摘要
为提高挂篮调坡效率和安全性,减小宽幅桥梁后托梁在行走过程中变形过大的问题,以西郊大桥为工程背景,对挂篮主桁结构和后托梁进行优化设计,提出一种自锁式液压顶升装置和在箱梁底模下增加行走导梁及连接翼缘模板下导梁与后托梁等措施,在此基础上,利用Midas/Civil建立优化后的挂篮模型,从挂篮主桁、前上横梁、底托梁和挂篮行走4个方面对挂篮进行有限元分析,得出其在最不利浇筑工况和行走工况下的最大应力和变形,并对自锁式液压顶升装置可调高度菱形架结构连接节点进行检算。结果表明,改进后挂篮调坡快速且安全性较高,强度、刚度和连接节点均能满足施工要求,所提挂篮改进方案可为类似工程提供参考。
In order to improve the efficiency and safety of the hanging basket slope adjustment,and reduce the problem of excessive deformation of the rear joist of the wide bridge during the traveling process,with the Xijiao Bridge as the engineering background,the main truss structure and the rear joist of the hanging basket were optimized.A self-locking hydraulic jacking device and measures such as adding a walking guide beam under the bottom form of the box beam and connecting the lower guide beam and the rear joist of the flange formwork were proposed.On this basis,using Midas/Civil to establish the optimized model of the hanging basket,the finite element analysis of the hanging basket from four aspects:the main truss,the front upper beam,the bottom joist,and the walking The maximum stress and deformation under running conditions,and the self-locking hydraulic jacking device’s adjustable height diamond frame structure connection nodes are checked.The results show that the improved hanging basket has fast slope adjustment and higher safety,strength and rigidity.Both the connecting nodes and the connecting nodes can meet the construction requirements,and the improvement plan of the hanging basket proposed can provide a reference for similar projects.
作者
刘伟
宋新新
吴雨航
王斌
吕盟
Liu Wei;Song Xinxin;Wu Yuhang;Wang Bin;Lv Meng(China Construction Railway Investment Road and Bridge Co.Ltd.,Wuhan 460014,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《石家庄铁道大学学报（自然科学版）》
2021年第4期15-20,65,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
中建铁路投资建设集团有限公司专项研究计划。
关键词
桥梁工程
悬臂浇筑
挂篮
优化设计
bridge engineering
cantilever pouring
hanging basket
optimum design
