大跨度混凝土连续刚构桥悬浇施工控制技术研究

发布时间：2018-03-18 10:13

本文选题：大跨度连续刚构桥　切入点：施工控制　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：大跨度连续刚构桥以跨越能力大、施工难度小、行车舒顺、养护简便、造价较低等其自身特有的优势在我国公路和铁路交通中得到越来越广泛的发展。施工控制是大跨径连续刚构桥施工中必不可少的一部分,主要包括线形控制和应力控制两方面,施工控制的目标是保证大跨度连续刚构桥的成桥线型与设计吻合良好,以及结构在施工过程中的安全。本文综述了大跨度桥梁施工控制结构分析的主要计算方法(正装计算法和倒装计算法),指出了适合大跨度连续刚构桥施工控制的计算方法。以保阜高速公路某特大桥为工程背景,运用MIDAS CIVIL建立有限元仿真计算模型,给出了结构在最大悬臂状态和成桥状态下的内力(弯矩、剪力)、应力和挠度计算结果;对保阜高速某特大桥施工过程进行控制,详细介绍线形控制、应力控制的内容,并对施工控制的监测数据进行了分析;选取结构自重、混凝土弹性模量、混凝土收缩徐变、预应力参数等设计参数,对这些参数引起的结构状态偏差进行了敏感性分析。本文研究成果,已经成功地应用于依托工程-保阜高速公路某特大桥施工控制全过程。
[Abstract]:The long-span continuous rigid frame bridge has the advantages of large span capacity, small construction difficulty, smooth running and easy maintenance. Its unique advantages, such as low cost, have been more and more widely developed in highway and railway traffic in our country. Construction control is an essential part in the construction of long-span continuous rigid frame bridge, which mainly includes linear control and stress control. The goal of construction control is to ensure that the bridge alignment of long-span continuous rigid frame bridge is in good agreement with the design. And the safety of structure during construction. This paper summarizes the main calculation methods of construction control structure analysis of long-span bridge, such as formal and inverted calculation, and points out the suitable for construction control of long-span continuous rigid frame bridge. Calculation method. Taking a large bridge in Baofu Expressway as the engineering background, The finite element simulation model is established by using MIDAS CIVIL, and the calculation results of internal forces (bending moment, shear force, stress and deflection) under the maximum cantilever state and bridge state are given, and the construction process of a super large bridge at Baofu Expressway is controlled. The contents of linear control and stress control are introduced in detail, and the monitoring data of construction control are analyzed, and the design parameters such as structural weight, elastic modulus of concrete, shrinkage and creep of concrete, prestress are selected. The sensitivity analysis of the structural state deviation caused by these parameters has been carried out. The research results in this paper have been successfully applied to the whole construction control process of a large bridge in Baofu Expressway.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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