ISSN 1000-3665 CN 11-2202/P
  • 中文核心期刊
  • Scopus 收录期刊
  • 中国科技核心期刊
  • DOAJ 收录期刊
  • CSCD 收录期刊
  • 《WJCI 报告》收录期刊
欢迎扫码关注“i环境微平台”

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

降雨诱发堆积体滑坡水土响应与稳定性时空演化试验研究

孟生勇 江兴元 杨义 孙乾征 史文兵

孟生勇,江兴元,杨义,等. 降雨诱发堆积体滑坡水土响应与稳定性时空演化试验研究[J]. 水文地质工程地质,2023,50(1): 104-112 doi:  10.16030/j.cnki.issn.1000-3665.202204014
引用本文: 孟生勇,江兴元,杨义,等. 降雨诱发堆积体滑坡水土响应与稳定性时空演化试验研究[J]. 水文地质工程地质,2023,50(1): 104-112 doi:  10.16030/j.cnki.issn.1000-3665.202204014
MENG Shengyong, JIANG Xingyuan, YANG Yi, et al. An experimental study of spatial-temporal evolution of water-soil response and stability of a rainfall-induced accumulation landslide[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 104-112 doi:  10.16030/j.cnki.issn.1000-3665.202204014
Citation: MENG Shengyong, JIANG Xingyuan, YANG Yi, et al. An experimental study of spatial-temporal evolution of water-soil response and stability of a rainfall-induced accumulation landslide[J]. Hydrogeology & Engineering Geology, 2023, 50(1): 104-112 doi:  10.16030/j.cnki.issn.1000-3665.202204014

降雨诱发堆积体滑坡水土响应与稳定性时空演化试验研究

doi: 10.16030/j.cnki.issn.1000-3665.202204014
基金项目: 国家自然科学基金项目(42007271);贵州省地质矿产勘查开发局地质科学技术研究项目([2021]21);贵州省科技厅基础研究计划项目([2017]7286);贵州大学实验室开放课题重点项目(SYSKF2022-015);国家地质灾害自动化监测技术创新平台培育基地开放项目(KF2019-5);贵州大学省级教改项目(2020005)
详细信息
    作者简介:

    孟生勇(1997-),男,硕士研究生,主要从事地质灾害研究工作。E-mail:1731485988@qq.com

    通讯作者:

    江兴元(1986-),男,博士,副教授,主要从事地质灾害评价与防治研究。E-mail:xyjiang3@gzu.edu.cn

  • 中图分类号: P642.22;TU411

An experimental study of spatial-temporal evolution of water-soil response and stability of a rainfall-induced accumulation landslide

  • 摘要: 降雨在松散堆积土中入渗引起内部水土力学的变化是影响稳定性的关键。目前研究多侧重考虑颗粒粒径、含量等因素对斜坡破坏的影响,但是针对斜坡体内部水土响应及稳定性时空演化方面的研究存在不足。基于野外滑坡案例,通过室内降雨滑坡模型试验、土力学试验和理论分析手段,研究了降雨触发松散堆积体斜坡变形破坏过程及模式,采用Van Genuchten模型(VG模型)重构了土体的土-水特征曲线,重点探究了斜坡内部水土力学变化以及稳定性时空演化规律。结果表明:(1)堆积体斜坡破坏经历了微裂隙发育-局部破坏-整体破坏3个阶段,呈现出“初期拉裂-坡面坍塌-塑性滑动”的破坏模式;(2)入渗过程斜坡体积含水率以及孔隙水压力急速增加,而土颗粒之间基质吸力下降甚至消散,促进了斜坡破坏发展;(3)土体力学强度随体积含水率升高呈指数下降,体积含水率为36.3%时,有效黏聚力和有效内摩擦角仅为0.27 kPa、3.39°;(4)基于极限平衡理论和斜坡土水特征监测数据,构建了斜坡稳定性时空演化图谱,与模型试验破坏特征有较好的一致性。研究结果对降雨作用下的堆积层斜坡监测预警与防灾减灾提供理论支撑。
  • 图  1  思南县凉山村下街滑坡工程地质平面图与特征图

