高峁梁2号大桥连续刚构施工控制研究

发布时间：2018-06-12 10:56

本文选题：桥梁工程 + 高峁梁2号大桥　；参考：《长安大学》2015年硕士论文

【摘要】：由于预应力混凝土连续刚构桥具有跨越能力大、施工方便、适用能力强、无需大型支座的优点,其桥梁建设过程中得到了广泛应用。本文以神河高速公路高峁梁2号大桥为工程实例,根据其施工条件和工程结构特点,对连续刚构0-1#段和边跨现浇段托架施工控制技术、连续刚构挂篮施工控制技术以及其施工监控过程进行了深入系统的研究。(1)连续刚构0#、1#段以及边跨现浇直线段采用托架施工技术。采用midas建立计算模型,对0-1号段墩旁三角托架和双薄壁墩间托架的强度、刚度和稳定性进行验算,其结果满足规范要求。本文从托架的设计与安装、预压、支模、浇筑混凝土、养护等方面,分别就0#、1#段以及边跨现浇直线段托架施工提出控制技术措施。(2)连续刚构箱梁悬臂端采用菱形挂篮施工。采用有限元软件midas/civil2010分挂篮浇筑混凝土阶段和挂篮行走阶段分别进行结构强度及刚度的安全验算,其结果满足规范要求。文中详细从挂篮设计、挂篮加工及拼装预压、悬臂浇筑、梁段接缝处理以及挂篮拆除等几个方面介绍了其施工控制技术。(3)根据高峁梁2号大桥连续刚构施工过程,合理设计了施工监测内容和测试方法。采用同济大学桥梁博士3.03计算程序对桥梁结构进行安全验算。(4)高峁梁2号大桥连续刚构施工监控主要从主梁线形、墩台沉降、结构应力、主桥温度等方面进行。将桥梁施工过程分为五个阶段,针对每个阶段的监控量测数据,分别提出建议措施,保障桥梁施工安全。研究表明,神河高速公路高峁梁2号大桥的施工方法和施工监控技术符合工程要求,确保主桥结构施工的安全,施工阶段桥梁结构的线形与应力变化与设计计算理论接近,成桥后结构的线形及内力分布满足设计和规范要求。
[Abstract]:The prestressed concrete continuous rigid frame bridge is widely used in the process of bridge construction because of its advantages of large span capacity, convenient construction, strong applicability and no need for large supports. Based on the construction conditions and structural characteristics of Gaomaoliang No. 2 Bridge in Shenhe Expressway, the construction control technology of the bracket in 0-1# section of continuous rigid frame and cast-in-place section of side span is introduced in this paper. The construction control technology of continuous rigid frame hanging basket and its construction monitoring process are studied deeply and systematically. The continuous rigid frame 0 #1# section and the side span cast-in-situ straight line section are constructed by bracket construction technology. The strength, stiffness and stability of the bracket between the triangle bracket and the double thin-walled pier in section 0-1 are checked by midas. The results meet the requirements of the specification. In this paper, from the aspects of design and installation of bracket, preloading, supporting mould, pouring concrete, maintenance and so on, this paper puts forward the control technical measures for the construction of the bracket in the 0 #1# section and the side span cast-in-situ straight section respectively. The cantilever end of the continuous rigid frame box girder is constructed with diamond hanging basket. The finite element software midas/civil2010 was used to calculate the structural strength and stiffness in the concrete stage and the walking stage, and the results met the requirements of the code. In this paper, the construction control technology of hanging basket design, hanging basket processing and assembling preloading, cantilever pouring, beam joint treatment and hanging basket removal are introduced in detail. The construction process of continuous rigid frame construction of Gaomao Liang No. 2 Bridge is introduced in detail. Reasonable design of construction monitoring content and test method. The safety check calculation of bridge structure is carried out by using Tongji University bridge doctor's 3.03 program.) the continuous rigid frame construction monitoring of No. 2 Gaomaoliang Bridge is mainly carried out from the aspects of main beam line shape, pier settlement, structural stress, main bridge temperature and so on. The bridge construction process is divided into five stages. According to the monitoring and measuring data of each stage, the proposed measures are put forward to ensure the bridge construction safety. The research shows that the construction method and construction monitoring technology of the No. 2 Gaomaoliang Bridge of Shenhe Expressway meet the engineering requirements, ensure the safety of the construction of the main bridge structure, and the linear and stress changes of the bridge structure in the construction stage are close to the design and calculation theory. The linear and internal force distribution of the structure after completion meets the design and specification requirements.
【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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