Joint box for forming foundation pit supporting occlusion plain pile

The utility model relates to the technical field of foundation pit supporting, and discloses a joint box for forming an occlusive plain pile for foundation pit supporting, which comprises a box body inserted in a plain pile hole, the box body comprises a filling section arranged in the plain pile hole and an upward extending section extending out of the plain pile hole, and the space filled by the filling section is consistent with the occlusive area of the occlusive pile; the connector box is provided with an arc-shaped inner wall and an arc-shaped outer wall, the arc-shaped outer wall abuts against the inner side wall of the plain pile hole, and the arc-shaped inner wall is arranged away from the inner side wall of the plain pile hole; the joint box for forming the foundation pit supporting occlusion plain pile is inserted into a plain pile hole, part of space of the plain pile hole is occupied by the filling section, after the plain pile hole is filled with concrete, a controlled occlusion area is formed o