METHOD OF PROCESSING TERMINAL END OF DRAIN BOARD FOR IMPROVING SOFT GROUND AND PROTECTING DEVICE THEREOF

摘要

PURPOSE:To perform a work to reliably drive a drain board, by a method wherein, at the terminal end of a drain board, the terminal end itself is bent to form a loop for securing, and the loop part is bent in a flat manner, and is driven in a condition in which the loop is parted on the center into both sides of the mandrel. CONSTITUTION:In the lower end of a drain board D, the lower end part itself is bent to form a looped part 6, and the board is stapled 8 in a condition in which the terminal end of the board is passed through a rubber ring 7. The looped part 6 is parted into both sides of the mandrel in a manner that a part of the upper part of the stapled part 8 is caused to enter the hollow part of the mandrel M, and with this, the drain board is driven in a ground. After driving is completed, the drain board is started to be lowered commencing with a part which is firmly adhered to the side of the mandrel, and the central part is disengaged in a manner that the central part is pulled sidewardly after it is raised to some extent. This enables to perform a simple work by means of the minimum number of labors, and permits economical driving of the board.