EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF SHALLOW LOESS LANDSLIDE UNDER THE EFFECT OF IRRIGATION

WANG Gang; SUN Ping; WU Lizhou; SHI Lunyan; ZHU Enzhen

2017 Vol. 23, No. 5

Article Contents

Article navigation > Journal of Geomechanics > 2017 > 23(5): 778-787

Next Article Previous Article

WANG Gang, SUN Ping, WU Lizhou, SHI Lunyan, ZHU Enzhen. EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF SHALLOW LOESS LANDSLIDE UNDER THE EFFECT OF IRRIGATION[J]. Journal of Geomechanics, 2017, 23(5): 778-787.

Citation:

WANG Gang, SUN Ping, WU Lizhou, SHI Lunyan, ZHU Enzhen. EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF SHALLOW LOESS LANDSLIDE UNDER THE EFFECT OF IRRIGATION[J]. Journal of Geomechanics, 2017, 23(5): 778-787.

EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF SHALLOW LOESS LANDSLIDE UNDER THE EFFECT OF IRRIGATION

1.
Institute of Geomechanics, Chinese Academy of Geological sciences, Beijing 100081, China
2.
Key Laboratory of Neotectonic Movement and Geohazard, Ministry of Land and Resourses, Beijing 100081, China
3.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
4.
Chinese Academy of Geological sciences, China University of Geosciences, Beijing 100083, China

More Information

Corresponding author: SUN Ping, sunpingcgs@163.com

Received Date: 11 December 2016

Publish Date: 25 October 2017

Abstract

Abstract

In order to effectively reduce the enormous losses to society and economy caused by shallow loess landslides triggered by irrigation in large area of Jingyang, it is of great realistic significance to carry out laboratory experimental study on irrigation-induced landslides and to study the effects of slope gradient on deformation and failure process of loess slope under irrigation condition. Irrigation rig used for slope surface and slope top irrigation was designed. In the meanwhile, two groups of indoor physical model experiments respectively with slope of 45 degrees and slope of 60 degrees were conducted, and three kinds of sensors namely volume moisture sensors, matric suction sensors and pore water pressure sensors were buried inside the slopes to record the internal changes. Based on the analysis and the comparison of the experimental procedures and results of two groups, the deformation and failure law of shallow loess landslide under irrigation condition is disclosed, and the failure mode and the triggering mechanism of this kind of landslides are summarized. The experimental results show that, at the early stage of the experiments, with the continuous increases of volume moisture, the matric suction of the loess decreased gradually and maintained stable in the end while the strength reduced accordingly at the later stage, the upper loess of the slope reached the saturation stage, excess pore water pressure was generated by the slope deformation and poor drainage of the loess, which decreased the effective stress and the strength of the loess. As a result, the strength reached the minimum, which resulted in landslides. And meanwhile, the steeper a slope is, the greater probability of landslide occurrence is, and the smaller the depth of sliding surface and sliding distance are.
- Loess slope /
- irrigation /
- landslide /
- physical model experiment /
- pore water pressure

FullText(HTML)

