高拱坝水垫塘反拱型底板的体型

反拱型底板的稳定性是实现消能防冲的关键所在，为了研究反拱型底板块各体型参数对其稳定性的影响，结合某高拱坝水垫塘反拱型底板稳定性的实验研究，采用有限元数学模型及局部稳定性力学模型，从反拱水垫塘底板的圆心角、板块厚度、板块尺度和锚固水平等几个方面分析了底板稳定性与其体型的关系．结果表明，拱圈的圆心角及板块尺度不宜过大，板块厚度在满足稳定性要求的基础上可做适当调整，而锚固钢筋应尽量做到均匀布置．

Configuration of Counter-Arched Slab in Plunge Pool of High Arch Dam

The stability of counter-arched slab is the key to energy dissipation and erosion control. To investigate the effect of the configuration parameter of counter-arched slab on its stability, the relationship between the stability and the configuration of the counter-arched slab was analyzed from central angle, thickness, scale and anchorage strength by applying the finite element model and the mechanical model of local stability combined with the stability experimental study of counter;arched slab in plunge pool of a high arch dam. The result indicates that both the central angle and slab dimension should keep in a small scale, the thickness can be adjusted in the case of keeping its stability, and the anchoring bar should be fixed up evenly.