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 Plate of Arch Invert Water Cushion Pool

结合溪洛渡拱坝,模型试验研究了拱坝坝身泄量最大时,在反拱圈横缝止水设施破坏、动水压强贯入底板缝隙、基岩锚固力失效的极端情况下,反拱水垫塘底板块上举力的分布规律及脉动上举力谱密度特性等。该成果对反拱水垫塘的设计、运用及稳定性研究具有理论和实际意义。

In combination with Xiluodu arch dam,model test studies the distribution laws of uplift force acted on a piece of floor plate of an arch invert water cushion pool and the density properties of uplift force spectrum when the arch dam body has the maximum discharge flow and in the extreme cases of the arch invert ring horizontal sealing facilities damages,dynamic water pressure infiltrating into the floor plate seams and bedrock anchoring force falure.Accordingly,research results are of the theoretical and practical significance for the design,operation and stability studies of arch invert water cushion pool.