    Figure  1.  Geomorphic map and feature map of Xiajie landslide

    图  2  原始滑体和试验土体颗粒级配

    Figure  2.  Particle gradation of original and testing soil

    图  3  试验模型装置及传感器(单位:mm)

    Figure  3.  Test model device and sensors (unit: mm)

    图  4  斜坡模型破坏发展过程

    Figure  4.  Development process of slope

    图  5  不同深度处含水率、基质吸力以及孔隙水压力变化

    Figure  5.  Relationship between water content, substrate suction and stability factor at different depths

    图  6  不同含水率条件下试样强度衰减曲线

    Figure  6.  Strength decay curve of sample under different volumetric water contents

    图  7  试验土体的土-水特征曲线

    Figure  7.  SWCC of the experimental soil

    图  8  斜坡不同时刻稳定性系数演化云图

    Figure  8.  Evolution nephogram of slope stability coefficient at different time points

    表  1  斜坡稳定性分析土体参数(t=10 min)

    Table  1.   Soil parameters for slope stability analysis (t=10 min)

    参数Z/cmc'/kPaφ'/(°)γd/(kN·m−3β/(°)θr/%θs/%
    数值5.063.1428.7411.8625349
    12.473.33
    12.833.34
    15.003.37
    25.273.45
    下载: 导出CSV
  • [1] HUANG Runqiu,FAN Xuanmei. The landslide story[J]. Nature Geoscience,2013,6(5):325 − 326. doi:  10.1038/ngeo1806
    [2] ZHANG S,ZHANG L M,CHEN H X. Relationships among three repeated large-scale debris flows at Pubugou Ravine in the Wenchuan earthquake zone[J]. Canadian Geotechnical Journal,2014,51(9):951 − 965. doi:  10.1139/cgj-2013-0368
    [3] CUOMO S,DI P A,MARTINELLI M. Modelling the spatio-temporal evolution of a rainfall-induced retrogressive landslide in an unsaturated slope[J]. Engineering Geology,2021,294:106371. doi:  10.1016/j.enggeo.2021.106371
    [4] GHOSH S,BORA A,NATH S,et al. Analysing the spatio-temporal evolution of an active debris slide in Eastern Himalaya,India[J]. Journal of the Geological Society of India,2014,84(3):292 − 302. doi:  10.1007/s12594-014-0132-0
    [5] 白永健,葛华,冯文凯,等. 乌蒙山区红层软岩滑坡地质演化及灾变过程离心机模型试验研究[J]. 岩石力学与工程学报,2019,38(增刊 1):3025 − 3035. [BAI Yongjian,GE Hua,FENG Wenkai,et al. Centrifugal tests on geological evolution and sliding process for red-bed soft rock landslide in Wumeng Mountain area[J]. Chinese Journal of Rock Mechanics and Engineering,2019,38(Sup 1):3025 − 3035. (in Chinese with English abstract)
    [6] 冯文凯,胡云鹏,谢吉尊,等. 顺层震裂斜坡降雨触发灾变机制及稳定性分析—以三溪村滑坡为例[J]. 岩石力学与工程学报,2016,35(11):2197 − 2207. [FENG Wenkai,HU Yunpeng,XIE Jizun,et al. Disaster mechanism and stability analysis of shattered bedding slopes triggered by rainfall: A case study of Sanxicun landslide[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(11):2197 − 2207. (in Chinese with English abstract)
    [7] WANG G,SASSA K. Factors affecting rainfall-induced flowslides in laboratory flume tests[J]. Géotechnique,2001,51(7):587 − 599.
    [8] 左自波,张璐璐,王建华. 降雨触发不同级配堆积体滑坡模型试验研究[J]. 岩土工程学报,2015,37(7):1319 − 1327. [ZUO Zibo,ZHANG Lulu,WANG Jianhua. Model tests on rainfall-induced colluvium landslides:Effects of particle-size distribution[J]. Chinese Journal of Geotechnical Engineering,2015,37(7):1319 − 1327. (in Chinese with English abstract)
    [9] 涂国祥,邓辉,黄润秋. 水位变动速度对某库区岸坡堆积体稳定性的影响[J]. 四川大学学报(工程科学版),2011,43(4):63 − 70. [TU Guoxiang,DENG Hui,HUANG Runqiu. Influence on a bank slope accumulation’ stability of the rising or falling speed of a reservoir water level[J]. Journal of Sichuan University (Engineering Science Edition),2011,43(4):63 − 70. (in Chinese with English abstract)
    [10] ORENSE R P,SHIMOMA S,MAEDA K,et al. Instrumented model slope failure due to water seepage[J]. Journal of Natural Disaster Science,2004,26(1):15 − 26. doi:  10.2328/jnds.26.15
    [11] SASAHARA K. Prediction of the shear deformation of a sandy model slope generated by rainfall based on the monitoring of the shear strain and the pore pressure in the slope[J]. Engineering Geology,2017,224:75 − 86. doi:  10.1016/j.enggeo.2017.05.003
    [12] SASAHARA K,SAKAI N. Development of shear deformation due to the increase of pore pressure in a sandy model slope during rainfall[J]. Engineering Geology,2014,170(4):43 − 51.
