反拱水垫塘底板块上举力变化规律的试验研究  

Experimental Research on Uplift Force Acted on A Piece of Floor of Arch Invert Water Cushion Pool and Estimation to Limit Thrust Load at Skewbacks

作　　者：孙建[1] 陈长植[2] 

机构地区：[1]西安理工大学,西安710048 [2]清华大学,北京100084

出　　处：《应用力学学报》2004年第4期47-51,共5页Chinese Journal of Applied Mechanics

基　　金：国家"九五"重点科技攻关 (96 2 2 1 0 5 0 2 0 2 );国家自然科学基金 (No .5 99790 10 )

摘　　要：反拱水垫塘是一种新型消能防冲结构 ,拟在我国溪洛渡等 30 0m级高拱坝中采用 ,其稳定性是其在高水头、大流量作用下能否安全运用的关键技术之一。结合溪洛渡拱坝 ,试验研究了拱坝坝身泄量达 30 0 0 0m3 /s ,反拱圈横缝止水设施破坏 ,动水压力贯入底板缝隙 ,基岩锚固力失效的极端情况下 ,反拱水垫塘底板块上举力 ,得出底板块上举力分布规律 ,脉动上举力谱密度特性等 ,并推算出拱端的极限推力。研究成果对反拱水垫塘设计、运用和稳定研究具有理论和实际意义。The arch invert water cushion pool is a new type of energy-dissipated and riverbed-protected structure. It is planed to be applied in Xiluodu hydropower project with 300m high arch dam. The stability is one key to ensuring to adopt safely under this condition. The experimental research on uplift force acting on a piece of floor of arch invert water cushion pool is carried out. Accordingly the uplift distributions at a different location and along the water depth downstream, the maximum characteristics, spectral density and limit thrust load at both skewbacks are acquired, which is both theoretically and practically significant for the design and stability analysis.

关 键 词：反拱水垫塘 底板 上举力 拱端极限推力 

分 类 号：TV653[水利工程—水利水电工程]