Model tests and numerical analysis of slopes reinforced by short anti-sliding piles

ZENG Hong-yan; HAN Li-biao; ZHOU Cheng; LIU Wei; TAN Chang-ming

doi:10.11779/CJGE2020S1026

Volume 42 Issue S1

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2020 > 42(S1): 132-136. > DOI: 10.11779/CJGE2020S1026

ZENG Hong-yan, HAN Li-biao, ZHOU Cheng, LIU Wei, TAN Chang-ming. Model tests and numerical analysis of slopes reinforced by short anti-sliding piles[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 132-136. DOI: 10.11779/CJGE2020S1026

Citation:

PDF (1405 KB)

Model tests and numerical analysis of slopes reinforced by short anti-sliding piles

ZENG Hong-yan^{1, 2,},
HAN Li-biao^{1, 2},
ZHOU Cheng^{1, 2, ,},
LIU Wei^{1, 2},
TAN Chang-ming³

1.
State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Chengdu 610065, China
2.
College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
3.
Sichuan Provincial Highway Planning, Survey, design and Research Institute, Co., Ltd., Chengdu 610041, China

More Information

Received Date: June 04, 2020
Available Online: December 07, 2022

Graphical Abstract

Abstract

Abstract

As an active protective structure for landslide prevention, the short anti-sliding piles have been gradually developed and applied in the engineering field. However, this kind of structure is only suitable for landslides where the strength of the sliding mass is obviously greater than that of the sliding surface, and there is also no shallow landslides. The rainfall-induced landslides are generally shallow ones, which limits the application of short anti-sliding piles. For the slopes improved by anti-sliding piles, three kinds of groups model tests are conducted under natural conditions. A single row of short anti-sliding piles are installed with different pile lengths (0, 18 and 28 cm) for reinforcing the non-cohesive soil slope. The PFC^2D particle flow software is used to simulate deformation of the soil slope. By analyzing the displacement of sliding body and the variation of the sliding surface, the reinforcement mechanism of the short anti-sliding piles with different lengths in the soil slope is studied. The results calculated by the discrete element numerical analysis method are close to those of the model tests. The results show that the short anti-sliding piles can effectively strengthen the soil slopes. With the increase of the length of short anti-sliding piles, the scope of the reinforced soil gradually increases, and the slip surface gradually rises along the vertical slope direction. However when the length reaches a certain value, the rising rate of the slip surface begins to decrease. The slope reinforced by the short anti-sliding piles still has the tendency of shallow sliding. If the pile length is too short, the slope soil will easily slide over the top of the pile. For the possible slope failure of overtopping and shallow sliding, it is suggested that the short anti-sliding piles should be used together with the retaining wall at the slope toe.
- short anti-sliding pile,
- model test,
- particle flow,
- numerical analysis,
- sliding of slope soil

FullText(HTML)

References (10)

References

[1]	雷用, 郑颖人, 陈克勤. “抗滑短桩”概念及其受力影响探讨[J]. 地下空间与工程学报, 2009(3): 608-615. doi: 10.3969/j.issn.1673-0836.2009.03.038 LEI Yong, ZHENG Ying-ren, CHEN Ke-qin. Inquiring the concept and loading influence of short anti-sliding pile[J]. Chinese Journal of Underground Space and Engineering, 2009(3): 608-615. (in Chinese) doi: 10.3969/j.issn.1673-0836.2009.03.038
[2]	梁丰收, 何光春, 刘明维, 等. 埋入式抗滑桩在三峡库区斜坡码头岸坡中的应用[J]. 港工技术, 2009, 46(5): 17-19. doi: 10.3969/j.issn.1004-9592.2009.05.006 LIANG Feng-shou, HE Guang-chun, LIU Ming-wei, et al. Application of embedded anti-slide pile in sloping wharf of Three Gorges Reservoir region[J]. Port Engineering Technology, 2009, 46(5): 17-19. (in Chinese) doi: 10.3969/j.issn.1004-9592.2009.05.006
[3]	蔡强, 李乾坤, 石胜伟, 等. 钢管抗滑短桩受力特性物理模型试验研究[J]. 岩土力学, 2016, 37(增刊2): 679-684. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2016S2086.htm CAI Qiang, LI Qian-kun, SHI Sheng-wei, et al. Study of mechanical characteristics of short anti-sliding steel pipe pile by physical model test[J]. Rock and Soil Mechanics, 2016, 37(S2): 679-684. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2016S2086.htm
[4]	宋雅坤, 郑颖人, 雷文杰. 沉埋式抗滑桩机制模型试验数值分析研究[J]. 岩土力学, 2007, 28(增刊1): 63-68. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2007S1013.htm SONG Ya-kun, ZHENG Ying-ren, LEI Wen-jie. Analysis of the experimental mechanism of deeply buried anti-slide pile by FEM[J]. Rock and Soil Mechanics, 2007, 28(S1): 63-68. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2007S1013.htm
[5]	胡峰, 何坤. 沉埋式双排抗滑桩受力及沉埋深度有限元分析[J]. 路基工程, 2013(5): 152-154, 158. doi: 10.3969/j.issn.1003-8825.2013.05.038 HU Feng, HE Kun. Analysis on stress and burying depth of double-row deeply buried anti-slide piles by FEM[[J]. Subgrade Engineering, 2013(5): 152-154, 158. (in Chinese) doi: 10.3969/j.issn.1003-8825.2013.05.038
[6]	胡时友, 蔡强, 李乾坤, 等. 抗滑短桩加固滑坡体模型试验三维数值模拟分析[J]. 工程地质学报, 2018, 26(4): 969-977. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201804017.htm HU Shi-you, CAI Qiang, LI Qian-kun, et al. Three dimensional FEM simulation of slope reinforcement by short anti-sliding pile[J]. Journal of Engineering Geology, 2018, 26(4): 969-977. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201804017.htm
[7]	唐晓松, 郑颖人, 邱文平. 多排抗滑桩治理工程的有限元设计计算与优化[J]. 防灾减灾工程学报, 2011, 31(5): 548-554. TANG Xiao-song, ZHENG Ying-ren, QIU Wen-ping. FEM design and calculation in the governance engineering of anti-slide piles[J]. Journal of Disaster Prevention and Mitigation Engineering, 2011, 31(5): 548-554. (in Chinese)
[8]	雷用, 许建, 郑颖人. 抗滑短桩的适用条件研究[J]. 地下空间与工程学报, 2010, 6(增刊): 1647-1651, 1664. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE2010S2034.htm LEI Yong, XU Jian, ZHENG Ying-ren. Suitable conditions analysis of short anti-sliding pile[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(S2): 1647-1651, 1664. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE2010S2034.htm
[9]	韩利彪. 坡积土剪切层变形控制及生态护岸初步研究[D]. 成都: 四川大学, 2016. HAN Li-biao. Preliminary Study on Deformation Controlling of Shearing Zone and Vegetated Revetment of Slope Soil[D]. Chengdu: Sichuan University, 2016. (in Chinese)
[10]	刘伟. 根垫层锚拉仿生根生态护坡初步研究[D]. 四川成都: 四川大学, 2016. LIU Wei. Preliminary Study on Artificial Roots Combined with Roots-cushion by Prestressed Cable in Biotechnical Slope Protection[D]. Chengdu: Sichuan University, 2016. (in Chinese)