Prestressed anchor pin with sand solidified inner head and its anchoring method

A prestressed anchor rod is composed of load-bearing plate, hollow sand cylinder, circular steel ring, steel pipe, anchor rod body, pressure bearing plate and locking nut. The circulare steel ring, steel pipe and pressure bearing plate constitute a rigid closed end instead of wooden one. Its anchor method is also disclosed. Its advantages are low cost, fast and easy operation, and high successfulrate.