悬臂式挡土墙抗滑稳定性分析  

Stability analysis of cantilever retaining wall

作　　者：施小平[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009

出　　处：《南水北调与水利科技》2015年第1期108-112,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(41306088)

摘　　要：基于强度折减有限元方法,对悬臂式挡土墙的抗滑稳定性进行了探讨。对比计算表明,悬臂式挡土墙的结构特征导致墙后填土内会出现第二滑裂面,其与坦墙的第二滑裂面有着本质的不同。悬臂式挡土墙的抗滑稳定性随着墙踵板、墙趾板宽度的增加而增加。当填土面倾斜时,土体主应力发生偏转,使挡土墙受到了更多土体的推挤作用,从而降低了挡土墙的稳定性。相同凸榫长度时,凸榫布置在越靠近墙踵板后下方的位置得到的安全系数最大,而布置在墙趾板前下方的安全系数较小。随着凸榫高度的增加,挡土结构物的安全系数也增大。实际工程中应尽量选择重度较小、黏聚力与内摩擦角较大的土体作为填料。The shear strength reduction finite element method was used to analyze the stability of cantilever retaining wall.Due to the structural characteristics of cantilever retaining wall,a second slide surface can be found in the filling behind the retaining wall,which is essentially different from the second slide surface of the planar retaining wall.The stability of cantilever retaining wall increases with the increasing width of heelplate and toe board.When the filing surface is inclined,the principal stress deflects and the retaining wall receives more compression from the soil body,which can decrease the stability of the retaining wall.With the same length of tenon,the stability of the retaining wall is the highest when the tenon is located at the below and back of heelplate,and the lowest when the tenon is located at the below and back of toe board.The stability of the retaining wall increases with the increasing height of tenon.In practice,it is suggested to fill the retaining wall using the soil with low weight,high cohesive strength,and high internal friction angle.

关 键 词：悬臂式挡土墙 稳定性 滑裂面 有限元 

分 类 号：TU452[建筑科学—岩土工程]