联锁混凝土块在护岸结构中的应用研究

发布时间：2018-03-31 15:12

本文选题：联锁混凝土块　切入点：护岸设计　出处：《山东大学》2017年硕士论文

【摘要】：我国江河纵横、湖泊星罗棋布,随着社会经济的不断发展和生态环保理念的不断加强,水域治理的水平和要求也大幅提高。护岸结构作为治理的重点工程,应既能保证坡岸的稳定,避免水土流失,又充分考虑生态环保的功能,近年来,一种很好满足上述功能的护岸结构——联锁混凝土块护岸正在被广泛应用。本文总结了现有的联锁混凝土块护岸的设计方法,分析了风浪、船行波等因素对护岸的影响及破坏机理并列举了相关计算公式。依托两处典型的联锁混凝土块护岸工程:京杭大运河济宁段和南水北调大屯水库工程,利用理论分析、室内试验和数值模拟等综合研究手段开展了联锁混凝土护岸系统的相关设计方法、稳定性和耐久性等方面的研究,主要结论包括:(1)通过试验和数值模拟的方式对目前常用的的联锁混凝土块按照不同设计形式对稳定性的影响作了分类,给出了不同设计形式的应用建议。(2)设计了能够适应多种联锁混凝土块型式的压力加载试验装置,有利于快速测试联锁块的嵌锁强度和破坏模式,为联锁块的设计改进提供了辅助工具。(3)通过ADINA和ABAQUS两种有限元软件的联合建模,完善了船形波在数值模拟中的加载方法,对船行波作用下的联锁混凝土块护岸进行了多种工况的模拟研究,得出了不同联锁块表面尺寸、厚度、开孔率和不同波峰线与岸边水线夹角等工况下联锁混凝土护岸的变形特征及破坏模式,明确了厚度是影响其稳定性的首要因素,波峰线与岸边水线夹角应作为重要参数对船行波压力进行折减的相关结论。(4)为解决北方冬季容易出现的护岸冻融破坏问题,开展了混凝土冻融损伤室内试验,研究了不同水胶比、粉煤灰和外加剂掺量对混凝土抗冻性能、表面损伤、质量损失、相对动弹性模量、抗压强度等方面的影响,为联锁混凝土块配合比设计提供了依据。
[Abstract]:With the continuous development of social economy and the continuous strengthening of the concept of ecological environmental protection, the level and requirements of water area management have also been greatly improved. The revetment structure is regarded as the key project of governance. It should not only guarantee the stability of slope bank, avoid soil erosion, but also fully consider the function of ecological and environmental protection. The interlocking concrete block revetment, a kind of revetment structure which can well satisfy the above function, is widely used. This paper summarizes the design methods of interlocking concrete block revetment, and analyzes the wind and waves. Based on two typical interlocking concrete block revetment projects: Jining section of Beijing-Hangzhou Canal and Datun Reservoir of South-to-North Water diversion Project, theoretical analysis is used. Laboratory tests and numerical simulations have been conducted to study the design methods, stability and durability of interlocking concrete revetment systems. The main conclusions include: (1) the effects of different design forms on the stability of interlocking concrete blocks are classified by means of experiments and numerical simulation. The application suggestion of different design forms is given. (2) A pressure loading test device which can adapt to various interlocking concrete blocks is designed, which is helpful for fast testing the interlocking strength and failure mode of interlocking blocks. This paper provides an assistant tool for the improvement of interlocking block design. Through the combined modeling of ADINA and ABAQUS, the loading method of ship wave in numerical simulation is improved. The simulation of interlocking concrete block revetment under the action of ship traveling wave is carried out under various working conditions, and the surface size and thickness of different interlocking blocks are obtained. The deformation characteristics and failure mode of interlocking concrete revetment under different conditions, such as opening rate and angle between wave peak line and shore waterline, are determined. It is clear that thickness is the most important factor affecting the stability of interlocking concrete bank. Conclusion that the angle between peak line and shore waterline should be used as an important parameter to reduce ship traveling wave pressure. In order to solve the problem of freeze-thaw damage of bank protection in northern winter, laboratory tests of concrete freeze-thaw damage have been carried out. The effects of different water / binder ratio, fly ash and admixture on the frost resistance, surface damage, mass loss, relative dynamic elastic modulus and compressive strength of concrete are studied.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV861

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