独塔四索面空间异形斜拉桥施工控制技术分析

发布时间：2018-08-07 18:39

【摘要】：宁波外滩大桥是一座独塔四索面异形斜拉桥,为确保桥梁结构在施工过程中和成桥状态下的安全和稳定性,保证桥梁结构成桥状态的线形和内力值符合要求,对施工过程进行模拟计算和分析,结合该桥特点分析了该桥施工控制过程的重点和难点,确定了主塔和主梁的应力、主塔偏位和主梁的线形、斜拉索索力等作为主要控制内容,以及相应的测量方法。在主塔施工、中跨主梁梁段施工、合龙段施工和成桥施工4个主要施工阶段分别监测各个主要控制内容,通过监测数据判断施工过程中各主要控制内容是否符合设计要求。另外,在成桥阶段进行了全桥通测,得到成桥状态下的线形和结构内力值与理论计算值的拟合情况,从而确定此研究控制理论和方法在工程实例应用中的可行性。
[Abstract]:Ningbo Buntan Bridge is a single tower and four cable plane special-shaped cable-stayed bridge. In order to ensure the safety and stability of the bridge structure during the construction process and the state of the bridge, the linear and internal force values of the bridge structure meet the requirements. The simulation calculation and analysis of the construction process are carried out, the key points and difficulties of the bridge construction control process are analyzed according to the characteristics of the bridge, the stress of the main tower and the main beam, the deviation of the main tower and the alignment of the main beam, the cable force of the stay cable are determined as the main control contents. And the corresponding measurement method. In the main tower construction, the middle span main girder section construction, the closure section construction and the complete bridge construction four main construction stages respectively monitors each main control content, through the monitoring data judges each main control content in the construction process whether conforms to the design request. In addition, in the stage of bridge completion, the whole bridge test is carried out, and the fitting results of the linear and structural internal force values and the theoretical calculated values under the state of bridge completion are obtained, and the feasibility of the research control theory and method in the application of the control theory and method in engineering examples is determined.
【作者单位】：中交第二公路勘察设计研究院有限公司;
【分类号】：U448.27;U445.4

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