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| A mechanical model of progressive failure of linear complex landslides |
| DU Yi，YAN Echuan，CAI Jingsen，ZHOU You，WANG Jiyun |
| (Faculty of Engineering，China University of Geosciences(Wuhan)，Wuhan，Hubei 430074，China) |
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Abstract The difficulties of complex landslide control lie in the determination of stability and the identification of key control parts. Taking a linear complex landslide as an example，in this paper，the method for determining the stability state and the identification of key control parts of the landslide are studied from the perspective of progressive failure process. First of all，aiming at the generalized geological structure model of the landslide，a progressive failure mechanical model is established based on the strain-softening theory. Subsequently，a five-stage division model of the progressive failure process is proposed，and the stability state equations of the landslide are constructed for each stage based on the static balance principle. The mechanical model and stability state equations reflect the changing laws of equivalent load，stress distribution，deformation characteristics and stability during the evolution of this type of landslide，and reveal the progressive failure characteristics of the landslide，involving softening from both ends to the middle and losing stability from the local to the whole. Based on this，the stability state of the landslide can be effectively determined. A case study shows that the attenuation amplitude of the landslide stability increases with the development of progressive failure. If the lengths of the two destruction zones are different，the attenuation rate of the stability of the shorter zone is greater than that of the longer zone. In addition，when the sliding bands at both ends start to shear，the equivalent load of the longer zone is greater than that of the shorter zone，showing that the shorter zone is the key control part of this type of landslide. The research has certain theoretical significance and application value.
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[1] 周跃峰，龚壁卫，胡 波，等. 牵引式滑坡演化模式研究[J]. 岩土工程学报，2014，36(10)：1 855–1 862.(ZHOU Yuefeng，GONG Biwei，HU Bo，et al. Evolution mode of retrogressive landslide[J]. Chinese Journal of Geotechnical Engineering，2014，36(10)：1 855– 1 862.(in Chinese))
[2] 袁从华，童志怡，卢海峰. 牵引式滑坡特征及主被动加固比较分析[J]. 岩土力学，2008，29(10)：2 853–2 858.(YUAN Conghua，TONG Zhiyi，LU Haifeng. Analysis of characteristics of retrogressive landslide and comparison between active and passive reinforcements[J]. Rock and Soil Mechanics，2008，29(10)：2 853–2 858.(in Chinese))
[3] REGMI R，JUNG K，NAKAGAWA H，et al. Study on mechanism of retrogressive slope failure using artificial rainfall[J]. Catena，2014，122：27–41.
[4] 雍 睿，胡新丽，唐辉明，等. 推移式滑坡演化过程模型试验与数值模拟研究[J]. 岩土力学，2013，34(10)：3 018–3 027.(YONG Rui，HU Xinli，TANG Huiming，et al. Model testing and numerical simulation study of evolutionary process of thrust load caused landslide[J]. Rock and Soil Mechanics，2013，34(10)：3 018–3 027.(in Chinese))
[5] 卢应发，黄学斌，刘德富. 推移式滑坡渐进破坏机制及稳定性分析[J]. 岩石力学与工程学报，2016，35(2)：333–345.(LU Yingfa，HUANG Xuebin，LIU Defu. Mechanism and stability analyses of progressive failure of thrust-type landslides[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(2)：333–345.(in Chinese))
[6] 王 振. 基于位移分析的滑坡渐进破坏模型研究[硕士学位论文][D]. 重庆：重庆大学，2016.(WANG Zhen. Studies on the landslide progressive destruction model based on displacement analysis[M. S. Thesis][D]. Chongqing：Chongqing University，2016.(in Chinese))
[7] WANG J，XIAO L，ZHANG J，et al. Deformation characteristics and failure mechanisms of a rainfall-induced complex landslide in Wanzhou County，Three Gorges Reservoir，China[J]. Landslides，2019，17：419–431.
