反拱水垫塘与平底水垫塘底板稳定性的比较

Comparison of Aspects on Stability of Arch Invert Water Cushion Pool with Those of Flat Bottom One

反拱水垫塘是一种新型消能防冲结构,拟在我国溪洛渡等高拱坝中采用,其稳定性是其在高水头、大流量的作用下能否安全运用的关键技术之一。分析了平底水垫塘和反拱水垫塘底板稳定性原理,论证了反拱水垫塘底板具有超载能力强和稳定性高的优点,是高拱坝坝身泄洪消能的合理选择。

The arch invert water cushion pool is a new type of energydissipation and antiscouring structure.It is planed to be applied in Xiluodu high arch dam,whose stability is one of the key technologies which relates to whether it be used on the condition of high water head and large discharge.This paper analyses the stability principle of flat bottom water cushion pool and arch invert water cushion pool,whereby testifying that the invert arch water cushion bottom plate is characterized by strong overloading capacity and high stability so that it is the rational choice for flood discharge and energy dissipation of dam body of high arch dam.