长山跨海混凝土桥梁耐久性监测研究

发布时间：2018-03-13 03:00

本文选题：跨海桥梁　切入点：钢筋混凝土　出处：《大连海事大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文结合长海长山跨海大桥的实际服役特点,对北方冰冻海洋环境混凝土桥梁耐久性监测技术所涉及的关键问题开展系统、深入的研究,建立耐久性监测和评估方法,开发跨海大桥耐久性监测系统。主要研究内容包括:(1)海洋环境的长期监测研究:对施工现场温度、湿度和水温的人工监测,了解现场环境因子的变化情况,监测结构所处环境温度、湿度、有害介质浓度等环境因子。(2)施工期混凝土性能监测技术研究:监测大桥施工过程中混凝土工作性能、混凝土早期强度、氯离子渗透性等参数的发展过程,揭示海洋环境现场施工条件对混凝土性能的影响规律。(3)混凝土构件耐久性监测研究:考察桥梁各部位耐腐蚀薄弱部位,确定采用梯形阳极检测系统监测混凝土内部钢筋锈蚀情况,探讨阳极梯监测数据与混凝土内部钢筋锈蚀率之间的关系,实现利用阳极梯信号评价混凝土内部钢筋的表面状态。(4)跨海桥梁耐久性监测技术开发:基于现场监测和实验室研究成果,开发长海县跨海大桥耐久性监测系统,为跨海混凝土桥梁的日常维护和安全运营提供科学的依据和参考。
[Abstract]:Combined with the actual service characteristics of Changshan Bridge in Changhai, this paper systematically and deeply studied the key problems involved in the durability monitoring technology of concrete bridges with frozen marine environment in the north, and established the method of durability monitoring and evaluation. Development of durability Monitoring system for Sea-Crossing Bridge. The main research contents include: 1) Long-term monitoring of marine environment: manual monitoring of temperature, humidity and water temperature at construction site, and understanding of changes in field environmental factors, Monitoring environmental factors such as temperature, humidity, concentration of harmful media, etc.) during the construction period, the study of concrete performance monitoring technology: monitoring the performance of concrete during the construction of the bridge, early strength of concrete, The development process of chloride ion permeability and other parameters reveals the influence of construction conditions of marine environment on concrete performance. The corrosion of steel bar inside concrete is monitored by ladder anode detection system, and the relationship between the monitoring data of anode ladder and the corrosion rate of steel bar inside concrete is discussed. The development of durability monitoring technology for cross-sea bridge using anode ladder signal to evaluate the surface condition of concrete inner reinforcement. Based on the field monitoring and laboratory research results, the durability monitoring system of Changhai cross-sea bridge is developed. It provides scientific basis and reference for daily maintenance and safe operation of cross-sea concrete bridge.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U446

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