齿坎式挡土结构抗滑稳定性分析  

Numerical analysis for stability against sliding of retaining wall with notched sill

作　　者：俞亚南[1] 高庆丰[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2003年第6期652-656,共5页Journal of Zhejiang University：Engineering Science

摘　　要：采用D-P弹塑性薄层单元模型数值模拟方法,结合现场试验结果对齿坎式挡土结构抗滑稳定性进行了计算分析,数值计算结果表明,挡墙的基底滑动过程、抗滑力和齿前土压力等力学特性指标与实测结果相吻合.进而分析了齿坎长度、位置、基底土特性等因素对齿坎式挡墙抗滑稳定性的影响程度;分析表明,齿坎式挡土结构物滑移破坏形态与刚体极限平衡法的假定存在差异,现行的抗滑稳定性与抗倾覆稳定性分别验算的方法是偏于不安全.The lamina FEM for Doucker-Prager elasto-plastic model was used for analysis of the stability against bed-sliding for retaining wall by numerical simulation; the results of which accorded well with test results. Consequently, the stability of the retaining wall was discussed for the sliding factors of soil characteristics, load action position, notched-sill in length and position, etc. The calculation result show that the stability of retaining wall increased with the length of notched sill; and that the suitable length was 0.7～1.0 m. The bed failure surface of the retaining wall with notched sill is different from the usually designed sliding surface; the stability against sliding decreased with overturning moment. So analysis for retaining wall against sliding should not neglect the effect of coupling against overturning.

关 键 词：齿坎式 挡土结构 抗滑稳定性 数值模拟 

分 类 号：TU476.3[建筑科学—结构工程]