Deep foundation pit supporting structure

The utility model relates to the technical field of foundation pit supporting, and discloses a deep foundation pit supporting structure which comprises a steel pipe pile, Larsen steel sheet piles are fixedly welded to the inner side of the steel pipe pile, a fixing plate is movably connected to the outer side of each Larsen steel sheet pile, and a profile steel waist beam is fixedly connected to one side of each fixing plate. An inner support is movably installed on the inner wall of the profile steel waist beam, a connecting plate is movably connected to the bottom of the inner side of the Larsen steel sheet pile in a clamped mode, and a filter plate is movably connected to one side of the connecting plate in a clamped mode. Therefore, the Larsen steel sheet piles overcome the difficulty that the Larsen steel sheet piles are difficult to drive in a pebble bed, soil retaining and water resisting are facilitated, meanwhile, the steel pipe piles play a role of stand columns, the anti-overturning stability of th