城际大跨度连续梁桥悬臂与支架结合施工线形监控研究

Research on Monitoring of Lifted Arm and Bracket in Continuous Beam Bridge

以京津城际跨五环路特大跨预应力混凝土连续梁桥为工程背景,围绕施工控制结构计算和施工现场监测,介绍施工中位移监测点的布置及立模标高的设置,采用Midas/civil软件建立结构计算模型,得出不同施工阶段梁体挠度、预拱度的理论值,并将其与实测值进行比较分析,结果表明该桥施工控制模拟计算方法是正确的,从而保证施工中结构的安全以及成桥后结构状态符合设计的预期目标.

Taking the large-span bridge with continuous beam in No.5 ring road between Beijing city and Tainjin city as an example,location ol monitoring point and configuration ol elevation are introduced during process ol structure computing and monitoring. We used Midas/civil software to compute value oi deflection and pre- cam- ber, and compared theoretical value with real value. The results show that simulation method is right and can guarantee the security status of bridge to meet expected demand.