Support structure for foundation pit in sludge

The utility model discloses a support structure for a foundation pit in sludge, which comprises a pier body which is distributed in a sludge layer around the foundation pit and formed by ramming broken stone. The support structure can adopt existing forced ramming machinery in the prior art. Natural stone, industrial waste residue, building rubble bricks, old concrete blocks cement fly-ash grave (CFG) pile heads or the like can be used as materials. Cost can be reduced by comprehensively using waste like building rubble bricks so as to achieve considerable economic benefits. The support structure can be finished quickly by using ordinary forced ramming machinery, thereby being simple in process. Simultaneously, pier bodies are not required for coagulation time after being extruded sludge. After construction is finished, excavation can be performed, thereby greatly shortening construction time.