桥墩基础局部冲刷抛石防护的研究进展

Reviews on the Development of Riprap Protection to Bridge Piers from Local Scour

抛石作为应用最为广泛的桥墩基础局部冲刷防护措施之一,受到国内外学者的高度关注。系统总结了清水冲刷和动床冲刷条件下的抛石破坏机理,分析了影响抛石稳定性的主要因素,包括抛石粒径、抛石设置位置、抛投范围、抛石层厚度和抛石级配等,对国内外相关研究成果进行了系统评述,并对比分析了抛石稳定性的主要分析方法。针对现有抛石防护方法存在的缺陷,提出了抛石防护未来的研究发展方向和可能的改进措施。

As the most commonly used protection measures to bridge piers from local scour, the riprap protection has attracted a sustained attention from domestic and foreign scholars. The riprap＇ s failure mechanism under clear-water conditions and live-bed conditions are summarized systematically in this paper. Focusing on the factors which can affect riprap stability, including size, placement level, coverage, thickness and gradation of riprap, the author review the research findings from domestic and overseas researchers. Moreover, the analysis methods for riprap stability are compared. Considering the disadvantages of riprap protection, the future development direction and possible improvement measures of riprap protection are suggested furtherly.