反拱水垫塘多底板块振动特性试验研究

Experimental Study on the Characteristics of the Movement of Slabs in the Invert Arch Plunge Pool

对溪洛渡拱坝工程建立了水力学精细模型,考虑了拱圈底板块锚固力失效,止水破坏,拱圈所有底板块横缝、纵缝和底缝完全贯通的极端情况,利用先进量测系统,测量了高水头、大流量作用下拱圈9个底板块的振动位移,揭示了拱圈多底板块位移沿流程及拱圈的分布规律。结果表明,拱圈多底板块位移特征值沿流程及拱圈呈多峰分布,拱圈在局部拱和整体拱的作用下不会发生整体失稳或强度破坏。

Fine physical model with regard to Xiluodu Water Power Station was made in this experiment. An experimental research on the characteristics of the movement of nine unstable slabs in the invert arch plunge pool was made by advanced measurement methods under extreme conditions of completely damaged watertight seal and invalidated arch rod and under the impact of large discharge from high water head. The displacement distribution laws for the movement of the multi-slabs along longitudinal and lateral flowing path were obtained. The results show that displacement of slabs is distributed by the law of multi-peaks. The arch ring and slabs are not damaged by sympathetic vibration or fatigue of materials.