加锚隐伏顺层岩质边坡滑剪破坏分析方法研究

doi:10.13722/j.cnki.jrme.2023.0127

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

Download: PDF (1271 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Fully-grouted bolts are widely used in slope reinforcement projects，but the anchoring mechanism and evaluation method of bolt-supported concealed bedding rock slopes need to be developed and improved. In this work，a new columnar mechanical model was established according to the sliding shear failure mechanism of bolt-supported concealed bedding rock slopes. Subsequently，the stability analysis method of such slopes was proposed using the limit equilibrium approach combined with the resistance contribution of the bolts. On this basis，the effects of the bolt angle and diameter on the stability of the bolted slopes were discussed. In addition，the analytical results were compared with those calculated by the discrete element modeling(UDEC). The results show that the tensile-shear coupling of the fully-grouted bolts increases the slip resistance of the sliding body. There is an optimal bolt angle that maximizes the stability of the bolted concealed bedding rock slopes，with a value approximately equal to the friction angle of the bedding plane. The slope stability also increases with increasing the bolt diameter by a power function. The simulation and analytical results are in good agreement，thus verifying the rationality and accuracy of the proposed analysis method. The research results are of guidance for stability evaluation and treatment design of this type of slope.

Key words： slope engineering fully grouted bolts rock slopes concealed bedding slopes limit equilibrium analysis method

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	SUN Chaoyi
	CHEN Congxin
	ZHENG Yun
	LIU Caihua

Cite this article:

SUN Chaoyi,CHEN Congxin,ZHENG Yun, et al. A stability analysis method of bolt-supported concealed bedding rock slopes against sliding shear failure[J]. , 2023, 42(10): 2456-2465.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0127 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I10/2456

