层状岩质边坡失稳的尖点突变模型
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摘要
根据含软弱夹层层状岩质边坡失稳的特点,建立了边坡地质力学模型,考虑内外环境因素对边坡稳定性的影响,建立了完善的边坡失稳尖点突变模型,分析得到了边坡系统发生突变的必要条件。边坡在与外界进行物质和能量的交换过程中,其内外环境的变化导致突变模型中控制变量改变,边坡可能不会滑坡,也可能发生快速和慢速蠕滑,从而形成复杂的演化特征。研究结果加深了对滑坡成因的认识,揭示了应用突变理论研究边坡失稳现象是可行性。
A slope geomechanical model was proposed based on the destabilization characteristics of soft sandwich-rock slopes.Based on an analysis of the effects of internal-external factors on slope stability,the cusp catastrophe model of slopes can be employed to analyze and predict the necessary conditions leading to slope catastrophes.During the processing of the mass and energy exchange with the external,this may lead to the change of controlling variables.Slides or quick or slow creeping thus may take place due to environmental complexity.This work helps deepen understanding of the formation of landslides and makes feasible the applcation of the catastrophe model to slope destabilization investigations.
A slope geomechanical model was proposed based on the destabilization characteristics of soft sandwich-rock slopes.Based on an analysis of the effects of internal-external factors on slope stability,the cusp catastrophe model of slopes can be employed to analyze and predict the necessary conditions leading to slope catastrophes.During the processing of the mass and energy exchange with the external,this may lead to the change of controlling variables.Slides or quick or slow creeping thus may take place due to environmental complexity.This work helps deepen understanding of the formation of landslides and makes feasible the applcation of the catastrophe model to slope destabilization investigations.
引文
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[2]许江,鲜学福,唐建新,等.论三峡库区地质灾害的非线性科学理论与控制[J].重庆大学学报,2002,25(5):119-123.XU JIANG,XIAN XUE-FU,TANG JIAN-XIN,etal.Nonlinear science and control about the geologicalhazards in the three gorges reservoir area[J].Journalof Chongqing University,2002,25(5):119-123.
[3]LI X.Finite element analysis of slope stability using anonlinear failure criterion[J].Computers andGeotechnics,2007,34(3):127-136.
[4]黄润秋,许强.非线性理论在工程地质中的应用[J].中国科学基金,1996(2):79-84.HUANG RUN-QIU,XU QIANG.The application ofnonlinear theory in engineering geology[J].Bulletin ofNational Science Foundation of China,1996(2):79-84.
[5]雷谦荣.边坡中地下水压力问题的探讨[J].工程勘察,1997(1):29-32.LEI QIAN-RONG.The probe into underground waterpressure in slope[J].Geotichnical Investigation andSurveying,1997(1):29-32.
[6]何满潮,姚爱军,鹿粗,等.边坡岩体水力学作用的研究,岩石力学与工程学报,1998,17(6):662-666.HE MAN-CHAO,YAO AI-JUN,LU CU,et al.Study of mechanical functions of underground water inslope rockmass[J].Chinese Journal of Rock Mechanicsand Engineering,1998,17(6):662-666.
[7]QIN S Q,JIAO J J,WANG S J.A nonliear dynamicalmoder of landslide evolution[J].Geomorphology,2002,43(1):77-85.
[8]QIN S Q,JIAO J J,WANG S J.A nonlinearcatastrophe model of planar-slope slope and chaoticdynamics mechanism of its evolutionary process[J].International Journal of Solids and Structures,2001,38(44):8093-8109.
[9]秦四清.斜坡失稳过程的非线性演化机制与物理预报[J].岩土工程学报,2005,27(11):1241-1248.QIN SI-QING.Nonlinear evolutionary mechanisms andphysical prediction of instability of planar-slip slope[J].Chinese Jounal of Geotechnical Engineering,2005,27(11):1241-1248.
[10]殷有泉,杜静.地震过程中的燕尾突变模型[J].地震学报,1994,16(4):416-421.YIN YOU-QUAN,DU JING.The model of govetailmutation during the occurring of earthquake[J].ActaSeismologica Sinica,1994,16(4):416-421.
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