Large-size barb pile technology

The invention discloses a large-size barb pile technology suitable for land or ocean geotechnical engineering. A prefabricated or cast-in-place main pile, a hollow interlayer with the closed bottom and a prefabricated barb reinforcing body are included. And after the open main pile and the interlayer are implemented in place, the barbs are pressed into surrounding rock-soil bodies from the preset opening positions of the side wall of the main pile through the cavity of the interlayer, or after the main pile is drilled, the barbs are implemented firstly, and then main pile concrete is poured. The length of a single barb is slightly smaller than the inner diameter of the main pile, the abduction effect which is close to two times of the diameter of the main pile can be achieved by symmetrically arranging the barbs on the two sides, and enhanced bearing capacity, rigidity and stability are provided for a pile anchor structure. The problems that a conventional large-size pile is large in material consumption and