拱坝作为一种比较经济的坝型,近几年来在我省有较快的发展。结构上,初期多采用浆砌块石重力拱坝,近期大部分采用浆砌块石或条石薄拱坝,也有少数混凝土坝。泄洪普遍地采用坝顶自由溢流式。拱坝泄洪方式随着枢纽工程所在地的地形、地质、枢纽布置及水力条件的不同,型式多种多样,大致可分为孔口、两岸用滑雪道式溢洪道对冲、坝身挑流及坝顶溢流等数种,而坝顶溢流式是最简单经济的一种。溢流段长度,有全坝段溢流的,也有仅中 Arch dam as a more economical dam, in recent years in our province has a faster development. Structurally, the initial use of masonry stone gravity arch dam, the recent use of most of the masonry block or thin stone arch dam, there are a few concrete dams. Spillway commonly used free crest overflow type. Flood Diversion Method of Arch Dam Along with the topography, geology, hub layout and hydraulic conditions of the hub project, the types of flood diversion can be divided into two types: the orifice, the ski slope spillway hedge, the dam body flow and the dam crest Flow and other species, while the overflow crest is the most simple kind of economy. Overflow section length, a full dam overflow, there are only in