Hard sand layer steel pipe pile sinking assisting device and method utilizing high-pressure water jet

The invention provides a hard sand layer steel pipe pile sinking assisting device and method utilizing high-pressure water jet. The problem that defects exist in an existing water jet pile sinking method during use is solved. The hard sand layer steel pipe pile sinking assisting device comprises a steel pipe pile; a positioning ring is mounted in the steel pipe pile; a positioning annular groove is formed in the inner wall of the bottom end of the steel pipe pile; a positioning device matched with the positioning annular groove is mounted on the outer side face of the positioning ring; a water pipe disc is mounted at the bottom of the positioning ring; an annular water pipe is mounted in the water pipe disc; a plurality of arc-shaped grooves are formed in the bottom face of the water pipe disc in a penetrating manner; high-pressure spray heads located in the arc-shaped grooves are spherically hinged to the bottom of the annular water pipe; the annular water pipe is connected with a high-pressure water pipe pe