反倾岩质边坡块状–弯曲复合倾倒破坏分析方法研究

doi:10.13722/j.cnki.jrme.2022.0776

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (2133 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Due to the brittleness of rock and irregular joint，block-flexure is the most common type of toppling failure in anti-dip bedding rock slopes. Firstly，the failure mechanism of block-flexure toppling was clarified by centrifugal model test. A mechanical analysis model of block-flexure toppling was established. Then，based on the limit equilibrium method，the mechanical analytical formulas for the stability of continuous column and blocky column were derived respectively. The failure surface of block-flexure toppling was searched by the search algorithm. Finally，the whole analysis process was realized by MATLAB programming. The results show that the slope subjected to block-flexure toppling failure can be divided into four subzones(a toppling failure zone，a crack zone，a deformation zone and an unaffected zone). The failure surface of block-flexure toppling is stepped，and the height of these steps is equal to the multiple of the spacing of cross joints. It is found that the results of the theoretical analysis method are mutually verified with the results of centrifugal test. Then，the influencing factors were analyzed by the theoretical method. It is found that the inclination of cross-joint and inclination of slope face have a great influence on the scope of the first toppling failure zone；the thickness of column，tensile strength and the inclination of cross-joint have a great influence on the critical instability height. The research results can provide theoretical support for disaster prevention and control of the slope.

Key words： slope engineering anti-dip bedding rock slope block-flexure toppling failure limit equilibrium analytics solution

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHANG Haina1
	2
	3
	HU Ruiqi1
	2
	CHANG Jin3
	4
	CHEN Congxin5
	ZHENG Yun5
	WU Runfu1
	2
	JIANG Xinyue1
	2

Cite this article:

ZHANG Haina1,2,3, et al. Analytical analysis of block-flexure toppling failure of anti-dip #br# bedding rock slopes[J]. , 2023, 42(6): 1482-1496.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0776 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I6/1482

