灌溉诱发型黄土滑坡离心模型试验研究

慕焕东; 宋登艳; 张茂省; 邓亚虹

doi:10.11779/CJGE2016S2028

灌溉诱发型黄土滑坡离心模型试验研究 English Version

1. 西安理工大学岩土工程研究所,陕西西安 710048;
2. 机械工业勘察设计研究院有限公司,陕西西安 710043;
3. 中国地质调查局西安地质调查中心,陕西西安 710054;
4. 长安大学地质工程系,陕西西安 710054

基金项目: 国家自然科学基金项目（41372327）

详细信息

作者简介:
慕焕东(1989- ),男,助理工程师,主要从事岩土工程试验测试分析及模型试验。E-mail: mhdyhx@xaut.edu.cn。

计量
- 文章访问数: 450
- HTML全文浏览量: 9
- PDF下载量: 309
出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Centrifuge modelling tests on loess landslides induced by irrigation

1. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048;
2. China JK Institute of Engineering Investigation and Design, Xi'an 710043, China;
3. Xi'an Center of China Geological Survey, Xi'an 710054, China;
4. Department of Geology Engineering, Chang'an University, Xi'an 710054, China

摘要

摘要: 滑坡是一种常见的地质灾害,灌溉诱发黄土滑坡失稳是常见地质灾害之一。灌溉作用不仅改变了地下水平衡,而且降低了土体的抗滑强度,从而导致黄土滑坡的发生。针对黑方台焦家崖头13号黄土滑坡,开展了灌溉作用下滑坡失稳机理的离心模型试验研究,揭示了黄土滑坡的变形特性、应力水平及破坏模式。离心模型的制作考虑了 “粒径效应”、“尺寸效应”。离心试验结果表明：随着加载时间和离心加速度的增大,模型坡体沉降量、坡体土压力、坡体孔隙水压力均逐渐增大;坡体沉降量由坡顶至坡脚逐渐减小,最大垂直位移为33.38 mm,坡体土压力由坡顶至坡脚逐渐增大,最大土压力为320 kPa,坡体孔隙水压力表现为坡顶> 坡脚>坡体中部,最大孔隙水压力为157.08 kPa;坡体呈现出两级破坏模式,即第一阶段的坡脚蠕动变形,坡顶压制拉裂,第二阶段的坡体剪切滑移。
- 离心模型试验 /
- 灌溉 /
- 黑方台 /
- 黄土 /
- 滑坡
Abstract: The landslide is a common geological disaster, and the loess landslide instability induced by irrigation is one of the common geological disasters. Irrigation function changes the balance of ground water and reduces the resistance strength of soil mass, resulting in the occurrence of loess landslides. For the loess landslide No.13 of Jiaojiayatou, centrifugal model tests on landslide instability mechanism under irrigation effect are carried out. The deformation characteristics, stress levels and failure modes are revealed. The preporation of centrifugal model considers the influences caused by "particle size effect" and "size effect". The results show: (1) With the increase of loading time and centrifugal acceleration, the settlement, earth pressure, pore water pressure of model slope all gradually increase. (2) The slope settlement gradually decreases from the slope top to the toe. The maximum vertical displacement is 33.38 mm. The soil pressure of slope gradually increases from the slope top to the toe. The largest earth pressure is 320 kPa, the pore water pressure is the largest at the slope top, that at the toe is followed, and that in the middle is the smallest, and the maximum pore water pressure is 157.08 kPa. (3) The slope emerges two failure modes: one is creep deformation of the toe and pressure-induced crack of the top, the other is shear slip of the slope.
- centrifugal model test /
- irrigation /
- Heifangtai /
- loess /
- landslide

HTML全文

参考文献(12)

