白鹤滩水电站反拱型水垫塘水动力特性及底板稳定性分析  

Study on hydrodynamic characteristics and slab stability of inverted-arch plunge pool at Baihetan hydropower station

作　　者：杨敏[1] 李琳[1] 董天松[2] 张金福[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]长春工程学院,水利与环境工程学院,长春130021

出　　处：《水力发电学报》2013年第3期120-126,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金项目(51179119)

摘　　要：基于水弹性模型试验,研究了白鹤滩水电站水垫塘反拱型底板的水动力荷载特性,结合有限元模型分析了反拱型底板的稳定性并与平底板进行了比较。结果表明,反拱底板与平底板的荷载水平相当。在底板锚固水平4.43 t/m2的条件下,校核工况与设计工况平底板的最小安全系数分别为0.47和0.50,反拱底板的最小安全系数分别为1.11和0.89,而考虑拱座约束的反拱底板则达到1.81和1.75,大幅提高并且更加接近实际受力情况,保证了结果的可靠性。泄洪工况反拱拱座的最大位移1mm,整体稳定有保障。This paper studies the hydrodynamic characteristics of the inverted-arch plunge pool at the Baihetan hydropower station using a hydro-elastic experimental model and finite element analysis. We analyze the stability of inverted-arch slab, and compare it with that of flat slab. The results reveal that the inverted-arch slab has the same load level as the flat one. When a slab anchor level of 4.43 t,/m2 is used, in the conditions of check and design water levels, the smallest safety factors are 0.47 and 0.50 for the flat slab respectively, while they are 1.11 and 0.89 for the inverted-arch slab and become 1.81 and 1.75 if considering the arch shift. Thus, the inverted-arch slab is much safer and their safety factors are closer to the actual conditions. The calculated maximum displacement of arch abutment in the flood releasing condition is only 1 mm, so the overall stability is ensured.

关 键 词：水力学 水利水电工程 水垫塘 水弹性模型 反拱型底板 水动力特性 稳定性 

分 类 号：TV135.2[水利工程—水力学及河流动力学]