反倾层状岩质边坡块状–弯曲倾倒变形演化过程试验研究

doi:10.13722/j.cnki.jrme.2023.0870

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摘要为研究三江并流地区某反倾岩质边坡在复杂内外动力共同作用下的倾倒变形破坏机制，开展相似材料物理模型试验并着重研究反倾岩质边坡在构造应力、河流快速下切以及降雨条件下发生块状–弯曲倾倒变形失稳的各阶段演化过程。结合离散元数值试验分析边坡岩层在各工况下的宏观变形特征、关键点的位移变化规律、最大弯折面的演化、岩层塑性区的分布等。结果表明：(1) 试验与模拟结果吻合较好，倾倒变形演化过程分为坡趾剪切弯曲→出现最大弯折面→弯折面上部岩层弯曲倾倒→主破裂面贯通4个阶段；(2) 坡趾区域首先发生浅层块状倾倒，伴随最大弯折面的贯通，弯折面上部岩层呈现叠网状的深层弯曲倾倒，下部岩层则相对稳定，体现反倾岩层的自稳性特征；(3) 河流下切作用是反倾岩质边坡形成弯曲倾倒变形的前提条件，而降雨作用加快了倾倒体从蠕变阶段向累进破坏阶段的过渡，最终导致岩层发生倾倒失稳。

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	龚逸非1
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	姚爱军1
	李彦霖1
	朱淳2
	李慧1

关键词 ：边坡工程, 反倾岩质边坡, 块状&ndash, 弯曲倾倒, 外部加载, 演化过程, 破坏机制

Abstract：In order to study the toppling deformation and failure mechanism of an anti-dip rock slope in the Three Parallel Rivers area under the combined action of complex internal and external forces. The physical model test of similar materials is carried out，and the evolution process of block-flexure toppling deformation and instability of the anti-dip rock slope under tectonic stress，rapid river downcutting and rainfall conditions is studied. Combined with the discrete element numerical test，the macroscopic deformation characteristics of the slope rock stratum under various working conditions，the displacement variation law of the key points，the evolution of the maximum flexure surface，and the distribution of the plastic zone of the rock stratum are analysed. The results show that：(1) The test results are in good agreement with the simulation results. The evolution process of toppling deformation is divided into four stages：shear flexure of slope toe→maximum flexure surface→flexure and toppling of rock strata under flexure surface→penetration of main fracture surface. (2) The shallow block toppling first occurs in the slope toe area. With the penetration of the maximum flexure surface，the lower strata of the flexure surface show a deep flexure toppling of the laminated network，and the upper strata are relatively stable，which reflects the self-stability characteristics of the anti-dip rock slope. (3) River undercutting is a prerequisite for the formation of flexure toppling deformation of anti-dip rock slope，and rainfall aggravates the transition of toppling body from creep stage to progressive failure stage，which eventually leads to toppling instability of rock strata.

Key words： slope engineering anti-dip rock slope block-flexural toppling external loading evolution process mechanism of destruction

引用本文:

龚逸非1，2，姚爱军1，李彦霖1，朱淳2，李慧1. 反倾层状岩质边坡块状–弯曲倾倒变形演化过程试验研究[J]. 岩石力学与工程学报, 2024, 43(10): 2497-2510.
GONG Yifei1，2，YAO Aijun1，LI Yanlin1，ZHU Chun2，LI Hui1. Experimental study on block-flexure toppling deformation evolution process of anti-dip layered rock slopes. , 2024, 43(10): 2497-2510.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0870 或 https://rockmech.whrsm.ac.cn/CN/Y2024/V43/I10/2497

