Manually excavated hole broadening method and manually excavated hole broadening stabilization structure

The invention provides a manually excavated hole broadening method and a hole broadening stabilization structure. The method comprises the following steps: 1, completing preparatory work before construction; 2, setting out a pile position; 3, excavating a hole and a protection wall to the elevation of the bottom of a broadened hole; 4, calibrating a hole part needing to be broadened on a hole wall; 5, drilling holes in soil at the beginning end of the hole part needing to be broadened along the hole wall, and inserting steel perforated pipes in the holes; 6, checking whether the positions of the steel perforated pipes in the holes remain stable and are not deviated, and clearing out dust in the holes; 7, injecting slurry, that is, injecting slurry into the steel perforated pipes for stabilizing and shaping; 8, performing manual hole broadening. In the process, the manual hole broadening stabilization structure is formed. The method provided by the invention reinforces the hole wall and guarantees the safety o