跨既有铁路线连续箱梁桥转体施工技术研究

发布时间：2019-04-22 10:02

【摘要】：目前,我国交通事业发展迅猛,每年均有大量的高速铁路、公路得以兴建。当新建道路工程遇到需上跨既有线路时,将不得不面临影响运营、施工难度大等问题,为避免或最大程度的减少对已有线路运营的影响,保证已有线路各方面安全,越来越多的开始采用桥梁转体施工技术,但转体施工往往面临着工期短、施工风险高、技术要求严格,工艺流程紧凑等问题,施工环节质量控制要求高,风险预测和评估难度大,因此探讨桥梁转体施工技术是一项十分必要的课题。芦槎冲特大桥跨铁路转体桥是蒙自绕城高速公路羊街至鸡街项目的重点工程,是云南省首座跨铁路高速公路转体桥,具有平面转体重量大,施工精度高等特点。本文结合工程实例,对跨既有铁路线连续箱梁桥转体施工技术进行了研究,以期为今后的同类型工程施工提供参考,本文主要内容如下:1、结合工程实例阐述了桥梁转体平转法具体施工方案与主要施工过程,分析了在施工过程中存在的技术问题,对转体系统的工艺质量要点提出了新的见解,并提供了施工建议;2、优化转体施工方案,在流程控制,转体前准备、转体时间计算及控制、桥梁转体等环节,做出优化设计,通过研究发现应当尤其重视施工中的监控,对重点部位施工全过程进行监控量测,依据实时数据指导施工;3、对桥梁转体施工安全风险进行全面的分析评估,并通过风险矩阵法计算出风险源的风险综合等级,经研究表明混凝土浇筑质量、起重设备、高空物体坠落是风险较高的风险类型;4、对施工中存在的施工安全风险、劳动安全风险进行研判,并提出控制措施;同时相应的进行了应急预案设计,为同类型工程的施工组织设计提供了可参考方案。
[Abstract]:At present, China's transportation industry is developing rapidly, every year there are a large number of high-speed railways, roads can be built. When a new road project meets with the need to span existing lines, it will have to face problems such as affecting operation and difficult construction. In order to avoid or minimize the impact on the operation of existing lines, and to ensure the safety of all aspects of existing lines, More and more bridge rotating construction technology has been adopted, but the rotary construction is often faced with problems such as short construction period, high construction risk, strict technical requirements, compact technological process, and high quality control requirements in construction links. It is very difficult to predict and evaluate the risk, so it is necessary to discuss the technology of bridge rotation construction. Lucha Chong Bridge is the key project of the project from Yangjie to Jijie of the Inner Mongolia-Zicheng Expressway. It is the first trans-railway highway turnaround bridge in Yunnan Province. It has the characteristics of large weight of plane rotation and high construction precision. In this paper, combined with engineering examples, the rotating construction technology of continuous box girder bridge spanning existing railway lines is studied in order to provide reference for future construction of the same type of engineering. The main contents of this paper are as follows: 1, Combined with engineering examples, this paper expounds the concrete construction scheme and main construction process of the bridge rotation method, analyzes on the technical problems existing in the construction process, puts forward some new opinions on the key points of the process quality of the rotating body system, and provides construction suggestions. 2, optimize the turnaround construction scheme, make optimal design in process control, preparation before turning, calculation and control of rotation time, bridge rotation, etc. Through the research, we should pay special attention to the monitoring and control in the construction. Monitor and measure the whole construction process of the key parts, guide the construction according to the real-time data; 3, comprehensive analysis and evaluation of the safety risk of bridge rotation construction, and risk matrix method to calculate the risk of the comprehensive grade of risk sources, through the study shows that the quality of concrete pouring, lifting equipment, High altitude object fall is a high risk type; 4. The construction safety risk and labor safety risk existed in construction are studied and judged, and the control measures are put forward. At the same time, the emergency plan design is carried out, which provides a reference scheme for the construction organization design of the same type of engineering.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4

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