References

[1]	朱立峰, 胡炜, 贾俊, 等.甘肃永靖黑方台地区灌溉诱发型滑坡发育特征及力学机制[J].地质通报, 2013, 32(6):840~846. Google Scholar ZHU Lifeng, HU Wei, JIA Jun, et al. Development features and mechanical mechanism of irrigation-induced landslides in Heifangtai, Gansu Province[J]. Geological Bulletin of China, 2013, 32(6):840~846. (in Chinese with English abstract) Google Scholar
[2]	徐善常, 梁庆国, 李帅帅, 等.甘肃定西原状Q₃黄土各向异性试验研究[J].地质力学学报, 2015, 21(3):378~385. Google Scholar XU Shanchang, LIANG Qingguo, LI Shuaishuai, et al. Experimental study on anisotropic characteristics of undisturbed Q₃ loess from Dingxi, Gansu[J]. Journal of Geomechanics, 2015, 21(3):378~385. (in Chinese with English abstract) Google Scholar
[3]	蔺晓燕, 李同录, 赵纪飞, 等.甘肃黑方台黄土固结-渗透特性试验研究[J].水文地质工程地质, 2014, 41(1):41~47. Google Scholar LIN Xiaoyan, LI Tonglu, ZHAO Jifei, et al. Permeability characteristics of loess under different consolidation pressures in the Heifangtai platform[J]. Hydrogeology and Engineering Geology, 2014, 41(1):41~47. (in Chinese with English abstract) Google Scholar
[4]	雷祥义.陕西泾阳南塬黄土滑坡灾害与引水灌溉的关系[J].工程地质学报, 1995, 3(1):56~64. Google Scholar LEI Xiangyi. The hazards of loess landslides in the southern tableland of Jingyang county, Shaanxi and their relationship with the channel water into fields[J]. Journal of Engineering Geology, 1995, 3(1):56~64. (in Chinese with English abstract) Google Scholar
[5]	田尤, 杨为民, 黄晓, 等.天水市麦积区幅黄土滑坡发育分布特征及其孕灾因素分析[J].地质力学学报, 2016, 22(1):25~38. Google Scholar TIAN You, YANG Weimin, HUANG Xiao, et al. Distribution characteristics and inducing factors of loess landslide in Maiji mappable unit, Tianshui[J]. Journal of Geomechanics, 2016, 22(1):25~38. (in Chinese with English abstract) Google Scholar
[6]	王家鼎, 肖树芳, 张倬元.灌溉诱发高速黄土滑坡的运动机理[J].工程地质学报, 2001, 9(3):241~246. Google Scholar WANG Jiading, XIAO Shufang, ZHANG Zhuoyuan. The mechanism for movement of irrigation-induced high-speed loess landslide[J]. Journal of Engineering Geology, 2001, 9(3):241~246. (in Chinese with English abstract) Google Scholar
[7]	王家鼎, 惠泱河.黄土地区灌溉水诱发滑坡群的研究[J].地理科学, 2002, 22(3):305~310. Google Scholar WANG Jiading, HUI Yanghe. Landslides in crows induced by irrigated water in Loess Area[J]. Scientia Geographica Sinica, 2002, 22(3):305~310. (in Chinese with English abstract) Google Scholar
[8]	Xu L, Dai F C, Gong Q M, et al. Irrigation-induced loess flow failure in Heifangtai Platform, North-West China[J]. Environmental Earth Sciences, 2012, 66(6):1707~1713. doi: 10.1007/s12665-011-0950-y CrossRef Google Scholar
[9]	朱立峰, 胡炜, 贾俊, 等.甘肃永靖黑方台地区灌溉诱发型滑坡发育特征及力学机制[J].地质通报, 2013, 32(6):840~846. (本条文献与第1条文献重复, 请核对) Google Scholar ZHU Lifeng, HU Wei, JIA Jun, et al. Development features and mechanical mechanism of irrigation-induced landslides in Heifangtai, Gansu Province[J]. Geological Bulletin of China, 2013, 32(6):840~846. (in Chinese with English abstract) Google Scholar
[10]	谷天峰, 朱立峰, 胡炜, 等.灌溉引起地下水位上升对斜坡稳定性的影响——以甘肃黑方台为例[J].现代地质, 2015, 29(2):408~413. Google Scholar GU Tianfeng, ZHU Lifeng, HU Wei, et al. Effect on slope stability due to groundwater rising caused by irrigation:A case study of Heifang platform in Gansu, China[J]. Geoscience, 2015, 29(2):408~413. (in Chinese with English abstract) Google Scholar
[11]	董英, 贾俊, 张茂省, 等.甘肃永靖黑方台地区灌溉诱发作用与黄土滑坡响应[J].地质通报, 2013, 32(6):893~898. Google Scholar DONG Ying, JIA Jun, ZHANG Maosheng, et al. An analysis of the inducing effects of irrigation and the responses of loess landslides in Heifangtai area[J]. Geological Bulletin of China, 2013, 32(6):893~898. (in Chinese with English abstract) Google Scholar