[1]	王家鼎, 等. 黑方台坮塬灌溉水诱发黄土滑坡群的系统分析[J]. 水土保持学报, 2001, 2(3): 10-13. (WANG Jia-ding, et al. Systems analysis on Heifangtai loess landslide in crows induced by irrigated water[J]. Bulle tin of Soil and Water Conservation, 2001, 2(3): 10-13. (in Chinese))
[2]	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. (WANG Jia-ding, XIAO Shu-fang, ZHANG Zhuo-yuan. The mechanism for movement of irrigation-induced high-speed loess landslide[J]. Journal of Engineering Geology, 2001, 9(3): 241-246. (in Chinese))
[3]	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. (JIN Yan-li, DAI Fu-chu. The mechanism of irrigation-induced landslides of loess[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(10): 1493-1499. (in Chinese))
[4]	许领, 戴福初, 邝国麟, 等. 黑方台黄土滑坡类型与发育规律[J]. 山地学报, 2008, 26(3): 364-371. (XU Ling, DAI Fu-chu, KWONG A K L, et al. Types and characteristics of loess and slides at Heifangtai loess plateau[J]. Journal of Mountain Science, 2008, 26(3): 364-371. (in Chinese))
[5]	张茂省, 李同录. 黄土滑坡诱发因素及其形成机理研究[J].工程地质学报, 2011, 19(4): 530-540. (ZHANG Mao-sheng, LI Tong-lu. Triggering factors and forming mechanism of loess landslides[J]. Journal of Engineering Geology, 2011, 19(4): 530-540. (in Chinese))
[6]	张茂省. 引水灌区黄土地质灾害成因机制与防控技术—以黄河三峡库区黑方台移民灌区为例[J]. 地质通报, 2013, 32(6): 833-839. (ZHANG Mao-sheng. Formation mechanism as well as prevention and controlling techniques of loess geo-hazards in irrigated areas: a case study of Heifangtai immigration area in the Three Gorges Reservoir of the Yellow River[J]. Geological Bulletin of China, 2013, 32(6): 833-839. (in Chinese))
[7]	王玉峰, 程谦恭, 黄英儒. 不同支护模式下黄土高边坡开挖变形离心模型试验研究[J]. 岩石力学与工程学报, 2014, 33(5): 1032-1046. (WANG Yu-feng, CHENG Qian-gong, HUANG Ying-ru. Centrifuge tests on excavation of high loess slope with different reinforcement modes[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(5): 1032-1046. (in Chinese))
[8]	陈晓平, 黄井武, 吴宏伟, 等. 库岸古滑坡离心模型试验研究[J]. 岩土工程学报, 2011, 33(10): 1496-1503. (CHEN Xiao-ping, HUANG Jing-wu, NG C W W, et al. Centrifugal model tests on ancient bank landslide[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(10): 1496-1503. (in Chinese))
[9]	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): 1261-1271. (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): 1261-1271. (in Chinese))
[10]	潘皇宋, 李天斌, 仵拨云, 等. 降雨条件下折线型滑面的大型滑坡稳定性离心模型试验[J/OL]. 岩土工程学报, http://www.cnki.net/kcms/detail/32.1124.TU.20150916.1817.020.html. (PAN Huang-song, LI Tian-bin, WU Bo-yun, et al. Centrifugal model test on large-scale landslide with broken-line slip surface under rainfall[J]. Chinese Journal of GeotechnicalEngineering,http://www.cnki.net/kcms/detail/32.1124.TU.20150916.1817.020.html. (in Chinese))
[11]	李邵军, KNAPPETT J A, 冯夏庭. 库水位升降条件下边坡失稳离心模型试验研究[J]. 岩石力学与工程学报, 2008, 27(8): 1586-1593. (LI Shao-jun,KNAPPETT J A,FENG Xia-ting. Centrifugal test on slope iistabilily influenced by riseand fall of reservoir water level[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(8): 1586-1593. (in Chinese))
[12]	张茂省, 程秀娟, 董英, 等. 冻结滞水效应及其促滑机理—以甘肃黑方台地区为例[J]. 地质通报, 2013, 32(6): 852-860. (ZHANG Mao-sheng, CHENG Xiu-juan, DONG Ying, et al. The effect of frozen stagnant water and its impact on slope stability: s case study of Heifangtai, Gansu Province[J]. Geological Bulletin of China, 2013, 32(6): 852-860. (in Chinese))