复杂地形下大跨桁架多机接力整体吊装技术

以某选煤厂房栈桥桁架吊装为例,针对施工场地贯穿多条铁路干线、承载力不足等施工特点,制定桁架多机高空接力吊装方案,提出复杂地形下大跨桁架多机接力整体吊装技术,避免搭设施工平台,减少高空焊接作业,能够对复杂施工环境有很强的适用性.介绍了该技术的多机施工流程及换钩接力操作,对垂直吊装及水平运输两阶段进行有限元模拟,验证了更换吊点位置的合理性.方案经实施,有效解决了相应施工难点,为类似施工吊装提供参考.

Multi-machine Relay Integral Hoisting Technology of Long-span Truss under Complicated Terrain

Taking the hoisting of the trestle truss of a coal preparation plant as an example, in view of the construction features such as the construction site running through multiple main railway lines and insufficient bearing capacity, the truss multi-machine high-altitude relay hoisting plan was formulated, and the large-span truss multi-machine relay overall hoisting technology under complex terrain was proposed. Avoid building construction platforms and reduce high-altitude welding operations, which can have strong applicability to complex construction environments. The multi-machine construction process of this technology and the operation of the hook change relay are introduced. The finite element simulation of the two stages of vertical hoisting and horizontal transportation verifies the rationality of the position of the hoisting point. The implementation of the plan effectively solved the corresponding construction difficulties and provided a reference for similar construction hoisting.