Self-tapping recoverable deep foundation ditch anchor rod

The utility model provides a self tapping recyclable deep foundation pit anchor rod which can be broadly applied to the anchoring and timbering the foundation pits of a common clay layer and a high level soft soil layer; the utility model mainly comprises a connection disc, the tail part joint of the anchor rod, a rod body, an extension welding piece, a middle joint, a bush joint, a front end joint, a front end anchor rod, and a front end aiguille; the tail part joint of the anchor rod is provided with a screw thread; the outsides of the rod body, the bush joint, and the front end anchor rod are surrounded by a deformed triangle steel wire to form a spiral shape; and the aiguille is welded on the front end anchor rod. The anchor rod has the main advantages of: 1, directly screwing the anchor rod into a soil layer without drilling in advance and needing not to use the technical means like filling cement and an anchor rod agent and the like to carry out anchoring treatment, thus extensively improving the constr