The utility model discloses a combined
pile foundation for reinforcing a prestressed
pipe pile, and belongs to the technical field of constructional
engineering, the combined
pile foundation comprises a foundation part and a
pipe pile part, the foundation part comprises an upper structure foundation, a plain concrete
cushion layer, a garbage landfill layer and a bearing stratum soil body from top to bottom, and the
pipe pile part comprises the prestressed pipe pile, a steel pipe pile and a reinforcement cage; a steel grouting floral tube I is inserted into the reinforcement cage; the prestressed pipe pile is novel in design and ingenious in device, by arranging the first steel grouting floral tube, the steel rod, the steel plate, the pushing blocks, the inserting plate and the
drill bit, the steel rod is rotated to drive the multiple pushing blocks to rotate, the pushing blocks output pushing force, under the action of the pushing force, the inserting plate extends out of the steel plate, the firmness of the first steel grouting floral tube is improved through the inserting plate, and therefore the stability of the prestressed pipe pile is enhanced; when the first steel grouting floral tube is inserted, the
drill bit can go deep into the bottom layer more quickly and conveniently, and the stability is improved while the use efficiency is improved.