷, 李为乐, 等.溃散性滑坡成因机理初探[J].西南交通大学学报, 2016, 51(5):995~1004. doi: 10.3969/j.issn.0258-2724.2016.05.024

    XU Qiang, PENG Dalei, LI Weile, et al. Study on formation mechanism of diffuse failure landslide[J]. Journal of Southwest Jiaotong University, 2016, 51(5):995~1004. (in Chinese with English abstract) doi: 10.3969/j.issn.0258-2724.2016.05.024
    [13] 张晓超, 黄润秋, 许模, 等.石碑塬滑坡黄土液化特征及其影响因素研究[J].岩土力学, 2014, 35(3):801~810. http://d.old.wanfangdata.com.cn/Periodical/ytlx201403031

    ZHANG Xiaochao, HUANG Runqiu, XU Mo, et al. Loess liquefaction characteristics and its influential factors of Shibeiyuan landslide[J]. Rock and Soil Mechanics, 2014, 35(3):801~810. (in Chinese with English abstract) http://d.old.wanfangdata.com.cn/Periodical/ytlx201403031
    [14] 周永习, 张得煊, 罗春泳, 等.饱和黄土稳态强度特性的试验研究[J].岩土力学, 2010, 31(5):1486~1490. doi: 10.3969/j.issn.1000-7598.2010.05.023

    ZHOU Yongxi, ZHANG Dexuan, LUO Chunyong, et al. Experimental research on steady strength of saturated loess[J]. Rock and Soil Mechanics, 2010, 31(5):1486~1490. (in Chinese with English abstract) doi: 10.3969/j.issn.1000-7598.2010.05.023
    [15] Wang G H, Zhang D X, Gen F, et al. Pore-pressure generation and fluidization in a loess landslide triggered by the 1920 Haiyuan earthquake, China:A case study[J]. Engineering Geology, 2014, 174:36~45. doi: 10.1016/j.enggeo.2014.03.006
    [16] 张帆宇.黄土的剪切行为和黄土滑坡[D].兰州: 兰州大学, 2011. http://cdmd.cnki.com.cn/Article/CDMD-10730-1012287701.htm

    ZHANG Fanyu. Shear behavior of loess and loess landslides[D]. Lanzhou: Lanzhou University, 2011. (in Chinese with English abstract) http://cdmd.cnki.com.cn/Article/CDMD-10730-1012287701.htm
    [17] Sassa K, Fukuoka H, Wang G H, et al. Undrained dynamic-loading ring-shear apparatus and its application to landslide dynamics[J]. Landslides, 2004, 1(1):7~19. doi: 10.1007/s10346-003-0004-y
    [18] 王兰民, 石玉成, 刘旭, 等.黄土动力学[M].北京:地震出版社, 2003.

    WANG Lanmin, SHI Yucheng, LIU Xu, et al. Loess dynamics[M]. Beijing:Seismological Press, 2003. (in Chinese)
  • 加载中
图(10) / 表(1)
计量
  • 文章访问数:  211
  • HTML全文浏览量:  65
  • PDF下载量:  7
  • 被引次数: 0
出版历程
  • 收稿日期:  2018-05-30
  • 修回日期:  2018-07-30
  • 刊出日期:  2018-10-01

目录

    /

    返回文章
    返回