| 摘要 |
PURPOSE:To raise the drawing resistance of anochor rods by a method in which an anchor rod having u-shaped notches on its wall and a closing metal on its tip end opening is covered with a heat-shrink tube and penetrated into the ground, and an expandible mateial is injected through the rear end opening of the rod. CONSTITUTION:An anchor rod A covered with a heat-shrink tube 5 is driven through its closing metal 4 into a banking 8, and then an expandible material 9 is injected through the rear end opening 1b of the rod A. The expandible material 9 injected expands and bardens to produce a maximum expansion pressure after the lapse of about 12-24hrs, whereby the heat-shrink tube 5 is broken and u-shaped tongue pieces 3 erect. By this, the anchor rod body 1 is expanded to give a drawing resistance to the anchor rod A. |
