港珠澳大桥防腐施工工作吊篮安全性分析

基于港珠澳大桥桥梁工程某标段防腐施工用工作吊篮结构外形、尺寸和安装方法,重点分析支架、吊篮、钢丝绳等主要受力构件,采用有限元软件MIDAS在对称和非对称两种施工工况进行静力计算与应力分析,确保施工的安全性。另外在不同风速、荷载和摆长情况下对工作吊篮的摆动幅度进行研究,从而给出对吊篮与墩身不发生危害碰撞的限制条件。为类似工程的设计及核算提供参考。

Safety analysis of work basket in Hong Kong-Zhuhai-Macao bridge anticorrosive construction

Based on the structure,shape,size and fixing method of the work basket in an anticorrosive construction site of Hong Kong-Zhuhai-Macao bridge,we analyze the support,basket and wire rope as the main force components,and calculate the static stresses in symmetric and asymmetric construction conditions by MIDAS FEM software,to ensure the safety of construction.By studying the swing amplitude of work basket in different wind speeds,loads and pendulum lengths,we get the restrictive condition that there is no harmful collide between the work basket and pier shaft,which provide useful reference for the design and check computation of similar construction.