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| STUDY OF MECHANICAL BEHAVIORS OF KEY BLOCKS AND CHARACTERISTICS OF FORCE TRANSMIT AND STABILITY COEFFICIENT OF DIFFERENT STRESS STATES OF LANDSLIDES |
| LU Yingfa1，2，DENG Guodong3，YANG Liping4，LIU Defu1 |
(1. School of Civil Engineering，Hubei University of Technology，Wuhan，Hubei 430068，China；2. Key Laboratory of Geological Hazards in Three Gorges Reservoir Area，Ministry of Education，China Three Gorges University，Yichang，Hubei 443002，China；3. School of Civil Engineering，Central South University，Changsha，Hunan 410075，China；
4. College of Huaxia，Wuhan University of Technology，Wuhan，Hubei 430223，China) |
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Abstract The mechanical behaviors of key blocks and characteristics of force transfer of landslides were analyzed. The interactions among forces of sliding，friction and thrust were investigated assuming the anti-sliding forces were not reduced. The slice is at the critical stress state if the sliding force is equal to the friction. Representative characteristics of thrust between the analyzed slices were studied. The difference of the thrust between slices defines the different stress states. If the stresses of slices are between the residual stress state and the peak stress state，the trust change decrease or increase gradually(the measured values of the thrusts can be negative or positive). If the stresses of slices have not reached the peak state，the thrust increases gradually(the measured values of the thrusts can only be positive). A relationship between the coefficients of stability considering the different stress states was derived. The coefficient of stability calculated with the conventional stability analyses in terms of the critical stress state of landslides was not the smallest one, while that calculated in terms of the residual stress state turned out to be the smallest one，considering three different stress state(the critical stress state，the failure stress state，the residual stress state and the mixed stress state).
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Received: 13 May 2013
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| [1] 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(3)：433–454.(in Chinese))
[2] SCHUSTER R L. The 25 most catastrophic landslides of the 20th century，in Chacon[C]// Proceedings of the 8th International Conference and Field Trip on Landslides. Rotterdam：A. A. Balkema，1996：1–18.
[3] 郑孝玉. 滑坡预报研究方法综述[J]. 世界地质，2000，19(4)：370–374.(ZHENG Xiaoyu. Summary on the methods of prediction to landslide[J]. World Geology，2000，19(4)：370–374.(in Chinese))
[4] FINLAY P J，FELL R，MAGUIRE P K. The relationship between the probability of landslide occurrence and rainfall[J]. Candian Geotechnical Journal，1997，34(6)：811–824.
[5] 殷坤龙. 降雨对滑坡的作用机理及动态模拟研究[J]. 地质科技情报，2002，21(1)：75–78.(YIN Kunlong. Mechanism and dynamic simulation of landslide by precipitation[J]. Geological Science and Technology Information，2002，21(1)：75–78.(in Chinese))
[6] 郑 宏，冯 强，罗先启，等. 石榴树包滑坡机制的有限元分析[J]. 岩石力学与工程学报，2004，23(10)：1 648–1 653.(ZHENG Hong，FENG Qiang，LUO Xianqi，et al，Finite element analysis on landslide mechanism at Shiliushubao[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(10)：1 648–1 653.(in Chinese))
