铁路变高度连续钢桁梁桥检修车结构设计

Design of Structure of Maintenance Vehicle for Railway Continuous Steel Truss Bridge with Variable Height

研究目的:桥梁养护和维修是保障桥梁寿命和行车安全的一项非常重要的工作,南昌枢纽东新赣江特大桥为变高度连续钢桁梁桥,也是目前我国跨度最大的铁路四线钢桁梁桥,本文旨在研究能安全爬坡、过跨,同时满足该桥起升高度大、横向跨度大、防电性能要求高等需求的检修设备结构设计方案。研究结论:本文研究的检修车结构方案:(1)通过电控插拔销装置,可实现检修小车步履式走行,无需作业人员到弦杆上操作,同时小车与轨道之间安装了反滚轮装置,提高了施工作业和走行的安全性;(2)通过将走行轮箱制作成拱形,实现了检修小车的过跨行走,一台检修车即可完成全桥检修工作,可有效降低成本;(3)侧面悬挂工作台采取轻质可伸缩的桁架式吊笼,并在桁架上采用限位保护装置,可实现上弦侧面及腹杆的全面、安全检修;(4)本文介绍的技术方案可供变高度、横向跨度大的同类型钢结构桥梁检修设备设计提供参考。

Research purposes： The bridge maintenance and repair is an essential to guaranteeing the service life of the bridge and the traffic safety. The Dongxin Gan River Bridge in Nanchang is a continuous steel truss bridge and it is the largest span four - track railway steel truss bridge in China. This paper studies the scheme for design of the bridge maintenance device featured with safe climbing and crossing span and meeting the bridge requirements for highly lifting, large horizonal span and good anti- electric performance. Research conclusions： The scheme of the maintenance vehicle presented in this pape is as follows： （1） The maintenance vehicle can travel in walk type by control of the electric plug pin device, with no operation by person on the chord member. The anti rolling device is installed between the the vehicle and the rail to enhance the construction safety and the travel safety. （2） The maintenance vehicle can cross the span because the walking wheel box is made in arch shape. In this way, the whole maintenance works can be done by one maintenance vehicle and the maintenance cost can be reduced. （3） The full and safe maintenance can be conducted to the side of the upper arch and web member because the light extension - type suspension cage is used as the side operating platform and the limit protection device is used for the truss. （4） The technical scheme presented in this paper can provide the reference to the similar works.