钢—混凝土组合连续箱梁桥施工控制技术

发布时间：2019-02-17 07:46

【摘要】：本文以港珠澳大桥浅水区非通航85m钢-混凝土组合连续箱梁桥为背景和依托,着眼于钢-混凝土组合连续箱梁桥的施工控制技术,通过有限元软件模拟及现场实际监控,对采取简支变连续施工工艺的钢-混凝土组合箱梁桥的几何线形控制和整体安装控制进行了分析和探讨,具体内容如下:①对钢-混凝土组合连续箱梁桥几何线形控制方法、原则及要点进行了探讨,重点分析不同焊接加工工艺对组合梁钢主梁制造线形控制的影响。②结合有限元模型及实际监测结果,对非对称组合截面形式的钢-混组合箱梁存在的弯扭耦合效应进行了分析,并研究了其对钢-混组合连续箱梁桥整体纵向线形控制的影响以及其对桥面横坡设置的影响。③通过有限元空间精细化模型,模拟分析了施工临时荷载对简支状态钢-混组合箱梁的线形挠度影响及关键构件的应力影响。建立整体全桥模型,分析了施工临时荷载对成桥线形的影响。④介绍了钢-混凝土组合连续箱梁海上整孔吊装架设、简支变连续的施工工艺,分析了钢混组合箱梁大节段对接配切控制的关键影响因素及控制方法,研究了该类桥梁铅芯橡胶支座或高阻尼橡胶支座安装及预偏的自适应控制方法。对目前该类桥梁采取的现场配切技术优、缺点进行了探讨,分析了实现工厂化配切的可能性。本文对跨海整孔架设、简支变连续施工的钢-混凝土组合连续箱梁桥施工控制的关键技术进行了较为详细的分析和研究,对以后类似桥梁的施工控制具有借鉴、参考和指导意义。
[Abstract]:Based on the non-navigable 85m steel-concrete continuous box girder bridge in shallow water area of HongKong-Zhuhai-Macao Bridge, this paper focuses on the construction control technology of the steel-concrete composite continuous box girder bridge, through finite element software simulation and field monitoring. The geometric alignment control and integral installation control of steel-concrete composite box girder bridge with simple support and variable continuous construction technology are analyzed and discussed. The specific contents are as follows: 1 the geometric alignment control method of steel-concrete composite box girder bridge is introduced. The principle and key points are discussed, and the influence of different welding processes on the alignment control of the steel main beam of composite beam is analyzed. 2 combined with the finite element model and the actual monitoring results, The bending and torsional coupling effects of steel-concrete composite box girder with asymmetric composite section are analyzed. The influence on the overall longitudinal alignment control of steel-concrete continuous box girder bridge and its influence on the arrangement of transverse slope of bridge deck are also studied. 3 through the finite-element spatial refinement model, The influence of temporary construction load on the linear deflection of simply supported steel-mixed composite box girder and the stress effect of key components are simulated and analyzed. The model of the whole bridge is established and the influence of the temporary load on the alignment of the bridge is analyzed. 4 the construction technology of hoisting and erecting the whole hole in the sea with the simple support and changing the continuity of the steel and concrete composite continuous box girder is introduced. In this paper, the key factors and control methods of large segment docking and cutting control of steel-concrete composite box girder are analyzed, and the self-adaptive control method for installation and pre-deviation of lead-core rubber bearing or high-damping rubber bearing of this kind of bridge is studied. This paper probes into the advantages and disadvantages of the field matching and cutting technology adopted by this kind of bridge at present, and analyzes the possibility of realizing the factory cutting. In this paper, the key technology of construction control of steel-concrete composite continuous box-girder bridge, which is set up by the whole hole across the sea and changed from simple support to continuous construction, is analyzed and studied in detail, which can be used for reference for the construction control of similar bridges in the future. Reference and guidance significance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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