[1]	黄润秋，李渝生，严明. 斜坡倾倒变形的工程地质分析[J]. 工程地质学报，2017，25(5)：1 165-1 181.(HUANG Runqiu，LI Yusheng，YAN Ming. The implication and evaluation of toppling failure in engineering geology practice[J]. Journal of Engineering Geology，2017，25(5)：1 165-1 181.(in Chinese))
[2]	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.
[3]	彭建兵，崔鹏，庄建琦. 川藏铁路对工程地质提出的挑战[J]. 岩石力学与工程学报，2020，39(12)：2 377-2 389.(PENG Jianbing，CUI Peng，ZHUANG Jianqi. Challenges to engineering geology of Sichuan—Tibet railway[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(12)：2 377-2 389.(in Chinese))
[4]	戴福初，邓建辉. 青藏高原东南三江流域滑坡灾害发育特征[J]. 工程科学与技术，2020，52(5)：3-15.(DAI Fuchu，DENG Jianhui. Development characteristics of landslide hazards in three-rivers basin of southeast Tibetan plateau[J]. Advanced Engineering Sciences，2020，52(5)：3-15.(in Chinese))
[5]	NING Y B，TANG H M，SMITH J V，et al. Study of the in-situ stress field in a deep valley and its influence on rock slope stability in Southwest China[J]. Bulletin of Engineering Geology and the Environment，2021，80：3 331-3 350.
[6]	GOODMAN R E，BRAY J W. Toppling of rock slopes[C]// Proceedings of ASCE Specialty Conference，Rock Engineering for Foundations and Slopes. Colorado：Boulder，1976：201-234.
[7]	GORICKI A，GOODMAN R E. Failure modes of rock slopes demonstrated with base friction and simple numerical models[J]. Felsbau，2003，21(2)：25-30.
[8]	NICHOL S L，HUNGR O，EVANS S G. Large-scale brittle and ductile toppling of rock slopes[J]. Canadian Geotechnical Journal，2002，39：773-788.
[9]	王思敬. 金川露天矿边坡变形机制及过程[J]. 岩土工程学报，1982，4(1)：76-83.(WANG Sijing. On the mechanism and process of slope deformation in an open pit mine[J]. Chinese Journal of Geotechnical Engineering，1982，4(1)：76-83.(in Chinese))
[10]	张丙先. 西藏玉曲河下游岸坡倾倒变形机制及稳定性分析[J]. 吉林大学学报：地球科学版，2018，48(5)：1 539-1 545.(ZHANG Binxian. Deformation mechanism and stability analysis of bank slope in downstream of Yuqu river in Tibet[J]. Journal of Jilin University：Earth Science Edition，2018，48(5)：1 539-1 545.(in Chinese))
[11]	王飞，唐辉明，宁奕冰，等. 基于演化过程的互层斜坡深层倾倒稳定性评价[J]. 地质科技情报，2019，38(5)：186-194.(WANG Fei，TANG Huiming，NING Yibing，et al. Stability analysis of deep-seated toppling in interlayered rock slopes based on evolution process[J]. Geological Science and Technology Information，2019，38(5)：186-194.(in Chinese))
[12]	宁奕冰. 澜沧江中上游深层倾倒体变形失稳过程及稳定性评价研究[博士学位论文][D]. 武汉：中国地质大学，2022.(NING Yibing. Study on the deformation and instability process and stability evaluation of deepseated toppling in the upper-middle Lancang River[Ph. D. Thesis][D]. Wuhan：China University of Geosciences，2022.(in Chinese))
[13]	NING Y B，TANG H M，ZHANG G C，et al. A complex rockslide developed from a deep-seated toppling failure in the upper Lancang River，Southwest China[J]. Engineering Geology，2021，293：106329
[14]	张世殊，裴向军，王仁坤，等. 狮子坪水电站二古溪倾倒边坡成因机制分析[J]. 长江科学院院报，2014，31(11)：60-65.(ZHANG Shishu，PEI Xiangjun，WANG Renkun，et al. Formation mechanism of Erguxi toppling slope at Shiziping hydropower station[J]. Journal of Yangze River Scientific Research Institute，2014，31(11)：60-65.(in Chinese))
[15]	AMINI M，GOLAMZADEH 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.
[16]	郭明珠，王晨，谷坤生，等. 薄厚岩组合型边坡动力响应与破坏机制的振动台模型试验研究[J]. 岩石力学与工程学报，2022，41(11)：2 173-2 185.(GUO Mingzhu，WANG Chen，GU Kunsheng，et al. Shake table model test study on dynamic response and damage mechanism of slopes with thin and thick rock combination[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(11)：2 173-2 185.(in Chinese))
