有限元网格和边界条件对土坡稳定性计算的影响  

Influence of Mesh Density and Boundary Condition of Finite Element Model on Calculating Soil Slope Stability

作　　者：陈锦璐[1,2] 王俊杰[1,2] 唐胜传[3] 

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074 [3]重庆交通科研设计院,重庆400067

出　　处：《水电能源科学》2011年第11期135-137,216,共4页Water Resources and Power

基　　金：重庆市自然科学基金资助重点项目(CSTC;2009BA6001);中国博士后科学基金特别资助项目(200902284);交通运输部西部交通建设科技基金资助项目(2009318740099)

摘　　要：针对强度折减法的计算结果可能影响工程设计人员对土坡稳定程度的合理判定的问题,以某均质土坡为例,基于PLAXIS数值分析软件,分析了有限元网格疏密程度和边界条件对强度折减法计算结果的影响,通过与简化Bishop法计算结果的对比,建议了合理的网格疏密度和边界范围取值,并基于不同取值的岩土物理力学参数,验证了强度折减法计算结果的合理性。The calculation results obtained by the technology of reducing soil strength may affect engineering designer on judging the rationality of soil slope stability. Based on numerical analysis software PLAXIS, the influence of the mesh density and boundary condition of finite element model on the calculating results with technology of reducing soil strength is analyzed. Comparison with the calculating results of simplified Bishop＇s method, the reasonable mesh density and model range of the finite element model are suggested. The reasonability of the suggestion is also discussed by analyzing the different geotechnical physical mechanics parameter values.

关 键 词：土坡稳定性 强度折减法 PLAXIS 网格疏密度 边界条件 

分 类 号：TU457[建筑科学—岩土工程]