摘要
本工程根据详实的工程勘察及现行设计规范,进行工程设计,施工完成后,发生滑塌,因此工程进行第二次工程设计。本文在国内首次使用有限元软件Z_soil.pc v2012,采用M-C强度屈服准则,有限元强度折减法,进行Multi-Laminate本构模型数值模拟,通过前后两次削坡对比,对影响复合型岩质高边坡稳定性的因素进行分析,从而明确了工程发生滑塌的具体原因,进而得出结论:复合型岩质高边坡存在的不同岩层对边坡的稳定性具有较大影响,并且边坡开挖过程对同一层岩体剪应力的影响范围为0~12米。
Based on the roadbed landslide of a practical project,utilizing the Finite Element Analysis Software Z_soil.pc v2012 and Mohr-Coulomb strength yield criterion,this study builds the Multi-Laminate constitutive numerical models and makes various simulations.By contrasting before and after the slope cutting,this paper analyzes the factors that would affect the stability of the composite rock high slope.The result demonstrates that different rock layers of the composite rock high slope have a significant influence on the stability of the slope.The influence of shear stress in the same rock layer ranges from 0 to 12 m during the excavation.
引文
[1]曹平,张科,汪亦显,林杭.多层边坡破坏机制数值模拟研究.[J].岩土力学,2011(3),872~878.Ping Cao,Ke Zhang,Yixian Wang,Hang Lin.Study of numerical simulation of multilayer slope failure mechanism.[J],Geomechanics,2013(3),827~878.
[2]吕庆,孙红月,尚岳全,强度折减有限元法中边坡失稳判据的研究.[J].浙江大学学报,2008,42(1):83~87.Qing lv,Hongyue Sun,Yuequan Shang.Study of slope instability criterion using strength reduction finite element method.[J].Journal of Zhejiang University,2008,42(1):83~87.
[3]赵尚毅,郑颖人,张玉芳.有限元强度折减法中边坡失稳的判据探讨.[J].岩土力学,2005,26(2):332~336.Shangyi Zhao,Yingren Zheng,Yufang,Zhang.Investigation of slope instability in finite element strength reduction method.[J].Geomechanics,2005,26(2):332~336.
[4]赵尚毅,郑颖人用有限元强度折减法进行节理岩质边坡稳定性分析.[J].岩石力学与工程学报,2003,2(22).254~260.Shangyi Zhao,Yingren Zheng.Analysis of joint rock slope stability with finite element strength reduction.[J].Journal of Rock Mechanics and Engineering,2003,2(22).254~260.
[5]廖小平类土质路堑边坡变形破坏类型及其稳定性分析.[J]岩石力学与工程学报,2003(10)2765~2772Xiaoping Liao.Analysis of deformation and failure type and stability of similar soil cut slope.[J],Journal of Rock Mechanics and Engineering,2003(10)2765~2772.
[6]S.Commend,F.Geiser,L.Tacher,3D numerical modelling of a landslide in Switzerland,2005.
[7]B.Francois,Ch.Bonnard,L.Laloui,V.Triguero.Numerical modelling of the hydro-mechanical behaviour of a large slope movement:the Trieseriberg landslide,2005.