Simulation on the Deformation and Failure Mechanism of Yunpantou Landslide, Guizhou

ZHANG Ling-xi; CHEN Jun; LIU Lian-jia; WANG Qi; CHI Chang-feng

doi:10.11988/ckyyb.20171097

PDF(3264 KB)

Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (11) : 27-33. DOI: 10.11988/ckyyb.20171097

ENGINEERING SAFETY AND DISASTER PREVENTION

Simulation on the Deformation and Failure Mechanism of Yunpantou Landslide, Guizhou

ZHANG Ling-xi¹, CHEN Jun², LIU Lian-jia³, WANG Qi¹, CHI Chang-feng¹

Author information +

History +

Abstract

The instability of gently inclined bedding rock slope is difficult to be recognized and detected because of its gentle dip angle. The Yunpantou landslide in Guizhou, China, is a typical gentle dip bedding rock slope with four sets of weak intercalated layers in the slope. Probing into its deformation and failure mechanism is of practical significance for the research of gently inclined bedding rock slope failure. In this paper, the deformation and failure mechanism of Yunpantou landslide is examined by establishing a geological structural model based on engineering geological survey in association with various approaches such as bottom friction test, two-dimensional discrete and finite element simulations. Results reveal that the deformation and failure process of landslide can be divided into four stages, namely, microcrack growth stage, crack propagation stage, landslide deformation stage, and complete destruction stage. Key blocks exist in slope toe. The main causes of the landslide can be depicted as the exposure of weak intercalated layers resulted from excavation, and tension cracks perpendicular to the weak layers developed and divided the sliding body into blocks; with the sliding of key blocks in slope toe towards the free face, secondary blocks moves correspondingly and generates a Domino effect leading to the integral sliding of slope, which, therefore, is a typical sliding tension landslide.

Key words

gently inclined bedding rock slope / engineering geological investigation / geological model of slope / bottom friction test / slip tension crack / Yunpantou landslide

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

ZHANG Ling-xi, CHEN Jun, LIU Lian-jia, WANG Qi, CHI Chang-feng. Simulation on the Deformation and Failure Mechanism of Yunpantou Landslide, Guizhou[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(11): 27-33 https://doi.org/10.11988/ckyyb.20171097

References

[1] 苏新建,陈筠,郭果.贵州某缓倾顺层岩质边坡稳定性分析与评价[J].贵州大学学报(自然科学版),2013,30(1):111-115,125.
[2] 吉世祖. 缓倾外软硬互层型滑坡失稳机理研究[D].成都:成都理工大学,2015.
[3] 黄润秋,王峥嵘,许强.反倾向岩质边坡变形破坏规律分析[M].成都:西南交通大学出版社,1994.
[4] 蔡国军,黄润秋,严明,等. 反倾向边坡开挖变形破裂响应的物理模拟研究[J]. 岩石力学与工程学报,2008,27(4):811-817.
[5] 董云,黄湖锋,柴贺军,等. 土石混填路基变形破坏机制的底摩擦试验模拟[J]. 中南公路工程,2006,31(4):4-8.
[6] 石豫川,冯文凯,冯学钢,等. 国道108线某段缓倾角顺层边坡变形破坏机制物理模拟研究[J]. 成都理工大学学报(自然科学版),2003,30(4):350-355.
[7] 冯文凯,石豫川,柴贺军,等.斜坡填筑路堤变形破坏物理模拟研究[J].岩石力学与工程学报,2006,25(增1):2861-2867.
[8] 易志坚,黄润秋,吴海燕,等.唐古栋滑坡成因机制研究[J]. 工程地质学报,2016, 24(6):1072-1079.
[9] 首钢地质勘察设计院.首黔公司200万t/a焦化项目一步焦化地基处理及场平工程挖、填方边坡勘察报告[R].北京:首钢地质勘察设计院,2010.
[10]许强,陈建君,冯文凯,等. 斜坡地震响应的物理模拟试验研究[J]. 四川大学学报(工程科学版),2009,41(3):266-272.
[11]苗朝,沈军辉,杨佳丽,等. 雅砻江甲西滑坡倾倒弯曲-拉裂形成机制研究[J]. 防灾减灾工程学报,2015,35(3):411-417.
[12]刘洋,唐鸣发,王亚昆. 电站坝址下游滑坡变形破坏机制物理模拟研究[J]. 水资源与水工程学报,2012,23(2):100-103.
[13]孔超群. 圣维南原理研究工作综述[J]. 上海力学,1990,11(3):35-40.
[14]周跃峰,龚壁卫,周小文,等. 某加筋土边坡离心模型试验相似材料研究[J]. 长江科学院院报,2017,34(2):52-55,62.
[15]肖诗荣,刘德富,姜福兴,等. 三峡库区千将坪滑坡地质力学模型试验研究[J]. 岩石力学与工程学报,2010,29(5):1023-1030.
[16]张林,刘小强,陈建叶,等. 复杂地质条件下拱坝坝肩稳定地质力学模型试验研究[J]. 四川大学学报(工程科学版),2004,36(6):1-5.
[17]陈进,赖跃强. 隔河岩重力拱坝加固方案地质力学模型试验研究[J]. 长江科学院院报,1993,10(1):36-43.
[18]姜小兰,陈进,孙绍文,等.锦屏工程地质力学模型坝基岩体新型材料研究[J].长江科学院院报,2009,26(6):40-43.
[19]刘鹏,吉锋,温书亿. 隧道水平岩层变形破坏机制的模拟研究[J]. 现代隧道技术,2015,52(3):82-87.
[20]兰志勇,赵建军,翟崇,等. 软弱基座型斜坡变形破坏机制模拟研究[J]. 工程地质学报,2014,22(3):421-427.
[21]许源华,陈筠.贵州遵义某软硬互层岩质边坡崩塌破坏机制数值模拟研究[J].贵州大学学报(自然科学版),2015,32(6):34-39.
[22]张丽华,陈筠,余波,等.澜沧江藏东流域岩体结构面分形研究[J].人民长江,2016,47(4):37-42.