中国西北高寒地区的碾压混凝土拱坝——龙首拱坝

Longshou Arch Dam——Rolled Compaction Concrete One in Cold Highland Area of North-west China

龙首水电站大坝由左岸重力坝、主河床双曲薄拱坝、右岸推力墩、坝下游短护坦、防冲护坡及由下游围堰改建的二道坝等组成。工程处在中国西北高寒、高地震地区,建设难度较大,施工条件恶劣,且大坝结构非常复杂,但工程从施工准备到第1台机组发电,仅用2年时间,大坝混凝土碾压也只用了1年时间,整个工程的建设是高速度的。文章对大坝的平面布置、新型结构设计、抗渗抗裂研究、材料研究及施工技术作了较全面的介绍。

Longshou Arch Dam is composed of gravity dam section on the left bank, double curve arch dam section at the bed, thrust pier on the right bank, short apron at downstream of the dam, scour revetment and subsidiary dam rebuilt from downstream cofferdam. The project is located at cold highland, highearthquakeintensity area of northwest China, its construction conditions are adverse and the dam structure is very complex, therefore, its construction is very difficult. But It only took two years from construction preparatory work began to the first unit was put into operation and concrete compacting of the dam took only one year too. The paper introduces in detail the plane layout of the dam, newtype structure design, antiseepage and crack resistance research, material research, construction technology and etc..