[3]	AMINI M，MAJDI A，VESHADI M A. Stability analysis of rock slopes against block-flexure toppling failure[J]. Rock Mechanics and Rock Engineering，2012，45(3)：519-532.
[4]	ALEJANO L R，GOMEZ-MARQUEZ I，MARTINEZ-ALEGRIA R. Analysis of a complex toppling-circular slope failure[J]. Engineering Geology，2010，114：93-104.
[6]	GOODMAN R E，BRAY J W. Toppling of rock slopes[C]// Proceeding of the Specialty Conference on Rock Engineering for Foundations and Slopes. Colorado：[s. n.]，1976：201-234.
[8]	ZHANG J H，CHEN Z Y，WANG X G. Centrifuge modeling of rock slopes susceptible to block toppling[J]. Rock Mechanics and Rock Engineering，2007，40(4)：363-382.
[10]	LIU C H，JAKSA M B，METERS A G. Toppling mechanisms of rock slopes considering stabilization from the underlying rock mass[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(8)：348-354.
[27]	FANG K，TANG H M，LI C，et al. Centrifuge modelling of landslides and landslide hazard mitigation：A review[J]. Geoscience Frontiers，2023，14：101493.
[1]	左保成. 反倾岩质边坡破坏机制研究[硕士学位论文][D]．北京：中国科学院，2004.(ZUO Baocheng. Study on losing stability mechanics of counter-tilt rock slopes[M. S. Thesis][D]. Beijing：Chinese Academy of Sciences，2004.(in Chinese))
[2]	卢海峰. 巴东组软岩边坡岩体工程特性及破坏机制研究[博士学位论文][D]. 北京：中国科学院研究生院，2010.(LU Haifeng. Research on engineering characteristics and failure mechanism of Badong formation soft rock slope[Ph. D. Thesis][D]. Beijing：University of Chinese Academy of Sciences，2010.(in Chinese))
[11]	BOBET A. Analytical solutions for toppling failure[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(2)：971-980.
[12]	AYDAN Ö，KAWAMOTO T. The stability of slopes and underground openings against flexural toppling and their stabilization[J]. Rock Mechanics Rock Engineering，1992，25(3)：143-165.
[14]	卢海峰，刘泉声，陈从新. 反倾岩质边坡悬臂梁极限平衡模型的改进[J]. 岩土力学，2012，33(2)：577-584.(LU Haifeng，LIU Quansheng，CHEN Congxin. Improvement of cantilever beam limit equilibrium model of counter-tilt rock slopes[J]. Rock and Soil Mechanics，2012，33(2)：577-584.(in Chinese))
[16]	赵维，王润清，年廷凯. 基于弯曲倾倒破坏模式的反倾岩质边坡稳定性解析方法[J]. 岩石力学与工程学报，2019，38(增2)：3 287- 3 295.(ZHAO Wei，WANG Runqing，NIAN Tingkai. Analytical method for stability of anti dip rock slope based on flexural toppling failure mode[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 287-3 295.(in Chinese))
[18]	ZHENG Y，CHEN C X，LIU T T，et al. Study on the mechanisms of flexural toppling failure in anti-inclined rock slopes using numerical and limit equilibrium models[J]. Engineering Geology，2018，237(4)：116-128.
[22]	AMINI M，GHOLAMZADEH M，KHOSRAVI M. Physical and theoretical modeling of rock slopes against block-flexure toppling failure[J]. International Journal of Mining and Geo-Engineering，2015，49(2)：155-171.
[5]	HUANG R Q，LI W L. Formation，distribution and risk control of landslides in China[J]. Journal of Rock Mechanics and Geotechnical Engineering，2011，3(2)：97-116.
[7]	汪小刚，张建红，赵毓芝，等. 用离心模型研究岩石边坡的倾倒破坏[J]. 岩土工程学报，1996，18(5)：14-21.(WANG Xiaogang，ZHANG Jianhong，ZHAO Yuzhi，et al. Investigations on mechanism of slope toppling failure by centrifuge model testing[J]. Chinese Journal of Geotechnical Engineering，1996，18(5)：14-21.(in Chinese))
[9]	LIU C H，JAKSA M B，METERS A G. A transfer coefficient method for rock slope toppling[J]. Canadian Geotechnical Journal，2009，46(1)：1-9.
[17]	AMINI M，MAJDI A. AYDAN Ö. Stability analysis and the stabilization of flexural toppling failure[J]. Rock Mechanics and Rock Engineering，2009，42(2)：751-782.
[19]	陈从新，郑允，孙朝燚. 岩质反倾边坡弯曲倾倒破坏分析方法研究[J]. 岩石力学与工程学报，2016，35(11)：2 174-2 187.(CHEN Congxin，ZHENG Yun，SUN Chaoyi. Research on the analytical approach of rock layered counter-tilt slope flexural toppling failure[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 174-2 187.(in Chinese))
[29]	XIA K Z，CHEN C X，WANG T L，et al. Estimating the geological strength index and disturbance factor in the Hoek-Brown criterion using the acoustic wave velocity in the rock mass[J]. Engineering Geology，2022，306：106745.
[13]	ADHIKARY D P，DYSKIN A V. A study of the mechanism of flexural toppling failure of rock slopes[J]. Rock Mechanics and Rock Engineering，1997，30(2)：75-93.
[15]	蔡静森，晏鄂川，王章琼. 反倾层状岩质边坡悬臂梁极限平衡模型研究[J]. 岩土力学，2014，35(增1)：15-28.(CAI Jingsen，YAN Echuan，WANG Zhangqiong. Study of cantilever beam limit equilibrium model of anti-dip layered rock slopes[J]. Rock and Soil Mechanics，2014，35(Supp.1)：15-28.(in Chinese))
[25]	邱俊，任光明，王云南. 层状反倾-顺倾边坡倾倒变形形成条件及发育规模特征[J]. 岩土力学，2016，37(增2)：513-524.(QIU Jun，REN Guangming，WANG Yunnan. Characteristics of forming conditions and development scale of toppling in anti-dip and dip stratified slopes[J]. Rock and Soil Mechanics，2016，37(Supp.2)：513-524.(in Chinese))
[20]	ZHENG Y，CHEN C X，MENG F，et al. Assessing the stability of rock slopes with respect to flexural toppling failure using a limit equilibrium model and genetic algorithm[J]. Computers and Geotechnics，2020，124：103619.
[21]	AMINI M，ARDESTANI A，KHOSRAVI M. Stability analysis of slide-toe-toppling failure[J]. Engineering Geology，2017，228(13)：82-96.
[24]	ZHANG H N，XU X Y，CHEN C X，et al. Experimental and numerical study of the mechanism of block-flexure toppling failure in rock slopes[J]. Bulletin of Engineering Geology and the Environment，2022，81(1)：1-15.
[26]	ZHANG J H，LI F，ZHANG S P，et al. Research on Application of Multi-channel Selector in Centrifugal model test of anchoring slope by frame beam[J]. Frontiers in Earth Science，2021，9：757724.
[28]	AYDAN Ö，AMINI M. An experimental study on rock slopes against flexural toppling failure under dynamic loading and some theoretical considerations for its stability assessment[J]. Journal of the School of Marine Science and Technology Tokai University，2009，7：25-40.
[30]	ZHAO J S，JIANG Q，PEI S F，et al. Microseismicity and focal mechanism of blasting-induced block falling of intersecting chamber of large underground cavern under high geostress[J]. Journal of Central South University，2023，https://doi.org/10.1007/s11771- 023-5259-y.
[23]	ZHANG H N，CHEN C X，ZHENG Y，et al. Centrifuge modeling of layered rock slopes susceptible to block-flexure toppling failure[J]. Bulletin of Engineering Geology and the Environment，2020，79： 3 815-3 831.