[1] 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)：1 023–1 030. (XIAO Shirong，LIU Defu，JIANG Fuxing，et al. Geomechanical model experiment on Qianjiangping Landslide in Three Gorges Reservoie Area[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：1 023–1 030.(in Chinese))
[2] 李红卫. 陡倾顺层路堑高边坡变形破坏机制分析[J]. 岩土工程学报，2011，33(增1)：146–151.(LI Hongwei. Deformation and failure mechanism of steeply dipping bedding high slopes[J]. Chinese Journal of Geotechnical Engineering，2011，33(Supp.1)：146–151.(in Chinese))
[3] LI B，HUANG D，ZHU Y Z. A complex slide-buckling-toppling failure of under-dip soft rock slopes[J]. European Journal of Environmental and Civil Engineering，2022，26(9)：4 146–4 169.
[4] SUN C，CHEN C，ZHENG Y，et al. Numerical and theoretical study of bi-planar failure in footwall slopes[J]. Engineering Geology，2019，260：105234.
[5] SUN C，CHEN C，ZHENG Y，et al. Analysis of stability of concealed cataclinal slopes with talus deposits accumulated at their toes with respect to biplanar failure[J]. International Journal of Geomechanics，2021，21(11)：04021219.
[6] 黄润秋. 20 世纪以来中国的大型滑坡及其发生机制[J]. 岩石力学与工程学报，2007，26(3)：433–454.(HUANG Runqiu. Large-scale landslides and their sliding mechanisms in China since the 20th century[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：433–454.(in Chinese))
[7] WENG M C，LO C M，WU C H，et al. Gravitational deformation mechanisms of slate slopes revealed by model tests and discrete element analysis[J]. Engineering Geology，2015，189：116–132.
[8] LO C M，WENG M C. Identification of deformation and failure characteristics in cataclinal slopes using physical modeling[J]. Landslides，2017，14(2)：499–515.
[9] 李晓，张年学，盛祝平，等. 武隆鸡尾山滑坡发生机制与裂缝成因分析[J]. 岩石力学与工程学报，2020，39(1)：1–12.(LI Xiao，ZHANG Nianxue，SHENG Zhuping，et al. Sliding mechanisms and fracture genesis of Jiweishan landslide in Wulong[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(1)：1–12.(in Chinese))
[10] HAVAEJ M，WOLTER A，STEAD D. The possible role of brittle rock fracture in the 1963 Vajont Slide，Italy[J]. International Journal of Rock Mechanics and Mining Sciences，2015，78：319–330.
[11] ALEJANO L R，FERRERO A M，RAMÍREZ-OYANGUREN P，et al. Comparison of limit-equilibrium，numerical and physical models of wall slope stability[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(1)：16–26.
[12] FISHER B R. Improved characterization and analysis of bi-planar dip slope failures to limit model and parameter uncertainty in the determination of setback distances[Ph. D. Thesis][D]. Columbia：University of British Columbia，2009.
[13] HAVAEJ M，STEAD D，EBERHARDT E，et al. Characterization of bi-planar and ploughing failure mechanisms in footwall slopes using numerical modelling[J]. Engineering Geology，2014，178：109–120.
[14] 闫国强，殷跃平，黄波林，等. 三峡库区顺层灰岩岸坡劣化–溃屈灾变机制研究[J]. 岩土力学，2022，43(9)：2 568–2 580.(YAN Guoqiang，YIN Yueping，HUANG Bolin，et al. Deterioration-buckling failure mechanism of consequent bedding limestone bank slope in Three Gorges Reservoir area[J]. Rock and Soil Mechanics，2022，43(9)：2 568–2 580.(in Chinese))
[15] 杨肖锋，鲁祖德，陈从新，等. 板裂结构顺层岩质边坡滑移–弯曲破坏机制的力学模型研究[J]. 岩土力学，2022，43(增1)：258–266. (YANG Xiaofeng，LU Zude，CHEN Congxin，et al. Analysis of mechanical model of sliding-bending failure in bedding rock slopes with slab-rent structure[J]. Rock and Soil Mechanics，2022，43(Supp.1)：258–266.(in Chinese))
[16] 任光明，夏敏，李果，等. 陡倾顺层岩质斜坡倾倒变形破坏特征研究[J]. 岩石力学与工程学报，2009，28(增1)：3 193–3 200. (REN Guangming，XIA Min，LI Guo，et al. Study on toppling deformation and failure characteristics of steep bedding rock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：3 193–3 200.(in Chinese))
[17] 陈晓磊. 双滑面岩质边坡稳定性极限平衡计算方法[J]. 地下空间与工程学报，2016，12(5)：1 403–1 409.(CHEN Xiaolei. Quasi-static analysis of seismic stability of rock slope with double slide blocks[J]. Chinese Journal of Underground Space and Engineering，2016，12(5)：1 403–1 409.(in Chinese))
[18] 陈龙龙. 双组交错结构面型顺层岩质边坡失稳机制研究[硕士学位论文][D]. 北京：中国矿业大学(北京)，2018.(CHEN Longlong. Study on the instability mechanism of bedding rock slope with two groups pf crossover structures[M. S. Thesis][D]. Beijing：China University of Geosciences(Beijing)，2018.(in Chinese))
[19] GRASSELLI G. 3D Behaviour of bolted rock joints：experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(1)：13–24.
[20] LIU C H，LI Y Z. Analytical study of the mechanical behavior of fully grouted bolts in bedding rock slopes[J]. Rock Mechanics and Rock Engineering，2017，50：2 413–2 423.
[21] 王发玲，刘才华，龚哲. 顺层岩质边坡锚杆支护机制研究[J]. 岩石力学与工程学报，2014，33(7)：1 465–1 470.(WANG Faling，LIU Caihua，GONG Zhe. Mechanisms of bolt support for bedding rock slopes[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(7)：1 465–1 470.(in Chinese))
[22] 李育宗，刘才华. 拉剪作用下节理岩体锚固力学分析模型[J]. 岩石力学与工程学报，2016，35(12)：2 471–2 478.(LI Yuzong，LIU Caihua. An analytical model of jointed rock bolts under the combination of tensile and shear loads[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(12)：2 471–2 478.(in Chinese))
[23] 周炜，李海波，刘亚群，等. 地震作用下顺层岩质边坡锚固特性的拟动力分析[J]. 岩石力学与工程学报，2016，35(增2)：3 570–3 576.(ZHOU Wei，LI Haibo，LIU Yaqun，et al. Pseudo-dynamic analysis of anchored characteristics of layered rock slopes subjected to seismic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：3 570–3 576.(in Chinese))
[24] 廖峻，李江腾，郝瑞卿，等. 顺层岩质边坡稳定性及预应力锚杆加固研究[J]. 中南大学学报：自然科学版，2014，45(1)：231–236. (LIAO Jun，LI Jiangteng，HAO Ruiqing，et al. Stability of consequent rock slopes and analysis of prestressed anchors reinforcement[J]. Journal of Central South University：Science and Technology，2014，45(1)：231–236.(in Chinese))
[25] 蒋明镜，江华利，廖优斌，等. 顺层岩质边坡锚杆加固机制离散元分析[J]. 湖南大学学报：自然科学版，2018，45(增)：144–149.(JIANG Mingjing，JIANG Huali，LIAO Youbin，et al. DEM analysis on bolt reinforcement mechanism of bedding rock slope[J]. Journal of Hunan University：Natural Sciences，2018，45(Supp.)：144–149.(in Chinese))
[26] ZHAO L H，LI D J，TAN H H，et al. Characteristics of failure area and failure mechanism of a bedding rockslide in Libo County，Guizhou，China[J]. Landslides，2019，16(7)：1 367–1 374.
[27] 李得建，贾文韬，程肖，等. 阶梯状滑动断续节理顺层边坡稳定性分析[J]. 岩土工程学报，2022，44(11)：2 125–2 134.(LI Dejian，JIA Wentao，CHENG Xiao，et al. Stability of stepped sliding of bedding rock slopes with discontinuous joints[J]. Chinese Journal of Geotechnical Engineering，2022，44(11)：2 125–2 134.(in Chinese))
[28] 中华人民共和国国家标准编写组. GB/T 50218—2014工程岩体分级标准[S]. 北京：中国计划出版社，2014.(The National Standards Compilation Group of People?s Republic of China. GB/T 50218—2014 Standard for engineering classification of rock mass[S]. Beijing：China Planning Press，2014.(in Chinese))
[29] 中华人民共和国国家标准编写组. GB/T 32864—2016滑坡防治工程勘查规范[S]. 北京：中国标准出版社，2016.(National Standards Compilation Group of People?s Republic of China. GB/T 32864—2016 Code for geological investigation of landslide prevention[S]. Beijing：Standards Press of China，2016.(in Chinese))
[30] ZHENG Y，CHEN C，LIU T，et al. Stability analysis of anti-dip bedding rock slopes locally reinforced by rock bolts[J]. Engineering Geology，2019，251：228–240.