Directly buried pipe structure

A directly-buried pipe structure comprises an outer sleeve, a lower drainage pipe, an upper drainage pipe and a sealing material. The outer sleeve is pre-buried in a floor slab and vertically penetrates through the floor slab; wherein the bottom of the outer sleeve is flush with the bottom surface of the floor, and the top of the outer sleeve exceeds the top surface of the floor; the lower drainage pipe is inserted into the outer sleeve from the lower port of the outer sleeve, and the top of the lower drainage pipe is located below the top surface of the floor; the upper drainage pipe is inserted into the outer sleeve from the upper port of the outer sleeve and is spliced with the lower drainage pipe; and the sealing material is filled in a gap between the upper drainage pipe and the outersleeve and a gap between the lower drainage pipe and the outer sleeve. The utility model solves the technical problems of many construction procedures, long construction time, high construction costand large hidden danger of