水垫塘反拱形底板体型研究

Study on type of the counter-arched slab in plunge pool

在射流冲击荷载的作用下 ,反拱形水垫塘底板主要依靠拱端提供的推力来维持其整体和局部的稳定性。在相同安全标准前提下 ,所需拱端推力与反拱体形有关。本文结合某高拱坝水垫塘反拱形底板稳定性的研究 ,从反拱的体型、单个板块的尺度等方面 ,分析了单个板块的局部稳定性和整体稳定性与反拱体型的关系。结果表明 ,从反拱结构的整体稳定和局部稳性定两方面考虑 。

The counter arched slab in plunge pool keeps its stability depends mainly on the thrust at Springer when the load of jet flow acts on it.The needed thrust at the Springer relate to the type of counter arched at the same safety standard.Depends on the stability study on counter arched slab in plunge pool of a high arch dam,the relations between the local stability and the monolithic stability and the type of the counter arched slab were analyses in this paper.The results indicate that bigger curvature and larger scale of a slab is not suitable for the monolithic stability and the local stability.