RPC组合球铰设计与制造安装控制研究

Study on Design and Manufacturing Installation Control of the RPC Combined Spherical Hinge

RPC组合球铰在各类转体施工工程中应用较广,国内外学者较多地研究了球铰受力和转体施工工艺,但其制造精度和安装精度目前尚未有统一认可的标准,也无相关的理论支撑。本文以呼和浩特市某市政快速路(70+70)m转体T构桥为工程背景,从RPC组合球铰构造、设计、计算、施工误差控制等多方面,研究了RPC混凝土组合球铰的应力计算方法和球面整体及局部误差对球铰应力的影响,结合球铰竖向转动角度的允许值和撑脚的工作状态,研究得出球铰半径误差小于8 cm、上下球铰安装间隙小于2 cm、滑道局部安装误差小于0.5 mm、滑道整体安装误差小于3 mm的控制标准,可为今后类似涉铁工程应用提供一定的参考。

RPC combined spherical hinge has been widely applied in the bridge turning construction in recent years.Many scholars at home and abroad have studied the force of spherical hinges and the construction process of the rotary body.However,its manufacturing accuracy and installation accuracy have not yet been uniformly recognized,and there is also no relevant theoretical support.Taking a(70+70)m swivel T-shaped bridge on a municipal expressway in Hohhot as the engineering background,this paper analyzes RPC combination spherical hinge structure,design,calculation,construction error control and other aspects,and studies the stress calculation method of RPC concrete composite spherical hinge and the influence of spherical surface whole and local errors on spherical hinge stress.Combined with the allowable value of the vertical rotation angle of the spherical hinge and the working state of the foot,the study shows that the spherical hinge radius error is less than 8 cm,the upper and lower spherical hinge installation clearance is less than 2 cm,the local installation error of the slide is less than 0.5 mm,and the overall installation error of the slide is less than 3 mm.These research results can provide some reference for similar iron-related engineering applications in the future.