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箱形空心砌石拱坝或预制吊装箱形空心混凝土拱坝(以下统简称空心拱坝)的经济效果是显著的,同双曲拱坝相比,一般可节省工程量10～40%。由于上述优点,广西先后建成了孔芬、大莫、大廖空心砌石拱坝和飞跃、葛仙岩预制吊装空心混凝土拱坝。这些工程的设计主要参照框格式重力坝拟定尺寸,有的未作应力分析,有的只用纯拱法估算应力,其原因是目前国内还没有合适的空心拱坝理沦计算方法。笔者对此作了探讨,提出箱形空心拱坝的空间框架法,并将计算成果与电测结构模型试验值进行分析对比,两者较接近,说明此法可行。
The economic effect of box-type hollow stone masonry arch dam or prefabricated box-shaped hollow concrete arch dam (hereinafter referred to simply as hollow arch dam) is significant. Compared with double-curvature arch dam, the project can generally save 10-40% of the project volume. Due to the above advantages, Guangxi has successively built Kong Fun, Mo, Liao Hollow Stone Arch Dam and Leap, Ge Xiantan prefabricated hollow concrete arch dam. The design of these projects mainly refers to the frame size of the gravity dam, and some do not make any stress analysis, while others only use the pure arch method to estimate the stress. The reason is that there is no suitable calculation method for the hollow arch dam at present. The author discusses this and puts forward the space frame method of box-type hollow arch dam, and compares the calculated results with the experimental values of the electrical test structure model, which are close to each other, which shows that this method is feasible.