钢管混凝土先拱后梁法系杆拱桥施工监控技术

Construction Monitoring Technology for Steel Tube Concrete Arch Bridge with Arch First and Then Beam Method

以某高速公路连接线1-88米钢管混凝土系杆拱桥为工程依托,通过系统化监控技术手段,实现对桥梁建设过程中的系梁变形、拱肋应力、吊杆张拉力等构件的监测;通过建立Midas/Civil三维模型,对本桥进行全过程有限元模拟,然后将现场实测数据与理论模型计算值进行分析比较。对比发现,在合理的施工顺序及施工监控指导下,实测构件内力与位移与理论计算基本相符,成桥的吊杆力实测值与理论值误差在10%以内,接近设计要求。实现了设计成桥线形与索力。

Based on the 1-88-meter concrete filled steel tube pole arch bridge of a highway connecting line,realize the monitoring of beam deformation,arch rib stress and boom tension in the bridge in the whole process,and compare the measured data with the calculated value of the theoretical model.Through comparison,it was found that under the reasonable construction sequence and construction monitoring guidance,the measured internal forces and displacements of the components were basically consistent with the theoretical calculations.The error between the measured and theoretical values of the suspension rod force of the completed bridge was within 10%,which was close to the design requirements.Implemented the design of bridge alignment and cable tension.