Supporting structure of waterproof basement

Supporting columns are fixedly arranged on the ground in an inserted mode, positioning strips are fixedly arranged on the side faces of the supporting columns, water stop walls are arranged between the adjacent supporting columns in an inserted mode, more than two water stop walls are connected end to end to form a closed enclosure structure, limiting grooves are formed in the side faces of the water stop walls, and the positioning strips are matched with the limiting grooves in an inserted mode. A reinforcing piece is fixedly arranged on the outer side of the water stop wall and comprises a clamping block, a wedge block, a first spring and a sleeve, a cavity is formed in the water stop wall, a through hole is formed in the outer side wall of the water stop wall and communicates with the cavity, the clamping block can be clamped in the through hole, the wedge block is slidably connected to the bottom of the clamping block, one end of the first spring is connected to the bottom wall of the clamping block, and