Indoor similar model test device for vertical bearing characteristic of single core-adding pile

The invention relates to an indoor similar model test device for a vertical bearing characteristic of a single core-adding pile. The device comprises a model box and a loading device, the upper end of the model box is open, a side plate of the model box adopts a transparent plate, the model box is filled with foundation soil, the foundation soil is formed by filling common sand and colored sand in a layered manner, and a semi-cylindrical core-adding pile is pre-buried in the foundation soil close to the side plate; the tangent plane of the semi-cylindrical cored pile faces outwards; and the loading device is used for applying pressure to the single semi-cylindrical core-adding pile. The device has the beneficial effects that the foundation soil in the model box is formed by alternately paving colored sand and common sand, various types of semi-cylindrical core-adding piles are arranged on the boundary, and when the transparent plates are adopted as the side plates of the model box, the vertical and lateral di