    [13] 李爱国,岳中琦,谭国焕,等. 土体含水率和吸力量测及其对边坡稳定性的影响[J]. 岩土工程学报,2003,25(3):278 − 282. [LI Aiguo,YUE Zhongqi,TAN Guohuan,et al. Soil moisture and suction measurement and its effect on slope stability[J]. Chinese Journal of Geotechnical Engineering,2003,25(3):278 − 282. (in Chinese with English abstract)
    [14] BORDONI M,MEISINA C,VALENTINO R,et al. Hydrological factors affecting rainfall-induced shallow landslides:From the field monitoring to a simplified slope stability analysis[J]. Engineering Geology,2015,193:19 − 37. doi:  10.1016/j.enggeo.2015.04.006
    [15] HU W,XU Q,VAN ASCH T W J,et al. Flume tests to study the initiation of huge debris flows after the Wenchuan earthquake in S-W China[J]. Engineering Geology,2014,182:121 − 129. doi:  10.1016/j.enggeo.2014.04.006
    [16] HU Wei,SCARINGI G,XU Qiang,et al. Internal erosion controls failure and runout of loose granular deposits:evidence from flume tests and implications for postseismic slope healing[J]. Geophysical Research Letters,2018,45(11):5518 − 5527. doi:  10.1029/2018GL078030
    [17] 张玉成,杨光华,张有祥,等. 古滑坡滑带土的力学特性与库水位变化对其稳定性影响及加固措施[J]. 岩土力学,2016,37(增刊 2):43 − 52. [ZHANG Yucheng,YANG Guanghua,ZHANG Youxiang,et al. Influence of mechanical properties of sliding zone and water level changes on ancient landslide stability and its reinforcement measures[J]. Rock and Soil Mechanics,2016,37(Sup 2):43 − 52. (in Chinese with English abstract)
    [18] 唐军峰,唐雪梅,周基,等. 滑坡堆积体变形失稳机制:以贵州剑河县东岭信滑坡为例[J]. 吉林大学学报(地球科学版),2022,52(2):503 − 516. [TANG Junfeng, TANG Xuemei, ZHOU Ji, et al. Deformation and instability mechanism of landslide accumulation:A case study of donglingxin landslide accumulation in Jianhe County, Guizhou Province[J]. Journal of Jilin University (Earth Science Edition),2022,52(2):503 − 516. (in Chinese with English abstract)
    [19] 杨宗佶,蔡焕,雷小芹,等. 非饱和地震滑坡堆积体降雨破坏水-力耦合行为试验[J]. 岩土力学,2019,40(5):1869 − 1880. [YANG Zongji,CAI Huan,LEI Xiaoqin,et al. Experiment on hydro-mechanical behavior of unsaturated gravelly soil slope[J]. Rock and Soil Mechanics,2019,40(5):1869 − 1880. (in Chinese with English abstract)
    [20] 蒋中明,曾铃,付宏渊,等. 极端久雨条件下软岩边坡动态稳定性分析[J]. 中国公路学报,2014,27(2):27 − 34. [JIANG Zhongming,ZENG Ling,FU Hongyuan,et al. Dynamic stability analysis of soft rock slope due to extremely prolonged rainfall[J]. China Journal of Highway and Transport,2014,27(2):27 − 34. (in Chinese with English abstract)
    [21] 朱元甲,贺拿,钟卫,等. 间歇型降雨对堆积层斜坡变形破坏的物理模拟研究[J]. 岩土力学,2020,41(12):4035 − 4044. [ZHU Yuanjia,HE Na,ZHONG Wei,et al. Physical simulation study of deformation and failure accumulation layer slope caused by intermittent rainfall[J]. Rock and Soil Mechanics,2020,41(12):4035 − 4044. (in Chinese with English abstract)
    [22] 付宏渊,曾铃,王桂尧,等. 降雨入渗条件下软岩边坡稳定性分析[J]. 岩土力学,2012,33(8):2359 − 2365. [FU Hongyuan,ZENG Ling,WANG Guiyao,et al. Stability analysis of soft rock slope under rainfall infiltration[J]. Rock and Soil Mechanics,2012,33(8):2359 − 2365. (in Chinese with English abstract)
    [23] 张晨阳,张泰丽,张明,等. 东南沿海地区玄武岩残积土雨水运移特征及滑坡失稳数值模拟[J]. 水文地质工程地质,2019,46(4):42 − 50. [ZHANG Chenyang,ZHANG Taili,ZHANG Ming,et al. Rainfall infiltration characteristics and numerical simulation of slope instability in the basalt residual soil in the coastal area of Southeast China[J]. Hydrogeology & Engineering Geology,2019,46(4):42 − 50. (in Chinese with English abstract)
    [24] BROOKS R H,COREY A T. Hydraulic properties of porous media[J]. Hydrol Pap,1964:1 − 27.
    [25] VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal,1980,44(5):892 − 898. doi:  10.2136/sssaj1980.03615995004400050002x
    [26] FREDLUND D G,XING Anqing. Erratum: Equations for the soil-water characteristic curve[J]. Canadian Geotechnical Journal,1994,31(6):1026 − 1026. doi:  10.1139/t94-120
    [27] LU Ning, GODT J W. 斜坡水文与稳定 [M]. 简文星, 王菁莪, 侯龙, 译. 北京: 高等教育出版社, 2014: 297-298.

