宁启既有线桥涵近接施工风险评价系统研究

发布时间：2018-03-11 19:29

本文选题：既有线桥涵近接施工　切入点：风险识别　出处：《武汉理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国交通运输量的增加,大量在既有线旁修建新线、一次性建成复线、新建铁路与公路交叉等桥涵近接工程蓬勃发展,新建桥涵必然会对既有结构物产生不利影响。由于桥涵近接施工工序复杂、对周围环境影响大、不确定性与模糊性影响因素多、安全控制要求高,缺乏了解和风险管理重视不够等问题,导致施工过程中工程事故时有发生。因此,进行既有线桥涵近接施工安全风险研究,建立风险评价系统,及时发现和防范危险,控制事故的发生,从而确保桥涵近接施工过程的安全,是十分有必要的。依托“基于铁路营业线桥涵近接施工防护的自动化监测系统应用研究”项目,通过现场跟踪实习,结合系统安全工程和风险管理相关理论,通过定性和定量分析对桥涵近接施工过程中的风险进行系统研究,设计一套适合既有线桥涵近接施工的风险评价系统。主要研究内容包括:(1)介绍风险评估流程和方法,分析既有线桥涵近接施工工艺和流程,研究桥涵近接施工特点及风险,对施工过程中的危险源进行识别;利用事故树分析施工过程中发生的典型事故,求出其最小割集、最小径集和结构重要度。针对识别出的危险源,运用LEC法进行评价,划分等级,识别出主要危险源,并制定相应的控制措施。(2)确定既有线桥涵近接施工风险指标体系,采用聚类群组层次分析法计算风险指标权重,运用灰色综合评价法计算风险分值,构建既有线桥涵近接施工风险评价模型,得出风险值及风险等级,给出控制措施。(3)结合项目安全管理需求,设计宁启既有线桥涵近接施工风险评价系统,确定系统的功能需求和系统总体框架。最后运用SQL Server 2008作为安全信息存储数据库,通过C#可视化开发语言,在Visual Studio平台上进行评价系统的二次开发,对系统详细功能进行介绍。
[Abstract]:With the increase of traffic and transportation volume in our country, a large number of new lines have been built next to the existing lines, a one-off double line has been built, and bridges and culverts close to each other, such as new railways and highways, have developed vigorously. The new bridge and culvert will inevitably have an adverse effect on the existing structure. Because of the complexity of the construction procedure of the bridge and culvert close to the bridge and culvert, it has a great impact on the surrounding environment, many factors affecting the uncertainty and fuzziness, and high requirement of safety control. Lack of understanding and insufficient attention to risk management lead to frequent accidents in the construction process. Therefore, it is necessary to study the safety risk of the bridge and culvert close to the existing railway, to establish a risk assessment system, and to detect and guard against the danger in time. It is necessary to control the occurrence of accidents and ensure the safety of bridge and culvert close connection construction process. Relying on the project of "Application Research of automatic Monitoring system based on Railway operating Line Bridge and culvert close connection Construction Protection", it is necessary to follow up practice on the spot. Combined with the theory of system safety engineering and risk management, the risk in the process of bridge and culvert close connection construction is systematically studied by qualitative and quantitative analysis. A set of risk evaluation system is designed for bridge and culvert close connection construction on existing railway lines. The main research contents include: 1) introducing risk assessment process and method, analyzing the construction technology and process of bridge and culvert close connection, studying the characteristics and risks of bridge and culvert proximity construction. The hazard sources in construction process are identified, the typical accidents occurring during construction are analyzed by accident tree, and the minimum cut set, minimum path set and structural importance are obtained. The LEC method is used to evaluate the identified hazard sources. The risk index system of the bridge and culvert close to the existing railway is determined, and the weight of the risk index is calculated by cluster group analytic hierarchy process (AHP). Using the grey comprehensive evaluation method to calculate the risk score, to construct the risk evaluation model of the bridge and culvert close to the existing railway, to obtain the risk value and the risk grade, and to give the control measures. This paper designs a risk assessment system for bridge and culvert close connection construction of Ningqi existing railway line, determines the functional requirements of the system and the overall framework of the system. Finally, SQL Server 2008 is used as the security information storage database, and the C # visual development language is used to develop the system. The secondary development of the evaluation system is carried out on the platform of Visual Studio, and the detailed functions of the system are introduced.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445;U449

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