English：

Taking the foundation excavation of a typical station in the karst development area of ShenzhenSubway Line 16 as the research object, the numerical calculation and analysis of the inrush law of thefoundation excavation in the karst area are carried out. The results indicate that the following four factors,the horizontal position of the karst cave at the bottom of the foundation excavation, the shape of the karstcave, the corrosion crack, and the collusion of the karst cave group, will affect the expansion law of theplastic zone at the bottom of the foundation excavation and the location of the weak point of the inrush. Inthe case of a single karst cave, the weak position of the foundation excavation inrush is more likely toappear on the inner side of the foundation excavation. The karst cave with a transverse size larger than avertical size is more prone to foundation excavation inrush. The weak position of the foundation excavationinrush is prone to the occurrence on the inclined side of the crack. In the process of foundationexcavation, the expansion law of the plastic zone around the upper and lower karst caves is morecomplicated than that of a single karst cave when the vertical layered karst cave group collides.