Centrifugal model tests on slope failure induced by rainfall

DU Qiang; ZHOU Jian

doi:10.11779/CJGE2020S1010

Volume 42 Issue S1

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2020 > 42(S1): 50-54. > DOI: 10.11779/CJGE2020S1010

DU Qiang, ZHOU Jian. Centrifugal model tests on slope failure induced by rainfall[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 50-54. DOI: 10.11779/CJGE2020S1010

Citation:

DU Qiang, ZHOU Jian. Centrifugal model tests on slope failure induced by rainfall[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 50-54. DOI: 10.11779/CJGE2020S1010

Citation:

DU Qiang, ZHOU Jian. Centrifugal model tests on slope failure induced by rainfall[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 50-54. DOI: 10.11779/CJGE2020S1010

PDF (1754 KB)

Centrifugal model tests on slope failure induced by rainfall

DU Qiang^1,,
ZHOU Jian²

1.
School of Civil Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
2.
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

More Information

Received Date: May 31, 2020
Available Online: December 07, 2022

Graphical Abstract

Abstract

Abstract

By using the geotechnical centrifuge of Tongji University and combining with an artificial rainfall simulator which is designed to control the rainfall intensities, the centrifugal model tests are carried out to study the macro-mesoscopic formation mechanism of cohesionless soil slope failure induced by rainfall. During the test processes of slope failure, the pore pressure is measured by the high-speed dynamic data acquisition instrument and the precise pore water pressure sensor. Using the HD digital imaging equipment and the mesoscopic structure analysis software Geodip, the variation laws of soil microstructure during the formation of landslide are analyzed. The results show that the permeation and cumulation of rainwater in the slope body is regarded as the main cause of slope failure. The formation mechanism of landslide is the motion of the fine particles with migratation of pore water in the slope. The gathering of rain at the inner slope body causes the increase of pore pressure and the reduction of soil strength, and then the whole sliding occurs when the sliding force exceeds the shear strength of soil.
- slope failure,
- centrifugal model test,
- permeability coefficient,
- macro-mesoscopic mechanism

FullText(HTML)

References (12)

References

[1]	陈晓清, 崔鹏, 冯自立, 等. 滑坡转化泥石流起动的人工降雨试验研究[J]. 岩石力学与工程学报, 2006, 25(1): 106-116. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200601020.htm CHEN Xiao-qing, CUI Peng, FENG Zi-li, et al. Artificial rainfall experimental study on landslide translation to debris flow[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(1): 106-116. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX200601020.htm
[2]	胡明鉴, 汪稔, 张平仓. 斜坡稳定性及降雨条件下激发滑坡试验研究[J]. 岩土工程学报, 2001, 23(4): 454-457. doi: 10.3321/j.issn:1000-4548.2001.04.015 HU Ming-jian, WANG Ren, ZHANG Ping-cang. Primary research on the effect of rainfall on landslide[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(4): 454-457. (in Chinese) doi: 10.3321/j.issn:1000-4548.2001.04.015
[3]	林鸿州. 降雨诱发土质边坡失稳的试验与数值分析研究[D]. 北京: 清华大学, 2007. LIN Hong-zhou. The Study on the Mechanism and Numerical Analysis of Rainfall-Induced Soil Slope Failure[D]. Beijing: Tsinghua University, 2007. (in Chinese)
[4]	HUANG C C, JU Y J, HWU L K, et al. Internal soil moisture and piezometric responses to rainfall-induced shallow slope failures[J]. Journal of Hydrology, 2009, 370: 39-51. doi: 10.1016/j.jhydrol.2009.02.051
[5]	胥勋剑, 杨强. 黄莲树滑坡形成机理及稳定性分析[J]. 工程勘察, 2014, 42(8): 6-9. https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC201408003.htm XU Xun-jian, YANG Qiang. Formation mechanism and stability analysis of Huanglianshu landslide[J]. Geotechnical Investigation & Surveying, 2014, 42(8): 6-9. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC201408003.htm
[6]	陈剑, 安孟可, 龙维, 等. 云南汤家山松散堆积层滑坡滑带土的微观结构与机理分析[J]. 工程勘察, 2015, 43(1): 5-10, 25. https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC201501002.htm CHEN Jian, AN Meng-ke, LONG Wei, et al. Microstructure and mechanism analysis on the slip zone soil of Tangjiashan loose deposits landslide in Yunnan province[J]. Geotechnical Investigation & Surveying, 2015, 43(1): 5-10, 25. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCKC201501002.htm
[7]	WANG F W, SHIBATA H. Influence of soil permeability on rainfall induced flow slides in laboratory flume tests[J]. J of Can Geotech, 2007, 44: 1128-1136. doi: 10.1139/T07-042
[8]	张敏, 吴宏伟. 边坡离心模型试验中的降雨模拟研究[J]. 岩土力学, 2007, 28(增刊1): 53-57. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2007S1011.htm ZHANG Min, WU Hong-wei. Rainfall simulation techniques in centrifuge modelling of slopes[J]. Rock and Soil Mechanics, 2007, 28(S1): 53-57. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2007S1011.htm
[9]	钱纪芸, 张嘎, 张建民. 离心场中边坡降雨模拟系统的研制与应用[J]. 岩土工程学报, 2010, 32(6): 838-842. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006006.htm QIAN Ji-yun, ZHANG Ga, ZHANG Jian-min. Development of rainfall simulation system for centrifugal model tests[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(6): 838-842. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006006.htm
[10]	姚裕春, 姚令侃, 袁碧玉. 降雨条件下边坡破坏机理离心模型研究[J]. 中国铁道科学, 2004, 25(4): 64-69. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200404012.htm YAO Yu-chun, YAO Ling-kan, YUAN Bi-yu. Analysis of a centrifugal model of slope damage mechanism during rainfall[J]. China Railway Science, 2004, 25(4): 64-69. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200404012.htm
[11]	杨春宝, 朱斌, 孔令刚, 等. 水位变化诱发粉土边坡失稳离心模型试验[J]. 岩土工程学报, 2013, 35(7): 1261-1272. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201307013.htm YANG Chun-bao, ZHU Bin, KONG Ling-gang, et al. Centrifugal model tests on failure of silty slopes induced by change of water level[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1261-1272. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201307013.htm
[12]	王维早, 许强, 郑光, 等. 强降雨诱发缓倾堆积层边坡失稳离心模型试验研究[J]. 岩土力学, 2016, 37(1): 87-95. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201601011.htm WANG Wei-zao, XU Qiang, ZHENG Guang, et al. Centrifugal model tests on sliding failure of gentle debris slope under rainfall[J]. Rock and Soil Mechanics, 2016, 37(1): 87-95. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201601011.htm