现浇悬臂桥梁无轨装配式三角挂篮设计与试验分析

Design and Experimental Analysis of Trackless Assembled Triangular Form Traveler for Cast-in-place Cantilever Bridges

摘要:

为解决传统挂篮行走轨道笨重，装配化程度低，通用性不强等痛点问题，以全装配式节点、无轨道行走和低重量比为控制目标，通过数值模拟、试验验证等手段，设计了一套无轨装配式三角挂篮，对挂篮在梁段混凝土浇筑和行走时进行了仿真分析，对关键构件进行了安全性验算，并通过静载试验验证。结果表明：挂篮取消行走轨道后，挂篮整体重量比仅为0.27，行走系统重量比仅为2.26%；实现无轨步履式行走方式，单次行走距离达50cm；挂篮杆件之间全销接，施工方便；静载实测数据校验系数均在0.9左右，与理论值高度吻合；挂篮整体和局部受力变形均满足规范规定。

Abstract:

In order to solve the pain points of traditional form traveler, such as the heavy walking tracks, low assembly degree and weak universality, with the control objectives of fully assembled joints, trackless walking and low weight ratio, a set of trackless assembled triangular form traveler is designed through the means such as numerical simulation and experimental verification. The simulation analysis is carried out for the form traveler during the casting of the concrete of the beam segment and its walking. The safety checks are conducted on the key components, and the verification is carried out through static load tests. The results show that after the walking track of the form traveler is removed, the whole weight ratio of the form traveler is only 0.27, and the weight ratio of the walking system is only 2.26%. The trackless walking mode is realized, and a single walking distance is up to 50cm. All the members of the form traveler are connected by pins, which is convenient for construction. The calibration coefficients of the measured static load data are all around 0.9, which highly coincide with the theoretical values. The force and deformation of the whole and local parts of the form traveler meet the requirements specified in the codes.