Hole drilling technology for cohesionless prestressed concrete roof board

Application Number  00129321 Application Date  2000.11.17
Publication Number  1290798 Publication Date  2001.04.11
Priority Information    
Applicant(s) Name  Hu Wei  
Inventor(s) Name  Hu Wei;Hong Xiang;Wang Fushuang  
Patent Agency Code  37100 Patent Agent  wu wei
AbstractThe hole drilling includes the process of digging concrete floor board in the designed position to expose prestressed ribs to be cut, fixing the steel frame in required size in the hole, anchoring post-fitted anchor tackle to the prestressed ribs by usign a special extruder, fixing the anchor tackle onto the steel frame by using baffle plate with U-groove, depositing the hole edge and steel frame into integral steel-concrete frame and final cutting the prestressed ribs after tha concrete reaches its designed strength.