[8] 石豫川，冯文凯，刘汉超，等. 特大多期复合型滑坡稳定性评价及因素敏感性分析[J]. 岩土力学，2004，25(6)：975–980.(SHI Yuchuan，FENG Wenkai，LIU Hanchao，et al. Stability evaluation for giant and multiple landslide and sensitive analysis of factors[J]. Rock and Soil Mechanics，2004，25(6)：975–980.(in Chinese))
[9] 杨光华，钟志辉，张玉成，等. 根据应力场和位移场判断滑坡的破坏类型及最优加固位置确定[J]. 岩石力学与工程学，2012，31(9)：1 879–1 887.(YANG Guanghua，ZHONG Zhihui，ZHANG Yucheng，et al. Identification of landslide type and determination of optimal reinforcement site based on stress field and displacement field[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(9)：1 879–1 887.(in Chinese))
[10] 肖林萍. 复合型滑坡体系统的工程地质勘察及其稳定性分析[J]. 工程地质学报，2002：10(增)：320–325.(XIAO Linping. Engineering Geological Exploration and Stability Analysis of Complex Landslip System[C]// Journal of Engineering Geology，2002：10(Supp.)：320–325.(in Chinese))
[11] 谭福林，胡新丽，张玉明，等. 复合型滑坡推力计算方法研究[J]. 长江科学院院报，2016，33(6)：99–104.(TAN Fulin，HU Xinli，ZHANG Yuming，et al. A method of calculating the thrust of complex landslide[J]. Journal of Yangtze River Scientific Research Institute，2016，33(6)：99–104.(in Chinese))
[12] 向家松. 狮子坪水电站小丘地滑坡复活机制数值模拟分析与稳定性预测[硕士学位论文][D]. 北京：中国地质大学(北京)，2011. (XIANG Jiasong. Numerical simulation of the reactivation mechanism and stability prediction for Xiaoqiudi landslides in Shiziping Hydropower station[M. S. Thesis][D]. Beijing：China University of Geosciences (Beijing)，2011.(in Chinese))
[13] 赵玉光. 国道公路316线复合型滑坡系统变形特征与稳定性检算[C]// 第一届全国公路科技创新高层论坛论文集. [S. l. ]：[s. n.]，2002：189–194.(ZHAO Yugang. Deformational characteristics and stability check up and calculating of complex landslide system in national highway[C]// Proceedings of the first National Highway Science and Technology Innovation High-level Forum. [S. l. ]：[s. n.]，2002：189–194.(in Chinese))
[14] 刘爱华，王思敬. 平面坡体渐进破坏模型及其应用[J]. 工程地质学报，1994，2(1)：1–8.(LIU Aihua，WANG Sijing. Progressive failure model for slope with plane sliding surface and its application[J]. Journal of Engineering Geology，1994，2(1)：1–8.(in Chinese))
[15] 卢应发，邓国栋，杨丽平，等. 滑坡关键块力学行为及力传递特征和不同应力状态的稳定系数研究[J]. 岩石力学与工程学报，2014，33(5)：884–891.(LU Yingfa，DENG Guodong，YANG Liping，et al. Study of mechanical behaviors of key blocks and characteristics of force transmit and stability coefficient of different stress states of landslides[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(5)：884–891.(in Chinese))
[16] 邹宗兴，唐辉明，熊承仁，等. 大型顺层岩质滑坡渐进破坏地质力学模型与稳定性分析[J]. 岩石力学与工程学报，2012，31(11)：2 222–2 231.(ZOU Zongxing，TANG Huiming，XIONG Chengren，et al. Geomechanical model of progressive failure for large consequent bedding rockslide and its stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(11)：2 222–2 231.(in Chinese))
[17] 马俊伟. 渐进式滑坡多场信息演化特征与数据挖掘研究[博士学位论文][D]. 武汉：中国地质大学，2016.(MA Junwei. Evolution characteristics of multiple physics-based parameters and data mining technology for progressive landslides[Ph. D. Thesis][D]. Wuhan：China University of Geosciences，2016.(in Chinese))
