摘要
挡土墙是常见的边坡支挡结构,目前同时具备高预制化程度和可绿化功能的挡土墙较少。基于柱板式挡墙,得到一种用于路堤、路肩的装配式可绿化挡墙,其由在工厂预制的上下空心立柱、预制的倾斜搁板(格栅)以及现浇底板组成,各部分由锚钉连接。施工时将各部件运输至现场进行拼装,其上部倾斜搁板填土以植绿达到可绿化目的。为探究其具体设计参数以及受力特点,基于ABAQUS有限元分析软件,以相关规范为指导,将静载条件下立柱关键节点处应力作为评价指标,以正交试验法确定了该类挡墙最优设计参数,并根据最优参数设计的挡墙,得到了此类挡墙主体结构的受力特点。根据受力特点总结了其位移模式,并根据结构特点,总结了此类挡墙的应用关键技术。结果表明:上部柱高的大小对挡墙受力影响最大,下柱倒角大小对其影响最小,并确定了最佳组合的具体尺寸;上部柱体随高度增加,位移呈线性增长,应力呈抛物线形减小,下部柱体应力受倒角尺寸影响较大,在进入倒角处应力达到最大值,立柱侧移受倒角影响较大,在倒角范围应力变化最小;由于挡墙由上下部分组成,故其位移模式为组合形式。
Retaining wall is a common slope retaining structure. There are few greenable retaining walls with high prefabrication degree at present. Based on the column plate retaining wall, a prefabricated greenable retaining wall for embankment and road shoulder is obtained, which is composed of prefabricated upper and lower hollow columns, prefabricated inclined shelf(grid) and cast-in-place bottom plate in factory, each part of which is connected by anchors. During construction, all parts shall be transported to the site for assembly, the upper inclined shelf is filled with soil for greening. In order to explore the specific design parameters and stress characteristics, based on ABAQUS finite element analysis software, under the guidance of relevant specifications, taking the stress at the key nodes of the column under static load as the evaluation indicator, the optimal design parameters of this kind of retaining wall are determined by using the orthogonal test method. According to the retaining wall designed with the optimal parameters, the stress characteristics of the main structure of this kind of retaining wall are obtained. The displacement mode is summarized according to the stress characteristics, and the key technology of this kind of retaining wall is summarized according to the structural characteristics. The result shows that(1) The height of the upper column has the greatest influence on the retaining wall, while the chamfer of the lower column has the least influence on it, and the specific dimensions of the best combination are determined accordingly.(2) The displacement of the upper column increases linearly and the stress decreases parabola with the increase of height. The stress of the lower column is greatly affected by the chamfer size, and the stress reaches the maximum at the entrance of the chamfer. The lateral displacement of the column is greatly affected by the chamfer, while the stress change is the smallest in the chamfer range.(3) As the retaining wall is composed of upper and lower parts, its displacement mode is composite.
作者
宁英杰
王新泉
王正军
朱聪
涂杰文
NING Ying-jie;WANG Xin-quan;WANG Zheng-jun;ZHU Cong;TU Jie-wen(Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou Zhejiang 310051,China;School of City,Zhejiang University,Hangzhou Zhejiang 310015,China;Zhejiang Jiaogong Hongtu Transport Construction Co.,Ltd.,Hangzhou Zhejiang 310051,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2023年第1期59-66,共8页
Journal of Highway and Transportation Research and Development
基金
浙江省交通运输厅科技计划项目(2019007)。
关键词
道路工程
正交设计
数值模拟
装配式挡墙
可绿化挡墙
road engineering
orthogonal design
numerical simulation
prefabricated retaining wall
