Dismantling-free buttress for upper-layer support of stair platform

The utility model relates to a dismantling-free buttress for an upper-layer support of a stair platform. The dismantling-free buttress for the upper-layer support of the stair platform comprises a plurality of circular truncated cones which are stacked up and down; and the side surface of the circular truncated cone is a curved surface. The contact area between the buttress and the poured concrete is increased by the curved surface, so that the adhesive force between the buttress and the concrete is increased; meanwhile, the curved surface and the solidified concrete form a buckle structure, so that the connecting strength of the buttress and the concrete can be improved, and finally, the structural strength of a stair platform or a step at the buttress is improved. 本实用新型涉及一种楼梯平台上层支架免拆除支墩；该楼梯平台上层支架免拆除支墩包括若干上下叠加的圆台；该圆台侧面为曲纹面。该曲纹面增大了支墩与浇筑混凝土的接触面积，从而增大支墩与混凝土的粘合力；同时，曲纹面与凝固后的混凝土形成卡扣结构，可提高支墩与混凝土的连接强度，最终提高支墩处的楼梯平台或踏步的结构强度。