Scaffold platform device for pipe jacking open caisson construction

The utility model relates to a scaffold platform device for pipe-jacking open caisson construction. The scaffold platform device for pipe-jacking open caisson construction comprises a plurality of triangular supporting frameworks, connecting steel bars and scaffold boards. The triangular supporting framework is made into an isosceles triangle through steel pipes, an insertion section is reserved at the joint of one right-angle side and the other right-angle side, and the triangular supporting framework can be inserted into an embedded hole in the well wall of a previous open caisson through the insertion section. The triangular supporting frameworks are horizontally arranged at intervals at the same height, the adjacent triangular supporting frameworks are connected through the connecting steel bars to form a horizontal plane framework, and the scaffold boards are laid on the horizontal plane framework to form a horizontal plane. During pipe-jacking open caisson construction, the open caisson construction spe