基于层次分析法的AP1000核电站CA20模块单墙板施工变形分析及优化

发布时间：2018-07-09 09:44

本文选题：层次分析法 + 模块化施工　；参考：《宁波大学》2014年硕士论文

【摘要】：核能发电是核能和平利用的重要形式,核能发电不仅是国民经济发展的重要支撑,更是国家工业实力的体现。在国际社会越来越关注低碳排放时,核电站以其零碳排放及单机组发电功率大等特点在能源发展新趋势中的地位尤为突出。AP1000技术作为第三代先进压水堆核电技术的代表,因其非能动的安全设计与模块化施工等特点,受到了国际核能行业的瞩目。在国家大力发展清洁能源的背景下,AP1000全球首堆落地浙江三门核电1号机组,成为国家引进AP1000技术的依托项目。在首台AP1000机组的建设中,因其独有的模块化施工特点及相关安全设计,建造过程中没有现成的核电建造经验可以参照。其施工过程注定是将先进的第三代核电技术从图纸搬到现实的探索之路,更是积累先进核电建造经验,为后续核电项目铺设腾飞之路的开拓之举。因此,做好施工建设问题的分析与总结,并提出切合现实的优化措施对于今后我国的核电建设具有重要的实际意义。在三门核电1号机组的建设过程中,模块化施工遇到了许许多多形式各异的问题,其中影响施工关键路径的问题尤为重要,CA20模块单墙板施工变形便是其中之一。本文从CA20模块单墙板施工过程切入,以施工记录中的大量数据为依据,对不同施工阶段中CA20模块单墙板施工变形超差问题进行了全面分析。主要的影响因素包括了:子模块预制、运输;组对、焊接;翻转吊耳焊接;组件翻转竖立;CA20模块整体吊装;CA20模块外侧混凝土浇筑等。本文针对子模块组装焊接阶段、CA20模块整体吊装后混凝土浇筑阶段的若干影响因素采取适合的分析方法,如数据统计理论计算和有限元建模分析等方法。通过数据分析,得出单墙板变形在一系列施工阶段中的变化趋势及相应的影响因素。针对工程施工中影响因素多且错综复杂互相影响的特点,应用层次分析法将复杂的问题表示为有序的递阶层次结构,有效地解决了定性、定量的多变量的多准则判断问题。借用层次分析法对影响因素的重要性进行了研究,得出结论,影响因素权重排序依次是:混凝土浇筑环节变形、组对焊接组装变形、整体吊装变形、组件翻转变形、焊接应力释放变形、预制运输变形。此分析结果对后续核电站的模块化施工提供了优化施工管理的依据和实践经验,有利于后续同类施工的质量控制管理。在层次分析法分析判断结果的基础上,有针对性地提出解决与优化对策,使复杂的工程问题层层剥离,有效地解决了多因素相互交织的情况。通过应用层次分析法对实际AP1000核电站建造的模块施工问题的分析,为今后的模块化施工应用积累了更多的宝贵经验。
[Abstract]:Nuclear power generation is an important form of peaceful use of nuclear energy. Nuclear power generation is not only an important support for the development of the national economy, but also a reflection of the national industrial strength. At a time when the international community is paying more and more attention to low carbon emissions, the status of nuclear power plants in the new trend of energy development is particularly prominent because of their characteristics of zero carbon emissions and large power generation of single units. AP1000 technology is regarded as the representative of the third generation advanced PWR nuclear power technology. Because of its characteristics of inactive safety design and modular construction, it has attracted the attention of the international nuclear energy industry. Under the background of the development of clean energy in the country, the first pile of AP1000 nuclear power unit of Zhejiang Sanmen Nuclear Power Plant No. 1 has been built up in the world, and it has become a supporting project for the introduction of AP1000 technology by the country. In the construction of the first AP1000 unit, due to its unique modular construction characteristics and related safety design, there is no ready-made experience in nuclear power construction. The construction process is destined to move the advanced third-generation nuclear power technology from drawing to reality, and also to accumulate advanced nuclear power construction experience and pave the way for future nuclear power projects to take off. Therefore, it is of great practical significance to do well the analysis and summary of construction problems and put forward some practical optimization measures for nuclear power construction in China in the future. In the process of construction of Sanmen No.1 nuclear power unit, modularization construction has encountered many problems of different forms, among which the problem affecting the key path of construction is especially important. The construction deformation of CA20 module single wall board is one of them. In this paper, from the construction process of CA20 module single wall board, based on a large number of data in construction records, this paper makes a comprehensive analysis of the problem of deformation excess in construction of CA20 module single wall board in different construction stages. The main influencing factors include: submodule prefabrication, transportation; group pair, welding; overturning hoisting and hoisting CA20 module; integral hoisting of CA20 module; external concrete pouring of CA20 module, etc. In this paper, suitable analysis methods, such as data statistic theory calculation and finite element modeling analysis, are adopted for some factors affecting concrete pouring stage after integral hoisting of CA20 module in submodule assembly and welding stage. Through data analysis, the variation trend of single wall board deformation in a series of construction stages and the corresponding influencing factors are obtained. In view of the fact that there are many factors affecting each other in engineering construction, the analytic hierarchy process (AHP) is applied to express the complex problems as an orderly hierarchical structure, which effectively solves the problem of qualitative and quantitative multivariable multicriteria judgment. The importance of influencing factors is studied by using AHP. It is concluded that the order of weight of influencing factors is: deformation of concrete pouring link, deformation of welding assembly, deformation of integral hoisting, deformation of overturning component, and so on. Welding stress release deformation, prefabricated transport deformation. The result of this analysis provides the basis and practical experience for optimizing construction management for the modular construction of the subsequent nuclear power plant, and is conducive to the quality control management of the similar construction in the follow-up. On the basis of the analytic hierarchy process (AHP) analysis and judgment results, the solutions and optimization measures are put forward in order to make the complex engineering problems peel off layer by layer, which effectively solves the interwoven situation of multiple factors. Through the application of analytic hierarchy process (AHP) to the practical AP1000 nuclear power plant construction module construction problem analysis, for the future modular construction application accumulated more valuable experience.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM623

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