[17]	谷坤生，郭明珠，唐学武，等. 地震作用下反倾岩质斜坡动力响应规律及频谱特征研究[J]. 地震工程学报，2022，44(1)：62-71.(GU Kunsheng，GUO Mingzhu，TANG Xuewu，et al. Dynamic response and spectrum characteristics of anti-dip rock slopes under earthquake[J]. China Earthquake Engineering Journal，2022，44(1)：62-71.(in Chinese))
[18]	黄达，马昊，孟秋杰，等. 软硬互层岩质反倾边坡弯曲倾倒离心模型试验与数值模拟研究[J]. 岩土工程学报，2020，42(7)：1 286-1 295.(HUANG Da，MA Hao，MENG Qiujie，et al. Centrifugal model test and numerical simulation for anaclinal rock slopes with soft-hard interbedded structures[J]. Chinese Journal of Geotechnical Engineering，2020，42(7)：1 286-1 295.(in Chinese))
[19]	黄达，谢周州，宋宜祥，等. 软硬互层状反倾岩质边坡倾倒变形离心模型试验研究[J]. 岩石力学与工程学报，2021，40(7)：1 357-1 368.(HUANG Da，XIE Zhouzhou，SONG Yixiang，et al. Centrifuge model test study on toppling deformation of anti-dip soft-hard interbedded rock slopes[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(7)：1 357-1 368.(in Chinese))
[20]	宁奕冰，唐辉明，张勃成，等. 澜沧江深层倾倒体演化过程及失稳机制研究[J]. 岩石力学与工程学报，2021，40(11)：2 199-2 213. (NING Yibing，TANG Huiming，ZHANG Bocheng，et al. Evolution process and failure mechanism of a deep-seated toppling slope in the Lancang River Basin[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 199-2 213.(in Chinese))
[21]	NING Y B，TANG H M，WANG F，et al. Sensitivity analysis of toppling deformation for interbedded anti-inclined rock slopes based on the Grey relation method[J]. Bulletin Engineering Geology and Environment，2019，78：6 017-6 032.
[22]	ZHANG B C，TANG H M，FANG K，et al. Experimental study on deformation and failure characteristics of interbedded anti-inclined rock slopes induced by rainfall[J]. Rock Mechanics and Rock Engineering，2024，57：2 933-2 960.
[23]	ZHANG B C，NING Y B，TANG H M，et al. Study on the evolutionary process of interbedded anti-inclined slope block-flexure toppling in the upper Yalong River[J]. Bulletin Engineering Geology and Environment，2023，82：240.
[24]	何泽新. 晚新生代金沙江河谷地貌演化及动力机制[博士学位论文][D]. 北京：中国地质大学(北京)，2016.(HE Zexin. Late cenozoic landform evolution of Jinsha River valley and its driving mechanism[Ph. D. Thesis][D]. Beijing：China University of Geosciences (Beijing)，2016.(in Chinese))
[25]	李煜航，郝明，季灵运，等. 青藏高原东缘中南部主要活动断裂滑动速率及其地震矩亏损[J]. 地球物理学报，2014，57(4)：1 062-1 078.(LI Yuhang，HAO Ming JI Lingyun，et al. Falut slip rate and seismic moment deficit on major active faults in mid and south part of Eastern margin of Tibet plateau[J]. Chinese Journal of Geophysics，2014，57(4)：1 062-1 078.(in Chinese))
[26]	周慧颖，李树忱，段壮，等. 玄武岩相似材料配制及其物理力学参数研究[J]. 人民长江，2021，52(6)：130-135.(ZHOU Huiying，LI Shuchen，DUAN Zhuang，et al. Physical and mechanical parameters analysis and preparation of similar materials for basalt[J]. Yangtze River，2021，52(6)：130-135.(in Chinese))
[27]	詹志发，贺建先，郑博文，等. 边坡模型相似材料配比试验研究[J]. 地球物理学进展，2019，34(3)：1 236-1 243.(ZHAN Zhifa，HE Jianxian，ZHENG Bowen，et al. Experimental study on similar material proportion of slope model[J]. Progress in Geophysics，2019，34(3)：1 236-1 243.(in Chinese))
[28]	张发明，张万奎，王文远，等. 倾倒变形岩体发育强度与极限深度的确定方法[J]. 工程地质学报，2015，23(6)：1 109-1 116.(ZHANG Faming，ZHANG Wankui，WANG Wenyuan，et al. Distribution properties and limit depth determining methods of rock mass with toppling deformation[J]. Journal of Engineering Geology，2015，23(6)：1 109-1 116.(in Chinese))
[29]	黄达，马昊，石林．反倾层状岩质边坡倾倒变形机制与影响因素的离散元模拟[J]. 吉林大学学报：地球科学版，2021，51(6)：1 770-1 782.(HUANG Da，MA Hao，SHI Lin. Discrete element simulation of toppling mechanism and influencing factors of anti-dip layered rock slope[J]. Journal of Jilin University：Earth Science，2021，51(6)：1 770-1 782.(in Chinese))