Drilling tool system for preventing collapse of grouting hole

The utility model discloses a drilling tool system for preventing a grouting hole from collapsing, which comprises a drill rod, a built-in drill bit component connected with the drill rod, and a sleeve component sleeved on the drill rod and the built-in drill bit component, the built-in drill bit assembly comprises a built-in drill bit, a built-in drill bit connecting piece and a built-in drill bit piston sealing piece which are sequentially connected, the built-in drill bit piston sealing piece is connected with the drill rod, and a one-way valve is arranged in the built-in drill bit. The grouting device can adapt to various construction geological conditions, and collapse of the grouting holes can be effectively prevented. 本实用新型公开一种用于防止注浆孔坍塌的钻具系统，包括：钻杆、与所述钻杆相连接的内置钻头组件、以及套设于所述钻杆及所述内置钻头组件上的套管组件，其中，所述内置钻头组件包括依次连接的内置钻头、内置钻头连接件及内置钻头活塞密封件，所述内置钻头活塞密封件与所述钻杆相连接，所述内置钻头中设有单向阀。本实用新型能够适应多种施工地质条件，可有效防止注浆孔发生坍塌现象。