[7] 刘广润. 论滑坡分类[J]. 工程地质学报，2002，10(4)：339–340.(LIU Guangrun. Discussion on classification of landslides[J]. Journal of Engineering Geology，2002，10(4)：339–340.(in Chinese))
[8] 姚海林. 考虑裂隙及雨水入渗影响的膨胀土边坡稳定性分析[J]. 岩土工程学报，2001，23(5)：606–609.(YAO Hailin. Analysis for the slope stability of expansive soils considering cracks and infiltration of rain[J]. Chinese Journal of Geotechnical Engineering，2001，23(5)： 606–609.(in Chinese))
[9] 卢应发，周盛沛，罗先启，等. 渗流对抗滑桩加固滑坡后的影响效果评价[J]. 岩石力学与工程学报，2007，26(9)：1 840–1 846.(LU Yingfa，ZHOU Shengpei，LUO Xianqi，et al. Evaluation of effects of seepage on landslide reinforced by anti-sliding piles[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(9)：1 840– 1 846.(in Chinese))
[10] 卢坤林，朱大勇，许 强，等. 滑带土抗剪强度参数的三维反分析[J]. 岩土力学，2010，31(10)：3 319–3 328.(LU Kunlin，ZHU Dayong，XU Qiang，et al. 3D back analysis of shear strength parameters of slip soil[J]. Rock and Soil Mechanics，2010，31(10)：3 319–3 328.(in Chinese))
[11] 杨诗义，雷学文. 弱化改进后的灰色预测模型研究[J]. 山西建筑，2010，36(3)：1–3.(YANG Shiyi，LEI Xuewen. Research on the gray forecasting model after weakening improvement[J]. Shanxi Architecture，2010，36(3)：1–3.(in Chinese))
[12] 张 珍，李世海，马 力. 重庆地区滑坡与降雨关系的概率分析[J]. 岩石力学与工程学报，2005，24(17)：3 185–3 191.(ZHANG Zhen，LI Shihai，MA Li. Probability analysis of relationship between landslide and rainfall in Chongqing area[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 185–3 191.(in Chinese))
[13] 王建锋. 两类经典滑坡发生时间预报模型的理论分析[J]. 地质力学学报，2004，10(1)：40–50.(WANG Jianfeng. Theoretical analysis to two classic landslide prediction models：Saito?s model and Voight?s model[J]. Journal of Geomechanics，2004，10(1)：40–50.(in Chinese))
[14] 黄秋润. 论滑坡预报[J]. 国土资源科技管理，2004，(6)：15–20.(HUANG Runqiu. On time predication of landslide[J]. Management Geological Science and Technology，2004，(6)：15–20.(in Chinese)).
[15] ALONSO E E，GENS A. Influence of rainfall on the deformation and stability of a slope in overconsolidated clays：a case study[J]. Hydrogeology Journal，2003，(11)：175–192.
[16] 卢应发，吴延春，杨丽平，等. 非饱和土热力学参数确定的探讨[J].岩土力学，2008，29(7)：1 747–1 752.(LU Yingfa，WU Yanchun，YANG Liping，et al. Investigation on determination of thermo dynamical parameters of unsaturated soil[J]. Rock and Soil Mechanics，2008，29(7)：1 747–1 752.(in Chinese))
[17] LU Y F，LUO X Q，WU Y C，et al. Study of fundamental properties of soil-water characteristic curve[C]// Proceedings of the 3rd Asian Conference on Unsaturated Soils. Beijing：Science Press，2007：243–249.
[18] 卢应发，吴延春，罗先启，等. 土水特征曲线及其相关性研究[J]. 岩土力学，2008，29(9)：2 481–2 486.(LU Yingfa，WU Yanchun，LUO Xianqi，et al. Study of soil-water characteristical curve and its influential factors[J]. Rock and Soil Mechanics，2008，29(9)：2 481– 2 486.(in Chinese))
[19] 卢应发，路 韬，周建军，等. 一种新的节理模型及其在基桩分析中的应用[J]. 岩土力学，2013，34(4)：967–973.(LU Yingfa，LU Tao，ZHOU Jianjun，et al. A new joint constitutive model and its application to pile foundation analyses[J]. Rock and Soil Mechanics，2013，34(4)：967–973.(in Chinese))
[20] 卢应发，杨丽平，刘德富. 一种新的节理本构模型及几种新的滑坡稳定系数计算方法[J]. 岩石力学与工程学报，2013，32(12)：2 431– 2 438.(LU Yingfa，YANG Liping，LIU Defu. A new joint constitutive model and a few new methods of stability coefficient calculation of landslides[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2431–2438.(in Chinese)) |
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2014, Vol. 33 
