Anti-pulling grabbing lock device suitable for bottom of full-rotation casing pipe pile-forming reinforcement cage of water-rich ultra-thick sand layer

The invention discloses an anti-pulling grabbing lock device suitable for the bottom of a full-rotation casing pipe pile-forming reinforcement cage of a water-rich ultra-thick sand layer, and relates to the technical field of constructional engineering. The anti-pulling grabbing lock device comprises a cylindrical reinforcement cage, a reinforcement cage anti-pulling grabbing lock, a reinforcing bottom support, a movable punching disc, an anti-pulling grabbing lock hole, a stress starting disc, a rigid chain rod and a casing pipe. According to the principle of the anti-pulling grabbing lock device suitable for the bottom of the full-rotation casing pipe pile-forming reinforcement cage of the water-rich ultra-thick sand layer, when the cylindrical reinforcement cage is put down, the stress starting disc of a bottom anti-pulling grabbing lock device is stressed to move upwards, the movable punching disc is driven to move upwards, so that the inner side wall of the anti-pulling grabbing lock hole extrudes the an