Deep foundation pit supporting structure

The utility model relates to the technical field of deep foundation pit supporting, in particular to a deep foundation pit supporting structure which comprises a first-layer basement, a second-layer basement is arranged below the first-layer basement, a plurality of pile holes are formed between the first-layer basement and the second-layer basement, and an advanced rib column is arranged in each pile hole. Anchor rods are arranged in the first-layer basement, the advanced rib columns penetrate through the anchor rods, the ends of the anchor rods are located in a foundation of the first-layer basement, the advanced rib columns are covered with crown beams, the first-layer basement and the second-layer basement form a step shape, and the first-layer basement and the second-layer basement are supported in a combined supporting mode of the advanced rib columns and the anchor rods. The stability of a soil body on the edge of the foundation pit can be effectively protected, the bearing capacity of a deepened area