Abstract: The perforative crack found at gravity buttress at right bank of Dashankou arch dam. The author considered the cracks at the gravity buttress on two banks caused by temperature stress by analyzing the cause of cracks. Although the crack did not resulted in stress increase of dam body and unstable in dam shoulder, the stress at battress heel exceeded the quantity defined by specification. This paper puts forward crack seal and the treatment scheme of pre-stress anchor in vertical direction.?

摘要： 大山口水电站拱坝右岸重力墩出现贯穿性裂缝,本文通过对两岸重力墩裂缝成因的分析，认为主要是由温度应力引起，裂缝的产生虽然没有导致坝体应力恶化或坝肩失稳，但在重力墩踵部出现了超规范的拉应力。最后提出了缝面封闭和竖直向预应力锚索的处理方案。