中文摘要：

为了保证钢箱梁顶推法施工过程中的安全,以武汉市九龙大桥主桥顶推法施工过程为工程背景,研究钢箱梁顶推过程中临时墩的优化布置以及施工过程中的安全控制问题。根据理论推导,得出顶推过程中临时墩位置最优范围。采用自适应法的控制原理,借用MIDAS/Civil建立顶推施工过程有限元模型,提出顶推法施工过程中安全控制的措施。通过对顶推过程中的位移和应力进行监控测量,得出测试数据,并与理论值进行对比分析,从而指导钢箱梁顶推施工过程中的安全控制。研究结果表明,临时墩布置最优范围能够减小顶推过程对钢箱梁以及临时墩受力的不利影响,采用的安全控制技术能够有效地指导工程施工,方法是可行的。

英文摘要：

In order to ensure the construction safety in the process of steel box girder incremental launch,the pushing construction process of Wuhan Jiulong Bridge is chosen as the example, the safety control problem to optimize the layout of temporary pier of pushing process and construction process of steel box girder are studied. According to the theoretical derivation, the optimal range of temporary pier location in the process of pushing steel box girder is concluded. By using the principle of adaptive control method, based on MIDAS/Civil to establish the finite element model of the process of pushing construction, the safety control measures in the process of pushing construction method is put forward. By monitoring measurements of the displacement and stress in the process of pushing construction, the test data are obtained, and are compared with the theoretical value. The results are used to guide the safety control in the process of pushing steel box girder construction. The results show that the temporary pier layout optimal range can decrease the adverse effect in the process of pushing steel box girder and temporary pier,and safety control technology used to guide the construction is effective and feasible.