斜坡积土双排抗滑桩受力特性及优化设计研究.pdfVIP

学兔兔 第40卷，第3期 公 路 工 程 Vo1．40，No．3 2 0 1 5年 6月 Highway Engineering Jun．，2 0 1 5 斜坡积土双排抗滑桩受力特性及优化设计研究 梅 敏 (湖南省交通科学研究院，湖南 长沙 410015) [摘 要】采用有限元ABAQUS软件对双排抗滑桩进行数值仿真计算，以研究斜坡积土滑坡双排抗滑桩的受 力特性，并针对不同滑坡推力、不同桩排距前后桩的受力情况进行重点研究，用以为双排抗滑桩的优化设计提供理 论支撑。研究表明随着滑坡推力的增大，前后排桩的最大弯矩及最大剪力均呈近似线性增大，且后排桩的增长速 率更大，所承担的推力分配也更大。桩排距的增大在后排桩的弯矩及前排桩的剪力更为敏感，且桩排距增大到一 定程度土拱效应消失，双排桩即弱化为单排桩。该研究结论应用于湖南龙永高速公路某滑坡，取得了良好的应用 效果。 [关键词】滑坡推力；双排抗滑桩；受力特性；土拱效应；推力分配；优化设计 [中图分类号】U 443．15 [文献标识码】A [文章编号】1674—0610(2015)03—0181—04 Mechanical Characteristics onOblique Soil Slop Double-row Stabilizing Piles andOptimization Design MEI Min (Hunan Communications Research Institute，Changsha，Hunan 410015，China) [Abstract]The finite element ABAQUS software was used to numerical simulation on double—row anti—slide piles，for studied the pitch fill landslide double-row pile the stress characteristic，and aims at around the different landslide thrust force，a different pile row of distance the pile stress situation con— ducts the key research，with thought the two-row anti—slippery pile optimized design provides the theory support．The research indicated along with landslide thrust force enlargement，around the piling biggest bending moment and the biggest shearing force assumes the approximate linearity to increase，also the lat- ter piling growth speed is bigger，undertakes the thrust force assignment is also bigger．Pile row of dis— tance enlargement is more sensitive in after piling bending moment and the first piling shearing force，also