简支系杆拱应力及线形监控施工技术的应用及研究

Application Study on Stress and Linear Monitoring Construction Technology for Simply-supported Tied Arch

在下承式简支系杆拱施工过程中,应力及线形监控是保证可控施工的措施之一。在梁体及拱肋的控制断面设置应力测试元件及线形监控监测点,采用MIDAS软件建立模型,监测分析各施工阶段的应力及线形变化,确保成桥质量。应力监控与线形监控有效结合,通过测量结果与数据分析来确定桥梁的内力及线形状态,提供理论结果和预警,从而保证桥梁安全有效地组织施工,并进一步论证监控监测及施工控制的有效性。在桥梁施工的每一阶段,通过建模分析、应力监测与线形监控相结合的手段取得结果,作为成桥质量控制的标准依据。依托于施工阶段的监测手段,也可为运营后的监测工作提供部分便利条件。

During the construction of simply-supported tied arch with the deck in bottom, the monitoring of stress and linear was one of the measures to ensure controllable construction. Stress testing elements and linear monitoring points were set up in the control section of girder and arch rib, and the model was established by MIDAS software to monitor and analyze the stress and linear variation in eacli construction stage, so as to ensure the quality of completed bridge. The effective combination of stress monitoring and linear monitoring could determine the internal force and linear shape of the bridge by measuring results and data analysis, and provide theoretical results and early warning, so as to ensure the safe and effective organization and construction of the bridge, and further demonstrate the effectiveness of monitoring and construction control. At each stage of bridge construction, the results were obtained by combining modeling analysis, stress monitoring and linear monitoring as the standard basis of bridge quality control. Depending on the monitoring means in the construction stage, it could also provide some convenient conditions for monitoring after operation.