| 摘要 |
PURPOSE:To simplify the treatment work for pile head by setting a specific fluid bag in the pile head position of an iron bar assembly provided concentrically in an excavated pit. CONSTITUTION:An iron bar assembly 3 is set concentrically in a pit 2 of given diameter and depth, and fluid bags 6 and 7 in contracted state are attached to the inside and outside of the assembly 3 at the height A of a pile to be built up finally. A liquid concrete is injected to a position B higher than the position A in the pit 2, and immediately thereafter a fluid pressure is supplied into the bags 6 and 7 to expand the bags 6 and 7 on the inside and outside of the upper part 5 of the assembly 3. By this, the concrete and slime present between the positions A and B can be removed out. |
