Ⅰ概说: 池原拱坝建于熊野川水系北山川主流上,高111米,厚度(最大厚度)25米,坝顶长460米。因地形关系,此坝弦长与高度比,它的特征是弦较长。在平面上来说,采用了非对称的特殊的四心拱。拱坝的平面及断面图如图—1所示。为了推算坝的自振频率和振型等振动特性,进行了模型试验。 Ⅰ General: Ikebukuro arch dam was built in the mainstream of the Beichuan River in Xiong Nong Chuan River system, with a height of 111 meters, a maximum thickness of 25 meters and a crest of 460 meters. Due to the terrain, the dam chord length to height ratio, which is characterized by longer chord. On the plane, the use of asymmetric special four-hearted arch. Arch dam of the plane and section shown in Figure -1. In order to calculate the natural vibration frequency and mode vibration characteristics of the dam, a model test was carried out.