近海水闸安全鉴定中水闸破坏因素和规律分析研究

发布时间：2018-04-29 11:36

本文选题：水闸安全鉴定 + 现状检查　；参考：《天津大学》2014年硕士论文

【摘要】：《水闸安全鉴定管理办法》规定水闸要定期进行安全鉴定,本文分析了近海水闸工作的现状及存在的问题。在总结浙江省沿海地区众多水闸安全鉴定工作的基础上,针对沿海地区水闸安全鉴定中发现的问题,分析归纳了其结构、运行、管理等规律特点。为今后水闸安全鉴定工作提出了需要重视的若干要点,对水闸安全鉴定及指导除险加固工程有一定的实际意义。本文总结了近海水闸的工作状态和管理模式,提出了控制运用、工程管理两方面需要关注的重点问题。合理的管理、运行是保证水闸安全的关键。指出近海水闸工程运行过程中所面临的软土基础、海水环境以及错综复杂的自然灾害作用等特色问题。分析了近海水闸所受的荷载类型,并以黎明水闸为例校核了水闸的泄流消能能力。软土基础是近海水闸特点,也是引起过度沉降和不均匀沉降最主要因素。通过对实际工程的安全检测数据分析,和现场的混凝土结构开裂检测都得到证实。通过有桩基础和无桩基础的有限元计算分析,表明了在设计、施工建设时期对软基础的处理的重要性。在日常运行管理中,也需要坚持进行全生命周期的原型观测,建立全自动安全监测系统,防止出现过度沉降和不均匀沉降。混凝土有效强度及钢结构的有效承载力是水闸安全鉴定结果的主要判断依据。在实际检测数据的基础上,本文总结了近海水闸混凝土结构的破坏因素和规律,指出对于沿海环境钢筋混凝土结构的最主要保护措施应是混凝土自身的防护:高性能混凝土和适宜的钢筋保护层厚度。还分析了近海水闸钢结构的锈蚀破坏特点,需要施工和管理部门更加注重对近海水闸的钢结构保护。对于不同位置的钢结构,其锈蚀特点不同,事实证明,由氯离子渗透,即海水环境的污染引起的钢结构锈蚀是近海环境最主要和最常见的破坏因素,应尽可能阻止钢结构的锈蚀,延缓其锈蚀启动时间和锈蚀进程。
[Abstract]:The Management method of Sluice Safety Appraisal stipulates that the sluice should be evaluated regularly. This paper analyzes the present situation and existing problems of offshore sluice work. On the basis of summarizing the safety appraisal work of many sluices in the coastal areas of Zhejiang Province, the characteristics of structure, operation, management and so on are analyzed and summarized in view of the problems found in the safety appraisal of sluices in coastal areas. Some important points should be paid attention to for the safety appraisal of sluice in the future, which is of practical significance to the safety appraisal of sluice and the guidance of the project of eliminating danger and strengthening. In this paper, the working state and management mode of offshore sluice are summarized, and two important problems that need to be paid attention to in the aspects of control and engineering management are put forward. Reasonable management and operation is the key to ensure the safety of sluice. The characteristics of soft soil foundation, seawater environment and complex natural disasters are pointed out in the course of operation of offshore sluice engineering. The load types of offshore sluice are analyzed, and the discharge and energy dissipation capacity of sluice is checked with the example of dawn sluice. Soft soil foundation is the characteristic of offshore sluice, and also the main factor that causes excessive settlement and uneven settlement. Through the analysis of the actual engineering safety test data, and the site crack detection of concrete structures have been confirmed. Through the finite element analysis of pile foundation and without pile foundation, the importance of soft foundation treatment in design and construction period is shown. In the daily operation management, it is also necessary to persist in the prototype observation of the whole life cycle and establish an automatic safety monitoring system to prevent excessive and uneven settlement. The effective strength of concrete and the effective bearing capacity of steel structure are the main basis for judging the safety of sluice. Based on the actual test data, the failure factors and rules of the offshore sluice concrete structure are summarized in this paper. It is pointed out that the main protection measures for reinforced concrete structures in coastal environment should be the protection of concrete itself: high performance concrete and appropriate thickness of reinforced concrete protective layer. The corrosion damage characteristics of offshore sluice steel structure are also analyzed. It is necessary for the construction and management departments to pay more attention to the steel structure protection of offshore sluice. For steel structures in different positions, the corrosion characteristics are different. It has been proved that the corrosion of steel structures caused by chloride ion permeation, that is, pollution of seawater environment, is the main and most common failure factor in offshore environment. The corrosion of steel structure should be prevented as much as possible and the start time and process of corrosion should be delayed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV66

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