Large-aperture pretension base plate hollow grouting device

The invention relates to a large-aperture pretension base plate hollow grouting device, which comprises a fastening section A, a grouting section B and an anchoring section C. In the large-aperture pretension base plate hollow grouting device, a mechanical anchoring mode is adopted; by using a structural characteristic of a pouring bayonet nail that the pouring bayonet nail can be opened or closed and can only move forward instead of moving backward according to a diameter of an anchoring rod hole, an anchoring rope can be effectively anchored; meanwhile, pretension can be applied before grouting. The device has a simple structure and lower cost, is accepted by the market easily, is easy to install mechanically or manually. By adoption of the device, the fastening efficiency and the reliability of rock bodies can be effectively improved; and an important technical insurance is provided to support and protect deep soft rock alleys easily and to realize safety production in mines; furthermore, the method is simple and is easy to implement; time and labor are saved; the efficiency is high; and the large-aperture pretension base plate hollow grouting device has a wide practicability.