[12]	Dong Y, Zhang M S, Liu J, et al. Loess landslides respond to groundwater level change in Heifangtai, Gansu Province[A]. Sassa K, Canuti P, Yin Y P. Landslide Science for a Safer Geoenvironment:Landslide Science for a Safer Geoenvironment[M]. Cham:Springer, 2014, 227~231. Google Scholar
[13]	赵宽耀, 许强, 亓星, 等.甘肃黑方台黄土滑坡类型及其发育特征研究[J].人民长江, 2016, 47(14):46~50, 68. Google Scholar ZHAO Kuanyao, XU Qiang, QI Xing, et al. Research on types and characteristics of loess landslides in Gansu Heifangtai[J]. Yangtze River, 2016, 47(14):46~50, 68. (in Chinese with English abstract) Google Scholar
[14]	慕焕东, 宋登艳, 张茂省, 等.灌溉诱发型黄土滑坡离心模型试验研究[J].岩土工程学报, 2016, 38(S2):172~177. Google Scholar MU Huandong, SONG Dengyan, ZHANG Maosheng, et al. Centrifuge modelling tests on loess landslides induced by irrigation[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(S2):172~177. (in Chinese with English abstract) Google Scholar
[15]	宋登艳. 灌溉诱发型黄土滑坡离心模型实验和数值分析[D]. 西安: 长安大学, 2014.http://kns.cnki.net/KCMS/detail/detail.aspx?filename=ytgc2016s2028&dbname=CJFD&dbcode=CJFQ Google Scholar SONG Dengyan. The centrifuge modeling test and numerical analysis of irrigation-induced loess landslide[D]. Xi'an:Chang'an University, 2014. (in Chinese with English abstract) Google Scholar
[16]	金艳丽, 戴福初.灌溉诱发黄土滑坡机理研究[J].岩土工程学报, 2007, 29(10):1493~1499. doi: 10.3321/j.issn:1000-4548.2007.10.011 CrossRef Google Scholar JIN Yanli, DAI Fuchu. The mechanism of irrigation-induced landslides of loess[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(10):1493~1499. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-4548.2007.10.011 CrossRef Google Scholar
[17]	Hu W, Zhu L F, Zhang M S, et al. Analyses of the changes of loess engineering properties induced by irrigation[A]. Sassa K, Canuti P, Yin Y P. Landslide Science for a Safer Geoenvironment:Volume 2:Methods of Landslide Studies[M]. Cham:Springer, 2014, 215~220. Google Scholar
[18]	赵纪飞. 灌溉引发的黑方台黄土滑坡-泥流形成机理研究[D]. 西安: 长安大学, 2013. Google Scholar ZHAO Jifei. The failure mechanism of irrigation-induced slide-flow on Heifangtai loess platform[D]. Xi'an:Chang'an University, 2013. (in Chinese with English abstract) Google Scholar
[19]	杨飞. 黑方台灌溉诱发黄土滑坡变形机理研究[D]. 西安: 长安大学, 2013.http://cdmd.cnki.com.cn/Article/CDMD-11941-1014023162.htm Google Scholar YANG Fei. Study on the irrigation induced mechanism of loess landslide deformation of Hei Fangtai[D]. Xi'an:Chang'an University, 2013. (in Chinese with English abstract) Google Scholar
[20]	武彩霞, 许领, 戴福初, 等.黑方台黄土泥流滑坡及发生机制研究[J].岩土力学, 2011, 32(6):1767~1773. Google Scholar WU Caixia, XU Ling, DAI Fuchu, et al. Topographic features and initiation of earth flows on Heifangtai loess plateau[J]. Rock and Soil Mechanics, 2011, 32(6):1767~1773. (in Chinese with English abstract) Google Scholar
[21]	朱立峰, 谷天峰, 胡炜, 等.灌溉诱发黄土滑坡的发育机制研究[J].工程地质学报, 2016, 24(4):485~491. Google Scholar ZHU Lifeng, GU Tianfeng, HU Wei, et al. Developmental mechanism of irrigation-induced loess landslides[J]. Journal of Engineering Geology, 2016, 24(4):485~491. (in Chinese with English abstract) Google Scholar
[22]	胡炜, 张茂省, 朱立峰, 等.黑方台灌溉渗透型黄土滑坡的运动学模拟研究[J].工程地质学报, 2012, 20(2):183~188. Google Scholar HU Wei, ZHANG Maosheng, ZHU Lifeng, et al. Kinematic simulation of irrigation-induced loess landslide in Heifangtai[J]. Journal of Engineering Geology, 2012, 20(2):183~188. (in Chinese with English abstract) Google Scholar
[23]	Li T L, Zhao J F, Li P, et al. Failure and motion mechanisms of a rapid loess flowslide triggered by irrigation in the Guanzhong irrigation area, Shaanxi, China[A]. Wang F W, Miyajima M, Li T L. Progress of Geo-Disaster Mitigation Technology in Asia[M]. Berlin Heidelberg:Springer, 2013, 421~433. Google Scholar
[24]	Terzaghi K. Theoretical Soil Mechanics[M]. New York:John Wiley & Sons, 1943. Google Scholar