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针对空间主缆自锚式悬索桥钢箱梁顶推和体系转换施工期的受力和变形特点,以杭州市江东大桥双塔单跨空间主缆自锚式悬索桥为工程背景,应用有限元软件建立其钢箱梁顶推和体系转换的施工控制仿真计算模型,系统地总结和提出空间主缆自锚式悬索桥钢箱梁顶推和体系转换的施工控制流程和施工监测项目,介绍了钢箱梁顶推施工和体系转换的最终方案,给出了空间主缆自锚式悬索桥体系转换的施工控制原则。提出了空间主缆自锚式悬索桥销铰式吊索索夹预偏角度的确定思路,给出了销铰式吊索索夹角度的测试方法。钢箱梁顶推和体系转换完成后,线形、应力、索力和索夹角度的测试结果验证了提出的施工控制方法和施工控制流程是合理的。
Aiming at the characteristics of the force and deformation during the construction of the main girder self-anchored suspension bridge with steel girder, and the conversion of the system during construction, the main cable self-anchored suspension bridge with double towers and single tower in Jiangdong Bridge of Hangzhou is taken as the background. The construction control simulation calculation model of the steel box girder jacking and system conversion, systematically summarizes and proposes the construction control flow and the construction monitoring project of the steel box girder jacking and system conversion of the main cable self-anchored suspension bridge in space, and introduces the steel box girder Push the construction and system conversion of the final program, given the space main cable self-anchored suspension bridge system conversion principle of construction control. The method to determine the pre-deflection angle of the pin-type suspension sling of the main cable self-anchored suspension bridge was proposed, and the test method for the angle of the pin-type slings was given. After the steel box girder jacking and system conversion are completed, the test results of linear, stress, cable force and cable clamp angle verify that the proposed construction control method and construction control flow are reasonable.