Foundation pit supporting and protecting structure

The invention provides a foundation pit supporting and protecting structure. The foundation pit supporting and protecting structure is suitable for being set around the periphery of a foundation pit,and comprises reinforced composite pile bodies, lapping piles, and supporting structures. The reinforced composite pile bodies are suitable for being buried in the soil, and comprise rigid core pilesand semi-rigid pile castings covering the periphery of the pile castings. The lapping piles are rigid or semi-rigid pipes. The lapping piles are adjacent to the reinforced composite pile bodies and arranged in a periodic linear array mode and in a ring shape. The supporting structures are fixedly connected with the reinforced composite pile bodies. At least part of the supporting structures are suitable for being arranged above the soil layer and supporting the structure in the foundation pit. By arranging the reinforced composite piles, the complementary enhancement of the rigid piles and thesemi-rigid piles is formed