Foundation pit supporting structure

The utility model relates to a foundation pit supporting structure. The utility model belongs to the technical field of building foundation pits. The utility model discloses a foundation pit supporting structure. Wherein the steel sheet piles are arranged on the two sides of a foundation pit, and the cast-in-place piles are perpendicular to the foundation pit. The cast-in-place pile is arranged inthe middle of the foundation pit; the top of the cast-in-place pile is fixedly connected with a horizontal steel pipe transverse support; the two ends of the horizontal steel pipe transverse supportabut against the steel sheet piles. The horizontal steel pipe cross brace comprises a steel pipe cross brace body and a moving rod with one end inserted into the steel pipe cross brace body, a springis arranged in the steel pipe cross brace body and arranged between the cast-in-place pile and the moving rod, the two ends of the spring are fixedly connected with the cast-in-place pile and the moving rod respectively, and th