丁坝可靠度和设计使用年限研究

发布时间：2018-04-21 14:30

本文选题：丁坝 + 可靠度　；参考：《重庆交通大学》2014年硕士论文

【摘要】：在航道整治和维护过程中，丁坝作为常见的整治建筑物形式，起到束窄水流、冲深河槽的作用。本文依托交通运输部黄金水道通过能力提升技术重大专项“整治建筑物的可靠度和设计使用年限研究”展开，将长江中游荆江河段航道整治工程作为依托工程。针对如何保障整治建筑物的稳定、确保工程质量安全和效果、降低工程维护成本等技术难题和航道整治工程中整治建筑物可靠度设计分析方法相对落后的现状，通过原型观测、理论分析和水槽试验相结合的技术手段，在对丁坝类整治建筑物现状调查及损毁原因分析的基础上，开展了对抛石丁坝可靠度和设计使用年限的研究，给出抛石块体稳定受力模型，，并构建了基于三参数威布尔分布的抛石丁坝可靠度模型，提出了受年际不同洪峰流量的洪水作用后丁坝剩余寿命计算方法。由于抛石丁坝结构复杂，影响其水毁的不确定因素众多，因此采用量纲分析法建立抛石丁坝水毁程度量化公式，将丁坝水毁程度与其影响因素直接联系起来，建立了基于水毁体积比的抛石丁坝安全性判别分析方法，能够定量反映水毁因素与水毁程度之间的关系，从回归方程的计算结果来看，计算值和试验数据吻合较好，可为实际工程设计和维护提供参考依据。
[Abstract]:In the course of channel regulation and maintenance, spur dike, as a common form of regulation building, plays the role of narrow flow and deep channel. Relying on the golden waterway of the Ministry of Communications and Transport, the project of channel regulation in the middle reaches of Jingjiang River of the Yangtze River is regarded as the supporting project through the important project of "study on the reliability and design life of the renovated buildings", which is a major technical project of the Ministry of Communications and Transport. In view of the technical problems such as how to ensure the stability of the renovated buildings, ensure the safety and effect of the engineering quality, reduce the maintenance cost of the project and the relatively backward design and analysis methods of the reliability of the renovated buildings in the waterway regulation works, the prototype observation is carried out. On the basis of the investigation of the present situation and the cause of damage of the groyne regulation buildings, the reliability and design life of the gromping spur dike are studied by combining the theoretical analysis with the flume test. This paper presents a stable stress model for a riprap block, constructs a reliability model of a syringe based on a three-parameter Weibull distribution, and puts forward a method for calculating the residual life of a spur dike after flooding with different annual discharge of Hong Feng. Because of the complexity of the structure and the large number of uncertain factors affecting the water damage, the quantitative formula of the water damage degree of the syringe dike is established by using the dimensional analysis method, and the degree of water damage is directly related to the influencing factors. A safety discriminant analysis method based on the volume ratio of water damage is established, which can quantitatively reflect the relationship between the damage factors and the degree of water damage. From the results of the regression equation, the calculated values and the experimental data are in good agreement with each other. It can provide reference for actual engineering design and maintenance.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U617.91

【参考文献】