    LU Ning, GODT J W. Hillslope hydrology and stability [M]. JAN Wenxing, WANG Jing’e, HOU Long, tans. Beijing: Higher Education Press, 2014: 297-298.
    [28] 陈卫金,程东会,陶伟. van Genuchten模型参数的物理意义[J]. 水文地质工程地质,2017,44(6):147 − 153. [CHEN Weijin,CHENG Donghui,TAO Wei. Physical significance of the parameters in the van Genuchten model[J]. Hydrogeology & Engineering Geology,2017,44(6):147 − 153. (in Chinese with English abstract)
    [29] 彭建平,邵爱军. 基于Matlab方法确定VG模型参数[J]. 水文地质工程地质,2006,33(6):25 − 28. [PENG Jianping,SHAO Aijun. Determination of the parameters of VG model based on Matlab[J]. Hydrogeology & Engineering Geology,2006,33(6):25 − 28. (in Chinese with English abstract)
  • 加载中
图(8) / 表(1)
计量
  • 文章访问数:  115
  • HTML全文浏览量:  141
  • PDF下载量:  76
  • 被引次数: 0
出版历程
  • 收稿日期:  2022-04-11
  • 录用日期:  2022-07-25
  • 修回日期:  2022-06-16
  • 网络出版日期:  2022-12-08
  • 刊出日期:  2023-01-13

目录

    /

    返回文章
    返回