蜀河水电站弧形闸门原型观测试验研究

随着我国水利水电工程技术的发展,越来越多的大尺寸弧形闸门投入使用,对弧形闸门的原型观测试验技术手段提出了更高的要求。在现阶段国内外尚无水工金属结构设备原型观测专项技术标准状况下,本文针对弧形闸门的工作特点,提出了弧形闸门原型观测试验整体技术方案。并以蜀河水电站泄洪闸2#弧形闸门原型观测试验为例,通过采用先进的测量仪器和数据分析技术,对弧形闸门的结构应力、位移、动力特性、振动响应、启闭力等各项工作特性参数进行了综合评价和分析。发现了支臂侧向作用面上承受较大弯矩、下泄水流的动水荷载与弧形闸门和闸墩的低频区已形成不利组合、启门瞬间液压启闭机的启门力超出启闭机容量等弧形闸门的运行安全隐患,对确保工程安全具有一定的参考价值。

Study on prototype experiment of radial gates at Shuhe hydropower station

As hydraulic engineering technology is developing in China, increasingly more large-size radial gates come into use and the technologies of radial gate prototype tests must meet higher requirements. At present stage, no specialized norms for the prototype test technologies of hydraulic metal structures are available yet in China or overseas. This paper presents a comprehensive technical solution to the prototype experiment of radial gates based on analysis of their characteristics. In a case study of radial gate No.2 at the Shuhe hydropower station, we have adopted advanced technologies of instrumentation and data analysis and conducted a comprehensive evaluation and analysis on its characteristic parameters of working conditions, such as stress in main structures, deformation, dynamic characteristics, vibration responses, and operation forces. The results reveal incipient faults in gate operation ? gate arms laterally subjected to a large bending moment, unfavorable interaction of dynamic water load with low-frequency zones behind the gate and piers, and an instantaneous initial lifting force beyond the hydraulic hoist capacity. The findings are useful to ensure engineering safety and improve designs of radial gates.