单侧加载不同组合形式桩结构受力变形分析  

Analysis of Mechanical Deformation of Pile Structures in Different Combination Forms under Unilateral Load

作　　者：张浩瀚 张杨龙 Zhang Haohan;Zhang Yanglong(不详)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]中国建筑第五工程局有限公司,湖南长沙450000

出　　处：《重庆建筑》2021年第2期36-39,共4页Chongqing Architecture

摘　　要：倾斜桩受荷载作用时在控制变形方面具有独特优势,目前缺乏对被动倾斜桩在路堤加固中的研究,以及不同组合形式桩结构在控制路堤变形方面的效果验证。基于此,该文提出三种不同组合形式桩结构体系,采用有限元建模的方法,与室内模型成果对比、调校,建立单侧加载的三种组合桩结构的数值分析模型,通过研究三种组合结构在单侧加载过程中桩身水平位移、弯矩、剪力的变化规律,对比三种组合结构在单侧荷载作用下的受力变形特性。结果表明:在各级相同荷载作用下,斜直桩组合结构控制水平位移效果最好;斜直桩具有更好的抗弯承载力;相比传统直桩结构,外侧设置为斜桩的组合结构具有更好的抗剪能力。Inclined piles have unique advantages in controlling deformation when subjected to loads.At present,there is a lack of research on passive inclined piles in embankment reinforcement and verification of the effectiveness of different pile combinations in controlling embankment deformation.Therefore,three composite pile structures were proposed to simulate traffic loads by setting unilateral loads.Using the finite element modeling method and through comparing with the results of the indoor model and adjusting,a numerical analysis model was established for the three composite pile structures with unilateral loading.By studying the change laws of horizontal displacement,bending moment,and shear force of the three pile structures during the unilateral loading process,the force and deformation characteristics of the three composite structures under unilateral load were compared.The result showed that under the same load at all levels the"diagonal+straight"pile combination structure has the best effect in controlling horizontal displacement;such a pile has better flexural bearing capacity;compared with the traditional straight pile structure,the pile combination structure with the diagonal pile on the outside has better shear resistance.

关 键 词：道路工程 路堤加固 组合桩结构 数值分析 变形 弯矩 剪力 

分 类 号：U416.1[交通运输工程—道路与铁道工程]