大跨度上下双室连续刚构渡槽的挂篮施工力学行为分析

Analysis on the Mechanical Behavior of the Hanging Basket Construction of the Large-Span Upper and Lower Double-Chamber Continuous Rigid Frame Aqueduct

在黔中水利枢纽工程中,徐家湾渡槽存在中梁段质量大且为上下叠箱的问题。由于菱形挂篮具有外形美观、结构简单、刚度大、自重轻、施工变形小、作业面开阔和移动方便等优点,因此悬臂浇筑段采用菱形挂篮施工工法,并对其挂篮结构、走形模式进行优化设计,分析验算了挂篮行走工况和最不利荷载工况下的变形和稳定性。研究结果表明,这种工法满足施工要求,为相似工程提供了解决方法。

In the Qianzhong Water Conservancy Project,the Xujiawan Aqueduct has the problem that the middle beam section is large in mass and is stacked up and down.Because the diamond-shaped hanging basket has the ad⁃vantages of beautiful appearance,simple structure,large rigidity,light weight,small construction deformation,open working surface and convenient movement,the cantilever pouring section adopts the diamond-shaped hanging basket construction method,the structure and walking mode of the cradle are optimized,and the deformation and stability of the cradle under the traveling conditions and the most unfavorable load conditions are analyzed and checked.The re⁃search results show that this construction method meets the construction requirements and provides a solution for sim⁃ilar projects.