一、概要位于中美洲洪都拉斯的高226m的埃尔卡洪拱坝,设计时着重研究了它的抗震特性。大坝修建在狭窄的河谷上,河谷两侧有大断层。基于上述原因,要进行大量开挖,使大坝座落在断层区后的坚硬岩石上。因此,坝体有相当多的迎水面接近于岩石开挖面,在它们之间的库水从坝体迎水面延伸一定的距离,这个区域称作“水槽区”。本文将叙述模拟动水压力影响的分析方 I. OVERVIEW The 226m high El Cajon dam, located in Honduras, Central America, was designed with emphasis on its seismic behavior. Dam built in a narrow valley, the valley has a large fault on both sides. For the above reasons, a large amount of excavation has to be carried out so that the dam is located on a hard rock behind the fault zone. Therefore, the dam body has a large number of welcoming water faces close to the rock excavation face, and the reservoir water between them extends a certain distance from the water level of the dam body. This region is called “sink zone.” This article will describe the analytical equations that simulate hydrodynamic pressure effects