泾阳南塬典型黄土滑坡成因、堆积及运动特征分析

马鹏辉 彭建兵 王启耀 朱兴华 董晴庆 翟栋梁

马鹏辉, 彭建兵, 王启耀, 朱兴华, 董晴庆, 翟栋梁. 2018: 泾阳南塬典型黄土滑坡成因、堆积及运动特征分析. 工程地质学报, 26(4): 930-938. doi: 10.13544/j.cnki.jeg.2017-380
引用本文: 马鹏辉, 彭建兵, 王启耀, 朱兴华, 董晴庆, 翟栋梁. 2018: 泾阳南塬典型黄土滑坡成因、堆积及运动特征分析. 工程地质学报, 26(4): 930-938. doi: 10.13544/j.cnki.jeg.2017-380
MA Penghui, PENG Jianbing, WANG Qiyao, ZHU Xinghua, DONG Qingqing, ZHAI Dongliang. 2018: FORMATION MECHANISM, DEPOSITS AND MOTION CHARACTERISTICS OF THE TYPICAL LOESS LANDSLIDE IN SOUTH JINGYANG PLATFORM. JOURNAL OF ENGINEERING GEOLOGY, 26(4): 930-938. doi: 10.13544/j.cnki.jeg.2017-380
Citation: MA Penghui, PENG Jianbing, WANG Qiyao, ZHU Xinghua, DONG Qingqing, ZHAI Dongliang. 2018: FORMATION MECHANISM, DEPOSITS AND MOTION CHARACTERISTICS OF THE TYPICAL LOESS LANDSLIDE IN SOUTH JINGYANG PLATFORM. JOURNAL OF ENGINEERING GEOLOGY, 26(4): 930-938. doi: 10.13544/j.cnki.jeg.2017-380

泾阳南塬典型黄土滑坡成因、堆积及运动特征分析

doi: 10.13544/j.cnki.jeg.2017-380
基金项目: 

国家973计划项目 2014CB744702

详细信息
    作者简介:

    马鹏辉(1990-), 男, 博士生, 从事黄土灾害链研究.Email:spawnkobe@163.com

  • 中图分类号: P642.1

FORMATION MECHANISM, DEPOSITS AND MOTION CHARACTERISTICS OF THE TYPICAL LOESS LANDSLIDE IN SOUTH JINGYANG PLATFORM

  • 摘要: 持续的引水灌溉导致陕西泾阳南塬黄土滑坡频繁发生,2015年5月26日庙店村附近发生一起黄土滑坡,冲毁农田数亩。本文以"5·26"滑坡作为典型的案例,通过详细的野外调查、测量、勘探等工作,分析了其诱发因素、运动过程、堆积特征。结果表明:(1)滑坡滑动距离278 m,后壁宽222 m,滑后后壁高差40 m,主滑方向45°;(2)滑坡呈现滑动多级次特点,前后滑动4次,滑体堆积面积约为6.2×104 m2,堆积体总体积约50×104 m3,堆积体平均堆积厚度约10 m;(3)滑坡的主要激发因子为持续灌溉,但是地表显式裂缝和土体深部裂隙在地表径流优势入渗中发挥了重要作用,导致地下水位持续抬升。而且滑坡区的节理控制了滑坡的后壁宽度和滑动方向。最后基于泾阳南塬滑坡发生的频率和降雨有着一定关联性,探讨了降雨对本次滑坡事件的影响和滑坡再次发生的可能性。
  • 图  1  滑坡航拍图

    Figure  1.  Aerial map of the landslide

    图  2  滑坡堆积特征

    Figure  2.  The deposit characteristics of the landslide

    图  3  研究区地层土体含水量分布

    Figure  3.  The soil water content in the study area

    图  4  滑坡后壁节理出露图

    Figure  4.  Characteristics of joints in the scarp of the landslide

    图  5  滑坡区引水灌溉与渠道塌陷

    Figure  5.  Irrigation and the collapse of a channel in the study area

    图  6  平硐裂缝分布图

    Figure  6.  The distribution of cracks in excavated adits

    图  7  2000~2015年月均降雨与滑坡的关系

    Figure  7.  The relationship between monthly rainfall and landslide during 2000~2015

    图  8  “5.26”滑坡滑前15 d降雨(5/11~5/26)

    Figure  8.  Antecedent rainfall for 15 days before the "5.26" landslide (5/11~5/26)

    图  9  滑坡后缘裂缝展布情况

    Figure  9.  The distribution of cracks behind the scarp of the landslide

    图  10  裂缝变化速率与灌溉、降雨的关系

    Figure  10.  The relationship between the rate of change of cracks and irrigation, rainfall

    表  1  庙店村地下水位变化

    Table  1.   The changes of groundwater level in the Miaodian village

    监测时间/y 塬边高程/m 阶地高程/m 水位/m 水位变化/m 数据来源
    1976 454.6 396.5 387.9 0 雷祥义,1995
    1992 454.6 396.5 401.1 +13.2 雷祥义,1995
    2015 454.6 396.5 426.1 +38.2 钻孔(34°30′7.38″N,108°45′8.49″E)
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-08-04
  • 录用日期:  2017-12-26
  • 刊出日期:  2018-08-25

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