基于耐久性能的混凝土桥梁标准化施工技术研究

发布时间：2018-05-08 23:20

本文选题：混凝土桥梁 + 桥梁耐久性　；参考：《郑州大学》2017年硕士论文

【摘要】：公路混凝土桥梁的耐久性设计、耐久性施工及后期的检测与维护是提高桥梁耐久性的三个主要方面。其中,施工阶段作为桥梁全寿命周期的重要阶段,由于受到复杂的施工环境、经济环境、社会环境和人为因素等的影响,而成为确保桥梁耐久性的关键环节。树立耐久性施工理念,严格按照耐久性要求进行标准化施工,确保施工质量,可以起到事半功倍的效果。本文以桥梁耐久性为主线,以德商高速和南林高速濮阳境段桥梁工程建设为依托,将桥梁耐久性与桥梁施工有机结合,开展了基于耐久性能的混凝土桥梁标准化施工技术的系统研究,主要研究内容如下:(1)根据工程实际调查结果,对桥梁工程耐久性损伤以及常见病害的成因进行了分析,并主要基于施工角度对影响桥梁耐久性的因素进行了系统的分析。(2)根据各因素引起桥梁耐久性损伤的机理,分析了混凝土桥梁常见的耐久性病害:从施工技术和管理角度分析了裂缝及钢筋锈蚀的成因,有针对性的提出了控制裂缝和钢筋锈蚀的措施;系统地分析了桥面铺装和伸缩缝病害类型、病害原因,并从施工和养护管理等方面提出了针对性的建议。(3)采用灰色神经网络控制方法,通过预测混凝土的强度及耐久性能优选配合比;通过预测悬臂施工箱梁安装高程对混凝土桥梁进行施工控制。(4)标准化施工是实现桥梁建设目标、提高桥梁耐久性的最直接和最重要技术举措。桥梁的施工过程极其复杂,规范各种施工行为(包括管理行为)意义重大。本文详细论述了桥梁基础施工、桥梁下部结构施工、桥梁上部构造施工的标准化施工流程和施工工艺,并将桥梁标准化施工与桥梁的耐久性能要求有机结合,在依托工程的桥梁施工中进行了应用研究,取得了显著效果,为混凝土耐久桥梁的建设提供了重要的技术保障。
[Abstract]:The durability design, durability construction and later detection and maintenance of highway concrete bridges are the three main aspects to improve the durability of bridges. As an important stage of the bridge life cycle, the construction stage is affected by complex construction environment, economic environment, social environment and human factors, and becomes the key link to ensure the durability of the bridge. Establishing the concept of durability construction, strictly according to the requirements of durability standardization construction, to ensure the quality of construction, can play a multiplier effect with half the effort. In this paper, the durability of the bridge is taken as the main line, and the bridge construction in Puyang section of the German and Shang Expressway and Nanlin Expressway is taken as the basis, which combines the durability of the bridge with the construction of the bridge. A systematic study on the standardized construction technology of concrete bridges based on durability is carried out. The main research contents are as follows: (1) according to the actual investigation results of the project, the causes of durability damage and common diseases of bridge engineering are analyzed. Based on the construction angle, the factors affecting the durability of the bridge are analyzed systematically. 2) according to the mechanism of the damage caused by each factor, This paper analyzes the common durability diseases of concrete bridges: analyzes the causes of cracks and steel corrosion from the point of view of construction technology and management, and puts forward some measures to control the cracks and reinforcement corrosion; This paper systematically analyzes the types and causes of bridge deck pavement and expansion joint diseases, and puts forward some pertinent suggestions from the aspects of construction and maintenance management. The grey neural network control method is adopted. By predicting the strength and durability of concrete, selecting the optimum proportion of concrete, and predicting the erection height of cantilever construction box girder to control the construction of concrete bridge, the standard construction of concrete bridge is achieved. The most direct and important technical measures to improve bridge durability. The construction process of bridges is extremely complex, and it is of great significance to standardize various construction behaviors (including management behaviors). This paper discusses in detail the construction process and construction technology of bridge foundation construction, bridge substructure construction, bridge superstructure construction, and organically combines the bridge standardized construction with the bridge durability requirements. The application research in bridge construction based on engineering has obtained remarkable effect and provided important technical guarantee for the construction of concrete durable bridge.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4

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