The researchers studied how well piles can support buildings in landslide areas. They looked at data from tests on piles in a landslide area called houzishi. They found that the soil at the bottom of the pile affects how much weight the pile can hold. Pile A could only hold 52% as much weight as Pile B. Also, Pile A moved more than Pile B when weight was added. This information can help engineers decide how strong piles need to be in areas with landslides.