[18] 陈 彬. 四川巴中田家坝滑坡形成机制及治理措施研究[硕士学位论文][D]. 成都：西南交通大学，2015.(CHEN Bin. Study on the formation mechanism and treatment measures of Tianjiaba Landslide in Bazhong city，Sichuan Province[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2015.(in Chinese))
[19] 袁小铭，王双峰. 长宁页岩气田区某丛式井场滑坡变形特征及形成机制浅析[J]. 地质灾害与环境保护，2019，30(2)：64–71.(YUAN Xiaoming，WANG Shuangfeng. Analysis on the deformation characteristics and formation mechanism of a cluster well field landslide in changning shale gas field area[J]. Journal of Geological Hazards and Environment Preservation，2019，30(2)：64–71.(in Chinese))
[20] 龙建辉，张吉宁. 煤矿井巷上方大型老滑坡复活机制与致灾过程[J]. 采矿与安全工程学报，2015，32(3)：511–517.(LONG Jianhui，ZHANG Ji¢ning. Revival mechanism and disaster-causing process of old-large landslide on coal mine tunnel[J]. Journal of Mining and Safety Engineering，2015，32(3)：511–517.(in Chinese))
[21] 王 博. 信阳新县泗店滑坡稳定性评价及治理效果分析[硕士学位论文][D]. 西安：长安大学，2018.(WANG Bo. Stability evaluation and treatment effect analysis of Sidian Landslide in Xin County，Xinyang City[M. S. Thesis][D]. Xi¢an：Chang¢an University，2018.(in Chinese))
[22] GILBER R B，LONG J H，MOSES B E. Analytical model of progressive slope failure in waste containment systems[J]. International Journal for Numerical and Analytical Methods in Geomechanics，1996，20(1)：35–56.
[23] SKEMPTON A W. Long-term stability of clay slopes[J]. Geotechnique，1964，14(2)：77–102.
[24] 秦四清，王思敬，孙 强，等. 非线性岩土力学基础[M]. 北京：地质出版社，2008：33–34.(QIN Siqing，WANG Sijing，SUN Qiang，et al. Nonlinear mechanics fundaments for rock and soil[M].Beijing：Geological Publishing House，2008：33–34.(in Chinese))
[25] QIN S Q，JIAO J J，WANG S J，et al. A nonlinear catastrophe model of instability of planar-slip slope and chaotic dynamical mechanisms of its evolutionary process[J]. International Journal of Solids and Structures，2001，38(11)：8 093–8 109.
[26] QIN S Q，JIAO J J，LI Z G Nonlinear evolutionary mechanisms of instability of plane-shear slope：catastrophe，bifurcation，chaos and physical prediction[J]. Rock Mechanics and Rock Engineering，2006，39(1)：59–76.
[27] QUINN P E，DIEDERICHS M S，ROWE R K，et al. Development of progressive failure in sensitive clay slopes[J]. Revue Canadienne De Géotechnique，2012，49(7)：782–795.
[28] 张龙飞，吴益平，苗发盛，等. 推移式缓倾浅层滑坡渐进破坏力学模型与稳定性分析[J]. 岩土力学，2019，40(12)：4 767–4 776. (ZHANG Longfei，WU Yiping，MIAO Fasheng，et al. Mechanical model and stability analysis of progressive failure for thrust-type gently inclined shallow landslide[J]. Rock and Soil Mechanics，2019，40(12)：4 767–4 776.(in Chinese))
[29] TERZAGHI Karl. Stability of slopes of natural clay[C]// Proceedings of the 1st International Conference of Soil Mechanics and Foundations. [S. l.]：[s. n. ]，1936：161–165.
[30] SKEMPTON A W. Long-term stability of slopes[J]. Geotechnique，1964，14(2)：75–102.
[31] 张 涛. 四川茂县羊毛坪巨型古滑坡复活机制研究[硕士学位论文][D]. 北京：中国地质科学院，2019.(ZHANG Tao. Research on the reactivation mechanism of a huge landslide in Yangmaoping，Maoxian County，Sichuan Province[M. S. Thesis][D]. Beijing：Chinese Academy of Geological Sciences，2019.(in Chinese)) |
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2021, Vol. 40 
